Android学习笔记进阶19之给图片加边框

//设置颜色
	public void setColour(int color){
		co = color;
	}
	//设置边框宽度
	public void setBorderWidth(int width){
		
		borderwidth = width;
	}

具体实现：

package xiaosi.imageborder;

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;

public class ImageBorderActivity extends Activity {
    /** Called when the activity is first created. */
	private myImageView image = null;
	private myImageView image1 = null;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        image = (myImageView)findViewById(R.id.iamge);
        image.setColour(Color.YELLOW);
        image.setBorderWidth(10);
        image1 = (myImageView)findViewById(R.id.iamge1);
        image1.setColour(Color.GREEN);
        image1.setBorderWidth(5);
    }
}

main.xml

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
  	android:background="@drawable/playerbackground"
  	android:layout_width="fill_parent"
  	android:layout_height="fill_parent">
  	 <xiaosi.imageborder.myImageView 
  	     android:id="@+id/iamge"
         android:layout_width="200px" 
         android:layout_height="230px"
         android:layout_alignParentRight="true"
         android:src="@drawable/v"
         android:layout_centerInParent="true"
         android:layout_marginRight="3px"
        />
  	 <xiaosi.imageborder.myImageView 
  	     android:id="@+id/iamge1"
         android:layout_width="200px" 
         android:layout_height="230px"
         android:layout_alignParentRight="true"
         android:src="@drawable/v"
         android:layout_centerInParent="true"
         android:layout_marginRight="3px"
        />
</LinearLayout>

package xiaosi.imageborder;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.widget.ImageView;

public class myImageView extends ImageView {

	private int co;
	private int borderwidth;
	public myImageView(Context context) {
		super(context);
	}
	public myImageView(Context context, AttributeSet attrs,
			int defStyle) {
		super(context, attrs, defStyle);
	}

	public myImageView(Context context, AttributeSet attrs) {
		super(context, attrs);
	}
    //设置颜色
	public void setColour(int color){
		co = color;
	}
	//设置边框宽度
	public void setBorderWidth(int width){
		
		borderwidth = width;
	}
	@Override
	protected void onDraw(Canvas canvas) {
		super.onDraw(canvas);
		// 画边框
		Rect rec = canvas.getClipBounds();
		rec.bottom--;
		rec.right--;
		Paint paint = new Paint();
		//设置边框颜色
		paint.setColor(co);
		paint.setStyle(Paint.Style.STROKE);
		//设置边框宽度
		paint.setStrokeWidth(borderwidth);
		canvas.drawRect(rec, paint);
	}
}

源代码下载：点击打开链接

posted on 2012-02-18 08:20 mixer-a 阅读(1022) 评论(0) 编辑收藏

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