我正在尝试将图像保存为从 android 裁剪的图像，然后在我的应用程序中显示。我正在使用下面的代码，但是当我尝试在我的应用程序中查看图像时，图像质量不如附加图像中的好。做错什么了吗？任何帮助都会很棒。
我的代码是：
dipToPixel = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 1, getResources().getDisplayMetrics());
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 1 && resultCode == getActivity().RESULT_OK && data != null) {
picUri = data.getData();
performCrop();
}
if (requestCode == 111 && resultCode == getActivity().RESULT_OK && data != null) {
Bundle extras = data.getExtras();
Bitmap bitmapImage = extras.getParcelable("data");
tweetImage.setImageBitmap(bitmapImage);
tweetImage.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
public boolean onPreDraw() {
tweetImage.getViewTreeObserver().removeOnPreDrawListener(this);
widthPixel = tweetImage.getMeasuredWidth();
heightPixel = tweetImage.getMeasuredHeight();
return true;
}
});
System.out.println("photo added");
addPhotoVar = 1;
addPhotoBtn.setText("remove");
}
callbackManager.onActivityResult(requestCode, resultCode, data);
}
private void performCrop() {
try {
//call the standard crop action intent (the user device may not support it)
Intent cropIntent = new Intent("com.android.camera.action.CROP");
//indicate image type and Uri
cropIntent.setDataAndType(picUri, "image/*");
//set crop properties
cropIntent.putExtra("crop", "true");
//indicate aspect of desired crop
cropIntent.putExtra("aspectX", 1);
cropIntent.putExtra("aspectY", 1);
//indicate output X and Y
cropIntent.putExtra("outputX", Math.round(screenWidth / dipToPixel)-10);
cropIntent.putExtra("outputY", Math.round(screenWidth / dipToPixel)-10);
//retrieve data on return
cropIntent.putExtra("return-data", true);
//start the activity - we handle returning in onActivityResult
startActivityForResult(cropIntent, 111);
}
// respond to users whose devices do not support the crop action
catch (ActivityNotFoundException anfe) {
// display an error message
String errorMessage = "your device doesn't support the crop action!";
Toast toast = Toast.makeText(getActivity(), errorMessage, Toast.LENGTH_SHORT);
toast.show();
}
}
下面是我使用图像并保存到数据库的代码：
tweetImage.buildDrawingCache();
bm = tweetImage.getDrawingCache();
if (widthPixel < heightPixel) {
basePixel = widthPixel;
}
else {
basePixel = heightPixel;
}
if (basePixel > 768) {
widthRatio = (float) 768/basePixel;
heightRatio = (float) 768/basePixel;
}
else {
widthRatio = 1;
heightRatio = 1;
}
Bitmap bmResized = Bitmap.createScaledBitmap(bm,(int)(widthPixel*widthRatio), (int)(heightPixel*heightRatio), true);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bmResized.compress(Bitmap.CompressFormat.JPEG, 100, stream);
byteArray1 = stream.toByteArray();
image1 = new ParseFile("profilePhoto.jpg", byteArray1, "image/jpg");