BroadcastReceiver 和 Activity 之间的通信 - android [英] Communication between BroadcastReceiver and Activity - android

问题描述

我的应用程序中有一个广播接收器，每次用户接到来电时都会触发它.现在，当它发生时，我需要广播接收器在特定活动中调用特定方法.现在，我尝试将这个方法设为静态并因此可用，但有些事情告诉我这是一个非常糟糕的主意.

I have a broadcast receiver in my app which is fired every time the user gets an incoming call. Now, when it happens, I need the broadcast receiver to invoke a specific method in a specific activity. Now, I tried to make this method static and therefore available, but something tells me it is a very bad idea.

因此，我尝试在我的 Activity 中实例化广播接收器，而不在我的清单中声明它，但问题是 - 当应用程序关闭时，该 Activity 不存在，因此我无法调用我的方法.

Accordingly, I tried to instantiate the broadcast receiver inside my activity without declaring it in my manifest but the problem is - when the app is off, the activity is not exist and therefore I can't invoke my method.

所以我的问题是 - 如何在广播接收器启动时调用此方法，而不使其成为公共静态"?

So my question is - How can I invoke this method when the broadcast receiver is fired up, without making it "public static"?

这是我的活动代码(我已经删除了不相关的部分)

Here is my activity code(I have deleted the irrelevant parts)

package com.silverfix.ringo.activities;

import com.silverfix.ringo.R;
import com.silverfix.ringo.activities.fragments.DataManagerFragment;

import android.app.ActionBar;
import android.app.Activity;
import android.app.FragmentTransaction;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;

public class RingtonesActivity extends Activity{

    private DataManagerFragment dataManagerFragment;
    private IntentFilter filter;
    private BroadcastReceiver phoneCall;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_ringtones);
        ActionBar ab = getActionBar();
        ab.setDisplayShowTitleEnabled(false);
        ab.setDisplayHomeAsUpEnabled(true);
        dataManagerFragment = new DataManagerFragment();
        FragmentTransaction ft = getFragmentManager().beginTransaction();
        ft.add(dataManagerFragment, "DataManagerFragment");
        ft.commit();
        filter = new IntentFilter();
        filter.addAction("android.intent.action.PHONE_STATE");
        phoneCall = new BroadcastReceiver() {

            @Override
            public void onReceive(Context context, Intent intent) {
                dataManagerFragment.act();
            }
        };
        registerReceiver(phoneCall, filter);
    }
}

推荐答案

你可以使用观察者，比如

You can use observers , like

public class MyReceiver extends BroadcastReceiver {
    public MyReceiver() {
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        ObservableObject.getInstance().updateValue(intent);
    }
}

<小时>

public class MainActivity extends Activity implements Observer {
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ObservableObject.getInstance().addObserver(this);
    }

    @Override
    public void update(Observable observable, Object data) {            
        Toast.makeText(this, String.valueOf("activity observer " + data), Toast.LENGTH_SHORT).show();
    }
}

<小时>

public class ObservableObject extends Observable {
    private static ObservableObject instance = new ObservableObject();

    public static ObservableObject getInstance() {
        return instance;
    }

    private ObservableObject() {
    }

    public void updateValue(Object data) {
        synchronized (this) {
            setChanged();
            notifyObservers(data);
        }
    }
}

接收器可以通过清单使用.ObservableObject - 必须是单例.

Receiver can be used via manifest. ObservableObject - must be singleton.

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