如何閱讀的WhatsApp從通知消息羣衆演員

Question

你好我工作的一個應用程序中，我要讀WhatsApp的圖像。我可以通過以下代碼行將位圖讀取爲第一張圖片：

Bitmap btm = (Bitmap) sbn.getNotification().extras.get(Notification.EXTRA_PICTURE); 

問題是如果我收到多個圖像，我會得到空白。我該如何解決這個問題？

Answer 1

這是NotificationListenerService：

package com.etaure.callany.testwhatsappimage; 

import android.accounts.AccountManager; 
import android.app.Notification; 
import android.content.Intent; 
import android.graphics.Bitmap; 
import android.service.notification.NotificationListenerService; 
import android.service.notification.StatusBarNotification; 
import android.support.annotation.Nullable; 
import android.support.v4.content.LocalBroadcastManager; 
import android.text.TextUtils; 
import android.util.Log; 

import org.json.JSONArray; 

/** 
* Created by administrator on 03/11/2015. 
*/ 
public class MyNotificationListner extends NotificationListenerService { 

    static int i = 0; 

    @Override 
    public void onNotificationPosted(StatusBarNotification sbn) { 

     if (sbn.getPackageName().equals("com.whatsapp")) { 

      Bitmap btm = (Bitmap) sbn.getNotification().extras.get(Notification.EXTRA_PICTURE); 

     } 
    } 

    @Override 
    public void onNotificationRemoved(StatusBarNotification sbn) { 
     Log.w("Test", "NotificationRemoved"); 
    } 
} 

Answer 2

這是對你的WhatsApp圖像，並顯示解析（如果你想）在您的logcat所有的base64字符串代碼！享受

`

  if (extras.containsKey(Notification.EXTRA_PICTURE)) { 
      bmp = (Bitmap) extras.get(Notification.EXTRA_PICTURE); 
      ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(); 
      bmp.compress(Bitmap.CompressFormat.PNG, 100, byteArrayOutputStream); 
      byteArrayS = byteArrayOutputStream .toByteArray(); 
      encoded = Base64.encodeToString(byteArrayS, Base64.DEFAULT); 

      final int LOGCAT_MAX_LENGTH = 3950; 
      if (BuildConfig.DEBUG) { 
       while (encoded.length() > LOGCAT_MAX_LENGTH) { 
        int substringIndex = encoded.lastIndexOf(",", LOGCAT_MAX_LENGTH); 
        if (substringIndex == -1) 
         substringIndex = LOGCAT_MAX_LENGTH; 
        Log.d("encode", encoded.substring(0, substringIndex)); 
        encoded = encoded.substring(substringIndex).trim(); 
       } 
       Log.d("encode", encoded); 
      } 

     } 

`