Class ActivityThread

frameworks/base/core/java/android/app/ActivityThread.java:189–6177

This manages the execution of the main thread in an application process, scheduling and executing activities, broadcasts, and other operations on it as the activity manager requests. {@hide}

 * {@hide}
 */
public final class ActivityThread {
    /** @hide */
    public static final String TAG = "ActivityThread";
    private static final android.graphics.Bitmap.Config THUMBNAIL_FORMAT = Bitmap.Config.RGB_565;
    static final boolean localLOGV = false;
    static final boolean DEBUG_MESSAGES = false;
    /** @hide */
    public static final boolean DEBUG_BROADCAST = false;
    private static final boolean DEBUG_RESULTS = false;
    private static final boolean DEBUG_BACKUP = false;
    public static final boolean DEBUG_CONFIGURATION = false;
    private static final boolean DEBUG_SERVICE = false;
    private static final boolean DEBUG_MEMORY_TRIM = false;
    private static final boolean DEBUG_PROVIDER = false;
    private static final boolean DEBUG_ORDER = false;
    private static final long MIN_TIME_BETWEEN_GCS = 5*1000;
    private static final int SQLITE_MEM_RELEASED_EVENT_LOG_TAG = 75003;
    private static final int LOG_AM_ON_PAUSE_CALLED = 30021;
    private static final int LOG_AM_ON_RESUME_CALLED = 30022;
    private static final int LOG_AM_ON_STOP_CALLED = 30049;

    /** Type for IActivityManager.serviceDoneExecuting: anonymous operation */
    public static final int SERVICE_DONE_EXECUTING_ANON = 0;
    /** Type for IActivityManager.serviceDoneExecuting: done with an onStart call */
    public static final int SERVICE_DONE_EXECUTING_START = 1;
    /** Type for IActivityManager.serviceDoneExecuting: done stopping (destroying) service */
    public static final int SERVICE_DONE_EXECUTING_STOP = 2;

    // Details for pausing activity.
    private static final int USER_LEAVING = 1;
    private static final int DONT_REPORT = 2;

    // Whether to invoke an activity callback after delivering new configuration.
    private static final boolean REPORT_TO_ACTIVITY = true;

    private ContextImpl mSystemContext;

    static volatile IPackageManager sPackageManager;

    final ApplicationThread mAppThread = new ApplicationThread();
    final Looper mLooper = Looper.myLooper();
    final H mH = new H();
    final ArrayMap<IBinder, ActivityClientRecord> mActivities = new ArrayMap<>();
    // List of new activities (via ActivityRecord.nextIdle) that should
    // be reported when next we idle.
    ActivityClientRecord mNewActivities = null;
    // Number of activities that are currently visible on-screen.
    int mNumVisibleActivities = 0;
    ArrayList<WeakReference<AssistStructure>> mLastAssistStructures = new ArrayList<>();
    private int mLastSessionId;
    final ArrayMap<IBinder, Service> mServices = new ArrayMap<>();
    AppBindData mBoundApplication;
    Profiler mProfiler;
    int mCurDefaultDisplayDpi;
    boolean mDensityCompatMode;
    Configuration mConfiguration;
    Configuration mCompatConfiguration;
    Application mInitialApplication;