读取 android 设备的电池信息

jopen 10年前

读取 android 设备的电池信息：

通过创建BroadcastReceiver来侦测系统中有关电池Intent(ACTION_BATTERY_CHANGED)的变化，一旦有接收到相关事件，将会读取当前电量情况，并通过TextViews显示在当前屏幕。
    public class Main extends Activity {                   private TextView contentTxt;           private BroadcastReceiver mBatInfoReceiver = newBroadcastReceiver(){                        @Override              public void onReceive(Context arg0, Intent intent) {                // TODO Auto-generated method stub                int level = intent.getIntExtra("level", 0);                contentTxt.setText(String.valueOf(level) + "%");              }           };                    @Override           public void onCreate(Bundle) {              super.onCreate(icicle);              setContentView(R.layout.main);              contentTxt = (TextView) this.findViewById(R.id.monospaceTxt);              this.registerReceiver(this.mBatInfoReceiver,                 new IntentFilter(Intent.ACTION_BATTERY_CHANGED));           }                }