碎片活动中的Android电池统计

Question

所有关于该主题的教程似乎都假设您正在使用一个基本活动来检索电池信息。我正试图从碎片活动中获取信息。我发现这就是如何在一项活动中获得我想要的东西。

public class Main extends Activity {
private TextView batteryTxt;
private BroadcastReceiver mBatInfoReceiver = new BroadcastReceiver(){
@Override
public void onReceive(Context ctxt, Intent intent) {
  int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, 0);
  batteryTxt.setText(String.valueOf(level) + "%");
}
};
@Override
public void onCreate(Bundle b) {
super.onCreate(b);
setContentView(R.layout.main);
batteryTxt = (TextView) this.findViewById(R.id.batteryTxt);
this.registerReceiver(this.mBatInfoReceiver, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
}
}

然而，我无法弄清楚需要进行哪些更改才能适应片段活动，因为这似乎是一个略有不同的过程。

public class HomeFragment extends Fragment {
public HomeFragment(){}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_home, container, false);
    return rootView;
}
}

Answer 1

public class HomeFragment extends Fragment {
private TextView batteryTxt;
private BroadcastReceiver mBatInfoReceiver = new BroadcastReceiver(){
@Override
public void onReceive(Context ctxt, Intent intent) {
  int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, 0);
  batteryTxt.setText(String.valueOf(level) + "%");
}
};
public HomeFragment(){}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_home, container, false);
    batteryTxt = (TextView) rootView.findViewById(R.id.batteryTxt);
    getActivity().registerReceiver(this.mBatInfoReceiver, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
    return rootView;
}
}

Answer 2

设法获得了一个基本的工作示例。

public class HomeFragment extends Fragment {
private TextView batteryTxt;
int health = 0;

public HomeFragment(){}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_home, container, false);
    return rootView;
}
@Override
public void onResume() {
    super.onResume();
    batteryTxt=(TextView)getActivity().findViewById(R.id.batteryTxt);
    setare();
}
public void setare(){
    batteryTxt.setText("Health: " + health + "%");

}
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    getActivity().registerReceiver(this.batteryInfoReceiver, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
}
private BroadcastReceiver batteryInfoReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        health= intent.getIntExtra(BatteryManager.EXTRA_HEALTH,0);

    }
};
}