android 使用shape定义圆角矩形

通过在drawble下定义xml实现圆角边

没事随便写写！需要用到圆角矩形边框，通过在drawble文件定义shape.xml实现；
不多说，直接上代码：
shape_round_corner.xml

//定义四个圆角
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="#ff00" />
    <corners android:topLeftRadius="12dp"
        android:topRightRadius="12dp"
        android:bottomRightRadius="12dp"
        android:bottomLeftRadius="12dp"/>
    <stroke android:width="1dp" android:color="#ff0" />
shape>


<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="#ff00" />
    <corners android:topLeftRadius="12dp"
        android:topRightRadius="12dp"
        />
    <stroke android:width="1dp" android:color="#ff0" />
shape>

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
    <LinearLayout
        android:layout_width="300dp"
        android:layout_height="300dp"
        android:layout_marginBottom="10dp"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:layout_marginTop="10dp"
        android:alpha="0.8"
        android:background="@drawable/shape_round_corner">
    LinearLayout>
LinearLayout>

MainActivity.java

public class MainActivity extends Activity {

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

}

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