我尝试使用图库应用。 我的应用程序工作2不同的形式。 从画廊或相机选择, 如果选择照片高度大到宽一切都好。 如果选择的照片宽度大到高,照片看起来是垂直的
实施例, 此图片宽度:3264,高度:2448
我的应用程序似乎是这样;
这是我的解码尺码,对不起英文,谢谢。
private class DecodeSize extends AsyncTask<String,Void,Bitmap> {
private int reqWidth;
private int reqHeight;
private ImageView imageView;
private final WeakReference<ImageView> imageViewReference;
private DecodeSize(int reqWidth, int reqHeight, ImageView imageView) {
this.reqWidth = reqWidth;
this.reqHeight = reqHeight;
this.imageViewReference = new WeakReference<ImageView>(imageView);
}
public int calculateInSampleSize( BitmapFactory.Options options, int reqWidth, int reqHeight) {
// Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
final int halfHeight = height / 2;
final int halfWidth = width / 2;
// Calculate the largest inSampleSize value that is a power of 2 and keeps both
// height and width larger than the requested height and width.
while ((halfHeight / inSampleSize) > reqHeight
&& (halfWidth / inSampleSize) > reqWidth) {
inSampleSize *= 2;
}
}
return inSampleSize;
}
@Override
protected Bitmap doInBackground(String... params) {
String photo_path = params[0];
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(photo_path, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
return BitmapFactory.decodeFile(photo_path, options);
}
@Override
protected void onPostExecute(Bitmap bitmap) {
if(imageViewReference != null && bitmap !=null) {
final ImageView imageView = imageViewReference.get();
if (imageView != null) {
imageView.setImageBitmap(bitmap);
}
}
}
}
private void decodeSizeFunction(String picturePath) {
decodeSize = new DecodeSize(200,200,foto_image);
decodeSize.execute(picturePath);
}