startActivity未定义[android]

Question

这是我的代码：

public class PowerConnectionReceiver extends BroadcastReceiver {

    public void onReceive(Context context, Intent intent) {

        Bundle extras = intent.getExtras();

        int status = intent.getIntExtra(BatteryManager.EXTRA_STATUS, -1);
        boolean isCharging = status == BatteryManager.BATTERY_STATUS_CHARGING || status == BatteryManager.BATTERY_STATUS_FULL;

        int chargePlug = intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);

        intent = new Intent (context, MainActivity.class);
        intent.putExtra("Charging", isCharging);
        startActivity(intent);
    }
}

我认为它应该可以正常工作，但我在startActivity()收到错误。它看起来像是未定的。有人知道这有什么问题吗？

Answer 1

BroadcastReceiver未展开Context，因此它没有方法startActivity。您应该使用传递给onReceive的上下文：

context.startActivity(intent);