Android（java）学习笔记54：Android 调用Vibrator震动功能

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)) {

…………

}

……………………

}