Android 控件开发之Button

摘自： http://blog.csdn.net/sun6255028/article/details/6685003

sun6255028的专栏

Button，就是按钮，是android中应用最多的组件之一

Button的显示效果图:



本文程序的main.xml

[cpp] view
plaincopy

<?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">

<Button

android:id="@+id/btn1"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/btn1"/>

<Button

android:id="@+id/btn2"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/btn2"/>

</LinearLayout>

本程序的string.xml

[cpp] view
plaincopy

<?xml version="1.0" encoding="utf-8"?>

<resources>

<string name="btn1">确认</string>

<string name="btn2">取消</string>

<string name="app_name">Button</string>

</resources>

本程序的java文件

[cpp] view
plaincopy

package com.sx.Button;

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 ButtonActivity extends Activity

{

private Button btn1 = null;

private Button btn2 = null;

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

btn1 = (Button)findViewById(R.id.btn1);

btn1.setOnClickListener(new ButtonClicked());

btn2 = (Button)findViewById(R.id.btn2);

btn2.setOnClickListener(new ButtonClicked());

}

//创建Button监听器

class ButtonClicked implements OnClickListener

{

public void onClick(View v)

{

switch(v.getId())

{

case R.id.btn1:

//系统输出信息

System.out.println("你点击了确定按钮");

//使用Toast类输出信息

Toast.makeText(ButtonActivity.this, "你点击了确定按钮", Toast.LENGTH_LONG).show();

break;

case R.id.btn2:

System.out.println("你点击了取消按钮");

Toast.makeText(ButtonActivity.this, "你点击了取消按钮", Toast.LENGTH_LONG).show();

break;

}

}

}

}