java - 在 list 中注册Broadcastreceiver

我有以下manifest.xml：


    

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

    <receiver android:name=".PhoneStateBroadcastReceiver"
        android:permission="android.permission.READ_PHONE_STATE">
        <intent-filter>
            <action android:name="android.intent.action.PHONE_STATE" />
        </intent-filter>
    </receiver>

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

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

</application>

侦听器在主要活动运行时接收数据。但是，当主要活动被杀死时，接收器停止输出信息。

接收器是一个示例类：

public class PhoneStateBroadcastReceiver extends BroadcastReceiver {

    private static final String TAG = "PhoneReceiver";
    Context mContext;
    String incoming_number;
    private int prev_state;

    @Override
    public void onReceive(Context context, Intent intent) {
        TelephonyManager telephony = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE); //TelephonyManager object
        CustomPhoneStateListener customPhoneListener = new CustomPhoneStateListener();
        telephony.listen(customPhoneListener, PhoneStateListener.LISTEN_CALL_STATE); //Register our listener with TelephonyManager

        Bundle bundle = intent.getExtras();
        String phoneNr = bundle.getString("incoming_number");
        Log.v(TAG, phoneNr);
        Log.d( TAG, "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" );
        mContext = context;
    }

    /* Custom PhoneStateListener */
    public class CustomPhoneStateListener extends PhoneStateListener {

        private static final String TAG = "CustomStateListener";

        @Override
        public void onCallStateChanged(int state, String incomingNumber){

            if( incomingNumber != null && incomingNumber.length() > 0 )
                incoming_number = incomingNumber;

            switch(state){
                case TelephonyManager.CALL_STATE_RINGING:
                    Log.d(TAG, "CALL_STATE_RINGING");
                    prev_state=state;
                    break;

                case TelephonyManager.CALL_STATE_OFFHOOK:
                    Log.d(TAG, "CALL_STATE_OFFHOOK");
                    prev_state=state;
                    break;

                case TelephonyManager.CALL_STATE_IDLE:

                    Log.d(TAG, "CALL_STATE_IDLE==>"+incoming_number);

                    if((prev_state == TelephonyManager.CALL_STATE_OFFHOOK)){
                        prev_state=state;
                        //Answered Call which is ended
                    }
                    if((prev_state == TelephonyManager.CALL_STATE_RINGING)){
                        prev_state=state;
                        //Rejected or Missed call
                    }
                    break;
            }
        }
    }
}

据我了解的android原理，当接收者在清单中注册时，即使它的应用程序被杀死，它也应该接收数据，如果是的话，我在做什么错呢？

最佳答案

将以下内容添加到清单中的<receiver>中：

 android:enabled="true"
 android:exported="true">

此外，according to this thread似乎必须在广播接收器开始工作之前手动启动您的一项活动，即在任何广播接收器将工作之前，必须至少启动一次应用程序。

此外，在<application>标记之外声明权限。所以你应该有这样的东西：

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.android.app.myapp" >
    <uses-permission android:name="android.permission.READ_PHONE_STATE"/>
    <application ...
...
</manifest>

当然，这意味着您应该在receiver中删除​​权限参数。

关于java - 在 list 中注册Broadcastreceiver，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/37927290/