Get battery information using BatteryManager

The previous show how to Read battery status and level. Actually we can get more information of the battery by using BatteryManager, such as health, technology, temperature, voltage...

package com.example.androidbattery;

import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.BatteryManager;
import android.os.Bundle;

public class MainActivity extends ActionBarActivity {

 Button btnReadBattery;
 ImageView imageIcon;
 TextView textBatteryStatus;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        btnReadBattery = (Button)findViewById(R.id.readbattery);
        imageIcon = (ImageView)findViewById(R.id.icon);
        textBatteryStatus = (TextView)findViewById(R.id.batterystatus);
        
        btnReadBattery.setOnClickListener(new OnClickListener(){

   @Override
   public void onClick(View v) {
    textBatteryStatus.setText(readBattery());
   }});
        
    }

    private String readBattery(){
     StringBuilder sb = new StringBuilder();
     IntentFilter batteryIntentFilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
     Intent batteryIntent = registerReceiver(null, batteryIntentFilter);

     boolean  present= batteryIntent.getExtras().getBoolean(BatteryManager.EXTRA_PRESENT);
     sb.append("PRESENT: " + present + "\n");
     
     int status = batteryIntent.getIntExtra(BatteryManager.EXTRA_STATUS, -1);
     if(status == BatteryManager.BATTERY_STATUS_CHARGING){
      sb.append("BATTERY_STATUS_CHARGING\n");
     }
     if(status == BatteryManager.BATTERY_STATUS_FULL){
      sb.append("BATTERY_STATUS_FULL\n");
     }

     int plugged = batteryIntent.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);
     if(plugged == BatteryManager.BATTERY_PLUGGED_USB){
      sb.append("BATTERY_PLUGGED_USB\n");
     }
     if(plugged == BatteryManager.BATTERY_PLUGGED_AC){
      sb.append("BATTERY_PLUGGED_AC\n");
     }

     int level = batteryIntent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
     sb.append("LEVEL: " + level + "\n");
     
        int scale = batteryIntent.getIntExtra(BatteryManager.EXTRA_SCALE, -1);
        sb.append("SCALE: " + scale + "\n");
        
        int  health = batteryIntent.getIntExtra(BatteryManager.EXTRA_HEALTH,0);
        sb.append("health: " + convHealth(health) + "\n");
        
        String  technology = batteryIntent.getExtras().getString(BatteryManager.EXTRA_TECHNOLOGY);
        sb.append("TECHNOLOGY: " + technology + "\n");
        
        int  temperature = batteryIntent.getIntExtra(BatteryManager.EXTRA_TEMPERATURE,0);
        sb.append("TEMPERATURE: " + temperature + "\n");
        
        int  voltage = batteryIntent.getIntExtra(BatteryManager.EXTRA_VOLTAGE,0);
        sb.append("VOLTAGE: " + voltage + "\n");
        
        //I have no idea how to load the small icon from system resources!
        int  icon_small_resourceId = batteryIntent.getIntExtra(BatteryManager.EXTRA_ICON_SMALL,0);
        sb.append("ICON_SMALL: " + icon_small_resourceId + "\n");
        
        return sb.toString();
    }
    
    private String convHealth(int health){
     String result;
     switch(health){
     case BatteryManager.BATTERY_HEALTH_COLD:
      result = "BATTERY_HEALTH_COLD";
      break;
     case BatteryManager.BATTERY_HEALTH_DEAD:
      result = "BATTERY_HEALTH_DEAD";
      break;
     case BatteryManager.BATTERY_HEALTH_GOOD:
      result = "BATTERY_HEALTH_GOOD";
      break;
     case BatteryManager.BATTERY_HEALTH_OVERHEAT:
      result = "BATTERY_HEALTH_OVERHEAT";
      break;
     case BatteryManager.BATTERY_HEALTH_OVER_VOLTAGE:
      result = "BATTERY_HEALTH_OVER_VOLTAGE";
      break;
     case BatteryManager.BATTERY_HEALTH_UNKNOWN:
      result = "BATTERY_HEALTH_UNKNOWN";
      break;
     case BatteryManager.BATTERY_HEALTH_UNSPECIFIED_FAILURE:
      result = "BATTERY_HEALTH_UNSPECIFIED_FAILURE";
      break;
     default:
      result = "unkknown";
     }

     return result;
    }
}

Keep using the layout in the post "Read battery status and level".

Next:
- Implement BroadcastReceiver to monitor change of Charging State and Battery Level