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POIssues Passing String Data Between Two Classes
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copied!<p>I need to share certain strings with my service class however when I attempt to do so I'm getting two errors stating "myWifiInfo cannot be resolved" when attempting to implement a string array using the following method (shown in the source below - and the link below):</p> <p><a href="https://stackoverflow.com/questions/5217153/passing-string-array-between-two-class-in-android-application">Passing String array between two class in android application</a></p> <p>Any suggestions? (I've been trying very hard to pass this data to a server I have running - I feel like I'm almost there - I just can't figure out why the service class can't find the strings from Main.java) </p> <p>Main.java:</p> <pre><code> Intent intent = new Intent(Main.this, Service_class.class); String[] myStrings = new String[] {"myWifiInfo.getRssi()", "myWifiInfo.getLinkSpeed()"}; intent.putExtra("strings", myStrings); startActivity(intent); </code></pre> <p>Service_class.java:</p> <pre><code> Intent intent = getIntent(); String[] myStrings = intent.getStringArrayExtra("strings"); </code></pre> <p>Main.java Full Source Code:</p> <pre><code>import java.util.Calendar; import com.parse.ParseAnalytics; import com.parse.ParseObject; import android.app.Activity; import android.app.AlarmManager; import android.app.AlertDialog; import android.app.PendingIntent; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.net.TrafficStats; import android.net.wifi.WifiInfo; import android.net.wifi.WifiManager; import android.os.Bundle; import android.os.Handler; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.Chronometer; import android.widget.TextView; public class Main extends Activity { TextView textSsid, textSpeed, textRssi; public Handler mHandler = new Handler(); public long mStartRX = 0; public long mStartTX = 0; public long txBytes; public static String TAG="TEST TAG"; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); // Start service using AlarmManager Calendar cal = Calendar.getInstance(); cal.add(Calendar.SECOND, 10); Intent intent = new Intent(Main.this, Service_class.class); String[] myStrings = new String[] {"myWifiInfo.getRssi()", "myWifiInfo.getLinkSpeed()"}; intent.putExtra("strings", myStrings); startActivity(intent); PendingIntent pintent = PendingIntent.getService(Main.this, 0, intent, 0); AlarmManager alarm = (AlarmManager) getSystemService(Context.ALARM_SERVICE); alarm.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 12 * 1000, pintent); // click listener for the button to start service Button btnStart = (Button) findViewById(R.id.button1); btnStart.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { startService(new Intent(getBaseContext(), Service_class.class)); } }); // click listener for the button to stop service Button btnStop = (Button) findViewById(R.id.button2); btnStop.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { stopService(new Intent(getBaseContext(), Service_class.class)); } }); textSsid = (TextView) findViewById(R.id.Ssid); textSpeed = (TextView) findViewById(R.id.Speed); textRssi = (TextView) findViewById(R.id.Rssi); Long.toString(mStartTX); Long.toString(mStartRX); Long.toString(txBytes); ParseAnalytics.trackAppOpened(getIntent()); mStartRX = TrafficStats.getTotalRxBytes(); mStartTX = TrafficStats.getTotalTxBytes(); if (mStartRX == TrafficStats.UNSUPPORTED || mStartTX == TrafficStats.UNSUPPORTED) { AlertDialog.Builder alert = new AlertDialog.Builder(this); alert.setTitle("Uh Oh!"); alert.setMessage("Your device does not support traffic stat monitoring."); alert.show(); } else { mHandler.postDelayed(mRunnable, 1000); }} private final Runnable mRunnable = new Runnable() { public void run() { TextView RX = (TextView)findViewById(R.id.RX); TextView TX = (TextView)findViewById(R.id.TX); long rxBytes = TrafficStats.getTotalRxBytes()- mStartRX; RX.setText(Long.toString(rxBytes)); long txBytes = TrafficStats.getTotalTxBytes()- mStartTX; TX.setText(Long.toString(txBytes)); mHandler.postDelayed(mRunnable, 1000); final Chronometer myChronometer = (Chronometer)findViewById(R.id.chronometer); myChronometer.start(); DisplayWifiState(); this.registerReceiver(this.myWifiReceiver, new IntentFilter( ConnectivityManager.CONNECTIVITY_ACTION)); } private void registerReceiver(BroadcastReceiver myWifiReceiver2, IntentFilter intentFilter) { // TODO Auto-generated method stub } private BroadcastReceiver myWifiReceiver = new BroadcastReceiver() { @Override public void onReceive(Context arg0, Intent arg1) { // TODO Auto-generated method stub NetworkInfo networkInfo = (NetworkInfo) arg1 .getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO); if (networkInfo.getType() == ConnectivityManager.TYPE_WIFI) { DisplayWifiState(); } } }; public void DisplayWifiState() { ConnectivityManager myConnManager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE); NetworkInfo myNetworkInfo = myConnManager .getNetworkInfo(ConnectivityManager.TYPE_WIFI); WifiManager myWifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE); WifiInfo myWifiInfo = myWifiManager.getConnectionInfo(); if (myNetworkInfo.isConnected()) { textSsid.setText(myWifiInfo.getSSID()); textSpeed.setText(String.valueOf(myWifiInfo.getLinkSpeed()) + " " + WifiInfo.LINK_SPEED_UNITS); textRssi.setText(String.valueOf(myWifiInfo.getRssi())); } else { textSsid.setText("---"); textSpeed.setText("---"); textRssi.setText("---"); } }; };} </code></pre> <p>Service Class Full Source Code:</p> <pre><code>import com.parse.ParseObject; import android.app.AlertDialog; import android.app.Service; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.net.TrafficStats; import android.net.wifi.WifiInfo; import android.net.wifi.WifiManager; import android.os.Bundle; import android.os.Handler; import android.os.IBinder; import android.util.Log; import android.widget.Chronometer; import android.widget.TextView; import android.widget.Toast; public class Service_class extends Service { public static String TAG="TEST TAG"; TextView textSsid, textSpeed, textRssi; public Handler mHandler = new Handler(); public long mStartRX = 0; public long mStartTX = 0; public long txBytes; public void onCreate(Bundle savedInstanceState) { super.onCreate(); Intent intent = getIntent(); String[] myStrings = intent.getStringArrayExtra("strings"); textSsid = (TextView) findViewById(R.id.Ssid); textSpeed = (TextView) findViewById(R.id.Speed); textRssi = (TextView) findViewById(R.id.Rssi); Long.toString(mStartTX); Long.toString(mStartRX); Long.toString(txBytes); mStartRX = TrafficStats.getTotalRxBytes(); mStartTX = TrafficStats.getTotalTxBytes(); if (mStartRX == TrafficStats.UNSUPPORTED || mStartTX == TrafficStats.UNSUPPORTED) { AlertDialog.Builder alert = new AlertDialog.Builder(this); alert.setTitle("Uh Oh!"); alert.setMessage("Your device does not support traffic stat monitoring."); alert.show(); } else { mHandler.postDelayed(mRunnable, 1000); } } private Intent getIntent() { // TODO Auto-generated method stub return null; } private TextView findViewById(int speed) { // TODO Auto-generated method stub return null; } private final Runnable mRunnable = new Runnable() { public void run() { TextView RX = (TextView)findViewById(R.id.RX); TextView TX = (TextView)findViewById(R.id.TX); long rxBytes = TrafficStats.getTotalRxBytes()- mStartRX; RX.setText(Long.toString(rxBytes)); long txBytes = TrafficStats.getTotalTxBytes()- mStartTX; TX.setText(Long.toString(txBytes)); mHandler.postDelayed(mRunnable, 1000); ParseObject testObject = new ParseObject("TestObject"); testObject.put("DataOut", Long.valueOf(myWifiInfo.getRssi())); testObject.put("DataIn", Long.valueOf(myWifiInfo.getLinkSpeed())); testObject.put("DataRSSI", String.valueOf(textRssi)); testObject.put("DataSpeed", String.valueOf(textSpeed)); testObject.saveInBackground(); final Chronometer myChronometer = (Chronometer)findViewById(R.id.chronometer); myChronometer.start(); DisplayWifiState(); this.registerReceiver(this.myWifiReceiver, new IntentFilter( ConnectivityManager.CONNECTIVITY_ACTION)); } private Chronometer findViewById(int chronometer) { // TODO Auto-generated method stub return null; } private void registerReceiver(BroadcastReceiver myWifiReceiver2, IntentFilter intentFilter) { // TODO Auto-generated method stub } private BroadcastReceiver myWifiReceiver = new BroadcastReceiver() { @Override public void onReceive(Context arg0, Intent arg1) { // TODO Auto-generated method stub NetworkInfo networkInfo = (NetworkInfo) arg1 .getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO); if (networkInfo.getType() == ConnectivityManager.TYPE_WIFI) { DisplayWifiState(); } } }; public void DisplayWifiState() { ConnectivityManager myConnManager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE); NetworkInfo myNetworkInfo = myConnManager .getNetworkInfo(ConnectivityManager.TYPE_WIFI); WifiManager myWifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE); WifiInfo myWifiInfo = myWifiManager.getConnectionInfo(); if (myNetworkInfo.isConnected()) { textSsid.setText(myWifiInfo.getSSID()); textSpeed.setText(String.valueOf(myWifiInfo.getLinkSpeed()) + " " + WifiInfo.LINK_SPEED_UNITS); textRssi.setText(String.valueOf(myWifiInfo.getRssi())); } else { textSsid.setText("---"); textSpeed.setText("---"); textRssi.setText("---"); }}}; @Override public IBinder onBind(Intent arg0) { return null; } @Override public int onStartCommand(Intent intent, int flags, int startId) { Toast.makeText(this, "Hello World", Toast.LENGTH_LONG).show(); // Log.d(TAG, "starting service"); ParseObject testObject = new ParseObject("TestObject"); testObject.put("DataOut", Long.valueOf(txBytes)); testObject.put("DataIn", Long.valueOf(mStartRX)); testObject.put("DataRSSI", String.valueOf(textRssi)); testObject.put("DataSpeed", String.valueOf(textSpeed)); testObject.saveInBackground(); return START_STICKY; } @Override public void onDestroy() { super.onDestroy(); Toast.makeText(this, "Service Stopped", Toast.LENGTH_LONG).show(); } @Override public void onCreate() { super.onCreate(); } } </code></pre>

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