Android PhoneWindowManager监听屏幕右侧向左滑动实现返回功能的实现
这篇文章主要讲解了Android PhoneWindowManager监听屏幕右侧向左滑动实现返回功能的实现,内容清晰明了,对此有兴趣的小伙伴可以学习一下,相信大家阅读完之后会有帮助。
由于项目没有设计返回键,一旦进入别的应用,就无法回到桌面。只能通过串口输入input keyevent 4(返回键)来返回桌面,为了方便调试,在Framework 中监听手势,实现返回功能。
在frameworks\base\services\core\java\com\android\server\policy\PhoneWindowManager中有这么一段代码
mSystemGestures = new SystemGesturesPointerEventListener(context, new SystemGesturesPointerEventListener.Callbacks() { @Override public void onSwipeFromTop() { Log.i("gyx","onSwipeFromTop"); if (mStatusBar != null) { requestTransientBars(mStatusBar); } } @Override public void onSwipeFromBottom() { Log.i("gyx","onSwipeFromBottom"); if (mNavigationBar != null && mNavigationBarPosition == NAV_BAR_BOTTOM) { requestTransientBars(mNavigationBar); } } @Override public void onSwipeFromRight() { Log.i("gyx","onSwipeFromRight"); sendKeyCode(4); Log.i("gyx","sendKeyCode 4"); if (mNavigationBar != null && mNavigationBarPosition == NAV_BAR_RIGHT) { requestTransientBars(mNavigationBar); } } @Override public void onSwipeFromLeft() { Log.i("gyx","onSwipeFromLeft"); if (mNavigationBar != null && mNavigationBarPosition == NAV_BAR_LEFT) { requestTransientBars(mNavigationBar); } } @Override public void onFling(int duration) { if (mPowerManagerInternal != null) { mPowerManagerInternal.powerHint( PowerHint.INTERACTION, duration); } } @Override public void onDebug() { // no-op } @Override public void onDown() { mOrientationListener.onTouchStart(); } @Override public void onUpOrCancel() { mOrientationListener.onTouchEnd(); } @Override public void onMouseHoverAtTop() { mHandler.removeMessages(MSG_REQUEST_TRANSIENT_BARS); Message msg = mHandler.obtainMessage(MSG_REQUEST_TRANSIENT_BARS); msg.arg1 = MSG_REQUEST_TRANSIENT_BARS_ARG_STATUS; mHandler.sendMessageDelayed(msg, 500); } @Override public void onMouseHoverAtBottom() { mHandler.removeMessages(MSG_REQUEST_TRANSIENT_BARS); Message msg = mHandler.obtainMessage(MSG_REQUEST_TRANSIENT_BARS); msg.arg1 = MSG_REQUEST_TRANSIENT_BARS_ARG_NAVIGATION; mHandler.sendMessageDelayed(msg, 500); } @Override public void onMouseLeaveFromEdge() { mHandler.removeMessages(MSG_REQUEST_TRANSIENT_BARS); } });
代码中监听了手势操作,其中onSwipeFromRight()
就是当从屏幕的右侧向左滑动时会触发,只要在这里加入返回的功能即可;
实现返回按键的功能代码如下
private void sendKeyCode(final int keyCode) { new Thread(new Runnable() { @Override public void run() { try { // 创建一个Instrumentation对象 Instrumentation inst = new Instrumentation(); // 调用inst对象的按键模拟方法 inst.sendKeyDownUpSync(keyCode); } catch (Exception e) { e.printStackTrace(); } } }).start(); }
看完上述内容,是不是对Android PhoneWindowManager监听屏幕右侧向左滑动实现返回功能的实现有进一步的了解,如果还想学习更多内容,欢迎关注行业资讯频道。