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我想缩小图像的大小,使其适合我的图像按钮的大小。在这个代码中,我打开了画廊,然后可以选择一个图像。问题是图像不缩小,尽管我在代码中这样说。 为什么这不起作用?为什么我的Android图库的图像不能缩小?
private static final int NEW_WIDTH = 10;
private static final int NEW_HEIGHT = 10;
protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) {
super.onActivityResult(requestCode, resultCode, imageReturnedIntent);
switch(requestCode) {
case SELECT_PHOTO:
if(resultCode == RESULT_OK){
Uri selectedImage = imageReturnedIntent.getData();
String[] filePathColumn = {MediaStore.Images.Media.DATA};
Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String filePath = cursor.getString(columnIndex);
cursor.close();
Bitmap yourSelectedImage = BitmapFactory.decodeFile(filePath);
Bitmap.createScaledBitmap(yourSelectedImage, NEW_WIDTH, NEW_HEIGHT, false);
mImageButton.setImageBitmap(yourSelectedImage);
}
}
}
如何使用ImageButton.setScaleType(INT)(请参见http:/ /developer.android.com/reference/android/widget/ImageView.html#attr_android:scaleType)? – caspase