Android点击Button按钮的四种事件监听方法总结

首先我们在activity_main.xml里面先定义一个Button空间

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<RelativeLayout 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"     tools:context=".MainActivity" >       <Button         android:id="@+id/button1"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_alignParentLeft="true"         android:layout_alignParentTop="true"         android:text="Button" />   </RelativeLayout>

好，现在要我们来看点击事件的四种写法：

1.最常见的一种写法——匿名的内部类做为事件监听器类

 

package com.basillee.blogdemo;

import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity {

    private Button btnButton;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btnButton=(Button)findViewById(R.id.button1);
        btnButton.setOnClickListener(new OnClickListener() {
            public void onClick(View arg0) {
                Toast.makeText(MainActivity.this, "button clicked", Toast.LENGTH_LONG).show();
            }
        });
    }

}

 

2.内部类做为监听器

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package com.basillee.blogdemo;   import android.os.Bundle; import android.app.Activity; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.Toast;   public class MainActivity extends Activity {       private Button btnButton;     @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);         btnButton=(Button)findViewById(R.id.button1);         MyClicked myClicked=new MyClicked();         btnButton.setOnClickListener(myClicked);     }     private class MyClicked implements OnClickListener{           @Override         public void onClick(View arg0) {             Toast.makeText(getApplicationContext(), "Button clicked!", Toast.LENGTH_LONG).show();         }               } }

3.Activity直接实现OnClickListener接口

 

package com.basillee.blogdemo;

import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity implements OnClickListener{

private Button btnButton;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnButton=(Button)findViewById(R.id.button1);
btnButton.setOnClickListener(this);
}
@Override
public void onClick(View arg0) {
Toast.makeText(this, "Button clicked!", Toast.LENGTH_LONG).show();
}

}

 

4.在布局文件中，用android：onClick属性指定对应的方法名实现

activity_main.xml代码如下：

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<RelativeLayout 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"     tools:context=".MainActivity" >       <Button         android:id="@+id/button1"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_alignParentLeft="true"         android:layout_alignParentTop="true"         android:text="Button"         android:onClick="myClick"/>   </RelativeLayout>

MainActivity.java代码如下：

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package com.basillee.blogdemo;   import android.os.Bundle; import android.app.Activity; import android.view.View; import android.widget.Toast;   public class MainActivity extends Activity {       @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);     }     public void myClick(View v){         Toast.makeText(getApplicationContext(),"Button clicked!", Toast.LENGTH_LONG).show();     } }

 

 

转自：http://www.cnblogs.com/BasilLee/p/4101284.html