Develop Reference

WifiManager.startScan() returns false after three scans

I have to wait for about 30 seconds and startScan() works again. I tried making new Objects but it doesn't really work.
My code that is responsible for scanning Wifi.
wifiReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
results = wifiManager.getScanResults();
for (ScanResult scanResult : results){
arrayList.add("SSID: "+scanResult.SSID +"\nBSSID: " + scanResult.BSSID+ "\nLEVEL: "+scanResult.level);
arrayAdapter.notifyDataSetChanged();
}
scanWifi.setEnabled(true);
}
};
scanWifi.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v)
{
scanWifi.setEnabled(false);
arrayList.clear();
scanWifi(wifiManager);
}
});
boolean scanWifi(WifiManager wifiManagerToScan) {
String[] perm = {Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_WIFI_STATE, Manifest.permission.CHANGE_WIFI_STATE};
if (EasyPermissions.hasPermissions(this, perm)) {
registerReceiver(wifiReceiver, new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
boolean scanStarted = wifiManagerToScan.startScan();
if (scanStarted) {
Toast.makeText(this, "Scanning...", Toast.LENGTH_SHORT).show();
return true;
} else {
Toast.makeText(this, "ERROR", Toast.LENGTH_SHORT).show();
return false;
}
}
else {
EasyPermissions.requestPermissions(this, "WE REQUIRE THESE PERMISSIONS FOR THE APP TO FUNCTION", 123, perm);
return false;
}
}
}
Making new WifiManager object doesn't work.

Getting data in intent giving error in only one activity

I'm trying to pass an intent from adapter and get it in my activity.
Whenever I did this it went to the else condition.
It doesn't get the value and I don't no why. When I try the same code in any other activity it worked perfectly, but in this activity it always gives a null value in intent.
I know there are so many answers to how to get and pass intent, but in my case it doesn't work in one activity and I don't know why.
My Adapter class:
holder.getSurvey.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(context,AuthorMainScreen.class);
intent.putExtra("work", "getting");
context.startActivity(intent);
}
My AuthorMainScreen Activity:
public class AuthorMainScreen extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
Button newSurveyBtn, surveyWithRef, surveyResult;
ArrayList<JSONObject> jsonObjects = new ArrayList<JSONObject>();
public static TextView textView;
DatabaseReference databaseReference, surveyReference;
String referenceNo, loggedInUserId;
AlertDialog dialog;
ProgressDialog progressDialog;
DrawerLayout drawerLayout;
NavigationView navigationView;
LinearLayout linearLayout;
FirebaseAuth firebaseAuth;
TextView headerEmailView, rateOk;
Button headerLogout;
EditText reference;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_author_navigation);
progressDialog = new ProgressDialog(this);
progressDialog.setMessage("Processing your request...");
viewDeclaration();
clickFunctionalities();
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawerLayout, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawerLayout.setDrawerListener(toggle);
toggle.syncState();
//drawerLayout.addDrawerListener(actionBarDrawerToggle);
navigationView.setNavigationItemSelectedListener(this);
}
private void clickFunctionalities() {
newSurveyBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
surveyTitleDialog();
}
});
surveyWithRef.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
referenceDialog();
rateOk.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
referenceNo = reference.getText().toString().trim();
if (!referenceNo.isEmpty()) {
progressDialog.show();
getSurvey();
dialog.dismiss();
} else {
progressDialog.dismiss();
reference.setError("Reference # is required");
}
}
});
}
});
surveyResult.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
referenceDialog();
rateOk.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
referenceNo = reference.getText().toString().trim();
if (!referenceNo.isEmpty()) {
progressDialog.show();
getSurveyResultFile();
dialog.dismiss();
} else {
progressDialog.dismiss();
reference.setError("Reference # is required");
}
}
});
}
});
linearLayout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (drawerLayout.isDrawerOpen(GravityCompat.START)) {
drawerLayout.closeDrawer(GravityCompat.START);
} else {
drawerLayout.openDrawer(GravityCompat.START);
}
}
});
headerLogout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
FirebaseAuth.getInstance().signOut();
Intent intent = new Intent(AuthorMainScreen.this, LoginSignupActivity.class);
startActivity(intent);
finish();
}
});
}
private void surveyTitleDialog() {
final AlertDialog.Builder textBuilder = new AlertDialog.Builder(this);
LayoutInflater inflater = this.getLayoutInflater();
View view = inflater.inflate(R.layout.survey_name_dialog, null);
final EditText surveyName = view.findViewById(R.id.edt_set_survey_name);
TextView ok = view.findViewById(R.id.survey_name_btn);
ok.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
String surveyTitleName = surveyName.getText().toString().trim();
if (!surveyTitleName.equals("")) {
dialog.dismiss();
Intent intent = new Intent(AuthorMainScreen.this, MakeSurvey.class);
intent.putExtra("surveyname", surveyTitleName);
Toast.makeText(AuthorMainScreen.this, surveyTitleName, Toast.LENGTH_SHORT).show();
startActivity(intent);
} else {
surveyName.setError("Title is Required");
}
}
});
TextView cancelBtn = view.findViewById(R.id.dismiss_dialog);
cancelBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
dialog.dismiss();
}
});
textBuilder.setView(view);
dialog = textBuilder.create();
dialog.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
dialog.show();
Window window = dialog.getWindow();
window.setLayout(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
dialog.setCancelable(false);
}
private void getSurvey() {
surveyReference = FirebaseDatabase.getInstance().getReference().child(Constants.content).child(Constants.survey).child(referenceNo);
surveyReference.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
System.out.println(dataSnapshot);
if (dataSnapshot.hasChildren()) {
progressDialog.dismiss();
Intent intent = new Intent(getApplicationContext(), GetSurveys.class);
intent.putExtra(Constants.ref_no, referenceNo);
startActivity(intent);
} else {
progressDialog.dismiss();
Toast.makeText(getApplicationContext(), "Reference number is not valid !!!", Toast.LENGTH_LONG).show();
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
progressDialog.dismiss();
Toast.makeText(getApplicationContext(), "Something went wrong!!!", Toast.LENGTH_SHORT).show();
}
});
}
public void getSurveyResultFile() {
databaseReference = FirebaseDatabase.getInstance().getReference().child(Constants.content).child(Constants.Answers).child(loggedInUserId).child(referenceNo);
databaseReference.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
if (dataSnapshot.exists()) {
progressDialog.dismiss();
JSONArray dataSnapshotArray = new JSONArray();
JSONArray dataSnapshotChildrenArray;
JSONObject dataSnapshotChildrenAnswer;
JSONArray dataSnapshotChildrenAnswerValues;
for (DataSnapshot ds : dataSnapshot.getChildren()) {
System.out.println("sdsd" + ds);
dataSnapshotChildrenArray = new JSONArray();
ArrayList<Object> list = (ArrayList<Object>) ds.getValue();
for (int i = 0; i < list.size(); i++) {
HashMap<String, Object> map = (HashMap<String, Object>) list.get(i);
Iterator<Map.Entry<String, Object>> finalIterator = map.entrySet().iterator();
dataSnapshotChildrenAnswer = new JSONObject();
while (finalIterator.hasNext()) {
Map.Entry<String, Object> entry = finalIterator.next();
Object value = entry.getValue();
String key = entry.getKey();
try {
dataSnapshotChildrenAnswer.put(key, value);
if (value instanceof ArrayList) {
dataSnapshotChildrenAnswerValues = new JSONArray();
ArrayList<String> answers = (ArrayList<String>) value;
for (int j = 0; j < answers.size(); j++) {
dataSnapshotChildrenAnswerValues.put(answers.get(j));
}
dataSnapshotChildrenAnswer.put(key, dataSnapshotChildrenAnswerValues);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
dataSnapshotChildrenArray.put(dataSnapshotChildrenAnswer);
}
dataSnapshotArray.put(dataSnapshotChildrenArray);
System.out.println("jso " + dataSnapshotArray);
}
try {
saveCsv(dataSnapshotArray);
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Toast.makeText(AuthorMainScreen.this, "Sorry!!user or survey not found.", Toast.LENGTH_LONG).show();
progressDialog.dismiss();
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
}
public void saveCsv(JSONArray outerArray) throws IOException, JSONException {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (checkSelfPermission(android.Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
}
}
String fileName = referenceNo + " Result";
String rootPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/test/";
File dir = new File(rootPath);
if (!dir.exists()) {
dir.mkdir();
}
File file = null;
file = new File(rootPath, fileName);
if (!file.exists()) {
progressDialog.dismiss();
file.createNewFile();
}
if (file.exists()) {
progressDialog.dismiss();
CSVWriter writer = new CSVWriter(new FileWriter(file), ',');
for (int i = 0; i < outerArray.length(); i++) {
JSONArray innerJsonArray = (JSONArray) outerArray.getJSONArray(i);
for (int k = 0; k < innerJsonArray.length(); k++) {
String[][] arrayOfArrays = new String[innerJsonArray.length()][];
JSONObject innerJsonObject = (JSONObject) innerJsonArray.getJSONObject(k);
String[] stringArray1 = new String[innerJsonObject.length()];
//stringArray1[0]= (String) innerJsonObject.getString("type");
stringArray1[1] = "Questions";
stringArray1[2] = "Answers";
stringArray1[1] = (String) innerJsonObject.getString("title");
stringArray1[2] = "";
JSONArray jsonArray = (JSONArray) innerJsonObject.getJSONArray("answer");
for (int j = 0; j < jsonArray.length(); j++) {
stringArray1[2] += jsonArray.get(j).toString();
stringArray1[2] += ",";
}
arrayOfArrays[k] = stringArray1;
writer.writeNext(arrayOfArrays[k]);
System.out.println("aa " + Arrays.toString(arrayOfArrays[k]));
}
}
writer.close();
Toast.makeText(this, fileName + " is been saved at " + rootPath, Toast.LENGTH_LONG).show();
}
}
public void referenceDialog() {
final AlertDialog.Builder rateBuilder = new AlertDialog.Builder(this);
LayoutInflater inflater = this.getLayoutInflater();
View view = inflater.inflate(R.layout.survey_refno_dialog, null);
reference = view.findViewById(R.id.edt_survey_ref_no);
rateOk = view.findViewById(R.id.ref_btnOk);
TextView rateCancel = view.findViewById(R.id.ref_btnCancel);
rateBuilder.setView(view);
rateCancel.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
dialog.dismiss();
}
});
dialog = rateBuilder.create();
dialog.show();
Window rateWindow = dialog.getWindow();
rateWindow.setLayout(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
dialog.setCancelable(false);
}
private void viewDeclaration() {
newSurveyBtn = findViewById(R.id.new_surveys_button);
surveyWithRef = findViewById(R.id.get_survey_button);
surveyResult = findViewById(R.id.analyze_survey);
linearLayout = findViewById(R.id.hamburg_icon_layout);
drawerLayout = findViewById(R.id.drawer_layout);
navigationView = findViewById(R.id.navigation_view);
View view = navigationView.getHeaderView(0);
headerEmailView = view.findViewById(R.id.header_email);
headerLogout = findViewById(R.id.nav_logout);
firebaseAuth = FirebaseAuth.getInstance();
if (firebaseAuth.getCurrentUser() != null) {
String userEmail = firebaseAuth.getCurrentUser().getEmail();
headerEmailView.setText(userEmail);
}
if (firebaseAuth.getCurrentUser() != null && firebaseAuth.getCurrentUser().getUid() != null) {
loggedInUserId = firebaseAuth.getCurrentUser().getUid();
}
}
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem menuItem) {
switch (menuItem.getItemId()) {
case R.id.menu_share:
Intent intent = new Intent(Intent.ACTION_SEND);
intent.setType("text/plain");
intent.putExtra(Intent.EXTRA_SUBJECT, "DataPro");
intent.putExtra(Intent.EXTRA_TEXT, Constants.shareMessage);
startActivity(Intent.createChooser(intent, "Share Via"));
drawerLayout.closeDrawer(GravityCompat.START);
break;
case R.id.menu_survey_count:
startActivity(new Intent(getApplicationContext(), UserAllSurveys.class));
drawerLayout.closeDrawer(GravityCompat.START);
break;
case R.id.menu_new_instruments:
startActivity(new Intent(getApplicationContext(), CreateInstrument.class));
drawerLayout.closeDrawer(GravityCompat.START);
break;
case R.id.menu_about_us:
Toast.makeText(getApplicationContext(), "About us", Toast.LENGTH_SHORT).show();
drawerLayout.closeDrawer(GravityCompat.START);
break;
}
return true;
}
#Override
protected void onStart() {
super.onStart();
Intent intent = getIntent();
/* if (intent.hasExtra("work") ) {
String k = getIntent().getStringExtra("work");
Toast.makeText(this, k, Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "eroor", Toast.LENGTH_SHORT).show();
} */
Bundle bundle = getIntent().getExtras();
if (bundle != null ) {
String k = bundle.getString("work");
Toast.makeText(this, k, Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "error", Toast.LENGTH_SHORT).show();
}
}
#Override
public void onBackPressed() {
super.onBackPressed();
}

Try like this
Bundle bundle = getIntent().getExtras();
if (bundle != null ) {
String k = bundle.getString("work");
Toast.makeText(this, k, Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "error" , Toast.LENGTH_SHORT).show();
}

Do you have another class with the same class name, but different package name?
Because it seems like there is no extra parameter present in your receiver activity (AuthorMainScreen). Sometimes mistakes like this can take more time than any other logical mistake. Or you can try to call it onCreate() by commenting the rest of the code. Just check this.

Scanning for bluetooth devices programmatically don't find anything in android 6+

I created an application which pairs a cellphone to a bluetooth module.
i tested this application with a 4.2 android cellphone and it worked quite well but in cellphones with android higher than 6 the device is not fidning anything when i press " Scan for new devices " button.
but when i go through my phone bluetooth itself, i can find the module i was looking for..
Bluetooth connection class :
public class BluetoothConnectionActivity extends AppCompatActivity {
private ProgressDialog mProgressDlg;
private ArrayList<BluetoothDevice> mDeviceList = new ArrayList<BluetoothDevice>();
private BluetoothAdapter mBluetoothAdapter;
BluetoothDevice device ;
private MediaPlayer mediaplayer = null ;
private Button bluetoothOnOff;
private Button viewpairedDevices;
private Button scanfornewDevices;
private Button blue2;
ImageView unMute;
View view1;
View view2;
private Activity context;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.bluetoothconnectionlayout);
bluetoothOnOff = (Button) findViewById(R.id.bluetoothOnOff);
viewpairedDevices = (Button) findViewById(R.id.viewpairedDevicesButton);
scanfornewDevices = (Button) findViewById(R.id.scanfornewDevicesButton);
blue2 = (Button) findViewById(R.id.bluetoothOnOff2);
view1 = findViewById(R.id.viewFader);
view2 = findViewById(R.id.viewFader2);
unMute = (ImageView) findViewById(R.id.settingStartupSecondary);
mediaplayer = MediaPlayer.create(getApplicationContext(),R.raw.sfxturnon);
Handler startup1 = new Handler();
startup1.postDelayed(new Runnable() {
#Override
public void run() {
view1.animate().alpha(1f).setDuration(500);
view2.animate().alpha(1f).setDuration(500);
}
},1000);
Handler startup2 = new Handler();
startup2.postDelayed(new Runnable() {
#Override
public void run() {
bluetoothOnOff.animate().alpha(1f).setDuration(500);
viewpairedDevices.animate().alpha(1f).setDuration(500);
scanfornewDevices.animate().alpha(1f).setDuration(500);
unMute.animate().alpha(1f).setDuration(100);
}
},1000);
//
// settingBtn.setOnClickListener(new View.OnClickListener() {
// #Override
// public void onClick(View view) {
//
//
// AudioManager amanager=(AudioManager)getSystemService(Context.AUDIO_SERVICE);
// amanager.setStreamMute(AudioManager.STREAM_NOTIFICATION, true);
//
//// settingBtn.setEnabled(false);
//// settingBtn.animate().alpha(0f);
//
// unMute.animate().alpha(1f);
// unMute.setEnabled(true);
//
//
// Toast.makeText(getApplicationContext(), " Application muted. ", Toast.LENGTH_SHORT).show();
//
//
// }
// });
Handler dawg = new Handler();
dawg.postDelayed(new Runnable() {
#Override
public void run() {
bluetoothOnOff.animate().alpha(1f).setDuration(1500);
viewpairedDevices.animate().alpha(1f).setDuration(2500);
scanfornewDevices.animate().alpha(1f).setDuration(3000);
}
},500);
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
mProgressDlg = new ProgressDialog(this);
mProgressDlg.setMessage("Scanning, Please wait...");
mProgressDlg.setCancelable(false);
mProgressDlg.setButton(DialogInterface.BUTTON_NEGATIVE, "Cancel", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
mBluetoothAdapter.cancelDiscovery();
}
});}
if (mBluetoothAdapter.isEnabled()){
bluetoothOnOff.setText("Bluetooth is On");
blue2.setText("Bluetooth is On");
}else {
blue2.setText("Bluetooth is Off");
bluetoothOnOff.setText("Bluetooth is Off");
}
if (mBluetoothAdapter == null) {
showUnsupported();
} else {
viewpairedDevices.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();
if (pairedDevices == null || pairedDevices.size() == 0) {
Toast toast = Toast.makeText(getApplicationContext()," No paired device found.", Toast.LENGTH_SHORT);
View view3 = toast.getView();
view3.setBackgroundColor(Color.parseColor("#ffff5b"));
TextView text = (TextView) view3.findViewById(android.R.id.message);
text.setTextColor(Color.parseColor("#000000"));
toast.show();
} else {
ArrayList<BluetoothDevice> list = new ArrayList<BluetoothDevice>();
list.addAll(pairedDevices);
Intent intent = new Intent(BluetoothConnectionActivity.this, DeviceList.class);
intent.putParcelableArrayListExtra("device.list", list);
startActivity(intent);
}
}
});
scanfornewDevices.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
mBluetoothAdapter.startDiscovery();
}
});
bluetoothOnOff.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (mBluetoothAdapter.isEnabled()) {
mBluetoothAdapter.disable();
showDisabled();
bluetoothOnOff.setText("Bluetooth is OFF");
final Handler handler6 = new Handler();
handler6.postDelayed(new Runnable() {
#Override
public void run() {
mediaplayer.start();
}
}, 500);
final Handler handler3 = new Handler();
handler3.postDelayed(new Runnable() {
#Override
public void run() {
bluetoothOnOff.animate().translationY(-1f).setDuration(5000);
blue2.animate().translationY(-1f).setDuration(5000);
bluetoothOnOff.animate().alpha(1f).setDuration(3000);
blue2.animate().alpha(0f).setDuration(3000);
}
}, 500);
} else {
Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(intent, 1000);
}}
});
blue2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (mBluetoothAdapter.isEnabled()) {
mBluetoothAdapter.disable();
showDisabled();
bluetoothOnOff.setText("Bluetooth is OFF");
final Handler handler6 = new Handler();
handler6.postDelayed(new Runnable() {
#Override
public void run() {
mediaplayer.start();
}
}, 500);
final Handler handler3 = new Handler();
handler3.postDelayed(new Runnable() {
#Override
public void run() {
bluetoothOnOff.animate().translationY(-1f).setDuration(5000);
blue2.animate().translationY(-1f).setDuration(5000);
bluetoothOnOff.animate().alpha(1f).setDuration(3000);
blue2.animate().alpha(0f).setDuration(3000);
}
}, 500);
} else {
Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(intent, 1000);
}}
});
if (mBluetoothAdapter.isEnabled()) {
showEnabled();
} else {
showDisabled();
}
}
IntentFilter filter = new IntentFilter();
filter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
filter.addAction(BluetoothDevice.ACTION_FOUND);
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
registerReceiver(mReceiver, filter);
}
#Override
public void onPause() {
if (mBluetoothAdapter != null) {
if (mBluetoothAdapter.isDiscovering()) {
mBluetoothAdapter.cancelDiscovery();
}
}
super.onPause();
}
#Override
public void onBackPressed() {
}
#Override
public void onDestroy() {
unregisterReceiver(mReceiver);
super.onDestroy();
}
private void showEnabled() {
bluetoothOnOff.setEnabled(true);
viewpairedDevices.setEnabled(true);
viewpairedDevices.setBackgroundResource(R.drawable.selectorstylish);
scanfornewDevices.setEnabled(true);
scanfornewDevices.setBackgroundResource(R.drawable.selectorstylish);
}
private void showDisabled() {
bluetoothOnOff.setEnabled(true);
viewpairedDevices.setEnabled(false);
viewpairedDevices.setBackgroundResource(R.drawable.selectorstylish);
scanfornewDevices.setEnabled(false);
scanfornewDevices.setBackgroundResource(R.drawable.selectorstylish);
}
private void showUnsupported() {
Toast toast = Toast.makeText(getApplicationContext()," Bluetooth is not supported by this device.", Toast.LENGTH_SHORT);
View view3 = toast.getView();
view3.setBackgroundColor(Color.parseColor("#ffff5b"));
TextView text = (TextView) view3.findViewById(android.R.id.message);
text.setTextColor(Color.parseColor("#000000"));
toast.show();
bluetoothOnOff.setEnabled(false);
viewpairedDevices.setEnabled(false);
viewpairedDevices.setBackgroundResource(R.drawable.selectorstylish);
scanfornewDevices.setEnabled(false);
scanfornewDevices.setBackgroundResource(R.drawable.selectorstylish);
}
private void showToast(String message) {
Toast.makeText(getApplicationContext(), message, Toast.LENGTH_SHORT).show();
}
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (BluetoothAdapter.ACTION_STATE_CHANGED.equals(action)) {
final int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.ERROR);
if (state == BluetoothAdapter.STATE_ON) {
bluetoothOnOff.setText("Bluetooth is On");
blue2.setText("Bluetooth is On");
showEnabled();
final Handler handler5 = new Handler();
handler5.postDelayed(new Runnable() {
#Override
public void run() {
mediaplayer.start();
}
}, 500);
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
#Override
public void run() {
bluetoothOnOff.animate().translationY(150f).setDuration(5000);
blue2.animate().translationY(150f).setDuration(5000);
bluetoothOnOff.animate().alpha(0f).setDuration(3000);
blue2.animate().alpha(1f).setDuration(3000);
}
}, 500);
}
} else if (BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action)) {
mDeviceList = new ArrayList<BluetoothDevice>();
mProgressDlg.show();
} else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
mProgressDlg.dismiss();
// Intent newIntent = new Intent(BluetoothConnectionActivity.this, DeviceList.class);
//
// newIntent.putParcelableArrayListExtra("device.list", mDeviceList);
//
// startActivity(newIntent);
} else if (BluetoothDevice.ACTION_FOUND.equals(action)) {
BluetoothDevice device = (BluetoothDevice) intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
mDeviceList.add(device);
Toast toast = Toast.makeText(getApplicationContext()," Found device" + device.getName(), Toast.LENGTH_SHORT);
View view3 = toast.getView();
view3.setBackgroundColor(Color.parseColor("#ffff5b"));
TextView text = (TextView) view3.findViewById(android.R.id.message);
text.setTextColor(Color.parseColor("#000000"));
toast.show();
}
}
};
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.optionmenu,menu);
return super.onCreateOptionsMenu(menu);
}
}
Device list Class :
public class DeviceList extends AppCompatActivity {
private ListView mListView;
private AdapterClassBluetooth mAdapterClassBluetooth;
private ArrayList<BluetoothDevice> mDeviceList;
private BluetoothDevice device ;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_device_list);
mDeviceList = getIntent().getExtras().getParcelableArrayList("device.list");
mListView = (ListView) findViewById(R.id.lv_paired);
mAdapterClassBluetooth = new AdapterClassBluetooth(this);
mAdapterClassBluetooth.setData(mDeviceList);
mAdapterClassBluetooth.setListener(new AdapterClassBluetooth.OnPairButtonClickListener() {
#Override
public void onPairButtonClick(int position) {
BluetoothDevice device = mDeviceList.get(position);
if (device.getBondState() == BluetoothDevice.BOND_BONDED) {
unpairDevice(device);
} else {
Toast toast = Toast.makeText(getApplicationContext(), "Pairing..." , Toast.LENGTH_SHORT);
View view = toast.getView();
view.setBackgroundColor(Color.parseColor("#ffff5b"));
TextView text = (TextView) view.findViewById(android.R.id.message);
text.setTextColor(Color.parseColor("#000000"));
toast.show();
pairDevice(device);
}
}
});
mListView.setAdapter(mAdapterClassBluetooth);
registerReceiver(mPairReceiver, new IntentFilter(BluetoothDevice.ACTION_BOND_STATE_CHANGED));
}
#Override
public void onDestroy() {
unregisterReceiver(mPairReceiver);
super.onDestroy();
}
private void showToast(String message) {
Toast.makeText(getApplicationContext(), message, Toast.LENGTH_SHORT).show();
}
private void pairDevice(BluetoothDevice device) {
try {
Method method = device.getClass().getMethod("createBond", (Class[]) null);
method.invoke(device, (Object[]) null);
} catch (Exception e) {
e.printStackTrace();
}
}
private void unpairDevice(BluetoothDevice device) {
try {
Method method = device.getClass().getMethod("removeBond", (Class[]) null);
method.invoke(device, (Object[]) null);
} catch (Exception e) {
e.printStackTrace();
}
}
private final BroadcastReceiver mPairReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (BluetoothDevice.ACTION_BOND_STATE_CHANGED.equals(action)) {
final int state = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE, BluetoothDevice.ERROR);
final int prevState = intent.getIntExtra(BluetoothDevice.EXTRA_PREVIOUS_BOND_STATE, BluetoothDevice.ERROR);
if (state == BluetoothDevice.BOND_BONDED && prevState == BluetoothDevice.BOND_BONDING) {
Toast toast = Toast.makeText(getApplicationContext()," Device are paired, please wait...", Toast.LENGTH_SHORT);
View view = toast.getView();
view.setBackgroundColor(Color.parseColor("#ffff5b"));
TextView text = (TextView) view.findViewById(android.R.id.message);
text.setTextColor(Color.parseColor("#000000"));
toast.show();
Handler delaying = new Handler();
delaying.postDelayed(new Runnable() {
#Override
public void run() {
Intent communicate = new Intent(DeviceList.this,Security.class);
startActivity(communicate);
finish();
}
},1500);
} else if (state == BluetoothDevice.BOND_NONE && prevState == BluetoothDevice.BOND_BONDED){
Toast toast = Toast.makeText(getApplicationContext(),"Unpaired.", Toast.LENGTH_SHORT);
View view = toast.getView();
view.setBackgroundColor(Color.parseColor("#ffff5b"));
TextView text = (TextView) view.findViewById(android.R.id.message);
text.setTextColor(Color.parseColor("#000000"));
toast.show();
}
mAdapterClassBluetooth.notifyDataSetChanged();
}
}
};}
Adapter class :
public class AdapterClassBluetooth extends BaseAdapter{
private LayoutInflater mInflater;
private List<BluetoothDevice> mData;
private OnPairButtonClickListener mListener;
public AdapterClassBluetooth(){
}
public AdapterClassBluetooth(Context context) {
super();
mInflater = LayoutInflater.from(context);
}
public void setData(List<BluetoothDevice> data) {
mData = data;
}
public void setListener(OnPairButtonClickListener listener) {
mListener = listener;
}
public int getCount() {
return (mData == null) ? 0 : mData.size();
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return position;
}
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.adapterlist, null);
holder = new ViewHolder();
holder.nameTv = (TextView) convertView.findViewById(R.id.tv_name);
holder.addressTv = (TextView) convertView.findViewById(R.id.tv_address);
holder.pairBtn = (Button) convertView.findViewById(R.id.btn_pair);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
BluetoothDevice device = mData.get(position);
holder.nameTv.setText(device.getName());
holder.addressTv.setText(device.getAddress());
holder.pairBtn.setText((device.getBondState() == BluetoothDevice.BOND_BONDED) ? "Unpair" : "Pair");
holder.pairBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (mListener != null) {
mListener.onPairButtonClick(position);
}
}
});
return convertView;
}
static class ViewHolder {
TextView nameTv;
TextView addressTv;
TextView pairBtn;
}
public interface OnPairButtonClickListener {
public abstract void onPairButtonClick(int position);
}
}
in an article i studied about this issue and find out that with this code :
if (ContextCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(context,
new String[]{Manifest.permission.ACCESS_COARSE_LOCATION},
1);
i can make the application to support phones with android more than 6 so i can discover all nearby devices and pair with them,
The issue is, i don't know where should i exactly use this code..
i would really appreciate if you could tell me where to use it within the codes i showed here.
or simply tell me how to overcome this problem with any other code you may know.

In your AndroidManifest.xml file add this:
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
Then, instead of calling registerReceiver call this function:
private tryRegisterReceiver() {
if (ContextCompat.checkSelfPermission(thisActivity,
Manifest.permission.ACCESS_COARSE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
// Here, permission is not granted
// after calling requestPermissions, the result must be treated in onRequestPermissionResult
ActivityCompat.requestPermissions(thisActivity,
new String[]{Manifest.permission.ACCESS_COARSE_LOCATION},
1000); // 100 or other desired code
} else {
// Permission has already been granted
// continue registering your receiver
registerReceiver();
}
}
To treat the result of the permission request
#Override
public void onRequestPermissionsResult(int requestCode,
String[] permissions, int[] grantResults) {
switch (requestCode) {
case 1000: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted
// continue registering your receiver
registerReceiver();
} else {
// permission denied
// show a message or finish your activity
}
return;
}
// other 'case' for other permissions if needed
}
}

Android studio app crashes while attempting to send file over bluetooth

Android bluetooth app crashes while trying to send data via bluetooth. I was able to turn on, make discoverable, and show paired devices. But, it crashes when i attempt the send file button. Im getting these errors in my Debugger.
Process: com.example.bluetooth_demoproject, PID: 31320
java.lang.NullPointerException: Attempt to get length of null
array
at com.example.bluetooth_demoproject.MainActivity.ListDir(MainActivity.java:253)
at com.example.bluetooth_demoproject.MainActivity.onPrepareDialog(MainActivity.java:228)
at android.app.Activity.onPrepareDialog(Activity.java:4000)
at android.app.Activity.showDialog(Activity.java:4063)
at android.app.Activity.showDialog(Activity.java:4014)
at
com.example.bluetooth_demoproject.MainActivity$1.onClick(MainActivity.java:75)
at android.view.View.performClick(View.java:6896)
at
android.widget.TextView.performClick(TextView.java:12689)
at android.view.View$PerformClick.run(View.java:26088)
at android.os.Handler.handleCallback(Handler.java:789)
at android.os.Handler.dispatchMessage(Handler.java:98)
at android.os.Looper.loop(Looper.java:164)
at
android.app.ActivityThread.main(ActivityThread.java:6940)
at java.lang.reflect.Method.invoke(Native Method)
at
com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)
Also here is my MainActivity. If theres a better way to sending files via
bluetooth please point it out or help with my code.
public class MainActivity extends Activity {
// Creating objects -----------------------------
private static final int REQUEST_ENABLE_BT = 0;
private static final int REQUEST_DISCOVER_BT_ = 1;
private static int CUSTOM_DIALOG_ID;
ListView dialog_ListView;
TextView mBluetoothStatus, mPairedDevicesList, mTextFolder;
ImageView mBluetoothIcon;
Button mOnButton, mOffButton, mDiscoverableButton, mPairedDevices,
mbuttonOpenDialog, msendBluetooth, mbuttonUp;
File root, fileroot, curFolder;
EditText dataPath;
private static final int DISCOVER_DURATION = 300;
private List<String> fileList = new ArrayList<String>();
// -------------------------------------------------------
BluetoothAdapter mBlueAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
dataPath =(EditText) findViewById(R.id.FilePath);
mTextFolder = findViewById(R.id.folder);
mBluetoothStatus = findViewById(R.id.BluetoothStatus);
mBluetoothIcon = findViewById(R.id.bluetoothIcon);
mOnButton = findViewById(R.id.onButton);
mOffButton = findViewById(R.id.offButton);
mDiscoverableButton = findViewById(R.id.discoverableButton);
mPairedDevices = findViewById(R.id.pairedDevices);
mPairedDevicesList = findViewById(R.id.pairedDeviceList);
mbuttonOpenDialog = findViewById(R.id.opendailog);
msendBluetooth = findViewById(R.id.sendBluetooth);
mbuttonUp = findViewById(R.id.up);
mbuttonOpenDialog.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
dataPath.setText("");
showDialog(CUSTOM_DIALOG_ID);
}
});
root = new
File(Environment.getExternalStorageDirectory().getAbsolutePath());
curFolder = root;
msendBluetooth.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v) {
sendViaBluetooth();
}
});
//adapter
mBlueAdapter = BluetoothAdapter.getDefaultAdapter();
if(mBlueAdapter == null){
mBluetoothStatus.setText("Bluetooth is not available");
return;
}
else {
mBluetoothStatus.setText("Bluetooth is available");
}
//if Bluetooth isnt enabled, enable it
if (!mBlueAdapter.isEnabled()) {
Intent enableBtIntent = new
Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
}
//set image according to bluetooth Status
if (mBlueAdapter.isEnabled()) {
mBluetoothIcon.setImageResource(R.drawable.action_on);
}
else {
mBluetoothIcon.setImageResource(R.drawable.action_off);
}
//on button Click
mOnButton.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v) {
if (!mBlueAdapter.isEnabled()) {
showToast("Turning Bluetooth on...");
// intent to on bluetooth
Intent intent = new
Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(intent, REQUEST_ENABLE_BT);
}
else {
showToast("Bluetooth is already on");
}
}
});
//discover Bluetooth button
mDiscoverableButton.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v){
if (!mBlueAdapter.isDiscovering()) {
showToast("Making device discoverable");
Intent intent = new
Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
startActivityForResult(intent, REQUEST_DISCOVER_BT_);
}
}
});
// off button click
mOffButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (mBlueAdapter.isEnabled()) {
showToast("Turning Bluetooth off...");
// intent to turn off bluetooth
mBluetoothIcon.setImageResource(R.drawable.action_off);
}
else{
showToast("Bluetooth is already off");
}
}
});
//get paired device button click
mPairedDevices.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (mBlueAdapter.isEnabled()) {
mPairedDevices.setText("Paired Devices");
Set<BluetoothDevice> devices =
mBlueAdapter.getBondedDevices();
for (BluetoothDevice device : devices){
mPairedDevices.append("\nDevice: " + device.getName() +
"," + device );
}
}
else {
//bluetooth is off and cant get paired devices
showToast("Turn on bluetooth to get paired devices");
}
}
});
}
#Override
protected Dialog onCreateDialog(int id) {
Dialog dialog = null;
if (id == CUSTOM_DIALOG_ID) {
dialog = new Dialog(MainActivity.this);
dialog.setContentView(R.layout.dailoglayout);
dialog.setTitle("File Selector");
dialog.setCancelable(true);
dialog.setCanceledOnTouchOutside(true);
mTextFolder = (TextView) dialog.findViewById(R.id.folder);
mbuttonUp = (Button) dialog.findViewById(R.id.up);
mbuttonUp.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
ListDir(curFolder.getParentFile());
}
});
dialog_ListView = (ListView) dialog.findViewById(R.id.dialoglist);
dialog_ListView.setOnItemClickListener(new
AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int
position, long id) {
File selected = new File(fileList.get(position));
if (selected.isDirectory()) {
ListDir(selected);
} else if (selected.isFile()) {
getSelectedFile(selected);
} else {
dismissDialog(CUSTOM_DIALOG_ID);
}
}
});
}
return dialog;
}
#Override
protected void onPrepareDialog(int id, Dialog dialog) {
super.onPrepareDialog(id, dialog);
if (id == CUSTOM_DIALOG_ID) {
ListDir(curFolder);
}
}
public void getSelectedFile(File f) {
dataPath.setText(f.getAbsolutePath());
fileList.clear();
dismissDialog(CUSTOM_DIALOG_ID);
}
public void ListDir(File f) {
if (f.equals(root)) {
mbuttonUp.setEnabled(false);
}
else {
mbuttonUp.setEnabled(true);
}
curFolder = f;
mTextFolder.setText(f.getAbsolutePath());
dataPath.setText(f.getAbsolutePath());
File[] files = f.listFiles();
fileList.clear();
for (File file : files) {
fileList.add(file.getPath());
}
ArrayAdapter<String> directoryList = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, fileList);
dialog_ListView.setAdapter(directoryList);
}
// exits to app --------------------------------
public void exit(View V) {
mBlueAdapter.disable();
Toast.makeText(this, "*** Now bluetooth is off...",
Toast.LENGTH_LONG).show();
finish();
}
// send file via bluetooth ------------------------
public void sendViaBluetooth() {
if(!dataPath.equals(null)) {
if(mBlueAdapter == null) {
Toast.makeText(this, "Device doesnt support bluetooth",
Toast.LENGTH_LONG).show();
}
else {
enableBluetooth();
}
}
else {
Toast.makeText(this, "please select a file",
Toast.LENGTH_LONG).show();
}
}
public void enableBluetooth() {
showToast("Making device discoverable");
Intent intent = new
Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
startActivityForResult(intent, REQUEST_DISCOVER_BT_);
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent
data) {
if (resultCode == DISCOVER_DURATION && requestCode ==
REQUEST_DISCOVER_BT_) {
Intent i = new Intent();
i.setAction(Intent.ACTION_SEND);
i.setType("*/*");
File file = new File(dataPath.getText().toString());
i.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(file));
PackageManager pm = getPackageManager();
List<ResolveInfo> list = pm.queryIntentActivities(i, 0);
if (list.size() > 0) {
String packageName = null;
String className = null;
boolean found = false;
for (ResolveInfo info : list) {
packageName = info.activityInfo.packageName;
if (packageName.equals("com.android.bluetooth")) {
className = info.activityInfo.name;
found = true;
}
}
//CHECK BLUETOOTH available or not------------------------------
------------------
if (!found) {
Toast.makeText(this, "Bluetooth not been found",
Toast.LENGTH_LONG).show();
} else {
i.setClassName(packageName, className);
startActivity(i);
}
}
} else {
Toast.makeText(this, "Bluetooth is cancelled",
Toast.LENGTH_LONG).show();
}
}
#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();
//noinspection SimplifiableIfStatement
return super.onOptionsItemSelected(item);
}
//toast message function
private void showToast(String msg) {
Toast.makeText(this, msg, Toast.LENGTH_SHORT) .show();
}
}

Google Cloud Speech API for Android

Currently I`m working on a project where i have to use Google Cloud Speech Api and TextToSpeech. I try-ed to work around with RecognizerIntent but i would like to give a try to Cloud Speech .
Would be great some tutorial material or guide , i checked the sample app
but i`m looking for tutorial , guide anything that could explain something.
Here is my work around with TTS and RecognizerIntent .
private TextToSpeech tts;
private TextToSpeech secondTTS;
private TextView speechInputTextView,correctAnswerTextView,wrongAnswerTextView,currentQuestionTextView;
private ArrayList<String> correctAnswersArrayList, questionArrayList, sayCorrectArrayList, sayWrongArrayList ,toSay ,toASk;
private MediaPlayer mediaPlayer;
private DBHelper dbHelper;
private SQLiteDatabase sqlDB;
private int correctACount,wrongACount,currentQuestion, Unit;
private boolean isStarted;
private String currentLanguage ;
private static int TOTAL_QUESITONS;
private final static int REQ_CODE_SPEECH_INPUT = 100;
private final static String PAUSE_COMMAND = "pos";
private final static String STOP_COMMAND = "stop";
private final static String RESTART_COMMNAD = "restart";
private final static String REPEAT_COMMAND = "repeat";
private final static String EXIT_COMMAND = "exit";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_unit);
isStarted = true;
mediaPlayer = MediaPlayer.create(getApplicationContext(), R.raw.unitonemp3);
currentQuestion = 0;
speechInputTextView = (TextView) findViewById(R.id.speechInput);
correctAnswerTextView = (TextView) findViewById(R.id.correctAnswers_TextView);
currentQuestionTextView = (TextView) findViewById(R.id.currentQuestion_TextView);
wrongAnswerTextView = (TextView) findViewById(R.id.wrongAnswer_TextView);
Unit = 1;
currentLanguage = getIntent().getBundleExtra("resultBundle").getString("language");
Button next = (Button) findViewById(R.id.nextButton);
Button changeUnitButton = (Button) findViewById(R.id.changeUnitButton);
Button playButton = (Button) findViewById(R.id.playButton);
Button pauseButton = (Button) findViewById(R.id.pauseButton);
playButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startSayWithID(questionArrayList.get(currentQuestion), 1000, "say");
}
});
pauseButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
tts.stop();
secondTTS.stop();
Intent pauseI = new Intent(UnitActivity.this, PauseActivity.class);
Bundle resultBundle = new Bundle();
resultBundle.putInt("npc", currentQuestion);
pauseI.putExtra("resultBundle", resultBundle);
startActivity(pauseI);
}
});
tts = new TextToSpeech(this, this);
secondTTS = new TextToSpeech(this, this);
changeUnitButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
secondTTS.stop();
tts.stop();
Unit ++;
mediaPlayer.start();
}
});
Bundle extras = getIntent().getExtras();
if (extras != null) {
currentQuestion = getIntent().getBundleExtra("resultBundle").getInt("npc");
}
ImageView micButton = (ImageView) findViewById(R.id.micButton);
micButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (!tts.isSpeaking()) {
currentQuestion = 13;
startSayWithID(questionArrayList.get(currentQuestion), 1000, "questionID");
}
}
});
String[] sayCorrectList = getResources().getStringArray(R.array.sayCorrect);
String[] sayWrongList = getResources().getStringArray(R.array.satWrong);
String[] listToSay = getResources().getStringArray(R.array.toSay);
String[] listToAsk = getResources().getStringArray(R.array.toAsk);
toSay = new ArrayList<>(Arrays.asList(listToSay));
toASk = new ArrayList<>(Arrays.asList(listToAsk));
questionArrayList = new ArrayList<>();
correctAnswersArrayList = new ArrayList<>();
addGerCorrect();
addEngQuestions();
sayCorrectArrayList = new ArrayList<>(Arrays.asList(sayCorrectList));
sayWrongArrayList = new ArrayList<>(Arrays.asList(sayWrongList));
TOTAL_QUESITONS = questionArrayList.size();
mediaPlayer.start();
mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
startSayWithID("Welcome",1000,"instruction");
}
});
next.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
for(int i = 0 ; i< questionArrayList.size();i++){
Log.d(" question List "," item :"+"pisition "+i+ "" +questionArrayList.get(i));
}
currentQuestion++;
tts.stop();
secondTTS.stop();
startSayWithID("",1000,"instruction");
}
});
tts.setOnUtteranceProgressListener(new UtteranceProgressListener() {
#Override
public void onStart(String utteranceId) {
}
#Override
public void onDone(final String utteranceId) {
runOnUiThread(new Runnable() {
#Override
public void run() {
if (utteranceId.contains("say")) {
if (correctAnswersArrayList.get(currentQuestion).contains("tensa23")) {
startSayWithID(questionArrayList.get(currentQuestion), 1000, "say");
currentQuestion++;
Log.d("Current ", "current Question" + currentQuestion + "" + correctAnswersArrayList.get(currentQuestion));
}else
startSayWithID(questionArrayList.get(currentQuestion), 1000, "question");
}
if (utteranceId.contains("instruction")) {
if (correctAnswersArrayList.get(currentQuestion).contains("tensa23")) {
startSayWithID(questionArrayList.get(currentQuestion), 1000, "say");
currentQuestion++;
Log.d("Current ","current Question"+currentQuestion +""+correctAnswersArrayList.get(currentQuestion));
} else if (questionArrayList.get(currentQuestion).contains("?")) {
startSayWithID(toASk.get(new Random().nextInt(toASk.size())), 1000, "say");
} else {
startSayWithID(toSay.get(new Random().nextInt(toSay.size())), 1000, "say");
}
}
if (utteranceId.contains("question")) {
if(questionArrayList.get(currentQuestion).contains("?")){
startSayWithID("in Spanish you ask",1000,"german");
}else{
startSayWithID("In Spanish you say",1000,"german");
}
}
if (utteranceId.contains("german")) {
secondTTS.speak(correctAnswersArrayList.get(currentQuestion),TextToSpeech.QUEUE_FLUSH,null,"ask");
}
if(utteranceId.contains("ask")){
startAsk(1000);
}
}
});
}
#Override
public void onError(String utteranceId) {
}
});
secondTTS.setOnUtteranceProgressListener(new UtteranceProgressListener() {
#Override
public void onStart(String utteranceId) {
}
#Override
public void onDone(final String utteranceId) {
runOnUiThread(new Runnable() {
#Override
public void run() {
if(utteranceId.contains("ask")){
startAsk(1000);
}
}
});
}
#Override
public void onError(String utteranceId) {
}
});
// end of MainActivity
}
private void promptSpeechInput() {
Intent prompIntent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
prompIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, "es-ES");
prompIntent.putExtra(RecognizerIntent.EXTRA_PROMPT, "How do you say \n" +questionArrayList.get(currentQuestion));
try {
startActivityForResult(prompIntent, REQ_CODE_SPEECH_INPUT);
} catch (ActivityNotFoundException a) {
makeText(getApplicationContext(), "speech not supported", Toast.LENGTH_SHORT).show();
}
}
#Override
public void onInit(int status) {
if (status == TextToSpeech.SUCCESS) {
tts.setLanguage(Locale.US);
switch (currentLanguage){
case "Spanish" :
secondTTS.setLanguage(new Locale("es","Es"));
break;
case "Italian" :
secondTTS.setLanguage(Locale.ITALY);
break;
case "German" :
secondTTS.setLanguage(Locale.GERMAN);
break;
case "French" :
secondTTS.setLanguage(Locale.FRENCH);
break;
}
}
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case REQ_CODE_SPEECH_INPUT: {
if (resultCode == RESULT_OK && null != data) {
ArrayList<String> result = data
.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
speechInputTextView.setText(result.get(0));
}
}
String inputSpeechToString = speechInputTextView.getText().toString().toLowerCase();
if (currentQuestion < TOTAL_QUESITONS && inputSpeechToString.contains(correctAnswersArrayList.get(currentQuestion))) {
currentQuestion++;
correctACount++;
correctAnswerTextView.setText(String.valueOf(correctACount));
currentQuestionTextView.setText(String.valueOf(currentQuestion));
Log.d("Onactivity ", "CurrentQ = " + currentQuestion);
startSayWithID(sayCorrectArrayList.get(new Random().nextInt(sayCorrectArrayList.size())), 1000, "instruction");
} else if (inputSpeechToString.contains(STOP_COMMAND)) {
Intent stopIntent = new Intent(UnitActivity.this, PauseActivity.class);
Bundle resultBundle = new Bundle();
resultBundle.putBoolean("isStarted", isStarted);
stopIntent.putExtra("resultBundle", resultBundle);
startActivity(stopIntent);
} else if (inputSpeechToString.contains(PAUSE_COMMAND)) {
Intent pauseI = new Intent(UnitActivity.this, PauseActivity.class);
Bundle resultBundle = new Bundle();
resultBundle.putInt("npc", currentQuestion);
pauseI.putExtra("resultBundle", resultBundle);
startActivity(pauseI);
} else if (inputSpeechToString.contains(RESTART_COMMNAD)) {
currentQuestion = 0;
startSayWithID("Restarted", 1000, "say");
} else if (inputSpeechToString.contains(REPEAT_COMMAND)) {
startSayWithID(questionArrayList.get(currentQuestion), 1000, "question");
} else if (inputSpeechToString.contains(EXIT_COMMAND)) {
Intent homeIntent = new Intent(Intent.ACTION_MAIN);
homeIntent.addCategory(Intent.CATEGORY_HOME);
homeIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(homeIntent);
} else {
startSayWithID(sayWrongArrayList.get(new Random().nextInt(sayWrongArrayList.size())), 1000, "instruction");
wrongACount++;
wrongAnswerTextView.setText(String.valueOf(wrongACount));
Log.d("Onactivity ", "CORRECT = " + correctAnswersArrayList.get(currentQuestion));
Log.d("Onactivity ", "You said : " + inputSpeechToString);
}
}
}
private void addEngQuestions() {
dbHelper = new DBHelper(this);
sqlDB = dbHelper.getReadableDatabase();
String queryEngQuestion = "SELECT English FROM " +currentLanguage+ " WHERE " + "Unit = " +Unit+ " ORDER BY Unit ASC";
Cursor cursor = sqlDB.rawQuery(queryEngQuestion, null);
try {
cursor.moveToFirst();
while (!cursor.isAfterLast()) {
questionArrayList.add(cursor.getString(cursor.getColumnIndex("English")));
cursor.moveToNext();
}
} finally {
cursor.close();
}
Log.d("Line 255", " English Arraylist" + questionArrayList.size());
}
private void addGerCorrect() {
dbHelper = new DBHelper(this);
sqlDB = dbHelper.getReadableDatabase();
String queryGerCOrrect = "SELECT "+ currentLanguage +" FROM "+ currentLanguage + " WHERE "+ "Unit = "+Unit+ " ORDER BY Unit ASC";
Cursor cursor2 = sqlDB.rawQuery(queryGerCOrrect, null);
try {
cursor2.moveToFirst();
while (!cursor2.isAfterLast()) {
correctAnswersArrayList.add(cursor2.getString(cursor2.getColumnIndex(currentLanguage))
.replaceAll("\\p{P}", "").toLowerCase());
cursor2.moveToNext();
}
} finally {
cursor2.close();
}
}
private void startSayWithID(final String text, int mSeconds, final String ID) {
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
#Override
public void run() {
tts.speak(text, TextToSpeech.QUEUE_FLUSH, null, ID);
}
}, mSeconds);
}
private void startAsk(int seconds) {
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
#Override
public void run() {
promptSpeechInput();
}
}, seconds);
}
#Override
protected void onDestroy() {
if (mediaPlayer != null) {
mediaPlayer.stop();
mediaPlayer.release();
}
if (tts != null) {
tts.stop();
tts.shutdown();
}
if (secondTTS != null) {
secondTTS.stop();
secondTTS.shutdown();
}
super.onDestroy();
}

Setting up Google Speech cloud on Android is not a straightforward 1,2,3 process, but I will give you some guidance.
Download the Sample project from here, use the Speech example.
https://github.com/GoogleCloudPlatform/android-docs-samples/tree/master/speech/Speech
Setup a google cloud project, enable the Speech API, and link it to
your gmail account's billing (you get 60min of free speech recognition
every month).
Generate an authentication json, and put it into the "raw" folder of
the sample project.
Setup Google cloud on your computer and obtain an access token.
Insert that access token on your SpeechService.java class.
*Documentation on steps 3 and 4:
https://cloud.google.com/speech/docs/getting-started
*If you run into problems when trying to mimic the sample project into your own project, check this:
Cannot import com.google.cloud.speech.v1.SpeechGrpc in Android
The exact steps are too long to list, I can't even remember them all, if you run into specific trouble let me know.