如何在用于个人资料照片的当前Google应用程序中创建可选择的圆形
ImageView？
这就是我所说的：
取消选择上面的图像,然后选择下面的图像.
到目前为止我的工作：
loadedImage是显示的位图
mImageView.setBackground(createStateListDrawable()); mImageView.setImageBitmap(createRoundImage(loadedImage));
使用的方法：
private Bitmap createRoundImage(Bitmap loadedImage) {
Bitmap circleBitmap = Bitmap.createBitmap(loadedImage.getWidth(),loadedImage.getHeight(),Bitmap.Config.ARGB_8888);
BitmapShader shader = new BitmapShader(loadedImage,Shader.TileMode.CLAMP,Shader.TileMode.CLAMP);
Paint paint = new Paint();
paint.setAntiAlias(true);
paint.setShader(shader);
Canvas c = new Canvas(circleBitmap);
c.drawCircle(loadedImage.getWidth() / 2,loadedImage.getHeight() / 2,loadedImage.getWidth() / 2,paint);
return circleBitmap;
}
private StateListDrawable createStateListDrawable() {
StateListDrawable stateListDrawable = new StateListDrawable();
OvalShape ovalShape = new OvalShape();
ShapeDrawable shapeDrawable = new ShapeDrawable(ovalShape);
stateListDrawable.addState(new int[] { android.R.attr.state_pressed },shapeDrawable);
stateListDrawable.addState(StateSet.WILD_CARD,shapeDrawable);
return stateListDrawable;
}
ImageView的大小是imageSizePx,图像的大小是imageSizePx – 3.因此,这意味着背景应该与图像重叠.哪个不起作用.
解决方法
非常简单的解决方案,感谢@CommonsWare的提示.
位图大小：imageSizePx – 3DP
ImageView的大小：imageSizePx
mImageView.setBackground(createStateListDrawable(imageSizePx));
mImageView.setImageBitmap(loadedImage);
private StateListDrawable createStateListDrawable(int size) {
StateListDrawable stateListDrawable = new StateListDrawable();
OvalShape ovalShape = new OvalShape();
ovalShape.resize(size,size);
ShapeDrawable shapeDrawable = new ShapeDrawable(ovalShape);
shapeDrawable.getPaint().setColor(getResources().getColor(R.color.somecolor));
stateListDrawable.addState(new int[]{android.R.attr.state_pressed},shapeDrawable);
stateListDrawable.addState(new int[]{android.R.attr.state_focused},shapeDrawable);
stateListDrawable.addState(new int[]{},null);
return stateListDrawable;
}
