Android开发学习笔记：圆角的Button

shape.xml

<?xml version="1.0" encoding="UTF-8"?>
<shape
xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<!-- 填充的颜色 -->
<solid android:color="#FFFFFF" />
<!-- 设置按钮的四个角为弧形 -->
<!-- android:radius 弧形的半径 -->
<corners android:radius="5dip" />

<!-- padding：Button里面的文字与Button边界的间隔 -->
<padding
android:left="10dp"
android:top="10dp"
android:right="10dp"
android:bottom="10dp"
/>
</shape>

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/roundButton"
android:text=" 圆角按钮 "
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/shape"
/>
</LinearLayout>

strings.xml

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

RoundButtonDemoActivity.java

package com.android.RoundButtonDemo.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 RoundButtonDemoActivity extends Activity {
Button roundButton;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

roundButton=(Button)findViewById(R.id.roundButton);
//使用匿名类注册Button事件
roundButton.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
Toast.makeText(RoundButtonDemoActivity.this, "你点击了圆角按钮",Toast.LENGTH_LONG).show();
}
});
}
}

效果图：