程序裏模擬按鍵敲擊

描述: IWindowManager 提供了模擬 KeyEvents的簡單方法，名字叫做 IWindowManager.injectKeyEvent(...). 要模擬KeyStroke（按鍵敲擊）, 我們需要模擬一個 指定KeyCode 的 KeyEvent.ACTION_DOWN 和 KeyEvent.ACTION_UP
.
在這個例子裏我們將要模擬 Menu按鍵的 KeyStroke ， 以使 Menu 彈出.

下面是這個例子的源碼

package org.anddev.android.simualtekeys;

import android.app.Activity;
import android.os.Bundle;
import android.os.DeadObjectException;
import android.os.ServiceManager;
import android.view.IWindowManager;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;

public class SimualteKeyInput extends Activity {

     /* The WindowManager capable of injecting keyStrokes. */
     final IWindowManager windowManager = IWindowManager.Stub
               .asInterface(ServiceManager.getService("window"));

     /** Called when the activity is first created. */
     @Override
     public void onCreate(Bundle icicle) {
          super.onCreate(icicle);
          setContentView(R.layout.main);

          /* Make the button do the menu-popup. */
          this.findViewById(R.id.cmd_simulate_key).setOnClickListener(
                    new OnClickListener() {
                         @Override
                         public void onClick(View arg0) {
                              /* Start the key-simulation in a thread
                               * so we do not block the GUI. */
                              new Thread(new Runnable() {
                                   public void run() {
                                        /* Simulate a KeyStroke to the menu-button. */
                                        simulateKeystroke(KeyEvent.KEYCODE_SOFT_LEFT);
                                   }
                              }).start(); /* And start the Thread. */
                         }
                    });
     }

     /** Create a dummy-menu. */
     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
          boolean supRetVal = super.onCreateOptionsMenu(menu);
          menu.add(0, 0, "Awesome it works =)");
          return supRetVal;
     }

     /** Wrapper-function taking a KeyCode.
      * A complete KeyStroke is DOWN and UP Action on a key! */
     private void simulateKeystroke(int KeyCode) {
          doInjectKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN, KeyCode));
          doInjectKeyEvent(new KeyEvent(KeyEvent.ACTION_UP, KeyCode));
     }

     /** This function actually handles the KeyStroke-Injection. */
     private void doInjectKeyEvent(KeyEvent kEvent) {
          try {
               /* Inject the KeyEvent to the Window-Manager. */
               windowManager.injectKeyEvent(kEvent.isDown(), kEvent.getKeyCode(),
                         kEvent.getRepeatCount(), kEvent.getDownTime(), kEvent
                                   .getEventTime(), true);
          } catch (DeadObjectException e) {
               e.printStackTrace();
          }
     }
}

XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
androidrientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<Button id="@+id/cmd_simulate_key"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Simulate Menu Key Press"
/>
</LinearLayout>