Android中button的onClick事件几种方法

package com.example.androidtest; 
 
import android.os.Bundle; 
import android.app.Activity; 
import android.content.Intent; 
import android.view.Menu; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.Toast; 
import android.view.View; 
import android.widget.TextView;  
import android.view.View.OnClickListener; 
import android.widget.Button;  
//import android.text.Editable;  
//import android.text.TextWatcher;  
import android.widget.EditText; 
 
public class MainActivity extends Activity  
{   
  @Override 
 protected void onCreate(Bundle savedInstanceState) 
  { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    Button    button1 = (Button)findViewById(R.id.button1);   
    Button    button2 = (Button)findViewById(R.id.button2);  
    //方法一： 
    //增加事件响应   
    button1.setOnClickListener(new Button.OnClickListener() 
    {   
      public void onClick(View v)  
      {         
        Intent intent =new Intent(); 
        intent.setClass(MainActivity.this, TestActivity.class); 
        MainActivity.this.startActivity(intent); 
      }      
    }); 
     
    button2.setOnClickListener(new Button.OnClickListener() 
    {   
      public void onClick(View v)  
      {         
        Intent intent =new Intent(); 
        intent.setClass(MainActivity.this, TActivity.class); 
        MainActivity.this.startActivity(intent); 
      }      
    }); 
  

}   

package com.example.androidtest; 
 
import android.os.Bundle; 
import android.app.Activity; 
import android.content.Intent; 
import android.view.Menu; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.Toast; 
import android.view.View; 
import android.widget.TextView;  
import android.view.View.OnClickListener; 
import android.widget.Button;  
//import android.text.Editable;  
//import android.text.TextWatcher;  
import android.widget.EditText; 
 
public class MainActivity extends Activity  
{   
  @Override 


  { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    Button    button1 = (Button)findViewById(R.id.button1);   
    Button    button2 = (Button)findViewById(R.id.button2);  
  }       
 
  //方法二： 
  public void myClickHandler(View target){  
    switch (target.getId()) {  
    case R.id.button1:   
      Intent music=new Intent(); 
      music.setClass(MainActivity.this, TestActivity.class); 
      MainActivity.this.startActivity(music); 
     // setTitle("myClickHandler01");  
      break;  
    case R.id.button2:   
     // setTitle("myClickHandler02");  
      Intent moive=new Intent(); 
      moive.setClass(MainActivity.this, TActivity.class); 
      MainActivity.this.startActivity(moive); 
      break;  
    }  
  } 


} 

 package com.example.androidtest; 
 
import android.os.Bundle; 
import android.app.Activity; 
import android.content.Intent; 
import android.view.Menu; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.Toast; 
import android.view.View; 
import android.widget.TextView;  
import android.view.View.OnClickListener; 
import android.widget.Button;  
//import android.text.Editable;  
//import android.text.TextWatcher;  
import android.widget.EditText; 
 
public class MainActivity extends Activity  
{   
  protected void onCreate(Bundle savedInstanceState) 
  { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 


    } 
//方法三： 
  public void myClickHandler01(View target){  
    //设置activity的头标题 
    // setTitle("myClickHandler01");  
    Intent music=new Intent(); 
    music.setClass(MainActivity.this, TestActivity.class); 
    MainActivity.this.startActivity(music); 
  }  
  public void myClickHandler02(View target){  
    //设置activity的头标题 
   // setTitle("myClickHandler02");  
    Intent moive=new Intent(); 
    moive.setClass(MainActivity.this, TActivity.class); 
    MainActivity.this.startActivity(moive); 
  } 



}