关于 android ImageView　圆角处理　圆图

相关组件找到了4个

其一：http://stackoverflow.com/questions/16208365/create-circular-image-view-in-android

package cn.com.idress.view;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ImageView;

import com.lidroid.xutils.bitmap.core.AsyncDrawable;

public class RoundedImageView1 extends ImageView {

public RoundedImageView1(Context context) {
    super(context);
    // TODO Auto-generated constructor stub
}

public RoundedImageView1(Context context, AttributeSet attrs) {
    super(context, attrs);
}

public RoundedImageView1(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
}

@Override
protected void onDraw(Canvas canvas) {

    Drawable drawable = getDrawable();

    if (drawable == null) {
        return;
    }

    if (getWidth() == 0 || getHeight() == 0) {
        return; 
    }
    Bitmap b = null;
    if(drawable instanceof BitmapDrawable){
    	b =  ((BitmapDrawable)drawable).getBitmap() ;
    }else if(drawable instanceof AsyncDrawable){
    	b = Bitmap 
    			.createBitmap( 
    			getWidth(), 
    			getHeight(), 
    			drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 
    			: Bitmap.Config.RGB_565); 
    			Canvas canvas1 = new Canvas(b); 
    			// canvas.setBitmap(bitmap); 
    			drawable.setBounds(0, 0, getWidth(), 
    			getHeight()); 
    			drawable.draw(canvas1); 
    }
    Bitmap bitmap = b.copy(Bitmap.Config.ARGB_8888, true);

    int w = getWidth(), h = getHeight();


    Bitmap roundBitmap =  getCroppedBitmap(bitmap, w);
    canvas.drawBitmap(roundBitmap, 0,0, null);

}

public static Bitmap getCroppedBitmap(Bitmap bmp, int radius) {
    Bitmap sbmp;
    if(bmp.getWidth() != radius || bmp.getHeight() != radius)
        sbmp = Bitmap.createScaledBitmap(bmp, radius, radius, false);
    else
        sbmp = bmp;
    Bitmap output = Bitmap.createBitmap(sbmp.getWidth(),
            sbmp.getHeight(), Config.ARGB_8888);
    Canvas canvas = new Canvas(output);

    final int color = 0xffa19774;
    final Paint paint = new Paint();
    final Rect rect = new Rect(0, 0, sbmp.getWidth(), sbmp.getHeight());

    paint.setAntiAlias(true);
    paint.setFilterBitmap(true);
    paint.setDither(true);
    canvas.drawARGB(0, 0, 0, 0);
    paint.setColor(Color.parseColor("#BAB399"));
    canvas.drawCircle(sbmp.getWidth() / 2+0.7f, sbmp.getHeight() / 2+0.7f,
            sbmp.getWidth() / 2+0.1f, paint);
    paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
    canvas.drawBitmap(sbmp, rect, rect, paint);


            return output;
}

}

    else if(drawable instanceof AsyncDrawable){

              xxxxxxxxxxxxxxxxxx

    }

   加此处代码为解决xutils加载图片

   其二：https://github.com/vinc3m1/RoundedImageView

　此组件　用于圆角。圆图，但不支持xutils显示

   其三：https://github.com/lopspower/CircularImageView

   这个同样不支持xutils

   在 onDraw 方法中 加入判断即可

    else if(this.getDrawable() instanceof AsyncDrawable){

Drawable drawable = this.getDrawable();

image = Bitmap 

   .createBitmap( 

       getWidth(), 

       getHeight(), 

       drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 

       : Bitmap.Config.RGB_565); 

       Canvas canvas1 = new Canvas(image); 

       // canvas.setBitmap(bitmap); 

       drawable.setBounds(0, 0, getWidth(), 

       getHeight()); 

       drawable.draw(canvas1); 

}

         其四：https://github.com/hdodenhof/CircleImageView

　这个也不错。同样不支持xutils，判断尚不知道如何加

       不要问我哪个最好。。我用的 第三个。。还可以。