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

1. 之前我编写的代码是如下：

 package com.himi.vibrate;

 import android.app.Activity;
 import android.app.Service;
 import android.content.res.AssetManager;
 import android.graphics.Typeface;
 import android.os.Bundle;
 import android.os.Vibrator;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.Button;

 public class MainActivity extends Activity implements OnClickListener {
     private Button btnLow;
     private Button btnNormal;
     private Button btnFast;

     Vibrator vibrator;

     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);

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

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

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

         btnLow.setTypeface(tf);
         btnNormal.setTypeface(tf);
         btnFast.setTypeface(tf);

 }

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

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

     }

 protected void onStop() {
         if(null!=vibrator){
             vibrator.cancel();
         }
         super.onStop();
     }
 }

2. 后来才知道原来问题是如此简单,修改完的代码如下：

 package com.himi.vibrate;

 import android.app.Activity;
 import android.app.Service;
 import android.content.res.AssetManager;
 import android.graphics.Typeface;
 import android.os.Bundle;
 import android.os.Vibrator;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.Button;

 public class MainActivity extends Activity implements OnClickListener {
     private Button btnLow;
     private Button btnNormal;
     private Button btnFast;

     Vibrator vibrator;

     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);

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

         btnLow = (Button) findViewById(R.id.btnlow);
         btnNormal = (Button) findViewById(R.id.btnnormal);
         btnFast = (Button) findViewById(R.id.btnfast);

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

         btnLow.setTypeface(tf);
         btnNormal.setTypeface(tf);
         btnFast.setTypeface(tf);

         //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
         btnFast.setOnClickListener(this);//监听当前MainActivity
         btnNormal.setOnClickListener(this);//监听当前MainActivity
         btnLow.setOnClickListener(this);//监听当前MainAcitivity

     }

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

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

     }

     protected void onStop() {
         if(null!=vibrator){
             vibrator.cancel();
         }
         super.onStop();
     }
 }

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)) {

                 …………

      }

……………………

}