Android（java）学习笔记113：Android编写代码调用Vibrator震动功能，按下按钮button始终没有震动

1.之前我编写的代码是如下：

 1 package com.himi.vibrate;  2 

 3 import android.app.Activity;  4 import android.app.Service;  5 import android.content.res.AssetManager;  6 import android.graphics.Typeface;  7 import android.os.Bundle;  8 import android.os.Vibrator;  9 import android.view.View; 10 import android.view.View.OnClickListener; 11 import android.widget.Button; 12 

13 public class MainActivity extends Activity implements OnClickListener { 14     private Button btnLow; 15     private Button btnNormal; 16     private Button btnFast; 17     

18  Vibrator vibrator; 19 

20  @Override 21     public void onCreate(Bundle savedInstanceState) { 22         super.onCreate(savedInstanceState); 23  setContentView(R.layout.activity_main); 24         

25         vibrator = (Vibrator)getSystemService(Service.VIBRATOR_SERVICE); 26         

27         btnLow = (Button) findViewById(R.id.btnlow); 28         btnNormal = (Button) findViewById(R.id.btnnormal); 29         btnFast = (Button) findViewById(R.id.btnfast); 30 //下面这五行代码是实现button上面的文字显示楷体，不用理会

31         

32         AssetManager mgr = getAssets(); 33         Typeface tf = Typeface.createFromAsset(mgr, "fonts/DroidSansFallback.ttf"); 34         

35  btnLow.setTypeface(tf); 36  btnNormal.setTypeface(tf); 37  btnFast.setTypeface(tf); 38 

39 } 40 

41  @Override 42     public void onClick(View v) { 43         if (v.equals(btnLow)) { 44             vibrator.vibrate(new long[] {1000,30,100,1000},0); 45  } 46         if (v.equals(btnNormal)) { 47             

48             vibrator.vibrate(new long[] {800,40,400,30},0); 49  } 50         if (v.equals(btnFast)) { 51             vibrator.vibrate(new long[] {30,100,20,50},0); 52  } 53 

54  } 55 

56 protected void onStop() { 57         if(null!=vibrator){ 58  vibrator.cancel(); 59  } 60         super.onStop(); 61  } 62 }

 

2.后来才知道原来问题是如此简单,修改完的代码如下：

 1 package com.himi.vibrate;  2 

 3 import android.app.Activity;  4 import android.app.Service;  5 import android.content.res.AssetManager;  6 import android.graphics.Typeface;  7 import android.os.Bundle;  8 import android.os.Vibrator;  9 import android.view.View; 10 import android.view.View.OnClickListener; 11 import android.widget.Button; 12 

13 public class MainActivity extends Activity implements OnClickListener { 14     private Button btnLow; 15     private Button btnNormal; 16     private Button btnFast; 17     

18  Vibrator vibrator; 19 

20  @Override 21     public void onCreate(Bundle savedInstanceState) { 22         super.onCreate(savedInstanceState); 23  setContentView(R.layout.activity_main); 24         

25         vibrator = (Vibrator)getSystemService(Service.VIBRATOR_SERVICE); 26         

27         btnLow = (Button) findViewById(R.id.btnlow); 28         btnNormal = (Button) findViewById(R.id.btnnormal); 29         btnFast = (Button) findViewById(R.id.btnfast); 30         

31         AssetManager mgr = getAssets(); 32         Typeface tf = Typeface.createFromAsset(mgr, "fonts/DroidSansFallback.ttf"); 33         

34  btnLow.setTypeface(tf); 35  btnNormal.setTypeface(tf); 36  btnFast.setTypeface(tf); 37         

38         //之前没有加这3条语句，振动服务是没有响应的。后来发现这是语法没有弄清楚，我就是个傻逼

39         btnFast.setOnClickListener(this);//监听当前MainActivity 40         btnNormal.setOnClickListener(this);//监听当前MainActivity 41         btnLow.setOnClickListener(this);//监听当前MainAcitivity 42         

43  } 44 

45  @Override 46     public void onClick(View v) { 47         if (v.equals(btnLow)) { 48             vibrator.vibrate(new long[] {1000,30,100,1000},0); 49  } 50         if (v.equals(btnNormal)) { 51             

52             vibrator.vibrate(new long[] {800,40,400,30},0); 53  } 54         if (v.equals(btnFast)) { 55             vibrator.vibrate(new long[] {30,100,20,50},0); 56  } 57 

58  } 59 

60     

61     protected void onStop() { 62         if(null!=vibrator){ 63  vibrator.cancel(); 64  } 65         super.onStop(); 66  } 67 }

 

 

3.总结

这里是MainAcitivity实现了OnClickListener接口，所以接口监听功能是属于当前MainActivity的，所以是要监听当前MainActivity的：

语法格式如下：

public class MainActivity extends Activity implements OnClickListener  {

………………

      public void onCreate(Bundle savedInstanceState) {

                  …………

       btn1 = (Button) findViewById(R.id.button1);

       btn1.setOnClickListener(this);//监听当前Acitivity，当然这里监听的就是MainActivity

       }

 

      public void onClick(View v) {

       if (v.equals(btn1)) {

                 …………

      }

 

……………………

}