Develop Reference

It is Possible to send Image from SurfaceView to Server?

I want make the camera always send picture when captured from SurfaceView.
This is my Code for SurfaceView.
public class CustomCamera extends AppCompatActivity implements SurfaceHolder.Callback,Camera.PictureCallback, Camera.ShutterCallback {
Camera camera;
SurfaceView mPreview;
int count = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_custom_camera);
mPreview = (SurfaceView) findViewById(R.id.preview);
mPreview.getHolder().addCallback(this);
mPreview.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
camera = Camera.open();
final Handler handler = new Handler();
final Runnable runnable = new Runnable() {
#Override
public void run() {
AutomatedPicture();
count++;
}
};
final Timer autoCapture = new Timer();
autoCapture.schedule(new TimerTask() {
#Override
public void run() {
if (count != 3) {
AudioManager mgr = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
mgr.setStreamMute(AudioManager.STREAM_SYSTEM, false);
handler.post(runnable);
}else {
autoCapture.cancel();
finish();
Toast.makeText(getApplicationContext(),"Verify failed",Toast.LENGTH_LONG).show();
camera.release();
}
}
},500,5000);
}
#Override
protected void onPause() {
super.onPause();
camera.stopPreview();
}
#Override
protected void onDestroy() {
super.onDestroy();
camera.release();
Log.d("Camera","Destroy");
}
public void onCancelClick(View v){
camera.release();
finish();
}
public void onSnapClick(View v){
camera.takePicture(this, null, null, this);
}
public void AutomatedPicture(){
camera.takePicture(this,null,null,this);
}
#Override
public void onPictureTaken(byte[] data, Camera camera) {
try{FileOutputStream out = openFileOutput("picture"+count+".jpg", Activity.MODE_PRIVATE);
out.write(data);
out.flush();
out.close(); } catch (FileNotFoundException e) {
Log.e("Error",e.getMessage());
}catch (IOException e){
Log.e("Error",e.getMessage());
}
camera.startPreview();
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
try{
camera.setPreviewDisplay(mPreview.getHolder());
} catch (IOException e) {
Log.e("Error",e.getMessage());
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
Camera.Parameters params = camera.getParameters();
List<Camera.Size> sizes = params.getSupportedPictureSizes();
Camera.Size selected = sizes.get(0);
params.setPreviewSize(selected.width,selected.height);
camera.setParameters(params);
camera.setDisplayOrientation(90);
camera.startPreview();
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
Log.i("PREVIew","Surface Destroyed");
}
#Override
public void onShutter() {
AudioManager mgr = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
mgr.setStreamMute(AudioManager.STREAM_SYSTEM, true);
}
and this is my XML.
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.simasjiwa.sijiku.CustomCamera">
<SurfaceView
android:id="#+id/preview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintRight_toRightOf="parent" />
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="100dip"
android:layout_alignParentBottom="true"
android:gravity="center_vertical"
android:background="#A000">>
<Button
android:id="#+id/button2"
android:layout_width="100dip"
android:layout_height="wrap_content"
android:onClick="onCancelClick"
android:text="Cancel" />
<Button
android:id="#+id/button3"
android:layout_width="100dip"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:onClick="onSnapClick"
android:text="Snap Photo" />
</RelativeLayout>
</android.support.constraint.ConstraintLayout>
And my question is it is possible to make the surface View send data to server when the picture captured every 5 second?
If possible what method must i use or function?
Thank You before.

If you are extending SurfaceView, use this method inside your class.
public Bitmap getBitmap() {
setDrawingCacheEnabled(true);
buildDrawingCache(true);
final Bitmap bitmap = Bitmap.createBitmap(getDrawingCache());
setDrawingCacheEnabled(false);
destroyDrawingCache();
return bitmap;
}
Without extending, it would look like this:
public Bitmap getBitmap(SurfaceView surfaceView) {
surfaceView.setDrawingCacheEnabled(true);
surfaceView.buildDrawingCache(true);
final Bitmap bitmap = Bitmap.createBitmap(surfaceView.getDrawingCache());
surfaceView.setDrawingCacheEnabled(false);
surfaceView.destroyDrawingCache();
return bitmap;
}
I haven't tested it without extending SurfaceView.

android scan barcode from camera with google barcode api (what is missing?)

in my app dependencies i have
compile 'com.google.android.gms:play-services:11.0.4'
in manifest file i have
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
this is my activity_main.xml file
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="cameratest.test.hasan.com.barcodetest.MainActivity">
<EditText
android:id="#+id/editText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="text"
android:text="Name"
android:layout_marginTop="107dp"
android:layout_marginEnd="39dp" />
<RelativeLayout
android:id="#+id/cameraHolder"
android:layout_width="176dp"
android:layout_height="144dp"
android:layout_marginEnd="75dp"
android:layout_marginTop="74dp"
android:keepScreenOn="true"></RelativeLayout>
</RelativeLayout>
MainActivity.java
public class MainActivity extends AppCompatActivity {
CameraSurface cameraSurface;
RelativeLayout relativeLayout;
EditText etBarkod ;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
etBarkod = (EditText)findViewById(R.id.editText);
etBarkod.setOnEditorActionListener(new BarkodEditorActionListener(this.getBaseContext()));
relativeLayout = (RelativeLayout)findViewById(R.id.cameraHolder);
relativeLayout.setOnTouchListener(new MovingViewListener());
cameraSurface = new CameraSurface(this.getBaseContext());
cameraSurface.setBarkodEditText(etBarkod);
relativeLayout.addView(cameraSurface);
}
}
and CameraSurface.java class is
public class CameraSurface extends SurfaceView implements SurfaceHolder.Callback {
Context context;
Camera mCamera;
CameraSource cameraSource;
SurfaceHolder msurfaceHolder;
EditText etBarkod;
public CameraSurface(Context context) {
super(context);
super.setKeepScreenOn(true);
this.context = context;
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,RelativeLayout.LayoutParams.MATCH_PARENT);
super.setLayoutParams(params);
msurfaceHolder = this.getHolder();
msurfaceHolder.addCallback(this);
msurfaceHolder.setKeepScreenOn(true);
msurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
attachBarcodeDetector();
}
#Override
public void surfaceCreated(SurfaceHolder surfaceHolder) {
mCamera = Camera.open(Camera.CameraInfo.CAMERA_FACING_BACK);
try {
mCamera.setPreviewDisplay(msurfaceHolder);
mCamera.startPreview();
} catch (Exception e) {
e.printStackTrace();
}
Camera.Parameters param;
param = mCamera.getParameters();
param.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
param.setPreviewFrameRate(0);
param.setPreviewSize(176, 144);
mCamera.setParameters(param);
try {
//noinspection MissingPermission
cameraSource.start(msurfaceHolder);
} catch (IOException e) {
e.printStackTrace();
}
}
private void attachBarcodeDetector(){
BarcodeDetector barcodeDetector =
new BarcodeDetector.Builder(context)
.setBarcodeFormats(Barcode.ALL_FORMATS)
.build();
cameraSource = new CameraSource
.Builder(context, barcodeDetector)
.setRequestedPreviewSize(176, 144)
.setAutoFocusEnabled(true)
.build();
barcodeDetector.setProcessor(new Detector.Processor<Barcode>() {
#Override
public void release() {
}
#Override
public void receiveDetections(Detector.Detections<Barcode> detections) {
final EditText barkod= etBarkod;
final SparseArray<Barcode> barcodes = detections.getDetectedItems();
if (barcodes.size() != 0) {
barkod.post(new Runnable() { // Use the post method of the TextView
public void run() {
barkod.setText( // Update the TextView
barcodes.valueAt(0).displayValue
);
}
});
}
}
});
}
#Override
public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i1, int i2) {
}
#Override
public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
cameraSource.stop();
}
public EditText setBarkodEditText(EditText editText){
return this.etBarkod = editText;
}
}
Camera works fine , focuses fine supports defined preview size,but barcode detector does not detect barcodes and because of this edittext value does not change .
Note:this code was working perfectly and i dont really know what i have changed but after that it is not working anymore.
I am trying to understand what is wrong with this code but i cannot figure it out.
So I need your help.
thanks in advance.

Check this may help you:
private void scanBarcode() {
mCameraView.setZOrderMediaOverlay(true);
mHolder = mCameraView.getHolder();
mBarcode = new BarcodeDetector.Builder(this).setBarcodeFormats(Barcode.ALL_FORMATS | Barcode.EAN_13 | Barcode.EAN_8 | Barcode.UPC_A | Barcode.UPC_E | Barcode.CODE_39 | Barcode.CODE_93 |
Barcode.CODE_128 | Barcode.ITF | Barcode.CODABAR | Barcode.ISBN | Barcode.QR_CODE | Barcode.DATA_MATRIX | Barcode.PDF417 | Barcode.AZTEC).build();
if (!mBarcode.isOperational()) {
Toast.makeText(getApplicationContext(), "Sorry,Couldn't setup the detector", Toast.LENGTH_LONG).show();
this.finish();
}
mCameraSource = new CameraSource.Builder(this, mBarcode)
.setFacing(CameraSource.CAMERA_FACING_BACK)
.setRequestedFps(15.0f)
.setAutoFocusEnabled(true)
.setRequestedPreviewSize(1600, 1024)
.build();
mCameraView.getHolder().addCallback(new SurfaceHolder.Callback() {
#Override
public void surfaceCreated(SurfaceHolder holder) {
try {
if (ContextCompat.checkSelfPermission(ScanActivity.this, Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED) {
mCameraSource.start(mCameraView.getHolder());
} else {
ActivityCompat.requestPermissions(ScanActivity.this, new String[]{Manifest.permission.CAMERA}, PERMISSION_REQUEST);
}
} catch (IOException e) {
e.printStackTrace();
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
mCameraSource.stop();
}
});
mBarcode.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) {
barkod.setText(barcodes.valueAt(0));
}
}
});
}

Please Do Querying the Detector Operational Status using method isOperational ()
if (!detector.isOperational()) {
}

An error occurred while connecting to camera: 0

I'm making a flashlight application that starts when the user shakes their phone or presses the button on the app. When I open app and press the button in the application works, when I go back to home and shake the phone the app still works like it's supposed to but when I open the app and press the button it doesn't work. It says in my log cat
"CameraBase(20450): An error occurred while connecting to camera: 0
Camera Error. Failed to Open. Error:(20450): Fail to connect to camera service"
Here is my Main Activity.java
public class MainActivity extends Activity {
private ToggleButton togle;
private Camera camera;
private boolean isFlashOn;
private boolean hasFlash;
Parameters params;
private ShakeListener mShaker;
MediaPlayer mp;
ImageView anime;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
anime = (ImageView) findViewById(R.id.Animation);
hasFlash = getApplicationContext().getPackageManager()
.hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH);
if (!hasFlash) {
// device doesn't support flash
// Show alert message and close the application
AlertDialog alert = new AlertDialog.Builder(MainActivity.this)
.create();
alert.setTitle("Error");
alert.setMessage("Sorry, your device doesn't support flash light!");
alert.setButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// closing the application
finish(); }
});
alert.show();
return;}
getCamera();
togle = (ToggleButton) findViewById(R.id.ToggleButton01);
togle.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
boolean checked = ((ToggleButton) v).isChecked();
if (checked){
turnOffFlash(); }
else{
turnOnFlash();
}
}
});
mShaker = new ShakeListener(this);
mShaker.setOnShakeListener(new ShakeListener.OnShakeListener () {
public void onShake()
{ if (!isFlashOn) {
Toast.makeText(MainActivity.this, "On" , Toast.LENGTH_SHORT).show();
turnOnFlash();
}
else{
turnOffFlash();
Toast.makeText(MainActivity.this, "Off" , Toast.LENGTH_SHORT).show();
} }
});
}
private void getCamera() {
// TODO Auto-generated method stub
if (camera == null) {
try {
camera = Camera.open();
params = camera.getParameters();
} catch (RuntimeException e) {
Log.e("Camera Error. Failed to Open. Error: ", e.getMessage());
}
} }
private void turnOnFlash() {
if (!isFlashOn) {
if (camera == null || params == null) {
return;
}
// play sound
playSound();
params = camera.getParameters();
params.setFlashMode(Parameters.FLASH_MODE_TORCH);
camera.setParameters(params);
camera.startPreview();
isFlashOn = true;
anime.setImageResource(R.drawable.anim);
anime.post(new Runnable() {
#Override
public void run() {
AnimationDrawable frameAnimation =
(AnimationDrawable) anime.getDrawable();
frameAnimation.start();
}
});
// changing button/switch image
} }
private void turnOffFlash() {
if (isFlashOn) {
if (camera == null || params == null) {
return;
}
// play sound
playSound();
params = camera.getParameters();
params.setFlashMode(Parameters.FLASH_MODE_OFF);
camera.setParameters(params);
camera.stopPreview();
isFlashOn = false;
anime.setImageResource(R.drawable.off);
// changing button/switch image
}
}
private void playSound() {
// TODO Auto-generated method stub
if(isFlashOn){
mp = MediaPlayer.create(MainActivity.this, R.raw.off1);
}else{
mp = MediaPlayer.create(MainActivity.this, R.raw.on1);
}
mp.setOnCompletionListener(new OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
// TODO Auto-generated method stub
mp.release();
}
});
mp.start();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
My Xml is
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:background="#drawable/bg"
tools:context="com.shakylight.MainActivity" >
<ToggleButton
android:id="#+id/ToggleButton01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:textOff=""
android:textOn=""
android:layout_marginTop="170dp"
android:background="#drawable/light"
android:checked="true" />
<ImageView
android:id="#+id/Animation"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:contentDescription="Animation"
android:background="#drawable/off"
android:layout_marginTop="148dp"
/>

It sounds like your app is failing to release the Camera correctly try adding:
camera.setPreviewCallback(null);
camera.release();
camera = null;
into your turnOffFlash

Extending my Android Radio Application

Recently, I uploaded simple Radio Application to the Google Play Store. And it has kinda a lot of downloaders. But it was really simple and I want to extend that Radio App to the next level. What it has for now is only ONE radio station to choose. No next, no previous buttons to choose from more Radio Stations. What I really want to do is to extend it so the user can listen for more Radio Stations(not one, but about 6 more or so). So maybe I need to add Previous and Next buttons to the app so the user can actually do that. But there is a problem - I don't know how to do this.
This is MainActivity.java class :
public class MainActivity extends Activity {
static String radioTitle = "RadioLink1";
static String radioStreamURL = "http://108.61.73.117:8124";
Button playButton;
Button pauseButton;
Button stopButton;
TextView statusTextView, bufferValueTextView;
NotificationCompat.Builder notifyBuilder;
private SeekBar volumeSeekbar;
private AudioManager audioManager = null;
private RadioUpdateReceiver radioUpdateReceiver;
private RadioService radioServiceBinder;
// Notification
private static final int NOTIFY_ME_ID = 12345;
private NotificationManager notifyMgr = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView titleTextView = (TextView) this
.findViewById(R.id.titleTextView);
titleTextView.setText(radioTitle);
playButton = (Button) this.findViewById(R.id.PlayButton);
pauseButton = (Button) this.findViewById(R.id.PauseButton);
stopButton = (Button) this.findViewById(R.id.StopButton);
playButton.setEnabled(true);
pauseButton.setEnabled(false);
stopButton.setEnabled(false);
pauseButton.setVisibility(View.INVISIBLE);
initControls();
statusTextView = (TextView) this
.findViewById(R.id.StatusDisplayTextView);
notifyMgr = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
showNotification();
setFont();
// Bind to the service
Intent bindIntent = new Intent(this, RadioService.class);
bindService(bindIntent, radioConnection, Context.BIND_AUTO_CREATE);
startService(new Intent(this, RadioService.class));
}
private void initControls() {
try {
audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
volumeSeekbar.setMax(audioManager
.getStreamMaxVolume(AudioManager.STREAM_MUSIC));
volumeSeekbar.setProgress(audioManager
.getStreamVolume(AudioManager.STREAM_MUSIC));
volumeSeekbar
.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
#Override
public void onStopTrackingTouch(SeekBar arg0) {
}
#Override
public void onStartTrackingTouch(SeekBar arg0) {
}
#Override
public void onProgressChanged(SeekBar arg0,
int progress, boolean arg2) {
audioManager.setStreamVolume(
AudioManager.STREAM_MUSIC, progress, 0);
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
public void setFont() {
// Font path
String fontPath = "fonts/Christmas Card.ttf";
// text view label
TextView txtGhost = (TextView) findViewById(R.id.titleTextView);
// Loading Font Face
Typeface tf = Typeface.createFromAsset(getAssets(), fontPath);
// Applying font
txtGhost.setTypeface(tf);
}
public void onClickPlayButton(View view) {
radioServiceBinder.play();
}
public void onClickPauseButton(View view) {
radioServiceBinder.pause();
}
public void onClickStopButton(View view) {
radioServiceBinder.stop();
}
#Override
protected void onPause() {
super.onPause();
if (radioUpdateReceiver != null)
unregisterReceiver(radioUpdateReceiver);
}
#Override
protected void onResume() {
super.onResume();
/* Register for receiving broadcast messages */
if (radioUpdateReceiver == null)
radioUpdateReceiver = new RadioUpdateReceiver();
registerReceiver(radioUpdateReceiver, new IntentFilter(
RadioService.MODE_CREATED));
registerReceiver(radioUpdateReceiver, new IntentFilter(
RadioService.MODE_DESTROYED));
registerReceiver(radioUpdateReceiver, new IntentFilter(
RadioService.MODE_STARTED));
registerReceiver(radioUpdateReceiver, new IntentFilter(
RadioService.MODE_PREPARED));
registerReceiver(radioUpdateReceiver, new IntentFilter(
RadioService.MODE_PLAYING));
registerReceiver(radioUpdateReceiver, new IntentFilter(
RadioService.MODE_PAUSED));
registerReceiver(radioUpdateReceiver, new IntentFilter(
RadioService.MODE_STOPPED));
registerReceiver(radioUpdateReceiver, new IntentFilter(
RadioService.MODE_COMPLETED));
registerReceiver(radioUpdateReceiver, new IntentFilter(
RadioService.MODE_ERROR));
registerReceiver(radioUpdateReceiver, new IntentFilter(
RadioService.MODE_BUFFERING_START));
registerReceiver(radioUpdateReceiver, new IntentFilter(
RadioService.MODE_BUFFERING_END));
}
/* Receive Broadcast Messages from RadioService */
private class RadioUpdateReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(RadioService.MODE_CREATED)) {
showNotification();
} else if (intent.getAction().equals(RadioService.MODE_DESTROYED)) {
clearNotification();
} else if (intent.getAction().equals(RadioService.MODE_STARTED)) {
playButton.setEnabled(false);
pauseButton.setEnabled(false);
stopButton.setEnabled(true);
playButton.setVisibility(View.VISIBLE);
pauseButton.setVisibility(View.INVISIBLE);
updateStatus("Buffering...");
} else if (intent.getAction().equals(RadioService.MODE_PREPARED)) {
playButton.setEnabled(true);
pauseButton.setEnabled(false);
stopButton.setEnabled(false);
playButton.setVisibility(View.VISIBLE);
pauseButton.setVisibility(View.INVISIBLE);
updateStatus("Rady");
} else if (intent.getAction().equals(
RadioService.MODE_BUFFERING_START)) {
updateStatus("Buffering...");
} else if (intent.getAction().equals(
RadioService.MODE_BUFFERING_END)) {
updateStatus("Playing");
} else if (intent.getAction().equals(RadioService.MODE_PLAYING)) {
playButton.setEnabled(false);
pauseButton.setEnabled(true);
stopButton.setEnabled(true);
playButton.setVisibility(View.INVISIBLE);
pauseButton.setVisibility(View.VISIBLE);
showNotification();
updateStatus("Playing");
} else if (intent.getAction().equals(RadioService.MODE_PAUSED)) {
playButton.setEnabled(true);
pauseButton.setEnabled(false);
stopButton.setEnabled(true);
playButton.setVisibility(View.VISIBLE);
pauseButton.setVisibility(View.INVISIBLE);
updateStatus("Paused");
} else if (intent.getAction().equals(RadioService.MODE_STOPPED)) {
playButton.setEnabled(true);
pauseButton.setEnabled(false);
stopButton.setEnabled(false);
playButton.setVisibility(View.VISIBLE);
pauseButton.setVisibility(View.INVISIBLE);
updateStatus("Stopped");
clearNotification();
} else if (intent.getAction().equals(RadioService.MODE_COMPLETED)) {
playButton.setEnabled(true);
pauseButton.setEnabled(false);
stopButton.setEnabled(false);
playButton.setVisibility(View.VISIBLE);
pauseButton.setVisibility(View.INVISIBLE);
updateStatus("Stopped");
} else if (intent.getAction().equals(RadioService.MODE_ERROR)) {
playButton.setEnabled(true);
pauseButton.setEnabled(false);
stopButton.setEnabled(false);
playButton.setVisibility(View.VISIBLE);
pauseButton.setVisibility(View.INVISIBLE);
updateStatus("Error");
}
}
}
public void updateStatus(String status) {
try {
if (notifyBuilder != null && notifyMgr != null) {
notifyBuilder.setContentText(status).setWhen(0);
notifyMgr.notify(NOTIFY_ME_ID, notifyBuilder.build());
}
statusTextView.setText(status);
} catch (Exception e) {
e.printStackTrace();
}
}
public void showNotification() {
notifyBuilder = new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.ic_launcher)
.setContentTitle(radioTitle).setContentText("");
Intent resultIntent = new Intent(this, MainActivity.class);
resultIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
resultIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
stackBuilder.addParentStack(MainActivity.class);
stackBuilder.addNextIntent(resultIntent);
PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0,
PendingIntent.FLAG_UPDATE_CURRENT);
notifyBuilder.setContentIntent(resultPendingIntent);
notifyMgr = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notifyMgr.notify(NOTIFY_ME_ID, notifyBuilder.build());
}
public void clearNotification() {
notifyMgr.cancel(NOTIFY_ME_ID);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main_menu, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.about:
Intent i = new Intent(this, AboutActivity.class);
startActivity(i);
return true;
}
return super.onOptionsItemSelected(item);
}
// Handles the connection between the service and activity
private ServiceConnection radioConnection = new ServiceConnection() {
public void onServiceConnected(ComponentName className, IBinder service) {
radioServiceBinder = ((RadioService.RadioBinder) service)
.getService();
}
public void onServiceDisconnected(ComponentName className) {
radioServiceBinder = null;
}
};
}
and RadioService.java class:
public class RadioService extends Service implements OnErrorListener, OnCompletionListener, OnPreparedListener, OnInfoListener {
private MediaPlayer mediaPlayer;
private String radioStreamURL = MainActivity.radioStreamURL;
public static final String MODE_CREATED = "CREATED";
public static final String MODE_DESTROYED = "DESTROYED";
public static final String MODE_PREPARED = "PREPARED";
public static final String MODE_STARTED = "STARTED";
public static final String MODE_PLAYING = "PLAYING";
public static final String MODE_PAUSED = "PAUSED";
public static final String MODE_STOPPED = "STOPPED";
public static final String MODE_COMPLETED = "COMPLETED";
public static final String MODE_ERROR = "ERROR";
public static final String MODE_BUFFERING_START = "BUFFERING_START";
public static final String MODE_BUFFERING_END = "BUFFERING_END";
private boolean isPrepared = false;
private final IBinder binder = new RadioBinder();
#Override
public void onCreate() {
/* Create MediaPlayer when it starts for first time */
mediaPlayer = new MediaPlayer();
mediaPlayer.setOnCompletionListener(this);
mediaPlayer.setOnErrorListener(this);
mediaPlayer.setOnPreparedListener(this);
mediaPlayer.setOnInfoListener(this);
sendBroadcast(new Intent(MODE_CREATED));
}
#Override
public void onDestroy() {
super.onDestroy();
mediaPlayer.stop();
mediaPlayer.reset();
isPrepared = false;
sendBroadcast(new Intent(MODE_DESTROYED));
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
sendBroadcast(new Intent(MODE_STARTED));
/* Starts playback at first time or resumes if it is restarted */
if(mediaPlayer.isPlaying())
sendBroadcast(new Intent(MODE_PLAYING));
else if(isPrepared) {
sendBroadcast(new Intent(MODE_PAUSED));
}
else
prepare();
return Service.START_STICKY;
}
#Override
public void onPrepared(MediaPlayer _mediaPlayer) {
/* If radio is prepared then start playback */
sendBroadcast(new Intent(MODE_PREPARED));
isPrepared = true;
play();
}
#Override
public void onCompletion(MediaPlayer mediaPlayer) {
/* When no stream found then complete the playback */
mediaPlayer.stop();
mediaPlayer.reset();
isPrepared = false;
sendBroadcast(new Intent(MODE_COMPLETED));
}
public void prepare() {
/* Prepare Async Task - starts buffering */
try {
mediaPlayer.setDataSource(radioStreamURL);
mediaPlayer.prepareAsync();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
public void play() {
if(isPrepared) {
mediaPlayer.start();
System.out.println("RadioService: play");
sendBroadcast(new Intent(MODE_PLAYING));
}
else
{
sendBroadcast(new Intent(MODE_STARTED));
prepare();
}
}
public void pause() {
mediaPlayer.pause();
System.out.println("RadioService: pause");
sendBroadcast(new Intent(MODE_PAUSED));
}
public void stop() {
mediaPlayer.stop();
mediaPlayer.reset();
isPrepared = false;
System.out.println("RadioService: stop");
sendBroadcast(new Intent(MODE_STOPPED));
}
#Override
public boolean onInfo(MediaPlayer mp, int what, int extra) {
/* Check when buffering is started or ended */
if(what == MediaPlayer.MEDIA_INFO_BUFFERING_START) {
sendBroadcast(new Intent(MODE_BUFFERING_START));
}
else if(what == MediaPlayer.MEDIA_INFO_BUFFERING_END) {
sendBroadcast(new Intent(MODE_BUFFERING_END));
}
return false;
}
#Override
public boolean onError(MediaPlayer mp, int what, int extra) {
sendBroadcast(new Intent(MODE_ERROR));
switch (what) {
case MediaPlayer.MEDIA_ERROR_NOT_VALID_FOR_PROGRESSIVE_PLAYBACK:
Log.v("ERROR","MEDIA ERROR NOT VALID FOR PROGRESSIVE PLAYBACK " + extra);
break;
case MediaPlayer.MEDIA_ERROR_SERVER_DIED:
Log.v("ERROR","MEDIA ERROR SERVER DIED " + extra);
break;
case MediaPlayer.MEDIA_ERROR_UNKNOWN:
Log.v("ERROR","MEDIA ERROR UNKNOWN " + extra);
break;
}
return false;
}
#Override
public IBinder onBind(Intent intent) {
return binder;
}
/* Allowing activity to access all methods of RadioService */
public class RadioBinder extends Binder {
RadioService getService() {
return RadioService.this;
}
}
}
And this layout:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#4a4a4a"
tools:context=".MainActivity" >
<LinearLayout
android:id="#+id/player_header_bg"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true" >
<TextView
android:id="#+id/titleTextView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="48dp"
android:background="#color/bgcolor"
android:gravity="center"
android:text="Classic Christmas Radio"
android:textAlignment="center"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#c0413b"
android:textSize="40sp" />
</LinearLayout>
<ImageView
android:id="#+id/imageView1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerInParent="true"
android:layout_marginBottom="120dp"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginTop="110dp"
android:src="#drawable/cover" />
<TextView
android:id="#+id/StatusDisplayTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#+id/PauseButton"
android:layout_alignLeft="#+id/imageView1"
android:layout_alignRight="#+id/imageView1"
android:gravity="center"
android:text="Unknown" />
<Button
android:id="#+id/PauseButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#id/StatusDisplayTextView"
android:layout_alignParentBottom="true"
android:layout_marginBottom="0.0dip"
android:background="#drawable/btn_pause"
android:onClick="onClickPauseButton" />
<Button
android:id="#+id/PlayButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#id/StatusDisplayTextView"
android:layout_alignParentBottom="true"
android:layout_marginBottom="0.0dip"
android:background="#drawable/btn_play"
android:onClick="onClickPlayButton" />
<Button
android:id="#+id/StopButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignRight="#id/StatusDisplayTextView"
android:layout_marginBottom="0.0dip"
android:background="#drawable/btn_stop"
android:onClick="onClickStopButton" />
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_toRightOf="#+id/PauseButton"
android:background="#drawable/btn_previous" />
<Button
android:id="#+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_toRightOf="#+id/button1"
android:background="#drawable/btn_next" />
</RelativeLayout>
I actually didn't write all the code and that's why I can't get my head straight to the problem solution. I just extended given code for my needs but now I don't really now how to implement Previous and Next buttons to navigate through different Radio Stations. What I want from you guys is to maybe give me some ideas or just set me on the road how can I add this functionality to this app. How can I get more than one stream (in this case from SHOUTcast) and add this navigation through them. I hope I didn't breaking the StackOverflow rules of asking this kind of question. Thank you and appreciate any help.
UPDATE:
In the MainActivity:
static String radioTitle = "RadioStation1";
static String radioStreamURL = "http://108.61.73.117:8124";
static String radioTitle2 = "RadioStation2";
static String radioStreamURL2 = "http://108.61.73.117:8124";
static String radioTitle3 = "RadioStation3";
static String radioStreamURL3 = "http://108.61.73.117:8124";
...........
nextButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
}
});
prevButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
}
});
And the RadioService class:
private String radioStreamURL = MainActivity.radioStreamURL;
private String radioStreamURL2 = MainActivity.radioStreamURL2;
private String radioStreamURL3 = MainActivity.radioStreamURL3;
...............
public void prepare() {
/* Prepare Async Task - starts buffering */
try {
mediaPlayer.setDataSource(radioStreamURL);
mediaPlayer.setDataSource(radioStreamURL2);
mediaPlayer.setDataSource(radioStreamURL3);
mediaPlayer.prepareAsync();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}

Look at your method at RadioService.java
public void prepare() {
/* Prepare Async Task - starts buffering */
try {
mediaPlayer.setDataSource(radioStreamURL);
mediaPlayer.prepareAsync();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
Here you set the URL to your radio stream, the fast way to change your code without knowing all your code is to alter radioStreamURL variable.
private String radioStreamURL = MainActivity.radioStreamURL;
If you have some static information about the radios you want to use, just change this String to a List and add all the Radio's URL you want.
Add a Next and Preview button to your layout, set the listener to call your RadioService with this function, something like this:
MainActivity
private static int station = 0;//Not right, just to show
public void onNextStationClicked(){
radioServiceBinder.changeStation(++station);
}
RadioService
public static final String MODE_STATION_CHANGE = "STATION_CHANGE";
public void changeStation(int stationIndex){
radioStreamURL = MainActivity.radioStreamURL.get(stationIndex);
stop();
play();
}
This is just an idea, the code isn't the best but with a little work should work...
UPDATE
Try change your code to this:
RadioService
private List<String> radioStreamURL = new ArrayList<String>
private int radioStreamingIndex = 0;
then on your constructor add this
#Override
public void onCreate() {
radioStreamURL.add(radioStreamURL);
radioStreamURL.add(radioStreamURL2);
radioStreamURL.add(radioStreamURL3);
// etc
}
public void prepare() {
/* Prepare Async Task - starts buffering */
try {
mediaPlayer.setDataSource(radioStreamURL.get(radioStreamingIndex));
mediaPlayer.prepareAsync();
} catch (Exception e) {
e.printStackTrace();
}
}
public void nextStation(){
changeStation(radioStreamingIndex+1);
}
public void prevStation(){
changeStation(radioStreamingIndex-1);
}
private void changeStation(int stationIndex){
if(stationIndex > 0 && stationIndex < radioStreamURL.size()){
radioStreamingIndex = stationIndex;
stop();
play();
}
}
MainActivity
nextButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
radioServiceBinder.nextStation();
}
});
prevButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
radioServiceBinder.prevStation();
}
});

I am not too experience in Android development, but you may need a complex algorithm developed if you would like to follow Spotify and Pandora's steps in the sense that the radio stations are created in relation to the listener's genre, etc.

Buttons not being shown when TextureView is implemented

So I implemented a TextureView through code. Now the buttons however are not being shown, and the onclick listener is giving me a null pointer exception. What am I doing wrong
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_camera);
mTextureView = new TextureView(this);
mTextureView.setSurfaceTextureListener(this);
setContentView(mTextureView);
if (!getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA)){
Toast.makeText(this, "No camera on device", Toast.LENGTH_LONG).show();
}else {
cameraId = findFrontFacingCamera();
if (cameraId<0){
Toast.makeText(this, "no front camera", Toast.LENGTH_LONG).show();
}else{
camera = Camera.open(cameraId);
Toast.makeText(this, "We have camera", Toast.LENGTH_LONG).show();
}
}
findViewById(R.id.buttonMenu).setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View v) {
// No account, load new account view
Intent intent = new Intent(CameraActivity.this,
MenuActivity.class);
startActivityForResult(intent, 0);
}
});
}
public void onSurfaceTextureAvailable(SurfaceTexture surface, int width,
int height) {
camera = Camera.open();
Camera.Size previewSize = camera.getParameters().getPreviewSize();
mTextureView.setLayoutParams(new FrameLayout.LayoutParams(
30, 30, Gravity.CENTER));
try {
camera.setPreviewTexture(surface);
} catch (IOException t) {
}
camera.startPreview();
mTextureView.setAlpha(0.8f);
mTextureView.setRotation(45.0f);
}
public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width,
int height) {
// Ignored, the Camera does all the work for us
}
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
camera.stopPreview();
camera.release();
return true;
}
public void onSurfaceTextureUpdated(SurfaceTexture surface) {
// Called whenever a new frame is available and displayed in the
rotation += 1.0f;
if (rotation > 360) {
rotation = 0;
}
mTextureView.setRotation(rotation);
}
#Override
protected void onPause() {
if (camera != null) {
camera.release();
camera = null;
}
super.onPause();
}
public void onClick(View view) {
if (camera == null){
Toast.makeText(this, "Camera is null", Toast.LENGTH_LONG).show();
}else{
camera.takePicture(null, null,
new PhotoHandler(getApplicationContext(), mPreferences ));
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.camera, menu);
return true;
}
}
xml file:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".CameraActivity" >
<Button
android:id="#+id/buttonMenu"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/capture"
android:layout_alignBottom="#+id/capture"
android:layout_alignParentLeft="true"
android:layout_marginLeft="22dp"
android:text="menu" />
<Button
android:id="#+id/capture"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="24dp"
android:onClick="onClick"
android:text="Take pic" />
</RelativeLayout>

you should add the TextureView you created through code in the activity_camera.xml. You should retrieve the root for activity_camera.xml (RelativeLayout) with findViewById and call addView(mTextureView) on the RelativeLayout instance you get. Calling setContentView(mTextureView) will simply replace the views hierarchy.