I`m trying to create bar code reader for my app, and it works fine, but the problem is when I keep focusing on QR-Code, it continues to read and never stops!!!
How can I make this happen only once?
In this code, it continues to "Toast" until I close the app, and when I use Intent for for closing the current activity and open another activity, the activity opens several times!!!
Here is the code:
public class BarcodeCaptureActivity extends AppCompatActivity {
private SurfaceView camera_preview;
TextView text;
BarcodeDetector barcodeDetector;
CameraSource cameraSource;
final int requestCameraPermissionID = 1001;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_barcode_capture);
camera_preview = (SurfaceView) findViewById(R.id.camera_preview);
text = (TextView) findViewById(R.id.text);
barcodeDetector = new BarcodeDetector.Builder(this).setBarcodeFormats(Barcode.QR_CODE).build();
cameraSource = new CameraSource.Builder(this, barcodeDetector).setRequestedPreviewSize(640, 480).build();
camera_preview.getHolder().addCallback(new SurfaceHolder.Callback() {
#Override
public void surfaceCreated(SurfaceHolder holder) {
if (ActivityCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(BarcodeCaptureActivity.this, new String[]{Manifest.permission.CAMERA},requestCameraPermissionID);
return;
}
try {
cameraSource.start(camera_preview.getHolder());
} catch (IOException e) {
e.printStackTrace();
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
cameraSource.stop();
}
});
barcodeDetector.setProcessor(new Detector.Processor<Barcode>() {
#Override
public void release() {
}
#Override
public void receiveDetections(Detector.Detections<Barcode> detections) {
final SparseArray<Barcode> qrcode = detections.getDetectedItems();
if (qrcode.size() != 0){
text.post(new Runnable() {
#Override
public void run() {
Vibrator vibrator = (Vibrator) getApplicationContext().getSystemService(Context.VIBRATOR_SERVICE);
vibrator.vibrate(1000);
text.setText(qrcode.valueAt(0).displayValue);
String title = text.getText().toString();
Toast.makeText(BarcodeCaptureActivity.this, "" + title, Toast.LENGTH_SHORT).show();
finish();
}
});
}
}
});
}
Thank for any help...
UPDATE
Problem solved with adding onDestroy and onPause methods...
#Override
protected void onPause() {
super.onPause();
cameraSource.stop();
}
#Override
protected void onDestroy() {
super.onDestroy();
cameraSource.stop();
}
Related
I'm using Wowza streaming cloud it works fine using HLS link on the web but an android device not working on the web view.can you anyone me how its work.
And rtsp live link also not working on android device
public class AnotherOne extends AppCompatActivity implements
SurfaceHolder.Callback, MediaPlayer.OnPreparedListener{
private String Downloadurl;
private int playminute;
private SurfaceView mSurfaceView;
private MediaPlayer mMediaPlayer;
private SurfaceHolder mSurfaceHolder;
ProgressBar p_bar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_another_one);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
View decorView = getWindow().getDecorView();
int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_FULLSCREEN;
decorView.setSystemUiVisibility(uiOptions);
Downloadurl = "https://7c6ad8.entrypoint.cloud.wowza.com/app-04be/ngrp:f23a3900_all/playlist.m3u8";
// Description = getIntent().getStringExtra("Description");
Log.e("kanish","Download Url inside player:"+Downloadurl);
mSurfaceView = (SurfaceView) findViewById(R.id.surfaceView);
mSurfaceHolder = mSurfaceView.getHolder();
mSurfaceHolder.addCallback(this);
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
// p_bar.setVisibility(View.VISIBLE);
mMediaPlayer = new MediaPlayer();
mMediaPlayer.setDisplay(mSurfaceHolder);
try {
mMediaPlayer.setDataSource(Downloadurl);
mMediaPlayer.prepare();
mMediaPlayer.setOnPreparedListener(AnotherOne.this);
//mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
} catch (IOException e) {
e.printStackTrace();
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
}
#Override
public void onBackPressed() {
super.onBackPressed();
}
#Override
public void onPrepared(MediaPlayer mp) {
//p_bar.setVisibility(View.GONE);
mMediaPlayer.start();
}
#Override
protected void onPause() {
super.onPause();
releaseMediaPlayer();
}
#Override
protected void onDestroy() {
super.onDestroy();
releaseMediaPlayer();
}
private void releaseMediaPlayer() {
if (mMediaPlayer != null) {
mMediaPlayer.release();
mMediaPlayer = null;
}
}
}
you need to declare a view to render video View and
You need to use Media Player Api Provided by Android to Stream m3u8.it is pretty Simple to play Live content follow this code.
public class PlayerActivity extends AppCompatActivity implements
SurfaceHolder.Callback, MediaPlayer.OnPreparedListener {
private String Downloadurl;
private int playminute;
private SurfaceView mSurfaceView;
private MediaPlayer mMediaPlayer;
private SurfaceHolder mSurfaceHolder;
ProgressBar p_bar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.player);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
View decorView = getWindow().getDecorView();
int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_FULLSCREEN;
decorView.setSystemUiVisibility(uiOptions);
Downloadurl = "YOUR M3U8 URL";
// Description = getIntent().getStringExtra("Description");
Log.e("kanish","Download Url inside player:"+Downloadurl);
mSurfaceView = (SurfaceView) findViewById(R.id.surface_view);
mSurfaceHolder = mSurfaceView.getHolder();
mSurfaceHolder.addCallback(PlayerActivity.this);
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
p_bar.setVisibility(View.VISIBLE);
mMediaPlayer = new MediaPlayer();
mMediaPlayer.setDisplay(mSurfaceHolder);
try {
mMediaPlayer.setDataSource(Downloadurl);
mMediaPlayer.prepare();
mMediaPlayer.setOnPreparedListener(PlayerActivity.this);
//mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
} catch (IOException e) {
e.printStackTrace();
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
}
#Override
public void onBackPressed() {
super.onBackPressed();
}
#Override
public void onPrepared(MediaPlayer mp) {
p_bar.setVisibility(View.GONE);
mMediaPlayer.start();
}
#Override
protected void onPause() {
super.onPause();
releaseMediaPlayer();
}
#Override
protected void onDestroy() {
super.onDestroy();
releaseMediaPlayer();
}
private void releaseMediaPlayer() {
if (mMediaPlayer != null) {
mMediaPlayer.release();
mMediaPlayer = null;
}
}
}
Let me Know if it helps.
I am using the com.google.android.gms.vision dependency to scan a QR-code.
The problem I am facing is that it keeps scanning the QR-code again and again. I want it to scan only once.
Here is my code :
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final SurfaceView cameraView = (SurfaceView) findViewById(R.id.camera_view);
final TextView barcodeInfo = (TextView) findViewById(R.id.code_info);
barcodeDetector =
new BarcodeDetector.Builder(this)
.setBarcodeFormats(Barcode.QR_CODE)
.build();
cameraSource = new CameraSource
.Builder(this, barcodeDetector)
.setAutoFocusEnabled(true)
.setRequestedPreviewSize(640, 640)
.build();
cameraView.getHolder().addCallback(new SurfaceHolder.Callback() {
#Override
public void surfaceCreated(SurfaceHolder holder) {
try {
if (ActivityCompat.checkSelfPermission(getApplicationContext(), android.Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
cameraSource.start(cameraView.getHolder());
} catch (IOException ie) {
Log.e("CAMERA SOURCE", ie.getMessage());
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
cameraSource.stop();
}
});
barcodeDetector.setProcessor(new Detector.Processor<Barcode>() {
#Override
public void release() {
}
#Override
public void receiveDetections(Detector.Detections<Barcode> detections) {
final SparseArray<Barcode> barcodes = detections.getDetectedItems();
if (barcodes.size() != 0) {
barcodeInfo.post(new Runnable() { // Use the post method of the TextView
public void run() {
barcodeInfo.setText( // Update the TextView
barcodes.valueAt(0).displayValue
);
QRData = barcodeInfo.getText().toString().trim();
Log.d("TAG", barcodeInfo.getText().toString().trim());
}
});
}
}
});
Just set result and call finish when your scan is completed in that activity. After that you need to catch result in parent activity (onActivityResult).
PS. You need to start QRScanner activity with startActivityForResult.
Edit: If QRScan is the same activity stop camera. And maybe you need to hide that surface.
Cheers :)
I'm trying to create a real time QR Code decoder which allows user to confirm/cancel data read from the camera view.
(Of course, according confirmation or cancelation, it will execute some code...)
But there's a bad point:
The app I coded keeps reading qr code data even while in dialog and I can't find a way to prevent it.
Here is my main activity:
public class MainReadActivity extends Activity {
private SurfaceView cameraView;
private TextView barcodeInfo;
private BarcodeDetector barcodeDetector;
private CameraSource cameraSource;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_read);
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
cameraView = (SurfaceView) findViewById(R.id.camera_view);
cameraView.requestFocus();
barcodeInfo = (TextView) findViewById(R.id.code_info);
barcodeDetector = new BarcodeDetector.Builder(this).setBarcodeFormats(Barcode.QR_CODE).build();
cameraSource = new CameraSource.Builder(this, barcodeDetector).build();
cameraView.getHolder().addCallback(new SurfaceHolder.Callback() {
#Override
public void surfaceCreated(SurfaceHolder holder) {
try {
cameraSource.start(cameraView.getHolder());
} catch (IOException ie) {
Log.e("CAMERA SOURCE", ie.getMessage());
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
cameraSource.stop();
}
});
barcodeDetector.setProcessor(new Detector.Processor<Barcode>() {
#Override
public void release() {
}
#Override
public void receiveDetections(Detector.Detections<Barcode> detections) {
final SparseArray<Barcode> barcodes = detections.getDetectedItems();
if (barcodes.size() != 0) {
barcodeInfo.post(new Runnable() { // Use the post method of the TextView
public void run() {
ConfirmationDialogFragment myDialog = new ConfirmationDialogFragment();
myDialog.show(getFragmentManager(),"");
barcodeInfo.setVisibility(View.VISIBLE);
barcodeInfo.setText(barcodes.valueAt(0).displayValue);
}
});
}
}
});
}
And here is my DialogFragment:
public class ConfirmationDialogFragment extends DialogFragment {
public Dialog ConfirmationDialogFragment(Bundle savedInstanceState){
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
LayoutInflater inflater = getActivity().getLayoutInflater();
View v = inflater.inflate(R.layout.dialog_confirmation,null);
builder.setView(v);
Dialog dialog = builder.create();
return dialog;
}
}
Can anyone help me?
Bests,
P.
Stop and start camera on barcodeDetector callback
barcodeDetector.setProcessor(new Detector.Processor<Barcode>() {
#Override
public void release() {
}
#Override
public void receiveDetections(Detector.Detections<Barcode> detections) {
final SparseArray<Barcode> barcodes = detections.getDetectedItems();
if (barcodes.size() != 0) {
cameraSource.stop();
barcodeInfo.post(new Runnable() { // Use the post method of the TextView
public void run() {
builder
.setMessage("Are you sure you want to reset the count?")
.setNegativeButton("No", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface arg0, int arg1) {
cameraSource.start(cameraView.getHolder());
}
})
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface arg0, int arg1) {
Toast.makeText(MainActivity.this, "Did Reset!", 5).show();
}
})
.create();
barcodeInfo.setVisibility(View.VISIBLE);
barcodeInfo.setText(barcodes.valueAt(0).displayValue);
}
});
}
}
});
I think that you forget some like this.
builder.setPositiveButton(Ok, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss(); //this close the dialog.
}
});
builder.setNegativeButton(Back, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
///do another thing
}
});
I hope this help you
just call the Camera.release() method after detection
#Override
public void receiveDetections(Detector.Detections < TextBlock > detections) {
final SparseArray < TextBlock > items = detections.getDetectedItems();
if (items.size() != 0) {
mTextView.post(new Runnable() {
#Override
public void run() {
StringBuilder stringBuilder = new StringBuilder();
for (int i = 0; i < items.size(); i++) {
TextBlock item = items.valueAt(i);
stringBuilder.append(item.getValue());
stringBuilder.append("\n");
}
mTextView.setText(stringBuilder.toString());
mCameraSource.release();
}
});
}
}
I am trying to open a camera preview but I get an
FATAL EXCEPTION: AsyncTask #1 java.lang.RuntimeException: An error
occured while executing doInBackground()
Below is my code:
public class ScanActivity extends Activity implements SurfaceHolder.Callback, OnClickListener {
private SurfaceHolder surface_holder;
protected Camera camera;
protected boolean scanning;
private Animation laser_effect;
private Animation flash_effect;
public static final class id {
public static final int quit = 0;
public static final int found = 1;
public static final int nothing = 2;
public static final int error = 3;
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_scan);
findViewById(R.id.capture_button).setOnClickListener(this);![enter image description here][1]
}
#Override
protected void onResume() {
super.onResume();
/* open camera if any, returns error otherwise */
camera = Camera.open();
if (camera == null) {
Intent error = new Intent();
error.putExtra("reason", "Camera Error");
setResult(id.error, error);
finish();
}
restartView();
surface_holder = ((SurfaceView) findViewById(R.id.surface_view)).getHolder();
surface_holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
surface_holder.addCallback(this);
}
#Override
protected void onPause() {
this.scanning=false;
/* release camera */
camera.cancelAutoFocus();
camera.stopPreview();
camera.release();
super.onPause();
}
private void restartView() {
findViewById(R.id.freeze).setVisibility(View.GONE);
findViewById(R.id.loading).setVisibility(View.GONE);
findViewById(R.id.capture_button).setVisibility(View.VISIBLE);
findViewById(R.id.surface_view).setVisibility(View.VISIBLE);
findViewById(R.id.camera_loading).setVisibility(View.GONE);
}
#Override
public void onClick(View v) {
switch(v.getId()) {
case R.id.capture_button:
scanning = true;
break;
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
// void implementation
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
findViewById(R.id.camera_loading).setVisibility(View.VISIBLE);
//we use an AsyncTask to avoid ugly lag when camera is loading...
new InitCamera().execute(holder);
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
// void implementation
}
private class InitCamera extends AsyncTask<SurfaceHolder, Void, Boolean> {
#Override
protected Boolean doInBackground(SurfaceHolder... holder) {
/* initialize camera parameters and start Preview */
Rect dim = holder[0].getSurfaceFrame();
int w = dim.width();
int h = dim.height();
Camera.Parameters params = camera.getParameters();
params.setPreviewSize(w, h);
camera.setParameters(params);
try {
camera.setPreviewDisplay(surface_holder);
} catch (IOException e) {
e.printStackTrace();
}
camera.startPreview();
return true;
}
#Override
protected void onPostExecute(Boolean a) {
findViewById(R.id.camera_loading).setVisibility(View.GONE);
}
}
}
Most likely, the problem comes from trying to manipulate the UI from a non-UI thread. Examining your stack trace would help confirm this theory. AFAIK, the work that you are doing in doInBackground() should be performed on the main application thread.
I am creating a video player using MediaPlayer class in android. I set a SurfaceHolder in MediaPlayer.setDisplay(), it shows video successfully but when this activity resumed again then no video is diplayed. So what is wrong ??
The Code is:
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
player = new MediaPlayer();
surface = (SurfaceView)findViewById(R.id.surface);
surface.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v)
{
VideoDemo.this.startActivity(new Intent(VideoDemo.this, AnotherActivity.class));//Video not displayed when return from this activity by pressing back button
}
});
holder = surface.getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
try
{
String songName = Environment.getExternalStorageDirectory().toString()+File.separator+"1.mp4";
player.setDataSource(songName);
player.prepare();
player.start();
}
catch (Exception e)
{
e.printStackTrace();
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height)
{
player.setDisplay(holder);
}
#Override
public void surfaceCreated(SurfaceHolder holder)
{
Log.d(TAG, "surfaceCreated() is called ************ holder.getSurface() = "+holder.getSurface());
}
#Override
public void surfaceDestroyed(SurfaceHolder holder)
{
Log.d(TAG, "surfaceDestroyed() is called ************");
}
I have initialized media player again and now its working fine