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gammelT300
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Hoffentlich im richtigen Forum, wenn nicht bitte verschieben.
Hallo, ich möchte eine App entwickeln, die eine bluetooth-verbindung aufbaut und Messdaten empfängt. Diese sollen einfach angezeigt werden. Durch einen Klick auf ein Button soll man dann die Werte aktualisieren können, siehe Code. Und alles soll, wenn möglich in einer Aktivität umgesetzt werden.
Leider stürzt die app immer, wenn ich sie auf meinem smartphone starte ab. Kann mir jemand weiter helfen?!!
Danke
Hallo, ich möchte eine App entwickeln, die eine bluetooth-verbindung aufbaut und Messdaten empfängt. Diese sollen einfach angezeigt werden. Durch einen Klick auf ein Button soll man dann die Werte aktualisieren können, siehe Code. Und alles soll, wenn möglich in einer Aktivität umgesetzt werden.
Leider stürzt die app immer, wenn ich sie auf meinem smartphone starte ab. Kann mir jemand weiter helfen?!!
Danke
Code:
package com.example.ziel;
import java.io.IOException;
import java.lang.reflect.Array;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Set;
import java.util.UUID;//test
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
import android.widget.TextView;
public class Main_Activity extends Activity implements OnItemClickListener {
private Handler handler;
String value;
Array parts;
ArrayAdapter<String> listAdapter;
ListView listView;
BluetoothAdapter btAdapter;
Set<BluetoothDevice> devicesArray;
ArrayList<String> pairedDevices;
ArrayList<BluetoothDevice> devices;
public static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
protected static final int SUCCESS_CONNECT = 0;
protected static final int MESSAGE_READ = 1;
IntentFilter filter;
BroadcastReceiver receiver;
String tag = "debugging";
String ring= "525,32.565,32.232,52.523,25.112,23.123,23.123,35.127,98.212,23.";
TextView textview1;
TextView textview2;
TextView textview3;
TextView textview4;
TextView textview5;
TextView textview6;
Button button1;
public void aufteilen() {
String[] parts = ring.split("\\.");
textview2.setText("Temp2 "+parts[0]);
textview3.setText("Temp3 "+parts[1]);
textview4.setText("Temp4 "+parts[2]);
textview5.setText("Temp5 "+parts[3]);
textview6.setText("Temp6 "+parts[4]);
}
Handler mHandler = new Handler(){
@Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
Log.i(tag, "in handler");
super.handleMessage(msg);
switch(msg.what){
case SUCCESS_CONNECT:
// aktionen
ConnectedThread connectedThread = new ConnectedThread((BluetoothSocket)msg.obj);
Toast.makeText(getApplicationContext(), "CONNECT", 0).show();
String s = "successfully connected";
connectedThread.write(s.getBytes());
Log.i(tag, "connected");
break;
case MESSAGE_READ: // HIER
byte[] readBuf = (byte[])msg.obj;
String string = new String(readBuf);
Toast.makeText(getApplicationContext(), string, 0).show();
break;
}
}
};
@Override
public void onCreate(Bundle savedInstanceState) {
textview2 = (TextView) findViewById(R.id.textView2);
textview3 = (TextView) findViewById(R.id.textView3);
textview4 = (TextView) findViewById(R.id.textView4);
textview5 = (TextView) findViewById(R.id.textView5);
textview6 = (TextView) findViewById(R.id.textView6);
final Button button1 = (Button) findViewById(R.id.button);
button1.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
ring = "995,32.757,56.454,87.646,56.556,45.457,74.754,57.435,34.463,46";
aufteilen();
}});
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
init();
if(btAdapter==null){
Toast.makeText(getApplicationContext(), "No bluetooth detected", 0).show();
finish();
}
else{
if(!btAdapter.isEnabled()){
turnOnBT();
}
getPairedDevices();
startDiscovery();
}
}
private void startDiscovery() {
// TODO Auto-generated method stub
btAdapter.cancelDiscovery();
btAdapter.startDiscovery();
}
private void turnOnBT() {
// TODO Auto-generated method stub
Intent intent =new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(intent, 1);
}
private void getPairedDevices() {
// TODO Auto-generated method stub
devicesArray = btAdapter.getBondedDevices();
if(devicesArray.size()>0){
for(BluetoothDevice device:devicesArray){
pairedDevices.add(device.getName());
}
}
}
private void init() {
// TODO Auto-generated method stub
listView=(ListView)findViewById(R.id.bConnectedNew);
listView.setOnItemClickListener(this);
listAdapter= new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,0);
listView.setAdapter(listAdapter);
btAdapter = BluetoothAdapter.getDefaultAdapter();
pairedDevices = new ArrayList<String>();
filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
devices = new ArrayList<BluetoothDevice>();
receiver = new BroadcastReceiver(){
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
String action = intent.getAction();
if(BluetoothDevice.ACTION_FOUND.equals(action)){
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
devices.add(device);
String s = "";
for(int a = 0; a < pairedDevices.size(); a++){
if(device.getName().equals(pairedDevices.get(a))){
//hinzufügen
s = "(Paired)";
break;
}
}
listAdapter.add(device.getName()+" "+s+" "+"\n"+device.getAddress());
}
else if(BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action)){
// macht irgendwas
}
else if(BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)){
// macht irgendwas
}
else if(BluetoothAdapter.ACTION_STATE_CHANGED.equals(action)){
if(btAdapter.getState() == btAdapter.STATE_OFF){
turnOnBT();
}
}
}
};
registerReceiver(receiver, filter);
filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
registerReceiver(receiver, filter);
filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
registerReceiver(receiver, filter);
filter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);
registerReceiver(receiver, filter);
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
unregisterReceiver(receiver);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if(resultCode == RESULT_CANCELED){
Toast.makeText(getApplicationContext(), "Bluetooth must be enabled to continue", Toast.LENGTH_SHORT).show();
finish();
}
}
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
if(btAdapter.isDiscovering()){
btAdapter.cancelDiscovery();
}
if(listAdapter.getItem(arg2).contains("Paired")){
BluetoothDevice selectedDevice = devices.get(arg2);
ConnectThread connect = new ConnectThread(selectedDevice);
connect.start();
Log.i(tag, "in click listener");
}
else{
Toast.makeText(getApplicationContext(), "device is not paired", 0).show();
}
}
private class ConnectThread extends Thread {
private final BluetoothSocket mmSocket;
private final BluetoothDevice mmDevice;
public ConnectThread(BluetoothDevice device) {
// temporäres objekt wird genutzt, welches später zu mmSocket zugewiesen wird,
// weil mmSocket ist starr
BluetoothSocket tmp = null;
mmDevice = device;
Log.i(tag, "construct");
// Holt BluetoothSocket um mit gegebenen BluetoothDevice zu verbinden
try {
// MY_UUID ist der app's UUID string,wird auch vom servercode genutzt
tmp = device.createRfcommSocketToServiceRecord(MY_UUID);
} catch (IOException e) {
Log.i(tag, "get socket failed");
}
mmSocket = tmp;
}
public void run() {
// unterbricht suche, weil es sonst zu sehr verlangsamen würde
btAdapter.cancelDiscovery();
Log.i(tag, "connect - run");
try {
// Über socket werden die Geräte verbunden, bis eine exception greift
mmSocket.connect();
Log.i(tag, "connect - succeeded");
} catch (IOException connectException) { Log.i(tag, "connect failed");
// wenn man nicht verbinden kann, anwendungen schließen
try {
mmSocket.close();
} catch (IOException closeException) { }
return;
}
// Sachen zum managen der Verbindung (in separaten thread)
}
/** Will cancel an in-progress connection, and close the socket */
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) { }
}
}
public 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; // 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
buffer = new byte[1024];
bytes = mmInStream.read(buffer);
// sendet zu UI-Activity
mHandler.obtainMessage(MESSAGE_READ, bytes, -1, buffer)
.sendToTarget();
} catch (IOException e) {
break;
}
}
}
/* Call this from the main activity to send data to the remote device */
public void write(byte[] bytes) {
try {
mmOutStream.write(bytes);
} catch (IOException e) {
}
}
/* Call this from the main activity to shutdown the connection */
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) {
}
}
} }
/*public static String convertStreamToString( InputStream is, String ecoding ) throws IOException
{
StringBuilder sb = new StringBuilder( Math.max( 16, is.available() ) );
char[] tmp = new char[ 4096 ];
try {
InputStreamReader reader = new InputStreamReader( is, ecoding );
for( int cnt; ( cnt = reader.read( tmp ) ) > 0; )
sb.append( tmp, 0, cnt );
} finally {
is.close();
}
return sb.toString();
}*/
