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私はCameraActivityを開くCardActivityを持っています。私はイメージボタンを押して、ネイティブのカメラアプリが開き、写真を撮ることができます。私はByteArrayでインテントを使ってCardActivityに戻します。しかしそれは私に白い空白の画面を与えます。それは画像ビューに何も挿入しません。 Bitmap要素はnullではなく、何かを持っています。SetImageBitmapは白い空白の全画面を表示します
これはカメラの活動を開始し、画像を設定するための私のスイッチである。
switch (v.getId()) {
case R.id.pButton1:
Intent cam = new Intent(CardActivity.this, CameraActivity.class);
startActivity(cam);
returnImage2();
mImageView = (ImageView)findViewById(R.id.imageView);
mImageView.setImageBitmap(bitmap);
mImageView.setRotation(180);
break;
これは私returnImage2(です)。
public void returnImage2() {
try {
bitmap = BitmapFactory.decodeStream(this.openFileInput("myImage"));
}
catch (Exception e) {
e.printStackTrace();
}
}
これは私のcameraActivityです:
public class CameraActivity extends Activity {
private String mCurrentPhotoPath;
private ImageView mImageView;
private Bitmap mImageBitmap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
dispatchTakePictureIntent();
}
public 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
System.out.println("ERR CANNOT CREATE FILE");
}
// 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_TAKE_PHOTO);
}
}
}
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
mCurrentPhotoPath = "file:" + image.getAbsolutePath();
return image;
}
private File createImageFile2() 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
mCurrentPhotoPath = "file:" + image.getAbsolutePath();
return image;
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
try {
mImageBitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), Uri.parse(mCurrentPhotoPath));
cImageFromBitmap(mImageBitmap);
//mImageView = (ImageView)findViewById(R.id.imageView);
//mImageView.setImageBitmap(mImageBitmap);
//mImageView.setRotation(180);
} catch (IOException e) {
e.printStackTrace();
}
}
}
public String cImageFromBitmap(Bitmap bitmap){
String fileName = "myImage";//no .png or .jpg needed
try {
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
FileOutputStream fo = openFileOutput(fileName, Context.MODE_PRIVATE);
fo.write(bytes.toByteArray());
// remember close file output
fo.close();
} catch (Exception e) {
e.printStackTrace();
fileName = null;
}
return fileName;
}
}
私は、この作品のすべてを通過する理由れる1 MB以上のインテントを処理するために:私はその部分を削除した場合/私はまだ白い画面を取得しますifチェック – NicklasN