这是一个代码示例，解释了如何获取电池信息。
综上所述，
ACTION_BATTERY_CHANGED动态地设置了该意图的广播接收器，因为只有通过使用显式注册它才能通过清单中声明的组件来接收它
Context.registerReceiver()。
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); batteryTxt = (TextView) this.findViewById(R.id.batteryTxt); this.registerReceiver(this.mBatInfoReceiver, new IntentFilter(Intent.ACTION_BATTERY_CHANGED)); }}
