hello i have an application that connect to specifif device called "Aboabdo" when i open this application it connect to this device then stop the app with message "app was stoped" can i know reason the code is
Code:
package.com.example.ramadan.proj0;
import android.database.Cursor;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.bluetooth.BluetoothSocket;
import android.content.Intent;
import android.telephony.SmsManager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Set;
import java.util.ArrayList;
import java.util.Timer;
import java.util.TimerTask;
import java.util.UUID;
import android.widget.ArrayAdapter;
import android.widget.AdapterView;
public class MainActivity extends AppCompatActivity {
private Set<BluetoothDevice> pairedDevices;
private BluetoothAdapter myBluetooth = null;
private String DEVICE_ADDRESS="Aboabdo";
private BluetoothDevice device;
boolean found=false;
BluetoothSocket btSocket = null;
OutputStream out;
InputStream input;
ListView devicelist;
private static final int DISCOVERABLE_DURATION=500;
private static final int ENABLE_BT_REQUEST_CODE=1;
DatabaseHelper help;
ArrayList<list> items;
//SPP UUID. Look for it
static final UUID myUUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ArrayList<list> items=new ArrayList<list>();
help=new DatabaseHelper(this);
addData();
myBluetooth = BluetoothAdapter.getDefaultAdapter();
if (myBluetooth == null) {
// Device does not support Bluetooth
Toast.makeText(getApplicationContext(),"Device doesnt Support Bluetooth",Toast.LENGTH_SHORT).show();
finish();
}else{
if(!myBluetooth.isEnabled())
{
Intent enableAdapter = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableAdapter, 0);
}}
//////////////////////////////////////////////
device();
if(found){
try {
btSocket = device.createRfcommSocketToServiceRecord(myUUID); btSocket.connect();
}catch (IOException ex){
Toast.makeText(getApplicationContext(),ex.getMessage(),Toast.LENGTH_LONG).show();
}
try {
out=btSocket.getOutputStream();
} catch (IOException e) {
e.printStackTrace();
}
try {
input=btSocket.getInputStream();
} catch (IOException e) {
e.printStackTrace();
}
}
else{
Toast.makeText(getApplicationContext(),"Please make sure of your device",Toast.LENGTH_LONG).show();finish();
}
/////////////////////////////////////////////////////////////////////////////////////////////////////
final Handler handler = new Handler();
Timer timer = new Timer();
TimerTask doAsynchronousTask = new TimerTask() {
@Override
public void run() {
handler.post(new Runnable() {
public void run() {
try {
//yout method here
fill();
} catch (Exception e) {
}
}
});
}
};
timer.schedule(doAsynchronousTask, 0, 900000); //execute in every 15 ms
//fill();
mylist list=new mylist(items);
devicelist = (ListView)findViewById(R.id.listView);
devicelist.setAdapter(list);
devicelist.setOnClickListener((View.OnClickListener) myListClickListener);
}
@Override
protected void onDestroy() {
super.onDestroy();
try {
btSocket.close();
} catch (IOException e) {
}
}
///////////////////////////
public void onActivityResult(int requestCode, int resultCode,Intent data) {
if (requestCode == ENABLE_BT_REQUEST_CODE) {
// other code
} else if (requestCode == 0){
if (resultCode == DISCOVERABLE_DURATION){
Toast.makeText(getApplicationContext(), "Your device is now discoverable by other devices for " +
DISCOVERABLE_DURATION + " seconds",
Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(getApplicationContext(), "Fail to enable discoverability on your device.",
Toast.LENGTH_SHORT).show();
}
}}
private AdapterView.OnItemClickListener myListClickListener = new AdapterView.OnItemClickListener()
{
public void onItemClick (AdapterView<?> av, View v, int arg2, long arg3)
{
// Get the device MAC address, the last 17 chars in the View
TextView txtname=(TextView)v.findViewById(R.id.textView3);
Cursor c=help.retrievecolumn(txtname.getText().toString());
String n="";
float re=0;
if(c.getCount()>0){
while (c.moveToNext()) {
n= c.getString(0);
re=c.getFloat(2);
}}
// String address ;
// Make an intent to start next activity.
Intent i = new Intent(MainActivity.this, Show.class);
//Change the activity.
i.putExtra("name", n);
i.putExtra("itemename", txtname.getText().toString());
i.putExtra("scale", re);
startActivity(i);
}
};
/////////////////////////////////////////////
public void fill(){
Cursor c=help.retrieveData();
if(c.getCount()>0){
list l=new list();
while (c.moveToNext()){
l.name=c.getString(1);
// Log.d(null,l.name);
//out.write(c.getString(0).toString().getBytes());
try {
out.write(c.getString(0).toString().getBytes());
} catch (IOException e) {
e.printStackTrace();
}
byte[] b=new byte[24];
float re=0;
try {
re=input.read(b);
if(re<=c.getFloat(2)){
//send sms to user
Cursor s=help.retrieveuser();
if(s.getCount()>0) {
SmsManager msg = SmsManager.getDefault();
String message = "please buy alot of "+c.getString(1);
msg.sendTextMessage( c.getString(1).toString(),null,message,null,null);
/*Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("sms:" + phoneNumber));
intent.putExtra("sms_body", message);
startActivity(intent);*/
}
////////////////////////////////
}
} catch (IOException e) {
e.printStackTrace();
}
l.scale=re;
items.add(l);
}
}else{return;}
}
public float read(String x){
//Calendar c=Calendar.getInstance();
try {
out.write(x.toString().getBytes());
} catch (IOException e) {
e.printStackTrace();
}
byte[] b=new byte[24];
float re=0;
try {
re=input.read(b);
} catch (IOException e) {
e.printStackTrace();
}
return re;
}
public void device(){
pairedDevices = myBluetooth.getBondedDevices();
if(pairedDevices.isEmpty()) {
Toast.makeText(getApplicationContext(),"Please Pair the Device first",Toast.LENGTH_SHORT).show();
} else {
for (BluetoothDevice iterator : pairedDevices) {
if(iterator.getName().equals(DEVICE_ADDRESS)) //Replace with iterator.getName() if comparing Device names.
{
device=iterator; //device is an object of type BluetoothDevice
found=true;
myBluetooth.getDefaultAdapter().cancelDiscovery();
break;
} } }
}//end of function device();
private void Disconnect()
{
if (btSocket!=null) //If the btSocket is busy
{
try
{
btSocket.close(); //close connection
}
catch (IOException ex)
{ Toast.makeText(getApplicationContext(),ex.getMessage(),Toast.LENGTH_LONG).show();}
}
finish(); //return to the first layout
}
public void addData(){
help.insertData("1","Tomate",3.0);
help.insertData("2","Carrot",2.0);
help.insertData("3","Apple",1.0);
help.insertData("4","Banana",2.0);
help.insertuser("sayed","01120325303");
}
///////////////////////////////////
private void readFromSensor(String c)
{
if (btSocket!=null)
{
try
{
out.write(c.toString().getBytes());
}
catch (IOException e)
{
Toast.makeText(getApplicationContext(),e.getMessage(),Toast.LENGTH_LONG).show();}
}
}
///class for list
class mylist extends BaseAdapter
{
ArrayList<list> items=new ArrayList<list>();
mylist( ArrayList<list> items){
this.items=items;
}
@Override
public int getCount(){
return items.size();
}
@Override
public String getItem(int position){
return items.get(position).name;
}
@Override
public long getItemId(int position){
return position;
}
@Override
public View getView(int i, View view, ViewGroup viewroup){
LayoutInflater inflate=getLayoutInflater();
View view1=inflate.inflate(R.layout.row,null);
TextView txtname=(TextView) view1.findViewById(R.id.textView3);
TextView txtscale=(TextView) view1.findViewById(R.id.textView2);
txtname.setText(items.get(i).name);
txtscale.setText(items.get(i).scale.toString());
return view1;
}
}
/*private class ConnectedThread extends Thread {
private final BluetoothSocket mmSocket;
private final InputStream mmInStream;
private final OutputStream mmOutStream;
public ConnectedThread(BluetoothSocket socket) {
mmSocket = socket;
InputStream tmpIn = null;
OutputStream tmpOut = null;
// Get the input and output streams, using temp objects because
// member streams are final
try {
tmpIn = socket.getInputStream();
tmpOut = socket.getOutputStream();
} catch (IOException e) { }
mmInStream = tmpIn;
mmOutStream = tmpOut;
}
public void run() {
byte[] buffer = new byte[1024]; // buffer store for the stream
int bytes; // bytes returned from read()
// Keep listening to the InputStream until an exception occurs
while (true) {
try {
// Read from the InputStream
bytes = mmInStream.read(buffer);
// Send the obtained bytes to the UI activity
mHandler.obtainMessage(MESSAGE_READ, bytes, -1, buffer)
.sendToTarget();
} catch (IOException e) {
break;
}
}
}
public void write(byte[] bytes) {
try {
mmOutStream.write(bytes);
} catch (IOException e) { }
}
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) { }
}
}*/
}
Last edited by a moderator:
Facebook
Twitter
Instagram