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

   1 package org.altusmetrum.AltosDroid;
   2
   3 import org.altusmetrum.altoslib_14.*;
   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
  11 public class TelemetryLogger {
  12         private Context   context = null;
  13         private AltosLink link    = null;
  14         private AltosLog  logger  = null;
  15
  16         private BroadcastReceiver mExternalStorageReceiver;
  17
  18         public TelemetryLogger(Context in_context, AltosLink in_link) {
  19                 context = in_context;
  20                 link    = in_link;
  21
  22                 startWatchingExternalStorage();
  23         }
  24
  25         public void stop() {
  26                 stopWatchingExternalStorage();
  27                 close();
  28         }
  29
  30         private void close() {
  31                 if (logger != null) {
  32                         AltosDebug.debug("Shutting down Telemetry Logging");
  33                         logger.close();
  34                         logger = null;
  35                 }
  36         }
  37
  38         void handleExternalStorageState() {
  39                 String state = Environment.getExternalStorageState();
  40                 if (Environment.MEDIA_MOUNTED.equals(state)) {
  41                         if (logger == null) {
  42                                 AltosDebug.debug("Starting up Telemetry Logging");
  43                                 logger = new AltosLog(link);
  44                         }
  45                 } else {
  46                         AltosDebug.debug("External Storage not present - stopping");
  47                         close();
  48                 }
  49         }
  50
  51         void startWatchingExternalStorage() {
  52                 mExternalStorageReceiver = new BroadcastReceiver() {
  53                         @Override
  54                         public void onReceive(Context context, Intent intent) {
  55                                 handleExternalStorageState();
  56                         }
  57                 };
  58                 IntentFilter filter = new IntentFilter();
  59                 filter.addAction(Intent.ACTION_MEDIA_MOUNTED);
  60                 filter.addAction(Intent.ACTION_MEDIA_REMOVED);
  61                 context.registerReceiver(mExternalStorageReceiver, filter);
  62                 handleExternalStorageState();
  63         }
  64
  65         void stopWatchingExternalStorage() {
  66                 context.unregisterReceiver(mExternalStorageReceiver);
  67         }
  68
  69 }