电池温度返回 null

Question

我有问题。 :) 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);
}

上面是我编写的用于获取 temp 的代码，但它返回 null！ 请帮忙！

我将代码更改为这个 bt 仍然返回零！

temp = intent.getIntExtra(BatteryManager.EXTRA_TEMPERATURE, -1);

Answer 1

temp = intent.getIntExtra(BatteryManager.EXTRA_TEMPERATURE, -1);

是获取温度的正确方法。

这对我有用：

protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.resources_battery);

BroadcastReceiver batteryData = new BroadcastReceiver() {
    String tech;
    int level,temp;
    @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.getIntExtra(BatteryManager.EXTRA_TEMPERATURE, -1);

        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);
}

也许您的设备不能正确报告电池温度？我的设备 (Galaxy Nexus) 报告：330（1/10 摄氏度，请参阅this 问题）。

Answer 2

您只需将 temp 更改为 int 并使用您编写的最后一行

protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.resources_battery);

    BroadcastReceiver batteryData = new BroadcastReceiver() {
    String tech;
    int level,temp;
        @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.getIntExtra(BatteryManager.EXTRA_TEMPERATURE,-1);

            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);
}