向自定义Android ImageView添加白色边框和阴影

时间:2014-07-06 00:06:22

标签: android imageview

我知道之前已经提出这个问题,但我一直在努力想出一个解决方案。

我有一个带有完整圆角的自定义ImageView,可以通过编程方式完成。

我有类似的东西

enter image description here

但我希望得到类似的东西:

enter image description here

这是我的自定义ImageView类。

@SuppressLint("NewApi")
public class MLRoundedImageView extends ImageView {

private Context context;

public MLRoundedImageView(Context context) {
    super(context);
    this.context = context;
}

public MLRoundedImageView(Context context, AttributeSet attrs) {
    super(context, attrs);
    this.context = context;

}

public MLRoundedImageView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    this.context = context;
}

@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);
    canvas.drawBitmap(roundBitmap, 0, 0, null);
}

@SuppressLint("NewApi")
public Bitmap getCroppedBitmap(Bitmap bmp, int radius) {
    Bitmap sbmp;

    if (bmp.getWidth() != radius || bmp.getHeight() != radius) {
        float smallest = Math.min(bmp.getWidth(), bmp.getHeight());
        float factor = smallest / radius;
        sbmp = Bitmap.createScaledBitmap(bmp, (int)(bmp.getWidth() / factor), (int)(bmp.getHeight() / factor), false);
    } else {
        sbmp = bmp;
    }

    Bitmap output = Bitmap.createBitmap(radius, radius,
            Config.ARGB_8888);
    Canvas canvas = new Canvas(output);

    final int color = 0xffa19774;
    final Paint paint = new Paint();

    final Rect rect = new Rect(0, 0, radius, radius);

    paint.setAntiAlias(true);
    paint.setFilterBitmap(true);
    paint.setDither(true);

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

    return output;
}

}

我知道我需要添加一些额外的东西我不想重新创建整个类,因为我的项目非常依赖它。

提前致谢!

1 个答案:

答案 0 :(得分:0)

使用图层列表:

http://developer.android.com/guide/topics/resources/drawable-resource.html#LayerList

基本上创建一个具有所需尺寸的白色圆圈,并使用图层列表在图片

下创建它