效果图
布局文件-Android 9
frameworks/base/core/res/res/layout/decor_caption.xml
<?xml version="1.0" encoding="utf-8"?>
<com.android.internal.widget.DecorCaptionView xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:descendantFocusability="beforeDescendants" >
<LinearLayout
android:id="@+id/caption"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="end"
android:background="@drawable/decor_caption_title"
android:focusable="false"
android:descendantFocusability="blocksDescendants" >
<Button
android:id="@+id/maximize_window"
android:layout_width="32dp"
android:layout_height="32dp"
android:layout_margin="5dp"
android:padding="4dp"
android:layout_gravity="center_vertical|end"
android:contentDescription="@string/maximize_button_text"
android:background="@drawable/decor_maximize_button_dark" />
<Button
android:id="@+id/close_window"
android:layout_width="32dp"
android:layout_height="32dp"
android:layout_margin="5dp"
android:padding="4dp"
android:layout_gravity="center_vertical|end"
android:contentDescription="@string/close_button_text"
android:background="@drawable/decor_close_button_dark" />
</LinearLayout>
</com.android.internal.widget.DecorCaptionView>
DecorCaptionView
public class DecorCaptionView extends ViewGroup implements View.OnTouchListener,
GestureDetector.OnGestureListener {
private PhoneWindow mOwner = null;
private View mCaption;
private View mContent;
// 最大化窗口
private View mMaximize;
// 关闭窗口
private View mClose;
public void setPhoneWindow(PhoneWindow owner, boolean show) {
mMaximize = findViewById(R.id.maximize_window);
mClose = findViewById(R.id.close_window);
}
@Override
public void addView(View child, int index, ViewGroup.LayoutParams params) {
mContent = child;
}
/**
* Maximize the window by moving it to the maximized workspace stack.
**/
private void maximizeWindow() {
Window.WindowControllerCallback callback = mOwner.getWindowControllerCallback();
if (callback != null) {
try {
callback.exitFreeformMode();
} catch (RemoteException ex) {
Log.e(TAG, "Cannot change task workspace.");
}
}
}
@Override
public boolean onSingleTapUp(MotionEvent e) {
if (mClickTarget == mMaximize) {
maximizeWindow();
} else if (mClickTarget == mClose) {
mOwner.dispatchOnWindowDismissed(
true /*finishTask*/, false /*suppressWindowTransition*/);
}
return true;
}
}
事件处理trace
1970-03-20 04:22:43.907 5227-5227/com.android.calculator2 D/WWW: maximizeWindow:
java.lang.Throwable
at com.android.internal.widget.DecorCaptionView.maximizeWindow(DecorCaptionView.java:347)
at com.android.internal.widget.DecorCaptionView.onSingleTapUp(DecorCaptionView.java:412)
at android.view.GestureDetector.onTouchEvent(GestureDetector.java:641)
at com.android.internal.widget.DecorCaptionView.onTouchEvent(DecorCaptionView.java:170)
at android.view.View.dispatchTouchEvent(View.java:12514)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3024)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2705)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3030)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:440)
at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1830)
at android.app.Activity.dispatchTouchEvent(Activity.java:3401)
at com.android.calculator2.Calculator.dispatchTouchEvent(Calculator.java:598)
at android.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:53)
at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:398)
at android.view.View.dispatchPointerEvent(View.java:12753)
at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:5122)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4925)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4442)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4495)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4461)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4601)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4469)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4658)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4442)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4495)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4461)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4469)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4442)
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:7117)
at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:7086)
at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:7047)
at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:7220)
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:187)
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:326)
at android.os.Looper.loop(Looper.java:160)
at android.app.ActivityThread.main(ActivityThread.java:6746)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
AMS
public class ActivityManagerService extends IActivityManager.Stub
implements Watchdog.Monitor, BatteryStatsImpl.BatteryCallback {
@Override
public void exitFreeformMode(IBinder token) throws RemoteException {
synchronized (this) {
long ident = Binder.clearCallingIdentity();
try {
final ActivityRecord r = ActivityRecord.forTokenLocked(token);
if (r == null) {
throw new IllegalArgumentException(
"exitFreeformMode: No activity record matching token=" + token);
}
final ActivityStack stack = r.getStack();
if (stack == null || !stack.inFreeformWindowingMode()) {
throw new IllegalStateException(
"exitFreeformMode: You can only go fullscreen from freeform.");
}
stack.setWindowingMode(WINDOWING_MODE_FULLSCREEN);
} finally {
Binder.restoreCallingIdentity(ident);
}
}
}
}
窗口大小变更
服务端
1970-03-20 05:47:11.109 1448-1618/system_process D/WWW: ActivityRecord scheduleConfigurationChanged:
java.lang.Throwable
at com.android.server.am.ActivityRecord.scheduleConfigurationChanged(ActivityRecord.java:654)
at com.android.server.am.ActivityRecord.ensureActivityConfiguration(ActivityRecord.java:2538)
at com.android.server.am.ActivityRecord.ensureActivityConfiguration(ActivityRecord.java:2436)
at com.android.server.am.TaskRecord.resize(TaskRecord.java:561)
at com.android.server.am.ActivityManagerService.resizeTask(ActivityManagerService.java:11037)
at com.android.server.wm.TaskPositioner$WindowPositionerEventReceiver.onInputEvent(TaskPositioner.java:168)
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:187)
at android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(Native Method)
at android.view.InputEventReceiver.consumeBatchedInputEvents(InputEventReceiver.java:178)
at android.view.BatchedInputEventReceiver.doConsumeBatchedInput(BatchedInputEventReceiver.java:49)
at android.view.BatchedInputEventReceiver$BatchedInputRunnable.run(BatchedInputEventReceiver.java:78)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1012)
at android.view.Choreographer.doCallbacks(Choreographer.java:823)
at android.view.Choreographer.doFrame(Choreographer.java:752)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:998)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:193)
at android.os.HandlerThread.run(HandlerThread.java:65)
at com.android.server.ServiceThread.run(ServiceThread.java:
ActivityRecord
final class ActivityRecord extends ConfigurationContainer implements AppWindowContainerListener {
private void scheduleConfigurationChanged(Configuration config) {
if (app == null || app.thread == null) {
if (DEBUG_CONFIGURATION) Slog.w(TAG,
"Can't report activity configuration update - client not running"
+ ", activityRecord=" + this);
return;
}
try {
if (DEBUG_CONFIGURATION) Slog.v(TAG, "Sending new config to " + this + ", config: "
+ config);
// Binder 调用到客户端
service.getLifecycleManager().scheduleTransaction(app.thread, appToken,
ActivityConfigurationChangeItem.obtain(config));
} catch (RemoteException e) {
// If process died, whatever.
}
}
}
客户端Trace
// 1
1970-03-20 05:47:11.219 3726-3726/com.android.calculator2 D/WWW: Activity onConfigurationChanged:
java.lang.Throwable
at android.app.Activity.onConfigurationChanged(Activity.java:2271)
at android.app.ActivityThread.performActivityConfigurationChanged(ActivityThread.java:5070)
at android.app.ActivityThread.performConfigurationChangedForActivity(ActivityThread.java:4937)
at android.app.ActivityThread.performConfigurationChangedForActivity(ActivityThread.java:4915)
at android.app.ActivityThread.handleActivityConfigurationChanged(ActivityThread.java:5288)
at android.app.servertransaction.ActivityConfigurationChangeItem.execute(ActivityConfigurationChangeItem.java:43)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1817)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6746)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
// 2
1970-03-20 05:47:11.220 3726-3726/com.android.calculator2 D/WWW: DecorView onConfigurationChanged:
java.lang.Throwable
at com.android.internal.policy.DecorView.onConfigurationChanged(DecorView.java:1850)
at android.view.View.dispatchConfigurationChanged(View.java:13049)
at android.view.ViewGroup.dispatchConfigurationChanged(ViewGroup.java:1575)
at android.view.ViewRootImpl.updateConfiguration(ViewRootImpl.java:3956)
at android.app.ActivityThread.handleActivityConfigurationChanged(ActivityThread.java:5293)
at android.app.servertransaction.ActivityConfigurationChangeItem.execute(ActivityConfigurationChangeItem.java:43)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1817)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6746)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
客户端代码
public final class ActivityThread extends ClientTransactionHandler {
/**
* Handle new activity configuration and/or move to a different display.
* @param activityToken Target activity token.
* @param overrideConfig Activity override config.
* @param displayId Id of the display where activity was moved to, -1 if there was no move and
* value didn't change.
*/
@Override
public void handleActivityConfigurationChanged(IBinder activityToken,
Configuration overrideConfig, int displayId) {
ActivityClientRecord r = mActivities.get(activityToken);
// Check input params.
if (r == null || r.activity == null) {
if (DEBUG_CONFIGURATION) Slog.w(TAG, "Not found target activity to report to: " + r);
return;
}
final boolean movedToDifferentDisplay = displayId != INVALID_DISPLAY
&& displayId != r.activity.getDisplay().getDisplayId();
// Perform updates.
r.overrideConfig = overrideConfig;
final ViewRootImpl viewRoot = r.activity.mDecor != null
? r.activity.mDecor.getViewRootImpl() : null;
if (movedToDifferentDisplay) {
if (DEBUG_CONFIGURATION) Slog.v(TAG, "Handle activity moved to display, activity:"
+ r.activityInfo.name + ", displayId=" + displayId
+ ", config=" + overrideConfig);
final Configuration reportedConfig = performConfigurationChangedForActivity(r,
mCompatConfiguration, displayId, true /* movedToDifferentDisplay */);
if (viewRoot != null) {
viewRoot.onMovedToDisplay(displayId, reportedConfig);
}
} else {
if (DEBUG_CONFIGURATION) Slog.v(TAG, "Handle activity config changed: "
+ r.activityInfo.name + ", config=" + overrideConfig);
// 1
performConfigurationChangedForActivity(r, mCompatConfiguration);
}
// 2
// Notify the ViewRootImpl instance about configuration changes. It may have initiated this
// update to make sure that resources are updated before updating itself.
if (viewRoot != null) {
viewRoot.updateConfiguration(displayId);
}
mSomeActivitiesChanged = true;
}
}
