我正在使用TouchImageView(https://github.com/MikeOrtiz/TouchImageView)以全屏显示位图。当我放置普通位图时:
touchImageView.setImageBitmap(bm);
如果用户双击或2手指捏缩放,则图片会放大,但TouchImageView的宽度/高度保持不变。
当我放置更大的位图时,屏幕的宽度/高度将按预期工作:
Bitmap new_bm = Bitmap.createScaledBitmap(bm,
more_px_then_screen_width, more_px_then_screen_height, false);
touchImageView.setImageBitmap(bm);
这是xml:
<TouchImageView
android:id="@+id/picture_full_screen"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true" />
请帮忙 !
最佳答案
经过调查,我发现此功能:
/**
* Set view dimensions based on layout params
*
* @param mode
* @param size
* @param drawableWidth
* @return
*/
private int setViewSize(int mode, int size, int drawableWidth) {
int viewSize;
switch (mode) {
case MeasureSpec.EXACTLY:
viewSize = size;
break;
case MeasureSpec.AT_MOST:
viewSize = Math.min(drawableWidth, size);
break;
case MeasureSpec.UNSPECIFIED:
viewSize = drawableWidth;
break;
default:
viewSize = size;
break;
}
return viewSize;
}
稍后,用户将在
onMeasure
中计算viewWidth
,viewHeight
用于
setMeasuredDimension(viewWidth, viewHeight);
更改
setViewSize
可以达到预期效果:/**
* Set view dimensions based on layout params
*
* @param mode
* @param size
* @param drawableSize
* @return
*/
private int setViewSize(int mode, int size, int drawableSize) {
int viewSize;
switch (mode) {
case MeasureSpec.EXACTLY:
viewSize = (int) (size*Math.max(normalizedScale, 1.0));
break;
case MeasureSpec.AT_MOST:
viewSize = (int) (size*Math.max(normalizedScale, 1.0));
break;
case MeasureSpec.UNSPECIFIED:
viewSize = drawableSize;
break;
default:
viewSize = (int) (size*Math.max(normalizedScale, 1.0));
break;
}
return viewSize;
}
我将
drawableWidth
的名称更改为drawableSize
进行代码提示,因为该函数也用于计算宽度和高度。希望有人会对此有所帮助。