Question

我正在尝试使用Broadcast Listener检测来电。由于当有人拨打电话时我的应用中收到一个错误，我的应用仍会播放该歌曲。所以我想在来电期间暂停一首歌。但我没有收到任何回复。

这是完整的code所以你们都可以理解我在哪里弄乱。

的AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>

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

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">

    <activity android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

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

IncomingCall.java

package com.example.suraj.freewee;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.util.Log;

public class IncomingCall extends BroadcastReceiver {

private String LOG_TAG = getClass().getSimpleName();
TelephonyManager telephonyManager;
Context context;

@Override
public void onReceive(Context context, Intent intent) {
    try {
        this.context = context;
        telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
        MyPhoneStateListener phoneListener = new MyPhoneStateListener();
        telephonyManager.listen(phoneListener, PhoneStateListener.LISTEN_CALL_STATE);

        Log.e(LOG_TAG, "inside on receive");
    } catch (Exception e) {
        e.printStackTrace();
        Log.e(LOG_TAG, e.toString());
    }


}

private class MyPhoneStateListener extends PhoneStateListener {
    @Override
    public void onCallStateChanged(int state, String incomingNumber) {
        Log.e(LOG_TAG, "Number : " + incomingNumber);
        try {
            switch (state) {
                case TelephonyManager.CALL_STATE_RINGING: {
                    //PAUSE
                    SongsAdapter.player.pause();
                    Log.e(getClass().getSimpleName(), "call ringing");
                    break;
                }
                case TelephonyManager.CALL_STATE_OFFHOOK: {
                    SongsAdapter.player.pause();
                    Log.e(getClass().getSimpleName(), "call offhook");
                    break;
                }
                case TelephonyManager.CALL_STATE_IDLE: {
                    //PLAY
                    SongsAdapter.player.start();
                    Log.e(getClass().getSimpleName(), "call idle");
                    break;
                }
                default: {
                }
            }
        } catch (Exception ex) {
            Log.e(getClass().getSimpleName(), "Error: " + ex.toString());
        }
    }
}

}

在logcat中，不显示任何日志错误那么为什么这会给我这样的行为呢。提前谢谢

Answer 1

您正在onReceive内注册听众。那是毫无意义的。如 Android文档声明：

BroadcastReceiver对象仅在对onReceive（Context，Intent）的调用期间有效。一旦您的代码从此函数返回，系统会认为该对象已完成且不再有效。

从EXTRA_STATE Intent onReceive获取switch并在Log执行onReceive就足够了。

如果您仍然没有记录任何内容，请将其修改为最小的情况 - 仅在// RxJava Observable Observable.OnSubscribe<Object> onSubscribe = subscriber -> { try { // Do the query or long task... subscriber.onNext(object); subscriber.onCompleted(); } catch (Exception e) { subscriber.onError(e); } }; // RxJava Observer Subscriber<Object> subscriber = new Subscriber<Object>() { @Override public void onCompleted() { // Handle the completion } @Override public void onError(Throwable e) { // Handle the error } @Override public void onNext(Object result) { // Handle the result } }; Observable.create(onSubscribe) .subscribeOn(Schedulers.newThread()) .observeOn(AndroidSchedulers.mainThread()) .subscribe(subscriber);内留下rpt.SetParameterValue("@param_name", the_value)语句。它有用吗？ AFAIK有两种情况，即应用程序无法接收广播 - 如果它从未启动或是强制停止。

Answer 2

尝试编辑onReceive（），如下所示

public void onReceive(Context context, Intent intent)    
{
    TelephonyManager phoneManager =
        (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);

    if(phoneManager.getCallState() == TelephonyManager.CALL_STATE_RINGING) 
    {
        string fromNumber = intent.getStringExtra(TelephonyManager.EXTRA_INCOMING_NUMBER);
        Log.i(TAG, "u have a call from a number " + fromNumber);
    }
}

现在拨打你的号码并查看日志中的号码

电话状态监听器在android中使用广播接收器无法正常工作

2 个答案: