如何检测来电与广播接收器的帮助？ [英] How to detect incoming call with the help of Broadcast Receiver?

问题描述

我想认识通广播接收来电。我不能这样做！逸岸，我无法'触发'广播！

下面是我的code：

  activate.setOnClickListener（新OnClickListener（）
        {

            @覆盖
            公共无效的onClick（视图v）
            {
                Toast.makeText（getApplicationContext（），点击，1）.show（）;
                最后弦乐BROADCAST_ACTION_NAME =.BroadcastMM;
                意向意图=新的意图（）;
                intent.setAction（BROADCAST_ACTION_NAME）;
                sendBroadcast（意向）;


            }
            }
 

我不知道，如果这sendBroadcast是以往任何时候都触发！在我的广播接收机文件：

 公共无效的onReceive（上下文的背景下，意图意图）
    {
        如果（intent.getAction（）==android.intent.action.PHONE_STATE）{
        Toast.makeText（C，广播被解雇了！，1）.show（）;}
        捆绑额外= intent.getExtras（）;
        字符串状态= extras.getString（TelephonyManager.EXTRA_STATE）;
        如果（state.equals（TelephonyManager.EXTRA_STATE_RINGING））{
            Toast.makeText（上下文中，振铃，1）.show（）;
        }
}
 

我的清单文件：

 ＆LT;接收机器人：名称=。BroadcastMM＆GT;
            ＆LT;意向滤光器＆gt;
                ＆lt;作用机器人：名称=android.intent.action.PHONE_STATE＆GT;
                ＆LT; /作用＆gt;
            ＆所述; /意图滤光器＆gt;
        ＆LT; /接收器＆GT;

 ＆LT;使用-权限的Andr​​oid：名称=android.permission.READ_PHONE_STATE/＆GT;
 

有一些逻辑，我失踪？我很新至Android，所以请帮助我。

解决方案

  intent.getAction（）==android.intent.action.PHONE_STATE
 

应

  TelephonyManager.ACTION_PHONE_STATE_CHANGED.equals（intent.getAction（））;
 

因为这是你如何比较字符串（使用等于（））。

此外，C用来播放$ C $，不应该播出 - 没有BroadcastMM。的行动。试着做一个显性化，而不是：

 意向意图=新的意图（v.getContext（），BroadcastMM.class）;
 sendBroadcast（意向）;
 

这也可能是您不能播放 android.intent.action.PHONE_STATE ，所以你的如果如果你让一个明确的意图将不会被执行。

如果你真的想检查您的BroadcastReceiver是工作，把打印输出/所有IFS外敬酒。然后，一旦你建立了BroadcastReceiver的回应，做你的支票。但请记住，既然你只能听一个意向过滤器时，如果检查如果目的是 PHONE_STATE 意图是有点多余。

I'm trying to recognize incoming calls in thru a broadcast receiver. I'm UNABLE to do so! Infact, I'm unable to 'trigger' the broadcast!

Here's my code:

activate.setOnClickListener(new OnClickListener()
        {

            @Override
            public void onClick(View v)
            {
                Toast.makeText(getApplicationContext(),"Clicked",1).show();
                final String BROADCAST_ACTION_NAME = ".BroadcastMM";
                Intent intent = new Intent();  
                intent.setAction(BROADCAST_ACTION_NAME);        
                sendBroadcast(intent); 


            }                                           
            }

I dunno if this 'sendBroadcast' is ever triggered! In my Broadcast Receiver file:

public void onReceive(Context context, Intent intent)
    {
        if(intent.getAction()=="android.intent.action.PHONE_STATE"){
        Toast.makeText(c,"BroadCast fired!",1).show();}
        Bundle extras = intent.getExtras();
        String state = extras.getString(TelephonyManager.EXTRA_STATE);
        if (state.equals(TelephonyManager.EXTRA_STATE_RINGING)) {
            Toast.makeText(context, "Ringing", 1).show();
        }
}       

My manifest file:

<receiver android:name=".BroadcastMM" >
            <intent-filter>
                <action android:name="android.intent.action.PHONE_STATE" >
                </action>
            </intent-filter>
        </receiver>

 <uses-permission android:name="android.permission.READ_PHONE_STATE" />

Is there some logic I'm missing? I'm very new to Android, so please help me out.

解决方案

intent.getAction()=="android.intent.action.PHONE_STATE"

should be

TelephonyManager.ACTION_PHONE_STATE_CHANGED.equals(intent.getAction());

Since this is how you compare Strings (with equals()).

Also, the code you use to broadcast, should never broadcast - there is no ".BroadcastMM" action. Try making an explicit one instead:

 Intent intent = new Intent(v.getContext(),BroadcastMM.class);  
 sendBroadcast(intent);

It is also likely that you can't broadcast android.intent.action.PHONE_STATE, so your if won't be executed if you make an explicit Intent.

If you really want to check that your BroadcastReceiver is working, put printouts/Toasts outside all ifs. Then once you establish that the BroadcastReceiver responds, do your check. Keep in mind though, that since you only listen for one Intent-Filter, the if checking if the Intent is a PHONE_STATE Intent is a bit redundant.

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