blob: bb123b69bae6722f7e372d6702cf11e991c3323b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
/*
* Copyright (C) 2020 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.documentsui;
import android.os.Looper;
/** Class for handler/thread utils. */
public final class ThreadHelper {
private ThreadHelper() {
}
static final String MUST_NOT_ON_MAIN_THREAD_MSG =
"This method should not be called on main thread.";
static final String MUST_ON_MAIN_THREAD_MSG =
"This method should only be called on main thread.";
/** Verifies that current thread is not the UI thread. */
public static void assertNotOnMainThread() {
if (Looper.getMainLooper().getThread() == Thread.currentThread()) {
fatalAssert(MUST_NOT_ON_MAIN_THREAD_MSG);
}
}
/** Verifies that current thread is the UI thread. */
public static void assertOnMainThread() {
if (Looper.getMainLooper().getThread() != Thread.currentThread()) {
fatalAssert(MUST_ON_MAIN_THREAD_MSG);
}
}
/**
* Exceptions thrown in background threads are silently swallowed on Android. Use the
* uncaught exception handler of the UI thread to force the app to crash.
*/
public static void fatalAssert(final String message) {
crashMainThread(new AssertionError(message));
}
private static void crashMainThread(Throwable t) {
Thread.UncaughtExceptionHandler uiThreadExceptionHandler =
Looper.getMainLooper().getThread().getUncaughtExceptionHandler();
uiThreadExceptionHandler.uncaughtException(Thread.currentThread(), t);
}
}
|