Android Fragment - BroadcastReceiver调用 fragment 方法

Question

我有一个 BroadcastReceiver，它接收发送到 Fragment 的广播。我正在接收广播，但如何从 Fragment 本身调用方法？我基本上需要在广播到达后更新一个列表，列表和更新方法是 fragment 的一部分。

public class FragmentReceiver extends BroadcastReceiver
{
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if(action != null && action.equals("AllTasksFragmentUpdate"))
        {
            //
        }
    }
}

注册接收器:

    @Override
public void onCreate(final Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    getActivity().registerReceiver(new FragmentReceiver(), new IntentFilter("AllTasksFragmentUpdate"));
}

如何从 fragment 中调用方法？

Answer 1

您可以通过以下方式实现您的广播接收器:

import android.app.Fragment;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.content.LocalBroadcastManager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.adobe.libs.connectors.R;

public class YourFragment extends Fragment {
    @Override
    public View onCreateView(LayoutInflater inflater,
                                @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        super.onCreateView(inflater, container, savedInstanceState);
        //Start listening for refresh local file list   LocalBroadcastManager.getInstance(getActivity()).registerReceiver(mYourBroadcastReceiver,
                new IntentFilter(<YOUR INTENT FILTER>));

        return inflater.inflate(R.layout.your_fragment_layout, null, true);
    }

    @Override
    public void onDestroyView() {
        LocalBroadcastManager.getInstance(getActivity()).unregisterReceiver(mYourBroadcastReceiver);
    }

    private final BroadcastReceiver mYourBroadcastReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            // Now you can call all your fragments method here
        }
    };
}