卸载应用程序后如何删​​除数据? [英] How to Delete the data when the App is Uninstalled?

问题描述

我正在开发一个Android应用程序，该应用程序在SD卡中创建一个文件夹并存储一些图像.我要在卸载应用程序时删除该文件夹.请引导我.

I am developing an Android app which creates a folder in SD Card and stores some images. I want to remove that folder when the app is Uninstalled. Please guide me.

推荐答案

//，为此，您需要运行BroadcasrReciver并将接收器包含在androidmanifest.xml文件中

//for that you need to run the BroadcasrReciver and include the receiver in your androidmanifest.xml file

<receiver android:name="com.android.mobileasap.PackageChangeReceiver">
  <intent-filter>
                <action android:name="android.intent.action.PACKAGE_REMOVED" />
                <data android:scheme="package" />
            </intent-filter>

//添加权限

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

//在那个PackageChangeReceiver中只是删除文件，我在下面的这段代码中删除了doc文件

// in that PackageChangeReceiver just delete the file I am deleting the doc file in this below code

public class PackageChangeReceiver extends BroadcastReceiver 
{
    @Override
    public void onReceive(Context context, Intent intent) 
    {
    //this.context=context;
    Uri data = intent.getData();
    Log.d("hi", "Action: " + intent.getAction());
    Log.d("hi", "The DATA: " + data);

    String action=intent.getAction();

    if(Intent.ACTION_PACKAGE_REMOVED.equalsIgnoreCase(action))
    {

         String PATH = Environment.getExternalStorageDirectory() + "/mycontent_download/"; 
           File file = new File(PATH);

           if (file.exists())
           {
              String listOfFiles [] = file.list();
               if (listOfFiles!=null)
               {
                  if (listOfFiles.length>0)
                  {
                      int size = listOfFiles.length;
                      for (int i=0; i<size; i++)
                      {
                          if (listOfFiles[i].substring(listOfFiles[i].length()-4, listOfFiles[i].length()).equalsIgnoreCase(".doc"))
                          {
                              File f1 = new File(PATH+listOfFiles[i]);
                              f1.delete();
                          }

                      }
                    }
                  }
               }

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