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通过系统广播的方式监听电池电量的状态及其情况 ：
需求就是每隔15秒检查一下电池状态信息
public class MainActivity extends Activity {
/**
* 先声明一个 IntentFilter 对象
*/
private IntentFilter mIntentFilter;
private TextView textview;
private MyHandler handler = new MyHandler(this);
private class MyHandler extends Handler {
private WeakReference<Context> mWeakReference;
private String tag;
public MyHandler(Context context) {
mWeakReference = new WeakReference<Context>(context);
}
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
if (msg.what == 0) {
mIntentFilter = new IntentFilter();
mIntentFilter.addAction(Intent.ACTION_BATTERY_CHANGED);
registerReceiver(mIntentReceiver, mIntentFilter);
sendEmptyMessageDelayed(0, 15000);
}
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
handler.sendEmptyMessageDelayed(0, 15000);
}
@Override
protected void onResume() {
super.onResume();
// 注册消息处理器
}
//声明消息处理过程
private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
//要看看是不是我们要处理的消息
if (action.equals(Intent.ACTION_BATTERY_CHANGED)) {
//电池电量，数字
Log.d("Battery", "" + intent.getIntExtra("level", 0));
//电池最大容量
Log.d("Battery", "" + intent.getIntExtra("scale", 0));
//电池伏数
Log.d("Battery", "" + intent.getIntExtra("voltage", 0));
//电池温度
Log.d("Battery", "" + intent.getIntExtra("temperature", 0));
//电池状态，返回是一个数字
// BatteryManager.BATTERY_STATUS_CHARGING 表示是充电状态
// BatteryManager.BATTERY_STATUS_DISCHARGING 放电中
// BatteryManager.BATTERY_STATUS_NOT_CHARGING 未充电
// BatteryManager.BATTERY_STATUS_FULL 电池满
Log.d("Battery", "" + intent.getIntExtra("status", BatteryManager.BATTERY_STATUS_UNKNOWN));
//充电类型 BatteryManager.BATTERY_PLUGGED_AC 表示是充电器，不是这个值，表示是 USB
Log.d("Battery", "" + intent.getIntExtra("plugged", 0));
//电池健康情况，返回也是一个数字
//BatteryManager.BATTERY_HEALTH_GOOD 良好
//BatteryManager.BATTERY_HEALTH_OVERHEAT 过热
//BatteryManager.BATTERY_HEALTH_DEAD 没电
//BatteryManager.BATTERY_HEALTH_OVER_VOLTAGE 过电压
//BatteryManager.BATTERY_HEALTH_UNSPECIFIED_FAILURE 未知错误
Log.d("Battery", "" + intent.getIntExtra("health", BatteryManager.BATTERY_HEALTH_UNKNOWN));
}
}
};
@Override
protected void onDestroy() {
super.onDestroy();
// 注销广播
unregisterReceiver(mIntentReceiver);
}
}
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转播
