捕获的图像不显示在 ImageView 上
Captured image does not display on ImageView
在我的ActivityA中,有一个ImageView
和一个Button
。单击该按钮时,它会转到 activeTakePhoto()
。 imgUri 得到显示,但我的 ImageView
.
中没有显示任何内容
private void activeTakePhoto() {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
String fileName = "temp.jpg";
ContentValues values = new ContentValues();
values.put(MediaStore.Images.Media.TITLE, fileName);
mCapturedImageURI = getContentResolver()
.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
values);
takePictureIntent
.putExtra(MediaStore.EXTRA_OUTPUT, mCapturedImageURI);
startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode,
Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case RESULT_LOAD_IMAGE:
if (requestCode == RESULT_LOAD_IMAGE &&
resultCode == RESULT_OK && null != data) {
Uri selectedImage = data.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 picturePath = cursor.getString(columnIndex);
cursor.close();
}
case REQUEST_IMAGE_CAPTURE:
if (requestCode == REQUEST_IMAGE_CAPTURE &&
resultCode == RESULT_OK) {
File picture = new File(Environment.getExternalStorageDirectory() + "/temp.jpg");
ImageView imgView=(ImageView)findViewById(R.id.imageView);
Uri imgUri=Uri.fromFile(picture);
imgView.setImageURI(imgUri);
Toast.makeText(getApplication(),imgUri+"",Toast.LENGTH_LONG).show();
}
}
}
在主动拍照
替换
String fileName = "temp.jpg";
和
fileName=Environment.getExternalStorageDirectory().getAbsolutePath() + "/temp.jpg"
您可以试试这段代码,它可能会有所帮助:
@Override
public void onClick(View v) {
if (v == imgCamera) {
Toast.makeText(getApplicationContext(), "open camera", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, CAMERA_REQUEST);
}
}//on click
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Log.e("RESULT CODE", "--" + resultCode);
if (resultCode == RESULT_OK) {
Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
thumbnail.compress(Bitmap.CompressFormat.JPEG, 90, bytes);
//to generate random file name
String fileName = "tempimg.jpg";
try {
Bitmap photo = (Bitmap) data.getExtras().get("data");
//captured image set in imageview
imageView.setImageBitmap(photo);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
在我的ActivityA中,有一个ImageView
和一个Button
。单击该按钮时,它会转到 activeTakePhoto()
。 imgUri 得到显示,但我的 ImageView
.
private void activeTakePhoto() {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
String fileName = "temp.jpg";
ContentValues values = new ContentValues();
values.put(MediaStore.Images.Media.TITLE, fileName);
mCapturedImageURI = getContentResolver()
.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
values);
takePictureIntent
.putExtra(MediaStore.EXTRA_OUTPUT, mCapturedImageURI);
startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode,
Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case RESULT_LOAD_IMAGE:
if (requestCode == RESULT_LOAD_IMAGE &&
resultCode == RESULT_OK && null != data) {
Uri selectedImage = data.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 picturePath = cursor.getString(columnIndex);
cursor.close();
}
case REQUEST_IMAGE_CAPTURE:
if (requestCode == REQUEST_IMAGE_CAPTURE &&
resultCode == RESULT_OK) {
File picture = new File(Environment.getExternalStorageDirectory() + "/temp.jpg");
ImageView imgView=(ImageView)findViewById(R.id.imageView);
Uri imgUri=Uri.fromFile(picture);
imgView.setImageURI(imgUri);
Toast.makeText(getApplication(),imgUri+"",Toast.LENGTH_LONG).show();
}
}
}
在主动拍照
替换
String fileName = "temp.jpg";
和
fileName=Environment.getExternalStorageDirectory().getAbsolutePath() + "/temp.jpg"
您可以试试这段代码,它可能会有所帮助:
@Override
public void onClick(View v) {
if (v == imgCamera) {
Toast.makeText(getApplicationContext(), "open camera", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, CAMERA_REQUEST);
}
}//on click
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Log.e("RESULT CODE", "--" + resultCode);
if (resultCode == RESULT_OK) {
Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
thumbnail.compress(Bitmap.CompressFormat.JPEG, 90, bytes);
//to generate random file name
String fileName = "tempimg.jpg";
try {
Bitmap photo = (Bitmap) data.getExtras().get("data");
//captured image set in imageview
imageView.setImageBitmap(photo);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}