模擬按鍵消息

在android 4.0及之前版本上，模擬按鍵消息的接口可以用反射機制獲取到：

long now = SystemClock.uptimeMillis();
KeyEvent down = new KeyEvent(now, now, KeyEvent.ACTION_DOWN, keyCode, 0);
IWindowManager.Stub.asInterface(ServiceManager.getService("window")).injectKeyEvent(down, false);

在4.1以後版本，出於安全性考慮，injectKeyEvent在1.5中不再被IWindowManager實現。模擬按鍵消息可以採取這樣的方法來實現：

InputManager.getInstance().injectInputEvent(down, InputManager.INJECT_INPUT_EVENT_MODE_ASYNC);

完整的模擬按鍵消息的函數實現：

private void simulateKeyEvent(final int keyCode) {
	//Log.i(TAG, "Simulate KeyEvent "+keyCode);

	Thread sendKeyEvent = new Thread() {
		@Override
		public void run() { 						
			try {
				Thread.sleep(100); //TouchEvent
				long now = SystemClock.uptimeMillis();
				KeyEvent down =  new KeyEvent(now, now,KeyEvent.ACTION_DOWN, keyCode, 0);
				KeyEvent up = new KeyEvent(now, now,KeyEvent.ACTION_UP, keyCode, 0);

				//IWindowManager.Stub.asInterface(ServiceManager.getService("window")).injectKeyEvent(down, false);	//[LYNN EDIT]
				//IWindowManager.Stub.asInterface(ServiceManager.getService("window")).injectKeyEvent(up, false);
				InputManager.getInstance().injectInputEvent(down, InputManager.INJECT_INPUT_EVENT_MODE_ASYNC);
				InputManager.getInstance().injectInputEvent(up, InputManager.INJECT_INPUT_EVENT_MODE_ASYNC);
			} catch (Exception e) {
				Log.e(TAG, "Simulate KeyEvent failed !!");
				e.printStackTrace();
			}				
		}
	};
		
	sendKeyEvent.start();
}