android实现虚拟按键实例
上代码：

package com.tcl.testandroid;import android.app.Activity;import android.app.Instrumentation;import android.os.Bundle;import android.os.Handler;import android.view.KeyEvent;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;import android.widget.TextView;public class TestAndroidActivity extends Activity {private Handler mhHandler = new Handler();private Instrumentation in =new Instrumentation();    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        setTheme(android.R.style.Theme_Dialog);        final Button button = (Button) findViewById(R.id.button1);        final EditText editText = (EditText) findViewById(R.id.editText);        button.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {editText.requestFocus();new Thread(new Runnable() {@Overridepublic void run() {// TODO Auto-generated method stubin.sendKeyDownUpSync(KeyEvent.KEYCODE_F);in.sendKeyDownUpSync(KeyEvent.KEYCODE_U);in.sendKeyDownUpSync(KeyEvent.KEYCODE_C);in.sendKeyDownUpSync(KeyEvent.KEYCODE_K);mhHandler.post(new Runnable() {@Overridepublic void run() {// TODO Auto-generated method stubbutton.requestFocus();}});}}).start();// TODO Auto-generated method stub}});                    }}

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical" android:layout_width="wrap_content"android:layout_height="wrap_content"><Button android:text="Button" android:id="@+id/button1"android:layout_width="wrap_content" android:layout_height="wrap_content"></Button><EditText android:id="@+id/editText" android:layout_height="wrap_content"android:layout_width="192dp" /></LinearLayout>