android的四种点击事件的设置

第一种:匿名内部类

package com.xspacing.listener;

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

public class MainActivity extends Activity {

    private Button mButton;
    private Context mContext;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mContext = this;
        initViews();
        initDatas();
    }

    private void initViews() {
        mButton = (Button) findViewById(R.id.main_btn_click);
    }

    private void initDatas() {
        mButton.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                Toast.makeText(mContext, "点击了按钮", 0).show();
            }
        });
    }
}

<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="com.xspacing.listener.MainActivity" >

    <Button  android:id="@+id/main_btn_click" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="点击事件" />

RelativeLayout>

第二种:实现接口

package com.xspacing.listener;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
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 mButton;
    private Context mContext;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mContext = this;
        initViews();
        initDatas();
    }

    private void initViews() {
        mButton = (Button) findViewById(R.id.main_btn_click);
    }

    private void initDatas() {
        mButton.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
        case R.id.main_btn_click:
            Toast.makeText(mContext, "点击了按钮", 0).show();
            break;

        default:
            break;
        }
    }
}

布局文件同上

第三种:定义内部类实现接口

package com.xspacing.listener;

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

public class MainActivity extends Activity {

    private Button mButton;
    private Context mContext;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mContext = this;
        initViews();
        initDatas();
    }

    private void initViews() {
        mButton = (Button) findViewById(R.id.main_btn_click);
    }

    private void initDatas() {
        mButton.setOnClickListener(new MyListener());
    }

    class MyListener implements OnClickListener {

        @Override
        public void onClick(View v) {
            switch (v.getId()) {
            case R.id.main_btn_click:
                Toast.makeText(mContext, "点击了按钮", 0).show();
                break;

            default:
                break;
            }
        }

    }
}

布局文件同上

第四种:在xml定义点击属性

package com.xspacing.listener;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends Activity {

    private Context mContext;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mContext = this;
    }

    public void myBtnClick(View view) {
        Toast.makeText(mContext, "点击了按钮", 0).show();
    }
}

<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="com.xspacing.listener.MainActivity" >

    <Button  android:onClick="myBtnClick" android:id="@+id/main_btn_click" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="点击事件" />

RelativeLayout>