以编程方式获取Android电池信息

Question

我正在尝试获取电池信息，主要是电源左，电压，电流为Android N（7.1.1）设备。我试图在onCreate方法中运行以下代码。

第一种方法;

IntentFilter ifilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
        batteryStatus = this.registerReceiver(null, ifilter);
        double currentNow = BatteryManager.BATTERY_PROPERTY_CURRENT_NOW;
        double voltage = BatteryManager.BATTERY_HEALTH_OVER_VOLTAGE;
        double level = batteryStatus.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
        double scale = batteryStatus.getIntExtra(BatteryManager.EXTRA_SCALE, 

第二种方法：

 BatteryManager mBatteryManager =
                (BatteryManager)Context.getSystemService(Context.BATTERY_SERVICE);
        Long energy =
                mBatteryManager.getLongProperty(BatteryManager.BATTERY_PROPERTY_ENERGY_COUNTER);

第一种方法是给我默认值，第二种方法是给我错误：非静态方法getsystemservice（string）不能从静态上下文引用

Answer 1

你有没有试过这样的事情：

private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        // Get the battery scale
        int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE,-1);

        // get the battery level
        int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL,-1);

    }
};

在你的on create方法中：

IntentFilter iFilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);    
mContext.registerReceiver(mBroadcastReceiver,iFilter);