Android实现简单手机震动效果

<uses-permission android:name="android.permission.VIBRATE" />

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity"
    android:orientation="vertical" >
 
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />
    
    <Button 
        android:id="@ id/btn1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="震动1"/>
    
    <Button 
        android:id="@ id/btn2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="震动2"/>
    
    <Button 
        android:id="@ id/btn3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="震动3"/>
 
</LinearLayout>

package com.sl.vibratordemo;
 
import android.os.Bundle;
import android.os.SystemClock;
import android.os.Vibrator;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.app.Activity;
import android.content.Context;
 
public class MainActivity extends Activity
{
 private Button btn1 = null;
 private Button btn2 = null;
 private Button btn3 = null;
 
 @Override
 protected void onCreate(Bundle savedInstanceState)
 {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  
  btn1 = (Button)findViewById(R.id.btn1);
  btn2 = (Button)findViewById(R.id.btn2);
  btn3 = (Button)findViewById(R.id.btn3);
  btn1.setOnClickListener(listener);
  btn2.setOnClickListener(listener);
  btn3.setOnClickListener(listener);
 }
 
 OnClickListener listener = new View.OnClickListener()
 {
  @Override
  public void onClick(View v)
  {
   Vibrator vibrator = (Vibrator)getSystemService(Context.VIBRATOR_SERVICE);
   switch (v.getId())
   {
   case R.id.btn1:
    vibrator.vibrate(1000);//震动1秒
    break;
   case R.id.btn2:
    long[] pattern1 = {1000, 2000, 1000, 3000}; //等待1秒，震动2秒，等待1秒，震动3秒   
    vibrator.vibrate(pattern1, -1);
    break;
   case R.id.btn3:
    long[] pattern2 = {1000, 500, 1000, 1000};
    vibrator.vibrate(pattern2, 2);//-1表示不重复, 如果不是-1, 比如改成1, 表示从前面这个long数组的下标为1的元素开始重复.
    SystemClock.sleep(10000);//震动10s以后停止
    vibrator.cancel();
    break;
   default:
    break;
   }
  }
 };
}