android – 在圆形imageview中显示时图像变得拉伸

下面是我的扩展 ImageView的RoundedImageView类：

public class RoundedImageView extends ImageView {

public RoundedImageView(Context context) {
    super(context);
    // Todo Auto-generated constructor stub
}

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

public RoundedImageView(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 =  ((BitmapDrawable)drawable).getBitmap() ;
    Bitmap bitmap = b.copy(Bitmap.Config.ARGB_8888,true);

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


    Bitmap roundBitmap =  getCroppedBitmap(bitmap,w);
   // roundBitmap= ImageUtils.setCircularInnerGlow(roundBitmap,0xFFBAB399,4,1);
    canvas.drawBitmap(roundBitmap,null);

}

public static Bitmap getCroppedBitmap(Bitmap bmp,int radius) {
    Bitmap sbmp;
    if(bmp.getWidth() != radius || bmp.getHeight() != radius)
        sbmp = Bitmap.createScaledBitmap(bmp,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,sbmp.getWidth(),sbmp.getHeight());

    paint.setAntiAlias(true);
    paint.setFilterBitmap(true);
    paint.setDither(true);
    canvas.drawARGB(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,paint);


            return output;
}

我的xml代码是：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:orientation="horizontal" >

        <com.example.scaletypedemo.RoundedImageView
            android:layout_marginLeft="30dp"
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:layout_centerInParent="true"
            android:scaleType="centerCrop"
            android:src="@drawable/a"
            android:adjustViewBounds="true" />

         <ImageView
                android:layout_marginLeft="50dp"
                android:layout_width="100dp"
                android:layout_height="100dp"
                android:scaleType="centerCrop"
                android:src="@drawable/a" />

    </LinearLayout>

</RelativeLayout>

所以,问题是,如果我使用ImageView,显示的图像不会被拉伸但是如果我使用相同的图像并将其显示在RoundedImageView中并保持所有属性相同;图像被拉伸,如下面的屏幕截图所示：

请帮助防止RoundedImageView中显示的图像拉伸………..我在这一点上非常困难.

编辑：应用正红的解决方案后,它解决了拉伸问题,但后来没有显示完整的一轮.

提前致谢！！！

解决方法

您应该按宽度/高度速率调整位图大小.

—- —- EDITED
这将是一种更灵活的方式.

@Override
protected void onDraw(Canvas canvas) {

    Drawable drawable = getDrawable();

    if (drawable == null) {
        return;
    }

    if (getWidth() == 0 || getHeight() == 0) {
        return;
    }
    Bitmap b = ((BitmapDrawable) drawable).getBitmap();
    Bitmap bitmap = b.copy(Bitmap.Config.ARGB_8888,h = getHeight();
    int radius = w < h ? w : h;

    Bitmap roundBitmap = getCroppedBitmap(bitmap,w,h);
    // roundBitmap= ImageUtils.setCircularInnerGlow(roundBitmap,// 4,int radius,int w,int h) {
    Bitmap sbmp;
    if (bmp.getWidth() != radius || bmp.getHeight() != radius) {
        float _w_rate = 1.0f * radius / bmp.getWidth();
        float _h_rate = 1.0f * radius / bmp.getHeight();
        float _rate = _w_rate < _h_rate ? _h_rate : _w_rate;
        sbmp = Bitmap.createScaledBitmap(bmp,(int)(bmp.getWidth() * _rate),(int)(bmp.getHeight() * _rate),false);
    }
    else
        sbmp = bmp;

    Bitmap output = Bitmap.createBitmap(sbmp.getWidth(),0);
    paint.setColor(Color.parseColor("#BAB399"));
    canvas.drawCircle(w / 2,h / 2,(w < h ? w : h) / 2,paint);

    return output;
}