I am trying to implement google's code from https://developer.android.com/training/camera/photobasics however I am a little bit stuck.
This is my MainActivity:
package com.example.storage_thingy;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.FileProvider;
import android.Manifest;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;
import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
public class MainActivity extends AppCompatActivity {
ImageView imageView;
Button saveimage;
Button takephoto;
static final int REQUEST_IMAGE_CAPTURE = 1;
String currentPhotoPath;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
imageView = findViewById(R.id.imageview);
saveimage = findViewById(R.id.savegallery);
takephoto = findViewById(R.id.takephoto);
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},1);
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},1);
saveimage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
saveToGallery();
}
});
takephoto.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
dispatchTakePictureIntent();
}
});
}
private File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
// Save a file: path for use with ACTION_VIEW intents
currentPhotoPath = image.getAbsolutePath();
return image;
}
private void dispatchTakePictureIntent() {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// Ensure that there's a camera activity to handle the intent
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
// Create the File where the photo should go
File photoFile = null;
try {
photoFile = createImageFile();
} catch (IOException ex) {
// Error occurred while creating the File
Context context = getApplicationContext();
CharSequence text = "IOException!";
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, text, duration);
toast.show();
}
// Continue only if the File was successfully created
if (photoFile != null) {
Uri photoURI = FileProvider.getUriForFile(this,
"com.example.android.fileprovider",
photoFile);
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
}
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
Bundle extras = data.getExtras();
Bitmap imageBitmap = (Bitmap) extras.get("data");
imageView.setImageBitmap(imageBitmap);
}
}
private void saveToGallery(){
Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
File f = new File(currentPhotoPath);
Uri contentUri = Uri.fromFile(f);
mediaScanIntent.setData(contentUri);
this.sendBroadcast(mediaScanIntent);
}
}
Then the Manifest file:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.storage_thingy">
<uses-feature android:name="android.hardware.camera" android:required="true" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/Theme.Storage_thingy">
<activity
android:name=".MainActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="com.example.android.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_paths"></meta-data>
</provider>
</application>
</manifest>
And then the file_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths> xmlns:android="http://schemas.android.com/apk/res/android">
<external-files-path name="files" path="." />
</paths>
I keep getting a RunTime Exception saying that the data in the onActivityResult method is null, however I do not understand why? Any ideas?
Just replace :
Bundle extras = data.getExtras();
Bitmap imageBitmap = (Bitmap) extras.get("data");
imageView.setImageBitmap(imageBitmap);
With :
imageView.setImageURI(Uri.fromFile(photoFile));
Change the saveToGallery method as well as createImageFile :
private File createImageFile() throws IOException {
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
File storageDir = Build.VERSION.SDK_INT < Build.VERSION_CODES.Q ? Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES) : getExternalFilesDir(Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
currentPhotoPath = image.getAbsolutePath();
return image;
}
private void saveToGallery() {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
intent.setData(Uri.parse("file://" + photoFile.getAbsolutePath()));
sendBroadcast(intent);
} else {
ContentValues contentValues = new ContentValues();
contentValues.put(MediaStore.Images.Media.DISPLAY_NAME, photoFile.getName());
contentValues.put(MediaStore.Images.Media.MIME_TYPE, "image/*");
Uri contentUri;
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
} else {
contentUri = MediaStore.Images.Media.INTERNAL_CONTENT_URI;
}
contentValues.put(MediaStore.Images.Media.RELATIVE_PATH, Environment.DIRECTORY_PICTURES);
contentValues.put(MediaStore.MediaColumns.IS_PENDING, 1);
Uri uri = getContentResolver().insert(contentUri, contentValues);
OutputStream os = null;
try {
Bitmap bitmap = BitmapFactory.decodeFile(photoFile.getAbsolutePath());
os = getContentResolver().openOutputStream(uri);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, os);
contentValues.clear();
contentValues.put(MediaStore.MediaColumns.IS_PENDING, 0);
getContentResolver().update(uri, contentValues, null, null);
} catch (Exception e) {
getContentResolver().delete(uri, null, null);
e.printStackTrace();
} finally {
try {
if (os != null) {
os.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
mediaScanIntent.setData(contentUri);
this.sendBroadcast(mediaScanIntent);
}
}
And the file_path.xml to :
<?xml version="1.0" encoding="utf-8"?>
<paths>
<external-path name="external" path="." />
<external-files-path name="external_files" path="." />
<cache-path name="cache" path="." />
<external-cache-path name="external_cache" path="." />
<files-path name="files" path="." />
</paths>
I've tested it on Android 11 and Android 5.1.1 both works, I was able to see the captured image in my gallery.