如何在android中調用結束後開始一個活動？

Question

我想在收到呼叫結束後發送短信，我接到一個電話，我想該呼叫後自動向他/她的消息，我無法啓動的活動時，我的程度我的同班同學PhoneStateListener，請回復我

Answer 1

你需要我爲此提供服務/廣播接收器。它會收到通話結束的系統通知。所以一旦你得到它，你需要處理該通知&。然後，您可以在收到通知時開始發送消息。

組件需要的：

1. 服務

2. 廣播接收器

Answer 2

您需要實現broadcastreceiver

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

你應該創建一個BroadcastReceiver：更多在這裏

package com.mobisys.android.salesbooster; 

import com.mobisys.android.salesbooster.database.HelperDatabase; 

import android.content.BroadcastReceiver; 
import android.content.Context; 
import android.content.Intent; 
import android.content.SharedPreferences; 
import android.database.Cursor; 
import android.net.Uri; 
import android.os.Bundle; 
import android.preference.PreferenceManager; 
import android.provider.ContactsContract.PhoneLookup; 
import android.telephony.PhoneStateListener; 
import android.telephony.TelephonyManager; 
import android.util.Log; 

public class PhoneStateBroadcastReceiver extends BroadcastReceiver { 

    private static final String TAG = "PhoneStateBroadcastReceiver"; 
    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: "+phoneNr); 
     mContext = context; 
    } 

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

     private static final String TAG = "CustomPhoneStateListener"; 

     @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; 
      } 
     } 
    } 
} 

閱讀，資料來源：http://mobisys.in/blog/2011/09/is-your-call-ended-on-android-phone/