Android开发学习笔记：圆角的Button

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在res目录下的drawable-mdpi建立xml文件shape.xml,如下图所示：

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

在android:background="@drawable/shape"就使用了shape.xml资源

<?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：

转http://liangruijun.blog.51cto.com/3061169/630051

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