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Android Java app fails to send selected file/data via Bluetooth

My current android app can turn on Bluetooth, make itself discoverable, list paired devices, and select a file from the device ( ie an image). However when I attempted to hit "send" the app seems to crash with an error. Not sure if it's refusing to send, or if it's not actually obtaining the file (yesterday I had a problem where it refused to send the selected, saying for me to select a file repeatedly. I will post the crash results and my mainActivity code. If anyone suggestions or ideas, please let me know.
Error: Debugging device
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.bluetooth_demoproject, PID: 17593
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=300, data=null} to activity {com.example.bluetooth_demoproject/com.example.bluetooth_demoproject.MainActivity}: android.os.FileUriExposedException: file:///storage/emulated/0/Pictures/Screenshots/Screenshot_20161013-215137.png exposed beyond app through ClipData.Item.getUri()
at android.app.ActivityThread.deliverResults(ActivityThread.java:4107)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4150)
at android.app.ActivityThread.-wrap20(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1517)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6120)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
Caused by: android.os.FileUriExposedException: file:///storage/emulated/0/Pictures/Screenshots/Screenshot_20161013-215137.png exposed beyond app through ClipData.Item.getUri()
at android.os.StrictMode.onFileUriExposed(StrictMode.java:1799)
at android.net.Uri.checkFileUriExposed(Uri.java:2346)
at android.content.ClipData.prepareToLeaveProcess(ClipData.java:832)
at android.content.Intent.prepareToLeaveProcess(Intent.java:8909)
at android.content.Intent.prepareToLeaveProcess(Intent.java:8894)
at android.app.Instrumentation.execStartActivity(Instrumentation.java:1517)
at android.app.Activity.startActivityForResult(Activity.java:4224)
at android.app.Activity.startActivityForResult(Activity.java:4183)
at android.app.Activity.startActivity(Activity.java:4507)
at android.app.Activity.startActivity(Activity.java:4475)
at com.example.bluetooth_demoproject.MainActivity.onActivityResult(MainActivity.java:350)
at android.app.Activity.dispatchActivityResult(Activity.java:6917)
at android.app.ActivityThread.deliverResults(ActivityThread.java:4103)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4150) 
at android.app.ActivityThread.-wrap20(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1517) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:154) 
at android.app.ActivityThread.main(ActivityThread.java:6120) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755) 
Disconnected from the target VM, address: 'localhost:8601', transport: 'socket'
Here is my MainActivity
package com.example.bluetooth_demoproject;
import android.app.Activity;
import android.app.Dialog;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.net.Uri;
import android.os.Environment;
import android.view.Menu;
import android.view.MenuItem;
import android.bluetooth.BluetoothA2dp;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import java.util.Set;
import java.io.File;
import java.util.List;
import java.util.ArrayList;
public class MainActivity extends Activity {
// Creating objects -----------------------------
private static final int REQUEST_ENABLE_BT = 0;
private static final int REQUEST_BLU = 1;
// private static final int REQUEST_DISCOVER_BT_ = 1;
private static int CUSTOM_DIALOG_ID = 0;
ListView dialog_ListView;
TextView mBluetoothStatus, mPairedDevicesList, mTextFolder;
ImageView mBluetoothIcon;
Button mOnButton, 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_BLU);
}
}
});
// 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 void onPrepareDialog(int id, Dialog dialog) {
// super.onPrepareDialog(id, dialog);
// switch (id) {
// case CUSTOM_DIALOG_ID:
// ListDir(curFolder);
// break;
// }
// }
#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("Select Files");
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 discoveryIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
discoveryIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, DISCOVER_DURATION);
startActivityForResult(discoveryIntent, REQUEST_BLU);
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == DISCOVER_DURATION && requestCode == REQUEST_BLU) {
Intent i = new Intent();
i.setAction(Intent.ACTION_SEND);// STOPPED HERE-----------------------------------------------------------------
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;
break;
}
}
//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
// if (id == R.id.action_settings) {
// Toast.makeText(this, "**********************************\nDeveloper: www.santoshkumarsingh.com\n**********************************", Toast.LENGTH_LONG).show();
// return true;
// }
return super.onOptionsItemSelected(item);
}
//toast message function
private void showToast(String msg) {
Toast.makeText(this, msg, Toast.LENGTH_SHORT) .show();
}
}

You have trouble with file exchange not with BLE.
Did you ever read Android FileUriExposedException?

I cannot get TTS to speak in different language autometic. It is always speaking in English

I want to make an application which can speak a different language, the text of which which will be written in a text field, which may be English, Bengali or any other language. I use this code but can not speak in different language. It is always speaking in English or which language I set in Google-Text-speech from phone setting.
Here is my java code
package com.example.texttospeech;
import android.util.Log;
import java.util.Locale;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.speech.tts.TextToSpeech;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity implements TextToSpeech.OnInitListener, OnClickListener {
TextToSpeech tts;
EditText input;
TextView TextCount;
Button b1, b2;
Thread thread;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
input = (EditText) findViewById(R.id.editText);
TextCount = (TextView) findViewById(R.id.TextCount);
b1 = (Button) findViewById(R.id.button);
b2 = (Button) findViewById(R.id.button1);
b1.setOnClickListener(this);
b2.setOnClickListener(this);
tts = new TextToSpeech(this, this);
TextCountNow();
}
#SuppressWarnings("deprecation")
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.button:
String text = input.getText().toString();
if (text.isEmpty()) {
String EmptyText = "Nothing found in text fild. please Write something to read.";
tts.speak(EmptyText, TextToSpeech.QUEUE_FLUSH, null);
Toast.makeText(MainActivity.this, "Text is empty", Toast.LENGTH_LONG).show();
} else if (text.length() > 5000) {
String FaildText = "Text Ought of length. Maximum length is 5000. Please remove some text and try again";
tts.speak(FaildText, TextToSpeech.QUEUE_FLUSH, null);
Toast.makeText(getApplicationContext(), "Ought of length. Maximum length is 5000.", Toast.LENGTH_LONG).show();
} else {
String ReadingText = text + ". Text reading completed";
tts.speak(ReadingText, TextToSpeech.QUEUE_FLUSH, null);
}
break;
case R.id.button1:
input.setText("");
break;
}
}
#Override
public void onInit(int status) {
if (status == TextToSpeech.SUCCESS){
#SuppressWarnings("deprecation")
Locale bahasa = tts.getLanguage();
int result = tts.setLanguage(bahasa);
if (result == TextToSpeech.LANG_MISSING_DATA || result == TextToSpeech.LANG_NOT_SUPPORTED) {
Toast.makeText(MainActivity.this, "This Language is not supported", Toast.LENGTH_SHORT).show();
Log.e("TTS", "This Language is not supported");
} else {
//do nathing
}
} else {
Log.e("TTS", "initialization faild");
}
}
public void TextCountNow(){
final Handler h = new Handler();
Runnable r = new Runnable() {
public void run() {
int textLanth = input.getText().length();
TextCount.setText("" + textLanth);
h.postDelayed(this, 500);
}
};
h.postDelayed(r, 500);
}
}

For Bengali Language :
#Override
public void onInit(int i) {
if (i == TextToSpeech.SUCCESS) {
int result = textToSpeechService.setLanguage(new Locale("bn"));
if (result == TextToSpeech.LANG_MISSING_DATA
|| result == TextToSpeech.LANG_NOT_SUPPORTED
) {
Toast.makeText(mContext, "Speech Service Not Ready", Toast.LENGTH_SHORT).show();
} else {
textToSpeechService.setOnUtteranceProgressListener(new UtteranceProgressListener() {
#Override
public void onStart(String utteranceId) {
}
#Override
public void onDone(String utteranceId) {
stopBanglaReading();
}
#Override
public void onError(String utteranceId) {
}
});
int voicePitch = settings.getInt("ExplVoicePitch", 10);
int voiceSpeed = settings.getInt("ExplVoiceSpeed", 8);
textToSpeechService.setSpeechRate((float) voiceSpeed / 10);
textToSpeechService.setPitch((float) voicePitch / 10);
startSpeaking(onubad);
}
} else {
Toast.makeText(mContext, "Speech Service Not Ready, Please Try Again....", Toast.LENGTH_LONG).show();
}
}
});

how to show received sms in textview instead of toast

I am currently working on a simple android application to read an SMS and print it in TexView instead of Toast. but in receiver activity, we do not initialise "findbyid" so we can't print the SMS in textView. now I am showing SMS in Toast to test but I do not want it in a toast. I am also read questions/answer and also other articles but can't find what I want.
receiver activity,
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.telephony.SmsMessage;
import android.util.Log;
import android.widget.Toast;
public class read_sms extends BroadcastReceiver {
// Get the object of SmsManager
#Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
final Bundle bundle = intent.getExtras();
try {
if (bundle != null) {
final Object[] pdusObj = (Object[]) bundle.get("pdus");
for (int i = 0; i < pdusObj.length; i++) {
SmsMessage currentMessage = SmsMessage.createFromPdu((byte[]) pdusObj[i]);
String phoneNumber = currentMessage.getDisplayOriginatingAddress();
String senderNum = phoneNumber;
String message = currentMessage.getDisplayMessageBody();
Log.i("SmsReciver", "senderNum: " + senderNum + ", message: " + message);
//ourSMS.getSmsDetails(senderNum, message);
// Show SMS notification
//Toast.makeText(context, "senderNum: "+ senderNum + ", message: " + message, Toast.LENGTH_LONG).show();
if(message.equals("Milind")){
Toast.makeText(context, "sms matched", Toast.LENGTH_LONG).show();
}else {
Toast.makeText(context, "not matched", Toast.LENGTH_LONG).show();
}
} // end of for loop
} // bundle
} catch (Exception e) {
// TODO: handle exception
Log.e("SmsReciver", "Exception smsReciver" + e);
}
}
}
my home activity is empty because I can't find which code placed here.
public class home extends AppCompatActivity {
TextView SMS_textview;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.home);
SMS_textview = (TextView) findViewById(R.id.sms_text);
}
}

change that TextView to
public static TextView SMS_textview;
add method
public void recivedSms(String message)
{
try
{
SMS_textview.setText(message);
}
catch (Exception e)
{
}
}
in read_sms class add the following code when you recieve sms
home Sms = new home();
Sms.recivedSms(message );

Register your Receiver in your activity whenever you Receive a text in receiver
use this code in your Receiver class
Intent broadcastIntent = new Intent();
broadcastIntent.putExtra("your key", your Value);
broadcastIntent.setAction("link from you have recieve a text");
context.sendBroadcast(broadcastIntent);
after this register a broadcast Receiver in your activity like this
private void registerSmsReciever() {
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction("link from you have recieve a text");
BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
Log.d("onReceive", "Sms recieved in progress");
String message= intent.getStringExtra("key");
textView.setText(intent.getStringExtra("key"));
}
};
registerReceiver(broadcastReceiver, intentFilter);
}

Bluetooth disconnects when scanning barcode

I am using a Bluetooth printer and zxing barcode scanner for this project. My problem is that after I have the Bluetooth printer connected and I try to scan a barcode, using zxing, it disconnects the Bluetooth printer. Here is my code.
package com.zj.printdemo;
import com.zj.printdemo.R;
import android.app.Fragment;
import android.content.Intent;
import com.zj.btsdk.BluetoothService;
import com.zj.btsdk.PrintPic;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import com.google.zxing.integration.android.IntentIntegrator;
import com.google.zxing.integration.android.IntentResult;
import android.view.View.OnClickListener;
import android.util.Log;
import android.view.ViewGroup;
public class PrintDemo extends Activity {
Button btnSearch;
Button btnSendDraw;
Button btnSend;
//Button btnClose;
Button clearBtn;
Button btnBarcode;
EditText edtContext;
EditText edtContextQTY;
EditText edtPrint;
private static final int REQUEST_ENABLE_BT = 2;
BluetoothService mService = null;
BluetoothDevice con_dev = null;
private static final int REQUEST_CONNECT_DEVICE = 1;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
//Button clearBtn = (Button)findViewById(R.id.btnClear);
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//edtContext = (EditText) findViewById(R.id.txt_content);
mService = new BluetoothService(this, mHandler);
if( mService.isAvailable() == false ){
Toast.makeText(this, "Bluetooth is not available", Toast.LENGTH_LONG).show();
finish();
}
clearBtn = (Button)findViewById(R.id.btnClear);
OnClickListener ClearOnClickListener = new OnClickListener(){
#Override
public void onClick(View v) {
edtContext.setText("");
edtContextQTY.setText("");
}
};
clearBtn.setOnClickListener(ClearOnClickListener);
btnBarcode = (Button) findViewById(R.id.btnBarcode);
OnClickListener BarcodeOnClickListener = new OnClickListener() {
#Override
public void onClick(View v) {
if (v.getId() == R.id.btnBarcode) {
IntentIntegrator integrator = new IntentIntegrator(PrintDemo.this);
integrator.initiateScan();
}
}
};
btnBarcode.setOnClickListener(BarcodeOnClickListener);
}
public void onStart() {
super.onStart();
if( mService.isBTopen() == false)
{
Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableIntent, REQUEST_ENABLE_BT);
}
try {
btnSendDraw = (Button) this.findViewById(R.id.btn_test);
btnSendDraw.setOnClickListener(new ClickEvent());
btnSearch = (Button) this.findViewById(R.id.btnSearch);
btnSearch.setOnClickListener(new ClickEvent());
btnSend = (Button) this.findViewById(R.id.btnSend);
btnSend.setOnClickListener(new ClickEvent());
//btnClose = (Button) this.findViewById(R.id.btnClose);
//btnClose.setOnClickListener(new ClickEvent());
edtContext = (EditText) findViewById(R.id.txt_content);
edtContextQTY = (EditText) findViewById(R.id.txt_contentQTY);
//btnClose.setEnabled(false);
btnSend.setEnabled(false);
btnSendDraw.setEnabled(false);
} catch (Exception ex) {
Log.e("������Ϣ",ex.getMessage());
}
}
#Override
protected void onDestroy() {
super.onDestroy();
if (mService != null)
mService.stop();
mService = null;
}
class ClickEvent implements View.OnClickListener {
public void onClick(View v) {
if (v == btnSearch) {
Intent serverIntent = new Intent(PrintDemo.this,DeviceListActivity.class);
startActivityForResult(serverIntent, REQUEST_CONNECT_DEVICE);
} else if (v == btnSend) {
String msg = edtContext.getText().toString();
String msgQTY = edtContextQTY.getText().toString();
if( msg.length() > 0 ){
mService.sendMessage("ItemID:"+msg+"\n","ItemQTY:"+msgQTY+"\n");
}
} //else if (v == btnClose) {
//mService.stop();}
else if (v == btnSendDraw) {
String msg = "";
String lang = getString(R.string.strLang);
//printImage();
byte[] cmd = new byte[3];
cmd[0] = 0x1b;
cmd[1] = 0x21;
if((lang.compareTo("en")) == 0){
cmd[2] |= 0x10;
mService.write(cmd);
mService.sendMessage("Congratulations!\n", "GBK");
cmd[2] &= 0xEF;
mService.write(cmd);
msg = " You have sucessfully created communications between your device and our bluetooth printer.\n\n"
+" the company is a high-tech enterprise which specializes" +
" in R&D,manufacturing,marketing of thermal printers and barcode scanners.\n\n";
mService.sendMessage(msg,"GBK");
}else if((lang.compareTo("ch")) == 0){
cmd[2] |= 0x10;
mService.write(cmd);
mService.sendMessage("��ϲ����\n", "GBK");
cmd[2] &= 0xEF;
mService.write(cmd);
msg = " ���Ѿ��ɹ��������������ǵ�������ӡ����\n\n"
+ " ����˾��һ��רҵ�����з�����������������Ʊ�ݴ�ӡ��������ɨ���豸��һ��ĸ߿Ƽ���ҵ.\n\n";
mService.sendMessage(msg,"GBK");
}
}
}
}
/**
* Handler BluetoothService
*/
private final Handler mHandler = new Handler() {
#Override
public void handleMessage(Message msg) {
switch (msg.what) {
case BluetoothService.MESSAGE_STATE_CHANGE:
switch (msg.arg1) {
case BluetoothService.STATE_CONNECTED:
Toast.makeText(getApplicationContext(), "Connect successful",
Toast.LENGTH_SHORT).show();
//btnClose.setEnabled(true);
btnSend.setEnabled(true);
btnSendDraw.setEnabled(true);
break;
case BluetoothService.STATE_CONNECTING:
Log.d("��������","��������.....");
break;
case BluetoothService.STATE_LISTEN:
case BluetoothService.STATE_NONE:
Log.d("StateNone","�ȴ�����.....");
break;
}
break;
case BluetoothService.MESSAGE_CONNECTION_LOST:
Toast.makeText(getApplicationContext(), "Device connection was lost",
Toast.LENGTH_SHORT).show();
//btnClose.setEnabled(false);
btnSend.setEnabled(false);
btnSendDraw.setEnabled(false);
break;
case BluetoothService.MESSAGE_UNABLE_CONNECT:
Toast.makeText(getApplicationContext(), "Unable to connect device",
Toast.LENGTH_SHORT).show();
break;
}
}
};
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case REQUEST_ENABLE_BT:
if (resultCode == Activity.RESULT_OK) {
Toast.makeText(this, "Bluetooth open successful", Toast.LENGTH_LONG).show();
} else {
finish();
}
break;
case REQUEST_CONNECT_DEVICE:
if (resultCode == Activity.RESULT_OK) {
String address = data.getExtras()
.getString(DeviceListActivity.EXTRA_DEVICE_ADDRESS);
con_dev = mService.getDevByMac(address);
mService.connect(con_dev);
}
break;
case IntentIntegrator.REQUEST_CODE:
IntentResult scanningResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
if (scanningResult != null) {
String scanContent = scanningResult.getContents();
String scanFormat = scanningResult.getFormatName();
//formatTxt.setText("FORMAT: " + scanFormat);
edtContext.setText(scanContent);
} else {
Toast toast = Toast.makeText(getApplicationContext(),
"No scan data received!", Toast.LENGTH_SHORT);
toast.show();
}
break;
}
}
#SuppressLint("SdCardPath")
private void printImage() {
byte[] sendData = null;
PrintPic pg = new PrintPic();
pg.initCanvas(384);
pg.initPaint();
pg.drawImage(0, 0, "/mnt/sdcard/icon.jpg");
sendData = pg.printDraw();
mService.write(sendData);
}
}
My goal is to connect the printer, scan a barcode, and print a tag with the ID and quantity. Manual entry works, the printer works, and the barcode scanning works. Its only when you use the barcode scanner after you connect the printer that it will disconnect the printer.

How to display NDEF message after NDEF discovered/activity launched?

Have read through a number of questions similar to mine - I can only apologise if I have missed the solution to my woes, but I really can't work this out!
I have managed to get my nfc activity working - tapping the tag launches the correct activity of my app - but the ndef message is not displayed and I can't figure out why...
The tag is a Mifare Ultralight with a Plain Text message encoded. (mimetype: plain/text)
Here's my code, thank you all for your help, this forum should have a 'donate a beer' button!
package com.example.prototype02;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.PendingIntent;
import android.content.Intent;
import android.content.IntentFilter;
import android.nfc.NdefMessage;
import android.nfc.NfcAdapter;
import android.os.Bundle;
import android.os.Parcelable;
import android.widget.Toast;
public class nfcActivity extends Activity {
private static final String TAG = "NFCReadTag";
private NfcAdapter mNfcAdapter;
private IntentFilter[] mNdefExchangeFilters;
private PendingIntent mNfcPendingIntent;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.nfclayout);
mNfcAdapter = NfcAdapter.getDefaultAdapter(this);
mNfcPendingIntent = PendingIntent.getActivity(this, 0, new Intent(this,
getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP
| Intent.FLAG_ACTIVITY_CLEAR_TOP), 0);
IntentFilter nfcIntent = new IntentFilter(NfcAdapter.ACTION_NDEF_DISCOVERED);
nfcIntent.addDataScheme("text/plain");
mNdefExchangeFilters = new IntentFilter[] { nfcIntent };
}
#Override
protected void onPause() {
super.onPause();
if(mNfcAdapter != null) mNfcAdapter.disableForegroundDispatch(this);
}
#Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
if (mNfcAdapter.ACTION_NDEF_DISCOVERED.equals(intent.getAction())) {
NdefMessage[] messages = null;
Parcelable[] rawMsgs = intent.getParcelableArrayExtra(mNfcAdapter.EXTRA_NDEF_MESSAGES);
if (rawMsgs != null) {
messages = new NdefMessage[rawMsgs.length];
for (int i = 0; i < rawMsgs.length; i++) {
messages[i] = (NdefMessage) rawMsgs[i];
}}
else if (rawMsgs == null){
Toast.makeText(getApplicationContext(), "No NDEF Message Read", Toast.LENGTH_LONG).show();
}
if(messages[0] != null) {
String result="";
byte[] payload = messages[0].getRecords()[0].getPayload();
for (int b = 1; b<payload.length; b++) { // skip SOH
result += (char) payload[b];
}
Toast.makeText(getApplicationContext(), "Safe Location Registered - " + result, Toast.LENGTH_SHORT).show();
}
}
else Toast.makeText(getApplicationContext(), "Intent Error...", Toast.LENGTH_LONG).show();
}
}

If your activity is started by the NFC intent, then onNewIntent() will not be called (it will only be called when you scan the tag when the activity is already in the foreground). Try doing something like calling onNewIntent(getIntent()) in onCreate().

Try something like this: (taken from StickyNotes NFC sample)
#Override
protected void onResume() {
super.onResume();
mResumed = true;
// Sticky notes received from Android
if (NfcAdapter.ACTION_NDEF_DISCOVERED.equals(getIntent().getAction())) {
NdefMessage[] messages = getNdefMessages(getIntent());
byte[] payload = messages[0].getRecords()[0].getPayload();
setNoteBody(new String(payload));
setIntent(new Intent()); // Consume this intent.
}
enableNdefExchangeMode();
}
#Override
protected void onPause() {
super.onPause();
mResumed = false;
mNfcAdapter.disableForegroundNdefPush(this);
}
#Override
protected void onNewIntent(Intent intent) {
// NDEF exchange mode
if (!mWriteMode && NfcAdapter.ACTION_NDEF_DISCOVERED.equals(intent.getAction())) {
NdefMessage[] msgs = getNdefMessages(intent);
promptForContent(msgs[0]);
}
// Tag writing mode
if (mWriteMode && NfcAdapter.ACTION_TAG_DISCOVERED.equals(intent.getAction())) {
Tag detectedTag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
writeTag(getNoteAsNdef(), detectedTag);
}
}