问题
Read My Whole Code. It is working perfectly on every Phone except Marshmallow and Lollipop. In Marshmallow and Lollipop phones Only problem is coming in data.getData() returning null only in case of Picture Captured. It is working fine if i capture Video .I have 4 cases -
Choosing Picture from Gallery and show its thumbnail in
Imageview- Working Fine.Capturing Picture from Camera and show its thumbnail in
Imageview- NOT WORKING inMarshmallowandLollipop.Choosing Video from Gallery and show its thumbnail in
Imageview- Working Fine.3.Capturing Video from Camera and show its thumbnail in
Imageview- Working Fine.
Now There are many solutions but neither of them looks satisfactory,If code is working fine in case of Video Capturing then why its NOT working for Image Capturing?Is it a Bug or I am doing wrong somewhere?
Here is My Code . I have commented a line where crash happens-
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
int THUMBSIZE = 120;
switch (requestCode){
case RESULT_LOAD_IMAGE:
if (resultCode==RESULT_OK){
String column_Name= MediaStore.Images.Media.DATA;
String picturePath=getPath(column_Name,data.getData());
Bitmap orientedBitmap = ExifUtil.rotateBitmap(picturePath, BitmapFactory.decodeFile(picturePath));
Drawable fullpic=new BitmapDrawable(getResources(),ThumbnailUtils.extractThumbnail(orientedBitmap, THUMBSIZE, THUMBSIZE));
thumbnailview.setBackground(fullpic);
editText.setText(picturePath);
picker.setVisibility(View.VISIBLE);
thumbnailview.setClickable(false);
}
break;
case REQUEST_IMAGE_CAPTURE:
if (resultCode==RESULT_OK){
String picturePath="";
String column_Name=MediaStore.Images.Media.DATA;
picturePath=getPath(column_Name,data.getData());
//My app Crashes here because in Marshmallow data.getData() is always null.
Bitmap orientedBitmap = ExifUtil.rotateBitmap(picturePath, BitmapFactory.decodeFile(picturePath));
Drawable fullpic=new BitmapDrawable(getResources(),ThumbnailUtils.extractThumbnail(orientedBitmap, THUMBSIZE, THUMBSIZE));
thumbnailview.setBackground(fullpic);
editText.setText(picturePath);
picker.setVisibility(View.VISIBLE);
thumbnailview.setClickable(false);
}
break;
case RESULT_LOAD_VIDEO:
if (resultCode==RESULT_OK){
String column_Name=MediaStore.Video.Media.DATA;
String videoPath=getPath(column_Name,data.getData());
Drawable fullpic=new BitmapDrawable(getResources(),ThumbnailUtils.createVideoThumbnail(videoPath,MediaStore.Video.Thumbnails.MINI_KIND));
thumbnailview.setBackground(fullpic);
editText.setText(videoPath);
picker.setVisibility(View.VISIBLE);
thumbnailview.setClickable(false);
}
break;
case REQUEST_VIDEO_CAPTURE:
if (resultCode==RESULT_OK){
String column_Name=MediaStore.Video.Media.DATA;
String videoPath=getPath(column_Name,data.getData());
Drawable fullpic=new BitmapDrawable(getResources(),ThumbnailUtils.createVideoThumbnail(videoPath,MediaStore.Video.Thumbnails.MINI_KIND));
thumbnailview.setBackground(fullpic);
editText.setText(videoPath);
picker.setVisibility(View.VISIBLE);
thumbnailview.setClickable(false);
}
break;
}
if (picker != null) {
picker.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
OpenDialog();
}
});
}
}
private String getPath(String column_Name,Uri uri){
String[] projection = {column_Name};
String path = "";
Cursor cursor = getContentResolver().query(uri, projection, null, null, null);
int column_index_data ;
if (cursor != null) {
column_index_data = cursor.getColumnIndexOrThrow(column_Name);
cursor.moveToFirst();
path = cursor.getString(column_index_data);
cursor.close();
}
return path;
}
private void OpenDialog(){
dialogBox.setTitle("Select an Action");
dialogBox.setMessage("Choose Picture or Video");
dialogBox.setPositiveButton("Picture", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
if (check_Permissions()){
OpenCameraDialog();
}
else {
request_Permissions();
CAMERA_DIALOG_PERMISSION=1;
}
}
});
dialogBox.setNegativeButton("Video", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
if (check_Permissions()){
OpenVideoDialog();
}
else {
request_Permissions();
VIDEO_DIALOG_PERMISSION=1;
}
}
});
dialogBox.show();
}
private void OpenCameraDialog(){
dialogBox.setTitle("Select an Action");
dialogBox.setMessage("Choose Picture From");
dialogBox.setPositiveButton("Gallery", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
final Intent galleryintent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(galleryintent, RESULT_LOAD_IMAGE);
}
});
dialogBox.setNegativeButton("Camera", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
final Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
}
});
dialogBox.show();
}
private void OpenVideoDialog(){
dialogBox.setTitle("Select an Action");
dialogBox.setMessage("Choose Video From");
dialogBox.setPositiveButton("Gallery", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
final Intent galleryintent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Video.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(galleryintent, RESULT_LOAD_VIDEO);
}
});
dialogBox.setNegativeButton("Camera", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
final Intent takeVideoIntent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
if (takeVideoIntent.resolveActivity(getPackageManager()) != null) {
startActivityForResult(takeVideoIntent, REQUEST_VIDEO_CAPTURE);
}
}
});
dialogBox.show();
}
private boolean check_Permissions(){
boolean GRANTED;
if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) +
ContextCompat.checkSelfPermission(this,Manifest.permission.READ_EXTERNAL_STORAGE) +
ContextCompat.checkSelfPermission(this,Manifest.permission.RECORD_AUDIO) +
ContextCompat.checkSelfPermission(this,Manifest.permission.CAMERA)!= PackageManager.PERMISSION_GRANTED){
GRANTED=false;
}
else {
GRANTED=true;
}
return GRANTED;
}
private void request_Permissions(){
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.READ_EXTERNAL_STORAGE,Manifest.permission.CAMERA,Manifest.permission.RECORD_AUDIO},
REQUEST_FOR_PERMISSION);
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode){
case REQUEST_FOR_PERMISSION:
if ((grantResults.length>0)&& (grantResults[0] +grantResults[1]+grantResults[2]+grantResults[3]== PackageManager.PERMISSION_GRANTED)){
if (CAMERA_DIALOG_PERMISSION==1){
OpenCameraDialog();
CAMERA_DIALOG_PERMISSION=0;
}
else if (VIDEO_DIALOG_PERMISSION==1){
OpenVideoDialog();
VIDEO_DIALOG_PERMISSION=0;
}
}
else {
Toast.makeText(this, "Please GRANT Permissions", Toast.LENGTH_SHORT).show();
}
}
}
回答1:
When we will capture the image from Camera in android then Uri or data.getdata() comes null. we have two solutions to resolve this issue.
- We can got the Uri path from the Bitmap Image
- We can got the Uri path from cursor.
I will implement all methods here, Please carefully watch and read these:-
First i will tell how to get Uri from Bitmap Image: Complete code is :
First we will capture image through Intent that will same for both methods so this code i will write one time only here :
// Capture Image
captureImg.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (intent.resolveActivity(getPackageManager()) != null) {
startActivityForResult(intent, reqcode);
}
}
});
Now we will Implement OnActivityResult :-(This will be same for both above 2 methods):-
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode==reqcode && resultCode==RESULT_OK)
{
Bitmap photo = (Bitmap) data.getExtras().get("data");
ImageView.setImageBitmap(photo);
// CALL THIS METHOD TO GET THE URI FROM THE BITMAP
Uri tempUri = getImageUri(getApplicationContext(), photo);
\\ Show Uri path based on Image
Toast.makeText(LiveImage.this,"Here "+ tempUri, Toast.LENGTH_LONG).show();
\\ Show Uri path based on Cursor Content Resolver
Toast.makeText(this, "Real path for URI : "+getRealPathFromURI(tempUri), Toast.LENGTH_SHORT).show();
}
else
{
Toast.makeText(this, "Failed To Capture Image", Toast.LENGTH_SHORT).show();
}
}
\now we will create all above method to create Uri from Image and Cursor methods via classes:
Now URI path from Bitmap Image
private Uri getImageUri(Context applicationContext, Bitmap photo) {
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
photo.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
String path = MediaStore.Images.Media.insertImage(LiveImage.this.getContentResolver(), photo, "Title", null);
return Uri.parse(path);
}
\ Uri from Real path of saved image
public String getRealPathFromURI(Uri uri) {
Cursor cursor = getContentResolver().query(uri, null, null, null, null);
cursor.moveToFirst();
int idx = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
return cursor.getString(idx);
}
Dear Friend copy and paste this code and then try to understood. I'm 100 % sure this will better for you if you are making corporate Apps. If you like my code then vote for me....
回答2:
It is working perfectly on every Phone except Marshmallow and Lollipop
No, it is not. It will fail on lots of Android versions, when the user chooses a well-written camera app to handle your ACTION_IMAGE_CAPTURE request.
Your problem lies here:
if (data.getData()!=null){
picturePath=getPath(column_Name,data.getData());}
else {
//My app Crashes here because in Marshmallow data.getData() is always null.
}
There are at least two flaws here.
The big one is assuming that you get a Uri back from ACTION_IMAGE_CAPTURE. That is not documented, and camera apps do not need to return a Uri. In particular, in your structure, you will only get a thumbnail back, via getExtra("data"). If you want a full-size image, use EXTRA_OUTPUT on your Intent, in which case you know where the image is being stored — it is wherever you are indicating in EXTRA_OUTPUT.
The other one is that you assume that the Uri that you get back is from the MediaStore or otherwise has a MediaStore.Video.Media.DATA column. Not only do camera apps not have to return a Uri, but there is no requirement that the Uri is from the MediaStore or have such a column.
回答3:
As,suggested by @CommonsWare -
Camera App do not need to return uri.
Also,
You need to tell Camera app where to write image.
So, i replaced my code with-
final Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
pictureUri=getOutputMediaFileUri(MEDIA_TYPE_IMAGE);
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT,pictureUri);
startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
and in onActivityResult -
case REQUEST_IMAGE_CAPTURE:
if (resultCode==RESULT_OK){
String picturePath="";
String column_Name= MediaStore.Images.Media.DATA;
if (data!=null){
if (data.getData()!=null){
picturePath=getPathfromUri(column_Name,data.getData());}
else {
picturePath= pictureUri.getPath();
}
}
else {
picturePath= pictureUri.getPath();
}}
来源：https://stackoverflow.com/questions/39595914/onactivityresult-returning-intent-data-getdata-always-null-only-in-marshmallo