傳入呼叫的​​廣播接收器不工作？

Question

我正嘗試在接到來電時顯示吐司。但我沒有得到任何顯示。我在清單文件中提到了接收器，其中還包含電話所需的權限。 以下是我用過的代碼。

// inside IncomingCall broadcastreceiver 
package com.example.shailesh.callbroadcastreceiver; 

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

public class IncomingCall extends BroadcastReceiver { 

@Override 
public void onReceive(Context context, Intent intent) { 

    if (intent.getStringExtra(TelephonyManager.EXTRA_STATE).equals(TelephonyManager.EXTRA_STATE_RINGING)) { 
     // This code will execute when the phone has an incoming call 

     // get the phone number 
     String incomingNumber = intent.getStringExtra(TelephonyManager.EXTRA_INCOMING_NUMBER); 
     Toast.makeText(context, "Call from:" +incomingNumber, Toast.LENGTH_LONG).show(); 

    } else if (intent.getStringExtra(TelephonyManager.EXTRA_STATE).equals(
      TelephonyManager.EXTRA_STATE_IDLE) 
      || intent.getStringExtra(TelephonyManager.EXTRA_STATE).equals(
      TelephonyManager.EXTRA_STATE_OFFHOOK)) { 
     // This code will execute when the call is disconnected 
     Toast.makeText(context, "Detected call hangup event", Toast.LENGTH_LONG).show(); 

    } 

    } 
} 

，我已經在menifest文件中指定如下：

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

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


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

我有別的什麼，以獲得對來電吐司顯示，包括接收。 我也包括下面我MainActivity

import android.content.Intent; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 

public class MainActivity extends AppCompatActivity { 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    Intent i = new Intent(getApplicationContext(),IncomingCall.class); 
    startService(i); 
} 
} 

Answer 1

代碼類IncomingCall服務？如果沒有，那麼你爲什麼要開始服務的意圖。