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自定义带边框的TextView android开发
来源:互联网   发布日期:2015-11-15 10:12:28   浏览:2827次  

导读:自定义带边框的TextView///////////////////////Activity///////////////////////////////package cn.class3g.activity;import android.content.Context;import android.graphics.Canvas;import android.gra......

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:

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相关热词: 自定义 边框 TextView

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