How to get battery level using broadcast reciever

Question

In my App I want to check battery level if it is less than a specific value I want my App to say that level using text to speech and services. I have done it using broadcastreciever but it works only when App is running on screen and do not work when it is running in background...

public class Batteryreciever extends BroadcastReceiver {
    int level;
    @Override
    public void onReceive(Context context, Intent intent) {
if(intent.getAction().equals("android.intent.action.BATTERY_CHANGED")) { 
            level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, 0);
            if (level < 10) {
                String batterylevel = "critical battery ";
        Intent i = new Intent(context, MyService.class);
            i.putExtra("KEY1", batterylevel);
                i.putExtra("type", "battery");
            context.startService(i);
            }       
            }
    } }

Post your code please. If you are creating the broadcast receiver in the activity it might not work when app is in background, however if you have separate class for the receiver, and then register it in manifest, receiver will be called each time the action is broadcast. See this [link](http://developer.android.com/reference/android/content/BroadcastReceiver.html#onReceive(android.content.Context, android.content.Intent)) — Lexandar, Feb 28 '14 at 10:45
I have added my code if you may please help me. @AleksandarApostolov — user2409402, Mar 03 '14 at 09:50

score 1 · Answer 1 · answered Feb 28 '14 at 10:45

using sticky Broadcast receiver you can get Battery level and after that as you told battery level goes down to certain level then perform task what ever you want.

Link and See This

it will help and you get more information

score 0 · Answer 2 · edited Apr 19 '23 at 13:06

0

take a look at this, it will get you the battery level you need so you can start your service. Just use BatteryManager.EXTRA_LEVEL as the key to get the level from the intent

https://developer.android.com/training/monitoring-device-state/battery-monitoring.html

edited Apr 19 '23 at 13:06

Suraj Rao

29,388
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answered Feb 28 '14 at 10:42

Thanh Le

763
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score 0 · Answer 3 · answered Feb 28 '14 at 10:43

use this method :

public static float getBatteryLevel(Context cntx) {
        Intent batteryIntent = cntx.registerReceiver(null, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
        int level = batteryIntent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
        int scale = batteryIntent.getIntExtra(BatteryManager.EXTRA_SCALE, -1);

        // Error checking that probably isn't needed but I added just in case.
        if(level == -1 || scale == -1) {
            return 50.0f;
        }

        return ((float)level / (float)scale) * 100.0f; 
    }

score 0 · Accepted Answer · edited Apr 19 '23 at 13:05

0

try this link to get battery information.

public class Main extends Activity {
  private TextView batteryTxt;
  private BroadcastReceiver mBatInfoReceiver = new BroadcastReceiver(){
    @Override
    public void onReceive(Context ctxt, Intent intent) {
      int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, 0);
      batteryTxt.setText(String.valueOf(level) + "%");
    }
  };

  @Override
  public void onCreate(Bundle b) {
    super.onCreate(b);
    setContentView(R.layout.main);
    contentTxt = (TextView) this.findViewById(R.id.batteryTxt);
    this.registerReceiver(this.mBatInfoReceiver, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
  }
}

edited Apr 19 '23 at 13:05

Suraj Rao

29,388
11
94
103

answered Feb 28 '14 at 12:08

Anjali Tripathi

1,477
9
28

This works only when App is running when back button is pressed it does not work, as i want to start service even if app is running in background,, – user2409402 Feb 28 '14 at 12:30
then use this link http://www.vogella.com/tutorials/AndroidBroadcastReceiver/article.html – Anjali Tripathi Feb 28 '14 at 12:43

score 0 · Answer 5 · edited May 23 '17 at 12:20

0

Battery broadcast receiver declared in manifest file does not work? The answer to my question is here, actually in manifest you can not register broadcast receiver for battery change ..

edited May 23 '17 at 12:20

Community

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1

answered Mar 03 '14 at 11:31

user2409402

181
1
8

How to get battery level using broadcast reciever

5 Answers5