mashable: HootSuite Rolls Out Android Apps and iPhone App Upgrade – http://bit.ly/cRHqXW

It’s a exercise of Android App to detect battery level. A BroadcastReceiver, myBatteryReceiver, is implemented and registered to receive ACTION_BATTERY_CHANGED , and retrieve “level” via getIntExtra() method. main.xml AndroidBattery.java package com.exercise.AndroidBattery; import android.app.Activity; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.os.Bundle; import android.widget.TextView; public class AndroidBattery extends Activity { private TextView batteryLevel; /** Called when the activity is first created.