Android：View点击事件监听的四种方式

（一）在布局文件中为控件设置onClick属性的指定点击方法

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.myapplication.MainActivity">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/b1"
        android:onClick="b1"
        />
</RelativeLayout>

package com.example.myapplication;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
    public void b1(View view){
        Toast.makeText(this,"b1",Toast.LENGTH_LONG).show();
    }
}

（二）创建一个内部类，实现OnClickListener接口，并重写onClick（）方法，之后用setOnClickListener()方法绑定内部类

(setOnClickListener()方法,需要获取一个要执行类（动作）)

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.myapplication.MainActivity">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/b1"

        />
</RelativeLayout>

package com.example.myapplication;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private Button b1;
    protected void onCreate(Bundle savedInstanceState) {//Bundle savedInstanceState 当前实例的一种状态

13 super.onCreate(savedInstanceState); 14 setContentView(R.layout.activity_main); 

b1=(Button) findViewById(R.id.b1);//获取事件源 

b1.setOnClickListener(new b1());//将事件源与相应的相应绑定


} 

class b1 implements View.OnClickListener{ 

publicvoid onClick(View view){ 21 Toast.makeText(MainActivity.this,"b1",Toast.LENGTH_LONG).show(); 



} 

} 



}

（三）思路同上，但不在书写内部类，直接由当前类实现OnClickListener接口，并重写onClick（）方法

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private Button b1;
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
b1=(Button) findViewById(R.id.b1);
        b1.setOnClickListener(this);

        }
public void onClick(View view)
        {
        Toast.makeText(MainActivity.this,"b1",Toast.LENGTH_LONG).show();

        }


        }

（四）创建匿名内部类，即在进行监听时直接创建一个OnClickListener

package com.example.myapplication;

import android.support.v7.app.AppCompatActivity;
        import android.os.Bundle;
        import android.view.View;
        import android.widget.Button;
        import android.widget.Toast;

public class MainActivity extends AppCompatActivity  {

    private Button b1;
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        b1=(Button) findViewById(R.id.b1);
        b1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this,"b1",Toast.LENGTH_LONG).show();
            }
        });

    }
}