自定义带边框的TextView
///////////////////////Activity///////////////////////////////
package cn.class3g.activity;
import Android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.widget.TextView;
public class MyBorderTextView extends TextView{
public MyBorderTextView(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
Paint paint = new Paint();
paint.setColor(android.graphics.Color.YELLOW);
canvas.drawLine(0, 0, this.getWidth()-1, 0, paint);
//1、横坐标0到this.getWidth()-1，纵坐标0到0
canvas.drawLine(0, 0, 0, this.getHeight()-1, paint);
//2、横坐标0到0，纵坐标0到this.getHeight()-1
canvas.drawLine(this.getWidth()-1, 0, this.getWidth()-1, this.getHeight()-1, paint);
//3、横坐标this.getWidth()-1到this.getWidth()-1，纵坐标0到this.getHeight()-1
canvas.drawLine(0, this.getHeight()-1, this.getWidth()-1, this.getHeight()-1, paint);
//4、横坐标0到this.getWidth()-1，纵坐标this.getHeight()-1到this.getHeight()-1
//下面用图介绍边框的绘制
}
}
1
this.getWidth,this.getHeight
0,this.getHeight
this.getWidth()-1,0
0，0
边框的绘制
3
4
2
然后只需要在布局里调用这个就行
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<cn.class3g.activity.MyBorderTextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:padding="30dp"
android:text="hello"
android:textColor="#cccccc" >
</cn.class3g.activity.MyBorderTextView>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:padding="30dp"
android:text="hello hello hello hello"
android:background="@drawable/ic_launcher"
android:textColor="#cccccc" >
</TextView>
</LinearLayout>
效果图：
