Android Open Source - volume-widget Volume Widget Provider

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Back to project page volume-widget.

License

The source code is released under:

Apache License

Java Source Code

package ca.xvx.volume;
//from   w  ww. j ava 2s .  co  m
import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.media.AudioManager;
import android.os.SystemClock;
import android.util.Log;
import android.view.View;
import android.widget.RemoteViews;

import java.lang.reflect.Field;

import java.util.HashMap;
import java.util.Map;

public class VolumeWidgetProvider extends AppWidgetProvider {
  // log tag
  private static final String TAG = "VolumeWidgetProvider";

  private final Map<Integer, Integer> _streams = new HashMap<Integer, Integer>();
  private static final Map<Integer, Integer> _streamNames = new HashMap<Integer, Integer>();

  @Override
  public void onReceive(Context context, Intent intent) {
    super.onReceive(context, intent);

    if(_streamNames.isEmpty()) {
      _streamNames.put(AudioManager.STREAM_RING, R.string.ring_volume_title);
      _streamNames.put(AudioManager.STREAM_MUSIC, R.string.media_volume_title);
      _streamNames.put(AudioManager.STREAM_ALARM, R.string.alarm_volume_title);
      _streamNames.put(AudioManager.STREAM_NOTIFICATION, R.string.notification_volume_title);
    }

    final AppWidgetManager awm = AppWidgetManager.getInstance(context);
    final ComponentName nm = new ComponentName(context, VolumeWidgetProvider.class);
    final AudioManager am = (AudioManager)context.getSystemService(Context.AUDIO_SERVICE);
    final String action = intent.getAction();
    final int sender = intent.getIntExtra(context.getString(R.string.AWI_EXTRA), -1);
    final int stream = intent.getIntExtra(context.getString(R.string.STREAM_EXTRA), -1);
    final int newVol = intent.getIntExtra(context.getString(R.string.VOL_EXTRA), -1);
    Log.d(TAG, "Received intent " + action + " from " + String.valueOf(sender));

    if(action.equals(context.getString(R.string.VOLUME_CHANGED))) {
      onUpdate(context, awm, awm.getAppWidgetIds(nm));
    } else if(action.equals(context.getString(R.string.VOLUME_DOWN))) {
      am.adjustStreamVolume(stream, AudioManager.ADJUST_LOWER, 0);
    } else if(action.equals(context.getString(R.string.VOLUME_UP))) {
      am.adjustStreamVolume(stream, AudioManager.ADJUST_RAISE, 0);
    } else if(action.equals(context.getString(R.string.VOLUME_SET))) {
      Log.d(TAG, "New volume for stream " + String.valueOf(stream) + " is " + String.valueOf(newVol));
      am.setStreamVolume(stream, newVol, 0);
    }
  }

  private int getStream(Context context, int awi) {
    int stream;
    if(!_streams.containsKey(awi)) {
      final String PREFS_NAME = context.getString(R.string.prefs_base_name) + String.valueOf(awi);
      final SharedPreferences prefs = context.getSharedPreferences(PREFS_NAME, Context.MODE_WORLD_READABLE);
      stream = prefs.getInt(context.getString(R.string.STREAM_PREF), -1);
      if(stream >= 0) {
        _streams.put(awi, stream);
      }
    } else {
      stream = _streams.get(awi);
    }
    
    Log.d(TAG, "App widget ID = " + String.valueOf(awi) + ", stream = " + String.valueOf(stream));
    return stream;
  }

  @Override
  public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
    Log.d(TAG, "Volume widget updating");

    int stream;
    for(int awi : appWidgetIds) {
      stream = getStream(context, awi);
      updateWidget(context, appWidgetManager, awi, stream);
    }
  }

  @Override
  public void onDeleted(Context context, int[] appWidgetIds) {
    super.onDeleted(context, appWidgetIds);

    for(int awi : appWidgetIds) {
      _streams.remove(awi);
    }
  }

  static void updateWidget(Context context, AppWidgetManager appWidgetManager,
               int appWidgetId, int stream) {
    Log.d(TAG, "updateWidget appWidgetId=" + appWidgetId + " stream=" + String.valueOf(stream));

    if(stream < 0) {
      return;
    }

    AudioManager am = (AudioManager)context.getSystemService(Context.AUDIO_SERVICE);
    String name;

    try {
      name = context.getString(_streamNames.get(stream));
    } catch(Exception e) {
      name = "";
    }
    
    int volume = am.getStreamVolume(stream);
    int max = am.getStreamMaxVolume(stream);
    Log.d(TAG, "Volume is " + String.valueOf(volume) + " / " + String.valueOf(max));
    
    RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget_layout);
    views.setTextViewText(R.id.name, name);
    views.setProgressBar(R.id.volume_bar, max, volume, false);

    Intent downIntent = new Intent(context.getString(R.string.VOLUME_DOWN));
    downIntent.putExtra(context.getString(R.string.STREAM_EXTRA), stream);
    downIntent.putExtra(context.getString(R.string.AWI_EXTRA), appWidgetId);
    views.setOnClickPendingIntent(R.id.down_button,
                    PendingIntent.getBroadcast(context, appWidgetId, downIntent,
                                 PendingIntent.FLAG_UPDATE_CURRENT));

    Intent upIntent = new Intent(context.getString(R.string.VOLUME_UP));
    upIntent.putExtra(context.getString(R.string.STREAM_EXTRA), stream);
    upIntent.putExtra(context.getString(R.string.AWI_EXTRA), appWidgetId);
    views.setOnClickPendingIntent(R.id.up_button,
                    PendingIntent.getBroadcast(context, appWidgetId, upIntent,
                                 PendingIntent.FLAG_UPDATE_CURRENT));

    for(int bn = 0; bn <= 15; bn += 1) {
      final String buttonName = "button_" + String.valueOf(bn);
      int id = -1;
      try {
        id = R.id.class.getField(buttonName).getInt(R.id.class);
      } catch(Exception e) {
        Log.e(TAG, "Exception getting ID");
        continue;
      }
      
      if(bn <= max) {
        final Intent setIntent = new Intent(context.getString(R.string.VOLUME_SET));
        setIntent.putExtra(context.getString(R.string.STREAM_EXTRA), stream);
        setIntent.putExtra(context.getString(R.string.AWI_EXTRA), appWidgetId);
        setIntent.putExtra(context.getString(R.string.VOL_EXTRA), bn);
        final int request = appWidgetId << 16 | bn;
        views.setOnClickPendingIntent(id,
                        PendingIntent.getBroadcast(context,
                                     request, setIntent,
                                     PendingIntent.FLAG_UPDATE_CURRENT));
      } else {
        views.setInt(id, "setVisibility", View.GONE);
      }
    }
    
    appWidgetManager.updateAppWidget(appWidgetId, views);
  }
}

Java Source Code List

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