Expand support for different screen sizes.

Applications can now declare that they support small, normal, or
large screens.  Resource selection can also be done based on these
sizes.  By default, pre-Donut apps are false for small and large,
and Donut or later apps are assumed to support all sizes.  In either
case they can use <supports-screens> in their manifest to declare
what they actually support.

1 files changed, 39 insertions, 0 deletions

diff --git a/tools/aapt/Command.cpp b/tools/aapt/Command.cpp
index 503f66157e62..e04491d93b86 100644
--- a/tools/aapt/Command.cpp
+++ b/tools/aapt/Command.cpp
@@ -329,6 +329,9 @@ enum {
     TARGET_SDK_VERSION_ATTR = 0x01010270,
     TEST_ONLY_ATTR = 0x01010272,
     DENSITY_ATTR = 0x0101026c,
+    SMALL_SCREEN_ATTR = 0x01010284,
+    NORMAL_SCREEN_ATTR = 0x01010285,
+    LARGE_SCREEN_ATTR = 0x01010286,
 };
 
 const char *getComponentName(String8 &pkgName, String8 &componentName) {
@@ -499,6 +502,10 @@ int doDump(Bundle* bundle)
             bool isLauncherActivity = false;
             bool withinApplication = false;
             bool withinReceiver = false;
+            int targetSdk = 0;
+            int smallScreen = 1;
+            int normalScreen = 1;
+            int largeScreen = 1;
             String8 pkg;
             String8 activityName;
             String8 activityLabel;
@@ -572,8 +579,10 @@ int doDump(Bundle* bundle)
                                         error.string());
                                 goto bail;
                             }
+                            if (name == "Donut") targetSdk = 4;
                             printf("sdkVersion:'%s'\n", name.string());
                         } else if (code != -1) {
+                            targetSdk = code;
                             printf("sdkVersion:'%d'\n", code);
                         }
                         code = getIntegerAttribute(tree, TARGET_SDK_VERSION_ATTR, &error);
@@ -585,8 +594,12 @@ int doDump(Bundle* bundle)
                                         error.string());
                                 goto bail;
                             }
+                            if (name == "Donut" && targetSdk < 4) targetSdk = 4;
                             printf("targetSdkVersion:'%s'\n", name.string());
                         } else if (code != -1) {
+                            if (targetSdk < code) {
+                                targetSdk = code;
+                            }
                             printf("targetSdkVersion:'%d'\n", code);
                         }
                     } else if (tag == "uses-configuration") {
@@ -625,6 +638,13 @@ int doDump(Bundle* bundle)
                             goto bail;
                         }
                         printf("supports-density:'%d'\n", dens);
+                    } else if (tag == "supports-screens") {
+                        smallScreen = getIntegerAttribute(tree,
+                                SMALL_SCREEN_ATTR, NULL, 1);
+                        normalScreen = getIntegerAttribute(tree,
+                                NORMAL_SCREEN_ATTR, NULL, 1);
+                        largeScreen = getIntegerAttribute(tree,
+                                LARGE_SCREEN_ATTR, NULL, 1);
                     }
                 } else if (depth == 3 && withinApplication) {
                     withinActivity = false;
@@ -733,6 +753,25 @@ int doDump(Bundle* bundle)
                 }
             }
             
+            // Determine default values for any unspecified screen sizes,
+            // based on the target SDK of the package.  As of 4 (donut)
+            // the screen size support was introduced, so all default to
+            // enabled.
+            if (smallScreen > 0) {
+                smallScreen = targetSdk >= 4 ? -1 : 0;
+            }
+            if (normalScreen > 0) {
+                normalScreen = -1;
+            }
+            if (largeScreen > 0) {
+                largeScreen = targetSdk >= 4 ? -1 : 0;
+            }
+            printf("supports-screens:");
+            if (smallScreen != 0) printf(" 'small'");
+            if (normalScreen != 0) printf(" 'normal'");
+            if (largeScreen != 0) printf(" 'large'");
+            printf("\n");
+            
             printf("locales:");
             Vector<String8> locales;
             res.getLocales(&locales);