下面是我的一个扩展ImageView的RoundedImageView类：

Below is my RoundedImageView class that extends ImageView:

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, 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;
}

和我的XML code是：

And my xml code is:

<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，如果我使用的ImageView显示的图像是没有得到延伸，但如果我用同样的图像和RoundedImageView显示它并保持所有属性不变;该图像是越来越拉伸所示的下面的截图：

So, the problem is, if I use ImageView the image displayed is not getting stretched but if I use the same image and display it in RoundedImageView and keeping all the properties same; the image is getting stretched as shown in the below screenshot:

请帮忙preventing在RoundedImageView显示的图像的拉伸...........我非常坚持这一点。

Please help preventing the stretching of the image displayed in RoundedImageView...........I am badly stuck at this point.

编辑：正虹应用的解决方案后，解决了拉伸问题，但它没有显示完整的圆

After applying Zhenghong's solution, it resolved the stretching issue but then it is not showing the complete round.

在此先感谢！

推荐答案

您应该通过其宽/高利率调整您的位图。

You should resize your bitmap by its width/height rate.

---- EDITED ---- 这将是一个更加灵活的方式来做到这一点。

----EDITED---- This will be a more flexible way to do it.

@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();
    int radius = w < h ? w : h;

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

}

public static Bitmap getCroppedBitmap(Bitmap bmp, 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(), 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(w / 2, h / 2, (w < h ? w : h) / 2, paint);
    paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
    canvas.drawBitmap(sbmp, rect, rect, paint);

    return output;
}