我有个问题。:) 它很小,但如果有人能提供帮助,我们将不胜感激!
问题是我想要获取 android 设备的电池信息,但它返回 null。我已经做了所有正确的事情,但无法找出错误。:(
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.resources_battery);
BroadcastReceiver batteryData = new BroadcastReceiver() {
String tech,temp;
int level;
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
tech = intent.getStringExtra(BatteryManager.EXTRA_TECHNOLOGY);
level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL,-1);
temp = intent.getStringExtra(BatteryManager.EXTRA_TEMPERATURE);
TextView technology = (TextView) findViewById(R.id.Appres_BatType);
technology.setText("Current Technology : " + tech);
TextView Tempreture = (TextView) findViewById(R.id.Appres_Battemp);
Tempreture.setText("Current Battery Tempreature : " +temp);
}
};
IntentFilter filter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
registerReceiver(batteryData, filter);
}
上面是我为获取温度而编写的代码,但它返回 null!请帮忙!
我将代码更改为此 bt 仍然返回零!
temp = intent.getIntExtra(BatteryManager.EXTRA_TEMPERATURE, -1);