Android开发学习笔记：Button事件实现方法的总结

下面介绍Button事件实现的两种方法

main.xml

xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hello"
    />
<Button
    android:id="@+id/myButton1"
    android:text=" 按钮1 "
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    />
<Button
    android:id="@+id/myButton2"
    android:text=" 按钮2 "
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    />
LinearLayout>

strings.xml

xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="hello">Hello World, ButtonDemoActivity!string>
    <string name="app_name">ButtonDemostring>
resources>

第一种：

ButtonDemoActivity.java

package com.android.ButtonDemo.activity;

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

public class ButtonDemoActivity extends Activity {
    Button myButton1,myButton2;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        myButton1=(Button)findViewById(R.id.myButton1);
        myButton2=(Button)findViewById(R.id.myButton2);

        //使用匿名类注册Button事件
        myButton1.setOnClickListener(new OnClickListener()
        {
            public void onClick(View v)
            {
                Toast.makeText(ButtonDemoActivity.this, "你点击了按钮1",Toast.LENGTH_LONG).show();
            }
        });
        myButton2.setOnClickListener(new OnClickListener()
        {
            public void onClick(View v)
            {
                Toast.makeText(ButtonDemoActivity.this, "你点击了按钮2",Toast.LENGTH_LONG).show();
            }
        });
    }
}

第二种：

ButtonDemoActivity.java

package com.android.ButtonDemo.activity;

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

public class ButtonDemoActivity extends Activity {
    Button myButton1,myButton2;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        myButton1=(Button)findViewById(R.id.myButton1);
        myButton2=(Button)findViewById(R.id.myButton2);
        myButton1.setOnClickListener(new ButtonClick());
        myButton2.setOnClickListener(new ButtonClick());

    }
    //创建一个类，来响应OnClickListener
    class ButtonClick implements OnClickListener
    {
        public void onClick(View v)
        {
            switch (v.getId()) {
            case R.id.myButton1:
                Toast.makeText(ButtonDemoActivity.this, "你点击了按钮1",Toast.LENGTH_LONG).show();
                break;
            case R.id.myButton2:
                Toast.makeText(ButtonDemoActivity.this, "你点击了按钮2",Toast.LENGTH_LONG).show();
                break;
            default:
                break;
            }
        }
    }
}