Add linter to restrict direct usage of registerContentObserver() API.

Forbid direct usage of register/unregister content observer APIs from the ContentResolver class.
Instead direct the caller to use wrapper APIs in SettingsProxy and its sub-classes.

Bug: 353191254
Test: atest RegisterContentObserverViaContentResolverDetectorTest
Flag: NONE new linter check

Change-Id: I50db306d5dc7c2ac6a146586f7d336c32765b462

4 files changed, 941 insertions, 1 deletions

diff --git a/packages/SystemUI/checks/src/com/android/internal/systemui/lint/RegisterContentObserverViaContentResolverDetector.kt b/packages/SystemUI/checks/src/com/android/internal/systemui/lint/RegisterContentObserverViaContentResolverDetector.kt
new file mode 100644
index 000000000000..8f5cdbf0b2bc
--- /dev/null
+++ b/packages/SystemUI/checks/src/com/android/internal/systemui/lint/RegisterContentObserverViaContentResolverDetector.kt
@@ -0,0 +1,105 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.internal.systemui.lint
+
+import com.android.tools.lint.detector.api.Category
+import com.android.tools.lint.detector.api.Detector
+import com.android.tools.lint.detector.api.Implementation
+import com.android.tools.lint.detector.api.Issue
+import com.android.tools.lint.detector.api.JavaContext
+import com.android.tools.lint.detector.api.Scope
+import com.android.tools.lint.detector.api.Severity
+import com.android.tools.lint.detector.api.SourceCodeScanner
+import com.intellij.psi.PsiMethod
+import org.jetbrains.uast.UCallExpression
+import org.jetbrains.uast.UClass
+import org.jetbrains.uast.getParentOfType
+
+/**
+ * Checks if registerContentObserver/registerContentObserverAsUser/unregisterContentObserver is
+ * called on a ContentResolver (or subclasses), and directs the caller to using
+ * com.android.systemui.util.settings.SettingsProxy or its sub-classes.
+ */
+@Suppress("UnstableApiUsage")
+class RegisterContentObserverViaContentResolverDetector : Detector(), SourceCodeScanner {
+
+    override fun getApplicableMethodNames(): List<String> {
+        return CONTENT_RESOLVER_METHOD_LIST
+    }
+
+    override fun visitMethodCall(context: JavaContext, node: UCallExpression, method: PsiMethod) {
+        val classQualifiedName = node.getParentOfType(UClass::class.java)?.qualifiedName
+        if (classQualifiedName in CLASSNAME_ALLOWLIST) {
+            // Don't warn for class we want the developers to use.
+            return
+        }
+
+        val evaluator = context.evaluator
+        if (evaluator.isMemberInSubClassOf(method, "android.content.ContentResolver")) {
+            context.report(
+                issue = CONTENT_RESOLVER_ERROR,
+                location = context.getNameLocation(node),
+                message =
+                    "`ContentResolver.${method.name}()` should be replaced with " +
+                        "an appropriate interface API call, for eg. " +
+                        "`<SettingsProxy>/<UserSettingsProxy>.${method.name}()`"
+            )
+        }
+    }
+
+    companion object {
+        @JvmField
+        val CONTENT_RESOLVER_ERROR: Issue =
+            Issue.create(
+                id = "RegisterContentObserverViaContentResolver",
+                briefDescription =
+                    "Content observer registration done via `ContentResolver`" +
+                        "instead of `SettingsProxy or child interfaces.`",
+                // lint trims indents and converts \ to line continuations
+                explanation =
+                    """
+                        Use registerContentObserver/unregisterContentObserver methods in \
+                        `SettingsProxy`, `UserSettingsProxy` or `GlobalSettings` class instead of \
+                        using `ContentResolver.registerContentObserver` or \
+                        `ContentResolver.unregisterContentObserver`.""",
+                category = Category.PERFORMANCE,
+                priority = 10,
+                severity = Severity.ERROR,
+                implementation =
+                    Implementation(
+                        RegisterContentObserverViaContentResolverDetector::class.java,
+                        Scope.JAVA_FILE_SCOPE
+                    )
+            )
+
+        private val CLASSNAME_ALLOWLIST =
+            listOf(
+                "com.android.systemui.util.settings.SettingsProxy",
+                "com.android.systemui.util.settings.UserSettingsProxy",
+                "com.android.systemui.util.settings.GlobalSettings",
+                "com.android.systemui.util.settings.SecureSettings",
+                "com.android.systemui.util.settings.SystemSettings"
+            )
+
+        private val CONTENT_RESOLVER_METHOD_LIST =
+            listOf(
+                "registerContentObserver",
+                "registerContentObserverAsUser",
+                "unregisterContentObserver"
+            )
+    }
+}
diff --git a/packages/SystemUI/checks/src/com/android/internal/systemui/lint/SystemUIIssueRegistry.kt b/packages/SystemUI/checks/src/com/android/internal/systemui/lint/SystemUIIssueRegistry.kt
index 5206b05a3f4e..a1f4f5507e5f 100644
--- a/packages/SystemUI/checks/src/com/android/internal/systemui/lint/SystemUIIssueRegistry.kt
+++ b/packages/SystemUI/checks/src/com/android/internal/systemui/lint/SystemUIIssueRegistry.kt
@@ -46,7 +46,8 @@ class SystemUIIssueRegistry : IssueRegistry() {
                 DemotingTestWithoutBugDetector.ISSUE,
                 TestFunctionNameViolationDetector.ISSUE,
                 MissingApacheLicenseDetector.ISSUE,
-                RegisterContentObserverSyncViaSettingsProxyDetector.SYNC_WARNING
+                RegisterContentObserverSyncViaSettingsProxyDetector.SYNC_WARNING,
+                RegisterContentObserverViaContentResolverDetector.CONTENT_RESOLVER_ERROR
             )
 
     override val api: Int
diff --git a/packages/SystemUI/checks/tests/com/android/internal/systemui/lint/RegisterContentObserverViaContentResolverDetectorTest.kt b/packages/SystemUI/checks/tests/com/android/internal/systemui/lint/RegisterContentObserverViaContentResolverDetectorTest.kt
new file mode 100644
index 000000000000..1d33bce8dea8
--- /dev/null
+++ b/packages/SystemUI/checks/tests/com/android/internal/systemui/lint/RegisterContentObserverViaContentResolverDetectorTest.kt
@@ -0,0 +1,207 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.internal.systemui.lint
+
+import com.android.tools.lint.checks.infrastructure.TestFiles
+import com.android.tools.lint.detector.api.Detector
+import com.android.tools.lint.detector.api.Issue
+import org.junit.Test
+
+class RegisterContentObserverViaContentResolverDetectorTest : SystemUILintDetectorTest() {
+
+    override fun getDetector(): Detector = RegisterContentObserverViaContentResolverDetector()
+
+    override fun getIssues(): List<Issue> =
+        listOf(RegisterContentObserverViaContentResolverDetector.CONTENT_RESOLVER_ERROR)
+
+    @Test
+    fun testRegisterContentObserver_throwError() {
+        lint()
+            .files(
+                TestFiles.java(
+                        """
+                    package test.pkg;
+                    import android.content.Context;
+
+                    public class TestClass {
+                        public void register(Context context) {
+                          context.getContentResolver().
+                            registerContentObserver(Settings.Global.getUriFor(Settings.Global.DEVICE_PROVISIONED),
+                                false, mSettingObserver);
+                        }
+                    }
+                """
+                    )
+                    .indented(),
+                *androidStubs
+            )
+            .issues(RegisterContentObserverViaContentResolverDetector.CONTENT_RESOLVER_ERROR)
+            .run()
+            .expect(
+                """
+                src/test/pkg/TestClass.java:7: Error: ContentResolver.registerContentObserver() should be replaced with an appropriate interface API call, for eg. <SettingsProxy>/<UserSettingsProxy>.registerContentObserver() [RegisterContentObserverViaContentResolver]
+                        registerContentObserver(Settings.Global.getUriFor(Settings.Global.DEVICE_PROVISIONED),
+                        ~~~~~~~~~~~~~~~~~~~~~~~
+                1 errors, 0 warnings
+            """
+                    .trimIndent()
+            )
+    }
+
+    @Test
+    fun testRegisterContentObserverForUser_throwError() {
+        lint()
+            .files(
+                TestFiles.java(
+                        """
+                    package test.pkg;
+                    import android.content.Context;
+
+                    public class TestClass {
+                        public void register(Context context) {
+                          context.getContentResolver().
+                            registerContentObserverAsUser(Settings.Global.getUriFor(Settings.Global.DEVICE_PROVISIONED),
+                                false, mSettingObserver);
+                        }
+                    }
+                """
+                    )
+                    .indented(),
+                *androidStubs
+            )
+            .issues(RegisterContentObserverViaContentResolverDetector.CONTENT_RESOLVER_ERROR)
+            .run()
+            .expect(
+                """
+                src/test/pkg/TestClass.java:7: Error: ContentResolver.registerContentObserverAsUser() should be replaced with an appropriate interface API call, for eg. <SettingsProxy>/<UserSettingsProxy>.registerContentObserverAsUser() [RegisterContentObserverViaContentResolver]
+        registerContentObserverAsUser(Settings.Global.getUriFor(Settings.Global.DEVICE_PROVISIONED),
+        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+1 errors, 0 warnings
+            """
+                    .trimIndent()
+            )
+    }
+
+    @Test
+    fun testSuppressRegisterContentObserver() {
+        lint()
+            .files(
+                TestFiles.java(
+                        """
+                    package test.pkg;
+                    import android.content.Context;
+
+                    public class TestClass {
+                        @SuppressWarnings("RegisterContentObserverViaContentResolver")
+                        public void register(Context context) {
+                          context.getContentResolver().
+                            registerContentObserver(Settings.Global.getUriFor(Settings.Global.DEVICE_PROVISIONED),
+                                false, mSettingObserver);
+                        }
+                    }
+                """
+                    )
+                    .indented(),
+                *androidStubs
+            )
+            .issues(RegisterContentObserverViaContentResolverDetector.CONTENT_RESOLVER_ERROR)
+            .run()
+            .expectClean()
+    }
+
+    @Test
+    fun testRegisterContentObserverInSettingsProxy_allowed() {
+        lint()
+            .files(
+                TestFiles.java(
+                        """
+                    package com.android.systemui.util.settings;
+                    import android.content.Context;
+
+                    public class SettingsProxy {
+                        public void register(Context context) {
+                          context.getContentResolver().
+                            registerContentObserver(Settings.Global.getUriFor(Settings.Global.DEVICE_PROVISIONED),
+                                false, mSettingObserver);
+                        }
+                    }
+                """
+                    )
+                    .indented(),
+                *androidStubs
+            )
+            .issues(RegisterContentObserverViaContentResolverDetector.CONTENT_RESOLVER_ERROR)
+            .run()
+            .expectClean()
+    }
+
+    @Test
+    fun testNoopIfNoCall() {
+        lint()
+            .files(
+                TestFiles.java(
+                        """
+                    package test.pkg;
+                    import android.content.Context;
+
+                    public class SettingsProxy {
+                        public void register(Context context) {
+                        }
+                    }
+                """
+                    )
+                    .indented(),
+                *androidStubs
+            )
+            .issues(RegisterContentObserverViaContentResolverDetector.CONTENT_RESOLVER_ERROR)
+            .run()
+            .expectClean()
+    }
+
+    @Test
+    fun testUnRegisterContentObserver_throwError() {
+        lint()
+            .files(
+                TestFiles.java(
+                        """
+                    package test.pkg;
+                    import android.content.Context;
+
+                    public class TestClass {
+                        public void register(Context context) {
+                          context.getContentResolver().
+                            unregisterContentObserver(mSettingObserver);
+                        }
+                    }
+                """
+                    )
+                    .indented(),
+                *androidStubs
+            )
+            .issues(RegisterContentObserverViaContentResolverDetector.CONTENT_RESOLVER_ERROR)
+            .run()
+            .expect(
+                """
+                src/test/pkg/TestClass.java:7: Error: ContentResolver.unregisterContentObserver() should be replaced with an appropriate interface API call, for eg. <SettingsProxy>/<UserSettingsProxy>.unregisterContentObserver() [RegisterContentObserverViaContentResolver]
+                        unregisterContentObserver(mSettingObserver);
+                        ~~~~~~~~~~~~~~~~~~~~~~~~~
+                1 errors, 0 warnings
+            """
+                    .trimIndent()
+            )
+    }
+}
diff --git a/packages/SystemUI/lint-baseline.xml b/packages/SystemUI/lint-baseline.xml
index b4c839f08607..7577147a6f16 100644
--- a/packages/SystemUI/lint-baseline.xml
+++ b/packages/SystemUI/lint-baseline.xml
@@ -32157,4 +32157,631 @@
             column="6"/>
     </issue>
 
+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.registerContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.registerContentObserver()`"
+        errorLine1="                contentResolver.registerContentObserver("
+        errorLine2="                                ~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SystemUI/src/com/android/keyguard/ActiveUnlockConfig.kt"
+            line="154"
+            column="33"/>
+    </issue>
+
+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.registerContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.registerContentObserver()`"
+        errorLine1="            resolver.registerContentObserver(ALWAYS_ON_DISPLAY_CONSTANTS_URI,"
+        errorLine2="                     ~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/doze/AlwaysOnDisplayPolicy.java"
+            line="164"
+            column="22"/>
+    </issue>
+
+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.registerContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.registerContentObserver()`"
+        errorLine1="                resolver.registerContentObserver("
+        errorLine2="                         ~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/util/animation/data/repository/AnimationStatusRepository.kt"
+            line="61"
+            column="26"/>
+    </issue>
+
+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.unregisterContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.unregisterContentObserver()`"
+        errorLine1="                awaitClose { resolver.unregisterContentObserver(observer) }"
+        errorLine2="                                      ~~~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/util/animation/data/repository/AnimationStatusRepository.kt"
+            line="67"
+            column="39"/>
+    </issue>
+
+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.unregisterContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.unregisterContentObserver()`"
+        errorLine1="                    mContentResolver.unregisterContentObserver(mSettingObserver);"
+        errorLine2="                                     ~~~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/battery/BatteryMeterViewController.java"
+            line="123"
+            column="38"/>
+    </issue>
+
+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.unregisterContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.unregisterContentObserver()`"
+        errorLine1="        mContentResolver.unregisterContentObserver(mSettingObserver);"
+        errorLine2="                         ~~~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/battery/BatteryMeterViewController.java"
+            line="180"
+            column="26"/>
+    </issue>
+
+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.registerContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.registerContentObserver()`"
+        errorLine1="        mContentResolver.registerContentObserver("
+        errorLine2="                         ~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/battery/BatteryMeterViewController.java"
+            line="211"
+            column="26"/>
+    </issue>
+
+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.registerContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.registerContentObserver()`"
+        errorLine1="        mContentResolver.registerContentObserver("
+        errorLine2="                         ~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/battery/BatteryMeterViewController.java"
+            line="219"
+            column="26"/>
+    </issue>
+
+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.registerContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.registerContentObserver()`"
+        errorLine1="        resolver.registerContentObserver("
+        errorLine2="                 ~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/demomode/DemoModeAvailabilityTracker.kt"
+            line="46"
+            column="18"/>
+    </issue>
+
+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.registerContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.registerContentObserver()`"
+        errorLine1="        resolver.registerContentObserver("
+        errorLine2="                 ~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/demomode/DemoModeAvailabilityTracker.kt"
+            line="48"
+            column="18"/>
+    </issue>
+
+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.unregisterContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.unregisterContentObserver()`"
+        errorLine1="        resolver.unregisterContentObserver(allowedObserver)"
+        errorLine2="                 ~~~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/demomode/DemoModeAvailabilityTracker.kt"
+            line="54"
+            column="18"/>
+    </issue>
+
+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.unregisterContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.unregisterContentObserver()`"
+        errorLine1="        resolver.unregisterContentObserver(onObserver)"
+        errorLine2="                 ~~~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/demomode/DemoModeAvailabilityTracker.kt"
+            line="55"
+            column="18"/>
+    </issue>
+
+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.registerContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.registerContentObserver()`"
+        errorLine1="                resolver.registerContentObserver(mQuickPickupGesture, false, this,"
+        errorLine2="                         ~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/DozeParameters.java"
+            line="511"
+            column="26"/>
+    </issue>
+
+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.registerContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.registerContentObserver()`"
+        errorLine1="                resolver.registerContentObserver(mPickupGesture, false, this, UserHandle.USER_ALL);"
+        errorLine2="                         ~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/DozeParameters.java"
+            line="513"
+            column="26"/>
+    </issue>
+
+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.registerContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.registerContentObserver()`"
+        errorLine1="                resolver.registerContentObserver(mAlwaysOnEnabled, false, this,"
+        errorLine2="                         ~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/DozeParameters.java"
+            line="514"
+            column="26"/>
+    </issue>
+
+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.registerContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.registerContentObserver()`"
+        errorLine1="        mContext.getContentResolver().registerContentObserver("
+        errorLine2="                                      ~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java"
+            line="2470"
+            column="39"/>
+    </issue>
+
+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.registerContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.registerContentObserver()`"
+        errorLine1="        mContext.getContentResolver().registerContentObserver("
+        errorLine2="                                      ~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java"
+            line="3077"
+            column="39"/>
+    </issue>
+
+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.unregisterContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.unregisterContentObserver()`"
+        errorLine1="            mContext.getContentResolver().unregisterContentObserver(mDeviceProvisionedObserver);"
+        errorLine2="                                          ~~~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java"
+            line="3168"
+            column="43"/>
+    </issue>
+
+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.unregisterContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.unregisterContentObserver()`"
+        errorLine1="            mContext.getContentResolver().unregisterContentObserver(mDeviceProvisionedObserver);"
+        errorLine2="                                          ~~~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java"
+            line="3957"
+            column="43"/>
+    </issue>
+
+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.unregisterContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.unregisterContentObserver()`"
+        errorLine1="            mContext.getContentResolver().unregisterContentObserver(mTimeFormatChangeObserver);"
+        errorLine2="                                          ~~~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java"
+            line="3961"
+            column="43"/>
+    </issue>
+
+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.registerContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.registerContentObserver()`"
+        errorLine1="        contentResolver.registerContentObserver("
+        errorLine2="                        ~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/lockscreen/LockscreenSmartspaceController.kt"
+            line="486"
+            column="25"/>
+    </issue>
+
+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.registerContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.registerContentObserver()`"
+        errorLine1="        contentResolver.registerContentObserver("
+        errorLine2="                        ~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/lockscreen/LockscreenSmartspaceController.kt"
+            line="492"
+            column="25"/>
+    </issue>
+
+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.unregisterContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.unregisterContentObserver()`"
+        errorLine1="        contentResolver.unregisterContentObserver(settingsObserver)"
+        errorLine2="                        ~~~~~~~~~~~~~~~~~~~~~~~~~">
+        <location
+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/lockscreen/LockscreenSmartspaceController.kt"
+            line="543"
+            column="25"/>
+    </issue>
+
+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.registerContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.registerContentObserver()`"
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+        errorLine2="                        ~~~~~~~~~~~~~~~~~~~~~~~">
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+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/smartspace/filters/LockscreenTargetFilter.kt"
+            line="82"
+            column="25"/>
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+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.unregisterContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.unregisterContentObserver()`"
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+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/smartspace/filters/LockscreenTargetFilter.kt"
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+            column="25"/>
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+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.unregisterContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.unregisterContentObserver()`"
+        errorLine1="        mContext.getContentResolver().unregisterContentObserver(mMenuTargetFeaturesContentObserver);"
+        errorLine2="                                      ~~~~~~~~~~~~~~~~~~~~~~~~~">
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+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/accessibility/floatingmenu/MenuInfoRepository.java"
+            line="275"
+            column="39"/>
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+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.unregisterContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.unregisterContentObserver()`"
+        errorLine1="        mContext.getContentResolver().unregisterContentObserver(mMenuSizeContentObserver);"
+        errorLine2="                                      ~~~~~~~~~~~~~~~~~~~~~~~~~">
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+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/accessibility/floatingmenu/MenuInfoRepository.java"
+            line="276"
+            column="39"/>
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+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.unregisterContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.unregisterContentObserver()`"
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+        errorLine2="                                      ~~~~~~~~~~~~~~~~~~~~~~~~~">
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+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/accessibility/floatingmenu/MenuInfoRepository.java"
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+            column="39"/>
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+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.registerContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.registerContentObserver()`"
+        errorLine1="        mContext.getContentResolver().registerContentObserver(Global.getUriFor(Global.MOBILE_DATA),"
+        errorLine2="                                      ~~~~~~~~~~~~~~~~~~~~~~~">
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+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/connectivity/MobileSignalController.java"
+            line="200"
+            column="39"/>
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+    <issue
+        id="RegisterContentObserverViaContentResolver"
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+        errorLine2="                                      ~~~~~~~~~~~~~~~~~~~~~~~">
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+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/connectivity/MobileSignalController.java"
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+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.unregisterContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.unregisterContentObserver()`"
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+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/connectivity/MobileSignalController.java"
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+            column="39"/>
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+    <issue
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+        errorLine2="                                ~~~~~~~~~~~~~~~~~~~~~~~">
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+            column="33"/>
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+    <issue
+        id="RegisterContentObserverViaContentResolver"
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+        errorLine2="                         ~~~~~~~~~~~~~~~~~~~~~~~">
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+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/navigationbar/NavBarHelper.java"
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+            column="26"/>
+    </issue>
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+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.registerContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.registerContentObserver()`"
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+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.registerContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.registerContentObserver()`"
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+        errorLine2="                         ~~~~~~~~~~~~~~~~~~~~~~~">
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+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/navigationbar/NavBarHelper.java"
+            line="259"
+            column="26"/>
+    </issue>
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+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.registerContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.registerContentObserver()`"
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+        errorLine2="                         ~~~~~~~~~~~~~~~~~~~~~~~">
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+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/navigationbar/NavBarHelper.java"
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+            column="26"/>
+    </issue>
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+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.unregisterContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.unregisterContentObserver()`"
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+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/navigationbar/NavBarHelper.java"
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+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.registerContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.registerContentObserver()`"
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+        errorLine2="                                      ~~~~~~~~~~~~~~~~~~~~~~~">
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+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/NotificationLockscreenUserManagerImpl.java"
+            line="395"
+            column="39"/>
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+    <issue
+        id="RegisterContentObserverViaContentResolver"
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+        errorLine2="                                      ~~~~~~~~~~~~~~~~~~~~~~~">
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+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/NotificationLockscreenUserManagerImpl.java"
+            line="400"
+            column="39"/>
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+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.registerContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.registerContentObserver()`"
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+        errorLine2="                         ~~~~~~~~~~~~~~~~~~~~~~~">
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+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/shade/NotificationPanelViewController.java"
+            line="3675"
+            column="26"/>
+    </issue>
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+    <issue
+        id="RegisterContentObserverViaContentResolver"
+        message="`ContentResolver.unregisterContentObserver()` should be replaced with an appropriate interface API call, for eg.`&lt;SettingsProxy>/&lt;UserSettingsProxy>.unregisterContentObserver()`"
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+        errorLine2="                             ~~~~~~~~~~~~~~~~~~~~~~~~~">
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+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/shade/NotificationPanelViewController.java"
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+            column="30"/>
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+    <issue
+        id="RegisterContentObserverViaContentResolver"
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+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/power/PowerUI.java"
+            line="191"
+            column="18"/>
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+    <issue
+        id="RegisterContentObserverViaContentResolver"
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+    <issue
+        id="RegisterContentObserverViaContentResolver"
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+    <issue
+        id="RegisterContentObserverViaContentResolver"
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+        errorLine2="                                      ~~~~~~~~~~~~~~~~~~~~~~~">
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+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/qs/QSFooterView.java"
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+    <issue
+        id="RegisterContentObserverViaContentResolver"
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+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/qs/QSFooterView.java"
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+    <issue
+        id="RegisterContentObserverViaContentResolver"
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+            column="30"/>
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+    <issue
+        id="RegisterContentObserverViaContentResolver"
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+    <issue
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+        errorLine2="                             ~~~~~~~~~~~~~~~~~~~~~~~">
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+            column="30"/>
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+    <issue
+        id="RegisterContentObserverViaContentResolver"
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+    <issue
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+    <issue
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+    <issue
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+    <issue
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+    <issue
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+    <issue
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+            column="23"/>
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+    <issue
+        id="RegisterContentObserverViaContentResolver"
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+            file="frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/policy/ZenModeControllerImpl.java"
+            line="381"
+            column="23"/>
+    </issue>
+
 </issues>