Android学习笔记技巧之给文本加边框

               

BorderTextViews.java

package xiaosi.BorderTextView;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.util.AttributeSet;import android.widget.TextView;public class BorderTextViews extends TextView{ private Paint paint = null; private int color = Color.GRAY; public BorderTextViews(Context context, AttributeSet attrs) {  super(context, attrs); }    //设置边框颜色 public void setPaintColor(int color){  this.color = color; } @Override protected void onDraw(Canvas canvas) {  super.onDraw(canvas);  paint = new Paint();  //给边框设置颜色  paint.setColor(color);  //上  canvas.drawLine(0, 0, this.getWidth()-1, 0, paint);  //左  canvas.drawLine(0, 0, 0, this.getHeight()-1, paint);  //下  canvas.drawLine(0, this.getHeight()-1, this.getWidth()-1, this.getHeight()-1, paint);  //右  canvas.drawLine(this.getWidth()-1, 0, this.getWidth()-1, this.getHeight()-1, paint); }}

 

package xiaosi.BorderTextView;import android.app.Activity;import android.graphics.Color;import android.os.Bundle;public class BorderTextViewActivity extends Activity {    /** Called when the activity is first created. */ private BorderTextViews borderTextView = null;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        borderTextView = (BorderTextViews)findViewById(R.id.Border);        borderTextView.setPaintColor(Color.GRAY);    }}

 

main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical"     android:background="#CCFF66">    <xiaosi.BorderTextView.BorderTextViews        android:id="@+id/Border"        android:layout_width="wrap_content"         android:layout_height="wrap_content"  android:textColor="#C71585"   android:layout_marginTop="20dp"  android:padding="10dp"   android:layout_gravity="center"   android:text="在画布上画边框" /></LinearLayout>

 

           

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