首页 > 代码库 > Android点击Button按钮的四种事件监听方法总结

Android点击Button按钮的四种事件监听方法总结

2024-11-01 13:04:02   209人阅读

首先我们在activity_main.xml里面先定义一个Button空间

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
<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

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
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：

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
<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：

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
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

Android点击Button按钮的四种事件监听方法总结


联系
我们