git.gag.com Git - fw/altos/blob - altosdroid/src/org/altusmetrum/AltosDroid/TelemetryLogger.java

   1 package org.altusmetrum.AltosDroid;
   2
   3 import org.altusmetrum.altoslib_5.*;
   4
   5 import android.content.BroadcastReceiver;
   6 import android.content.Context;
   7 import android.content.Intent;
   8 import android.content.IntentFilter;
   9 import android.os.Environment;
  10 import android.util.Log;
  11
  12 public class TelemetryLogger {
  13         private static final String TAG = "TelemetryLogger";
  14         private static final boolean D = true;
  15
  16         private Context   context = null;
  17         private AltosLink link    = null;
  18         private AltosLog  logger  = null;
  19
  20         private BroadcastReceiver mExternalStorageReceiver;
  21
  22         public TelemetryLogger(Context in_context, AltosLink in_link) {
  23                 context = in_context;
  24                 link    = in_link;
  25
  26                 startWatchingExternalStorage();
  27         }
  28
  29         public void stop() {
  30                 stopWatchingExternalStorage();
  31                 close();
  32         }
  33
  34         private void close() {
  35                 if (logger != null) {
  36                         if (D) Log.d(TAG, "Shutting down Telemetry Logging");
  37                         logger.close();
  38                         logger = null;
  39                 }
  40         }
  41
  42         void handleExternalStorageState() {
  43                 String state = Environment.getExternalStorageState();
  44                 if (Environment.MEDIA_MOUNTED.equals(state)) {
  45                         if (logger == null) {
  46                                 if (D) Log.d(TAG, "Starting up Telemetry Logging");
  47                                 logger = new AltosLog(link);
  48                         }
  49                 } else {
  50                         if (D) Log.d(TAG, "External Storage not present - stopping");
  51                         close();
  52                 }
  53         }
  54
  55         void startWatchingExternalStorage() {
  56                 mExternalStorageReceiver = new BroadcastReceiver() {
  57                         @Override
  58                         public void onReceive(Context context, Intent intent) {
  59                                 handleExternalStorageState();
  60                         }
  61                 };
  62                 IntentFilter filter = new IntentFilter();
  63                 filter.addAction(Intent.ACTION_MEDIA_MOUNTED);
  64                 filter.addAction(Intent.ACTION_MEDIA_REMOVED);
  65                 context.registerReceiver(mExternalStorageReceiver, filter);
  66                 handleExternalStorageState();
  67         }
  68
  69         void stopWatchingExternalStorage() {
  70                 context.unregisterReceiver(mExternalStorageReceiver);
  71         }
  72
  73 }