Android：檢索存儲在sharedpreference中的數據，即使在關閉應用程序後

我在我的應用程序中有複選框，並使用共享首選項方法來保存它們，我最終將數據存儲在共享首選項中，並且能夠檢索它，但只有當應用程序不是完全關閉。Android：檢索存儲在sharedpreference中的數據，即使在關閉應用程序後

這裏是我的代碼保存我的數據

save.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View arg0) { 

      prefs = getApplicationContext().getSharedPreferences("preferencename", MODE_PRIVATE); 
      editor = prefs.edit(); 
      editor.clear(); 
      editor.commit(); 

      saveArray(list, "list", getApplicationContext()); 
      Toast.makeText(getApplicationContext(), "Save"+" "+cou, Toast.LENGTH_SHORT).show(); 
      cou=0; 

     } 
    }); 

}

方法來保存它

public boolean saveArray(List<Model> list2, String arrayName, Context mContext) { 



prefs = getApplicationContext().getSharedPreferences("preferencename", MODE_PRIVATE); 
editor = prefs.edit(); 
     for(int i=0;i<list2.size();i++){ 
      if(list2.get(i).isSelected()){ 

      editor.putString(arrayName +"."+i, "true"); 
      cou++; 
      }else{ editor.putString(arrayName +"."+i, "false");} 

     } 
     return editor.commit(); 
    }

數據檢索

try 
    { 
      adapter = new CustomAdapter(this,loadArray("list", getApplicationContext())); 

    } 
    catch(Exception e){ 

     adapter = new CustomAdapter(this,getModel()); 
    }

方法檢索

public List<Model> loadArray(String arrayName, Context mContext) { 
    prefs= getSharedPreferences("preferencename", MODE_PRIVATE); 
     String mp3Directory = "/Music"; 
     String directoryPath= Environment.getExternalStorageDirectory().getAbsolutePath()+mp3Directory; 
     lst = getMP3Files(directoryPath); 

    //print in LogCat the list of .mp3: 

     for(int i=0;i<lst.size();i++){ 
      list.add(new Model(lst.get(i).getName())); 

      if(prefs.getString(arrayName+"." +i, "")=="true") 
      { 
        list.get(i).setSelected(true); 
      } 
       else 
        list.get(i).setSelected(false); 
      } 

     return list; 

    } 
}

來源

2014-12-31 ajuju

使用services..call從那裏，當你達到關閉 – Elltz

這裏我該怎麼把這個服務，而且可以請你給我一些關於它的主意，就像一個示例程序@Elltz – ajuju

它有幫助嗎？它解決了你的問題嗎？ – Elltz

創建延伸服務類，我不知道你的喜好，但這裏有一些TUTS讓自己周圍的服務one，two，three，four

public class MyBackgroundjob extends Service { 
    @Override 
    public int onStartCommand(Intent intent, int flags, int startId) { 
    // call it here.. 
    loadArray(String arrayName, Context mContext); // 
    // you can create a singleton class that will hold your data, which will be global 
    // to your application, and yea, now you have your stuff do your stuff 

    return START_STICKY; 
    } 
    // copy your retrieving method and paste the void here.. starting from this line 

List<Model> loadArray(String arrayName, Context mContext) { 
prefs= getSharedPreferences("preferencename", MODE_PRIVATE); 
    String mp3Directory = "/Music"; 
    String directoryPath= Environment.getExternalStorageDirectory().getAbsolutePath()+mp3Directory; 
    lst = getMP3Files(directoryPath); 

//print in LogCat the list of .mp3: 

    for(int i=0;i<lst.size();i++){ 
     list.add(new Model(lst.get(i).getName())); 

     if(prefs.getString(arrayName+"." +i, "")=="true") 
     { 
       list.get(i).setSelected(true); 
     } 
      else 
       list.get(i).setSelected(false); 
     } 

    return list; 

    } 
} 
}

順便說一句，您啓動服務（MyBackgroundJob類）從你的活動這樣Intent i = new Intent(activity, MyBackgroundJob.class); context.startService(i);

您signleton類可能是

public class Mysingle extends Application{ 
    // then you create your "list" here okay make it static 
    static List<type> list; // and you call it by = Mysingle.list 

}

是啊，所以玩其餘..你甚至可以在服務中運行你的整個應用程序進程，並綁定到您的活動和更新用戶，利用內臟。 AYT ..

希望我理智和清醒..

來源

2014-12-31 13:59:43 Elltz

Android：檢索存儲在sharedpreference中的數據，即使在關閉應用程序後

回答

相關問題