title: How to test battery charging speed?
body: <p>How can I detect battery <strong>charging speed</strong> in android device?
  I can detect battery status using below code. but not charging speed.</p>
  
  <pre><code>IntentFilter filter = new IntentFilter();
  filter.addAction(Intent.ACTION_BATTERY_CHANGED);
  BatteryChangeReceiver receiver = new BatteryChangeReceiver(subscriber);
  registerReceiver(receiver, filter);
  
  
  public class BatteryChangeReceiver extends BroadcastReceiver {
  
      @Override public void onReceive(Context context, Intent intent) {
                // here I get all battery status.
      }
    }
  </code></pre>
  
  <p>I also refer <a href="https://developer.android.com/training/monitoring-device-state/battery-monitoring.html" rel="nofollow noreferrer">this</a>,<a href="https://stackoverflow.com/questions/2439619/getting-the-battery-current-values-for-the-android-phone">this</a> and <a href="https://github.com/rmanor/currentwidget" rel="nofollow noreferrer">this</a> but cant find the way to check charging speed.</p>
  
  <p>There is an app (<a href="https://play.google.com/store/apps/details?id=com.gombosdev.ampere" rel="nofollow noreferrer">Ampere</a>) that displaying charging speed. 
  <a href="https://i.stack.imgur.com/DQ7kq.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/DQ7kq.png" alt=""></a>
  <a href="https://i.stack.imgur.com/0PuJT.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/0PuJT.png" alt="enter image description here"></a>
  <a href="https://i.stack.imgur.com/lu0r8.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/lu0r8.png" alt="enter image description here"></a>
  How can I achieve this?</p>
  
  <p>Thanks in advance.</p>