android.view.Display#DEFAULT_DISPLAY源码实例Demo

@Override
public Context createApplicationContext(ApplicationInfo application, int flags)
        throws NameNotFoundException {
    LoadedApk pi = mMainThread.getPackageInfo(application, mResources.getCompatibilityInfo(),
            flags | CONTEXT_REGISTER_PACKAGE);
    if (pi != null) {
        ContextImpl c = new ContextImpl(this, mMainThread, pi, null, mActivityToken,
                new UserHandle(UserHandle.getUserId(application.uid)), flags, null);

        final int displayId = mDisplay != null
                ? mDisplay.getDisplayId() : Display.DEFAULT_DISPLAY;

        c.setResources(createResources(mActivityToken, pi, null, displayId, null,
                getDisplayAdjustments(displayId).getCompatibilityInfo()));
        if (c.mResources != null) {
            return c;
        }
    }

    throw new PackageManager.NameNotFoundException(
            "Application package " + application.packageName + " not found");
}
 

@Override
public Context createConfigurationContext(Configuration overrideConfiguration) {
    if (overrideConfiguration == null) {
        throw new IllegalArgumentException("overrideConfiguration must not be null");
    }

    ContextImpl context = new ContextImpl(this, mMainThread, mPackageInfo, mSplitName,
            mActivityToken, mUser, mFlags, mClassLoader);

    final int displayId = mDisplay != null ? mDisplay.getDisplayId() : Display.DEFAULT_DISPLAY;
    context.setResources(createResources(mActivityToken, mPackageInfo, mSplitName, displayId,
            overrideConfiguration, getDisplayAdjustments(displayId).getCompatibilityInfo()));
    return context;
}
 

public static boolean isDesktopModeActive(Context context) {
    boolean desktopModePrefEnabled;

    try {
        desktopModePrefEnabled = Settings.Global.getInt(context.getContentResolver(), "force_desktop_mode_on_external_displays") == 1;
    } catch (Settings.SettingNotFoundException e) {
        desktopModePrefEnabled = false;
    }

    return desktopModePrefEnabled && getExternalDisplayID(context) != Display.DEFAULT_DISPLAY;
}
 

@Override
public void onDisplayRemoved(int displayId) {
    DisplayManager dm = (DisplayManager) getSystemService(DISPLAY_SERVICE);
    Display[] displays = dm.getDisplays();

    try {
        if(displays[displays.length - 1].getDisplayId() == Display.DEFAULT_DISPLAY) {
            Intent serviceIntent = new Intent(NotificationService.this, TempBacklightOnService.class);
            U.startService(NotificationService.this, serviceIntent);

            SharedPreferences prefMain = U.getPrefMain(NotificationService.this);
            ActivityManager manager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
            boolean displayConnectionServiceRunning = false;

            for(ActivityManager.RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE)) {
                if(DisplayConnectionService.class.getName().equals(service.service.getClassName()))
                    displayConnectionServiceRunning = true;
            }

            if(prefMain.getBoolean("inactive", true) && !displayConnectionServiceRunning) {
                Intent turnOffIntent = new Intent(NotificationService.this, TurnOffActivity.class);
                turnOffIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                startActivity(turnOffIntent);
            }
        }
    } catch (ArrayIndexOutOfBoundsException e) { /* Gracefully fail */ }
}
 

@Override
public Context createContextForSplit(String splitName) throws NameNotFoundException {
    if (!mPackageInfo.getApplicationInfo().requestsIsolatedSplitLoading()) {
        // All Splits are always loaded.
        return this;
    }

    final ClassLoader classLoader = mPackageInfo.getSplitClassLoader(splitName);
    final String[] paths = mPackageInfo.getSplitPaths(splitName);

    final ContextImpl context = new ContextImpl(this, mMainThread, mPackageInfo, splitName,
            mActivityToken, mUser, mFlags, classLoader);

    final int displayId = mDisplay != null
            ? mDisplay.getDisplayId() : Display.DEFAULT_DISPLAY;

    context.setResources(ResourcesManager.getInstance().getResources(
            mActivityToken,
            mPackageInfo.getResDir(),
            paths,
            mPackageInfo.getOverlayDirs(),
            mPackageInfo.getApplicationInfo().sharedLibraryFiles,
            displayId,
            null,
            mPackageInfo.getCompatibilityInfo(),
            classLoader));
    return context;
}
 

@Override
public Context createConfigurationContext(Configuration overrideConfiguration) {
    if (overrideConfiguration == null) {
        throw new IllegalArgumentException("overrideConfiguration must not be null");
    }

    ContextImpl context = new ContextImpl(this, mMainThread, mPackageInfo, mSplitName,
            mActivityToken, mUser, mFlags, mClassLoader);

    final int displayId = mDisplay != null ? mDisplay.getDisplayId() : Display.DEFAULT_DISPLAY;
    context.setResources(createResources(mActivityToken, mPackageInfo, mSplitName, displayId,
            overrideConfiguration, getDisplayAdjustments(displayId).getCompatibilityInfo()));
    return context;
}
 

@Override
public Context createPackageContextAsUser(String packageName, int flags, UserHandle user)
        throws NameNotFoundException {
    if (packageName.equals("system") || packageName.equals("android")) {
        // The system resources are loaded in every application, so we can safely copy
        // the context without reloading Resources.
        return new ContextImpl(this, mMainThread, mPackageInfo, null, mActivityToken, user,
                flags, null);
    }

    LoadedApk pi = mMainThread.getPackageInfo(packageName, mResources.getCompatibilityInfo(),
            flags | CONTEXT_REGISTER_PACKAGE, user.getIdentifier());
    if (pi != null) {
        ContextImpl c = new ContextImpl(this, mMainThread, pi, null, mActivityToken, user,
                flags, null);

        final int displayId = mDisplay != null
                ? mDisplay.getDisplayId() : Display.DEFAULT_DISPLAY;

        c.setResources(createResources(mActivityToken, pi, null, displayId, null,
                getDisplayAdjustments(displayId).getCompatibilityInfo()));
        if (c.mResources != null) {
            return c;
        }
    }

    // Should be a better exception.
    throw new PackageManager.NameNotFoundException(
            "Application package " + packageName + " not found");
}
 

private int getDisplayId() {
    return mDisplay != null ? mDisplay.getDisplayId() : Display.DEFAULT_DISPLAY;
}
 

InputConsumerImpl(WindowManagerService service, IBinder token, String name,
        InputChannel inputChannel, int clientPid, UserHandle clientUser) {
    mService = service;
    mToken = token;
    mName = name;
    mClientPid = clientPid;
    mClientUser = clientUser;

    InputChannel[] channels = InputChannel.openInputChannelPair(name);
    mServerChannel = channels[0];
    if (inputChannel != null) {
        channels[1].transferTo(inputChannel);
        channels[1].dispose();
        mClientChannel = inputChannel;
    } else {
        mClientChannel = channels[1];
    }
    mService.mInputManager.registerInputChannel(mServerChannel, null);

    mApplicationHandle = new InputApplicationHandle(null);
    mApplicationHandle.name = name;
    mApplicationHandle.dispatchingTimeoutNanos =
            WindowManagerService.DEFAULT_INPUT_DISPATCHING_TIMEOUT_NANOS;

    mWindowHandle = new InputWindowHandle(mApplicationHandle, null, null,
            Display.DEFAULT_DISPLAY);
    mWindowHandle.name = name;
    mWindowHandle.inputChannel = mServerChannel;
    mWindowHandle.layoutParamsType = WindowManager.LayoutParams.TYPE_INPUT_CONSUMER;
    mWindowHandle.layer = getLayerLw(mWindowHandle.layoutParamsType);
    mWindowHandle.layoutParamsFlags = 0;
    mWindowHandle.dispatchingTimeoutNanos =
            WindowManagerService.DEFAULT_INPUT_DISPATCHING_TIMEOUT_NANOS;
    mWindowHandle.visible = true;
    mWindowHandle.canReceiveKeys = false;
    mWindowHandle.hasFocus = false;
    mWindowHandle.hasWallpaper = false;
    mWindowHandle.paused = false;
    mWindowHandle.ownerPid = Process.myPid();
    mWindowHandle.ownerUid = Process.myUid();
    mWindowHandle.inputFeatures = 0;
    mWindowHandle.scaleFactor = 1.0f;
}
 

private void initialize() {
    // Initialize the power state object for the default display.
    // In the future, we might manage multiple displays independently.
    mPowerState = new DisplayPowerState(mBlanker,
            mColorFadeEnabled ? new ColorFade(Display.DEFAULT_DISPLAY) : null);

    if (mColorFadeEnabled) {
        mColorFadeOnAnimator = ObjectAnimator.ofFloat(
                mPowerState, DisplayPowerState.COLOR_FADE_LEVEL, 0.0f, 1.0f);
        mColorFadeOnAnimator.setDuration(COLOR_FADE_ON_ANIMATION_DURATION_MILLIS);
        mColorFadeOnAnimator.addListener(mAnimatorListener);

        mColorFadeOffAnimator = ObjectAnimator.ofFloat(
                mPowerState, DisplayPowerState.COLOR_FADE_LEVEL, 1.0f, 0.0f);
        mColorFadeOffAnimator.setDuration(COLOR_FADE_OFF_ANIMATION_DURATION_MILLIS);
        mColorFadeOffAnimator.addListener(mAnimatorListener);
    }

    mScreenBrightnessRampAnimator = new RampAnimator<DisplayPowerState>(
            mPowerState, DisplayPowerState.SCREEN_BRIGHTNESS);
    mScreenBrightnessRampAnimator.setListener(mRampAnimatorListener);

    // Initialize screen state for battery stats.
    try {
        mBatteryStats.noteScreenState(mPowerState.getScreenState());
        mBatteryStats.noteScreenBrightness(mPowerState.getScreenBrightness());
    } catch (RemoteException ex) {
        // same process
    }

    // Initialize all of the brightness tracking state
    final float brightness = convertToNits(mPowerState.getScreenBrightness());
    if (brightness >= 0.0f) {
        mBrightnessTracker.start(brightness);
    }

    mContext.getContentResolver().registerContentObserver(
            Settings.System.getUriFor(Settings.System.SCREEN_BRIGHTNESS),
            false /*notifyForDescendants*/, mSettingsObserver, UserHandle.USER_ALL);
    mContext.getContentResolver().registerContentObserver(
            Settings.System.getUriFor(Settings.System.SCREEN_BRIGHTNESS_FOR_VR),
            false /*notifyForDescendants*/, mSettingsObserver, UserHandle.USER_ALL);
    mContext.getContentResolver().registerContentObserver(
            Settings.System.getUriFor(Settings.System.SCREEN_AUTO_BRIGHTNESS_ADJ),
            false /*notifyForDescendants*/, mSettingsObserver, UserHandle.USER_ALL);
}
 

@UnsupportedAppUsage
static ContextImpl createActivityContext(ActivityThread mainThread,
        LoadedApk packageInfo, ActivityInfo activityInfo, IBinder activityToken, int displayId,
        Configuration overrideConfiguration) {
    if (packageInfo == null) throw new IllegalArgumentException("packageInfo");

    String[] splitDirs = packageInfo.getSplitResDirs();
    ClassLoader classLoader = packageInfo.getClassLoader();

    if (packageInfo.getApplicationInfo().requestsIsolatedSplitLoading()) {
        Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, "SplitDependencies");
        try {
            classLoader = packageInfo.getSplitClassLoader(activityInfo.splitName);
            splitDirs = packageInfo.getSplitPaths(activityInfo.splitName);
        } catch (NameNotFoundException e) {
            // Nothing above us can handle a NameNotFoundException, better crash.
            throw new RuntimeException(e);
        } finally {
            Trace.traceEnd(Trace.TRACE_TAG_RESOURCES);
        }
    }

    ContextImpl context = new ContextImpl(null, mainThread, packageInfo, activityInfo.splitName,
            activityToken, null, 0, classLoader, null);

    // Clamp display ID to DEFAULT_DISPLAY if it is INVALID_DISPLAY.
    displayId = (displayId != Display.INVALID_DISPLAY) ? displayId : Display.DEFAULT_DISPLAY;

    final CompatibilityInfo compatInfo = (displayId == Display.DEFAULT_DISPLAY)
            ? packageInfo.getCompatibilityInfo()
            : CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO;

    final ResourcesManager resourcesManager = ResourcesManager.getInstance();

    // Create the base resources for which all configuration contexts for this Activity
    // will be rebased upon.
    context.setResources(resourcesManager.createBaseActivityResources(activityToken,
            packageInfo.getResDir(),
            splitDirs,
            packageInfo.getOverlayDirs(),
            packageInfo.getApplicationInfo().sharedLibraryFiles,
            displayId,
            overrideConfiguration,
            compatInfo,
            classLoader));
    context.mDisplay = resourcesManager.getAdjustedDisplay(displayId,
            context.getResources());
    return context;
}
 

static ContextImpl createActivityContext(ActivityThread mainThread,
        LoadedApk packageInfo, ActivityInfo activityInfo, IBinder activityToken, int displayId,
        Configuration overrideConfiguration) {
    if (packageInfo == null) throw new IllegalArgumentException("packageInfo");

    String[] splitDirs = packageInfo.getSplitResDirs();
    ClassLoader classLoader = packageInfo.getClassLoader();

    if (packageInfo.getApplicationInfo().requestsIsolatedSplitLoading()) {
        Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, "SplitDependencies");
        try {
            classLoader = packageInfo.getSplitClassLoader(activityInfo.splitName);
            splitDirs = packageInfo.getSplitPaths(activityInfo.splitName);
        } catch (NameNotFoundException e) {
            // Nothing above us can handle a NameNotFoundException, better crash.
            throw new RuntimeException(e);
        } finally {
            Trace.traceEnd(Trace.TRACE_TAG_RESOURCES);
        }
    }

    ContextImpl context = new ContextImpl(null, mainThread, packageInfo, activityInfo.splitName,
            activityToken, null, 0, classLoader);

    // Clamp display ID to DEFAULT_DISPLAY if it is INVALID_DISPLAY.
    displayId = (displayId != Display.INVALID_DISPLAY) ? displayId : Display.DEFAULT_DISPLAY;

    final CompatibilityInfo compatInfo = (displayId == Display.DEFAULT_DISPLAY)
            ? packageInfo.getCompatibilityInfo()
            : CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO;

    final ResourcesManager resourcesManager = ResourcesManager.getInstance();

    // Create the base resources for which all configuration contexts for this Activity
    // will be rebased upon.
    context.setResources(resourcesManager.createBaseActivityResources(activityToken,
            packageInfo.getResDir(),
            splitDirs,
            packageInfo.getOverlayDirs(),
            packageInfo.getApplicationInfo().sharedLibraryFiles,
            displayId,
            overrideConfiguration,
            compatInfo,
            classLoader));
    context.mDisplay = resourcesManager.getAdjustedDisplay(displayId,
            context.getResources());
    return context;
}
 

private int getDisplayId() {
    return mDisplay != null ? mDisplay.getDisplayId() : Display.DEFAULT_DISPLAY;
}
 

private ContextImpl(ContextImpl container, ActivityThread mainThread,
        LoadedApk packageInfo, IBinder activityToken, UserHandle user, boolean restricted,
        Display display, Configuration overrideConfiguration, int createDisplayWithId) {
    mOuterContext = this;

    mMainThread = mainThread;
    mActivityToken = activityToken;
    mRestricted = restricted;

    if (user == null) {
        user = Process.myUserHandle();
    }
    mUser = user;

    mPackageInfo = packageInfo;
    mResourcesManager = ResourcesManager.getInstance();

    final int displayId = (createDisplayWithId != Display.INVALID_DISPLAY)
            ? createDisplayWithId
            : (display != null) ? display.getDisplayId() : Display.DEFAULT_DISPLAY;

    CompatibilityInfo compatInfo = null;
    if (container != null) {
        compatInfo = container.getDisplayAdjustments(displayId).getCompatibilityInfo();
    }
    if (compatInfo == null) {
        compatInfo = (displayId == Display.DEFAULT_DISPLAY)
                ? packageInfo.getCompatibilityInfo()
                : CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO;
    }
    mDisplayAdjustments.setCompatibilityInfo(compatInfo);
    mDisplayAdjustments.setConfiguration(overrideConfiguration);

    mDisplay = (createDisplayWithId == Display.INVALID_DISPLAY) ? display
            : ResourcesManager.getInstance().getAdjustedDisplay(displayId, mDisplayAdjustments);

    Resources resources = packageInfo.getResources(mainThread);
    if (resources != null) {
        if (displayId != Display.DEFAULT_DISPLAY
                || overrideConfiguration != null
                || (compatInfo != null && compatInfo.applicationScale
                        != resources.getCompatibilityInfo().applicationScale)) {
            resources = mResourcesManager.getTopLevelResources(packageInfo.getResDir(),
                    packageInfo.getSplitResDirs(), packageInfo.getOverlayDirs(),
                    packageInfo.getApplicationInfo().sharedLibraryFiles, displayId,
                    overrideConfiguration, compatInfo);
        }
    }
    mResources = resources;

    if (container != null) {
        mBasePackageName = container.mBasePackageName;
        mOpPackageName = container.mOpPackageName;
    } else {
        mBasePackageName = packageInfo.mPackageName;
        ApplicationInfo ainfo = packageInfo.getApplicationInfo();
        if (ainfo.uid == Process.SYSTEM_UID && ainfo.uid != Process.myUid()) {
            // Special case: system components allow themselves to be loaded in to other
            // processes.  For purposes of app ops, we must then consider the context as
            // belonging to the package of this process, not the system itself, otherwise
            // the package+uid verifications in app ops will fail.
            mOpPackageName = ActivityThread.currentPackageName();
        } else {
            mOpPackageName = mBasePackageName;
        }
    }

    mContentResolver = new ApplicationContentResolver(this, mainThread, user);
}
 

@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
       final int length = appWidgetIds.length;

       for (int i = 0; i < length; i++) {
           int appWidgetId = appWidgetIds[i];

           Intent intent = new Intent(context, MainActivity.class);
           intent.putExtra(MainActivity.EXTRA_WIDGET_LAUNCH, true);
           PendingIntent pendingIntent = PendingIntent.getActivity(context, 0,
                                                   intent, PendingIntent.FLAG_UPDATE_CURRENT);

           final RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.miracast_widget);
           views.setOnClickPendingIntent(R.id.widget_layout_parent, pendingIntent);
           final DisplayManager displayManager = (DisplayManager) context.getSystemService(Context.DISPLAY_SERVICE);

           Display[] displays = displayManager.getDisplays();
           boolean displaySet = false;
           int currentDisplay = -1;
           for(int j = 0; j < displays.length; j++){
           	Display display = displays[j];
           	if(display.getDisplayId() != Display.DEFAULT_DISPLAY){
                   views.setTextViewText(R.id.widget_text, display.getName());
                   views.setTextColor(R.id.widget_text, context.getResources().getColor(android.R.color.holo_blue_bright));
                   currentDisplay = display.getDisplayId();
                   displaySet = true;

                   // Track this
                   MiracastApplication application
                           = (MiracastApplication) context.getApplicationContext();
                   Tracker tracker = application.getDefaultTracker();
                   sendEventDisplayFound(tracker);
           	}
           }
           
           if(!displaySet){
               views.setTextViewText(R.id.widget_text, "Cast Screen");
               views.setTextColor(R.id.widget_text, context.getResources().getColor(android.R.color.white));
           }

           MiracastDisplayListener displayListener = new MiracastDisplayListener(currentDisplay, views, displayManager, appWidgetManager, appWidgetId, context);
           displayManager.registerDisplayListener(displayListener, null);

           // Tell the AppWidgetManager to perform an update on the current app widget
           appWidgetManager.updateAppWidget(appWidgetId, views);
       }
   }
 

private static int getDisplayID(String[] commandArgs) {
    if(commandArgs.length < 5 || !commandArgs[commandArgs.length - 2].equals("-d"))
        return Display.DEFAULT_DISPLAY;

    return Integer.parseInt(commandArgs[commandArgs.length - 1]);
}
 

private void handleLogicalDisplayChanged(int displayId, @NonNull LogicalDisplay display) {
    if (displayId == Display.DEFAULT_DISPLAY) {
        recordTopInsetLocked(display);
    }
    sendDisplayEventLocked(displayId, DisplayManagerGlobal.EVENT_DISPLAY_CHANGED);
}
 

private int getDisplayId() {
    return mDisplay != null ? mDisplay.getDisplayId() : Display.DEFAULT_DISPLAY;
}
 

static ContextImpl createActivityContext(ActivityThread mainThread,
        LoadedApk packageInfo, ActivityInfo activityInfo, IBinder activityToken, int displayId,
        Configuration overrideConfiguration) {
    if (packageInfo == null) throw new IllegalArgumentException("packageInfo");

    String[] splitDirs = packageInfo.getSplitResDirs();
    ClassLoader classLoader = packageInfo.getClassLoader();

    if (packageInfo.getApplicationInfo().requestsIsolatedSplitLoading()) {
        Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, "SplitDependencies");
        try {
            classLoader = packageInfo.getSplitClassLoader(activityInfo.splitName);
            splitDirs = packageInfo.getSplitPaths(activityInfo.splitName);
        } catch (NameNotFoundException e) {
            // Nothing above us can handle a NameNotFoundException, better crash.
            throw new RuntimeException(e);
        } finally {
            Trace.traceEnd(Trace.TRACE_TAG_RESOURCES);
        }
    }

    ContextImpl context = new ContextImpl(null, mainThread, packageInfo, activityInfo.splitName,
            activityToken, null, 0, classLoader);

    // Clamp display ID to DEFAULT_DISPLAY if it is INVALID_DISPLAY.
    displayId = (displayId != Display.INVALID_DISPLAY) ? displayId : Display.DEFAULT_DISPLAY;

    final CompatibilityInfo compatInfo = (displayId == Display.DEFAULT_DISPLAY)
            ? packageInfo.getCompatibilityInfo()
            : CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO;

    final ResourcesManager resourcesManager = ResourcesManager.getInstance();

    // Create the base resources for which all configuration contexts for this Activity
    // will be rebased upon.
    context.setResources(resourcesManager.createBaseActivityResources(activityToken,
            packageInfo.getResDir(),
            splitDirs,
            packageInfo.getOverlayDirs(),
            packageInfo.getApplicationInfo().sharedLibraryFiles,
            displayId,
            overrideConfiguration,
            compatInfo,
            classLoader));
    context.mDisplay = resourcesManager.getAdjustedDisplay(displayId,
            context.getResources());
    return context;
}
 

public static boolean isDesktopModeActive(Context context) {
    return isDesktopModePrefEnabled(context) && getExternalDisplayID(context) != Display.DEFAULT_DISPLAY;
}