Android使用OnClick从SD卡中删除图像

问题描述

我试图从简单的应用程序中简单地删除图像。我拥有这个功能，当你点击图片时，它会弹出一个对话框，提供删除选项的选项。我认为这只是简单的事情，但我一直在尝试的一切似乎都没有做任何事情。以下是我的代码。任何想法将不胜感激。

  delete.setOnClickListener（new View.OnClickListener（）{
 
 @Override 
 public void onClick（View v）{
 // TODO自动生成的方法存根
 int id = viewIt.getId（）; 
 
文件file = new File（file：/ /+ arrPath [id] +。jpg）; 
 file.delete（）; 
 
 
 
}）; 
  

解决方案

任何声明 WRITE_EXTERNAL_STORAGE 权限的应用程序都被隐式授予。 code> READ_EXTERNAL_STORAGE 权限。

 < uses-permission android：name =android.permission.WRITE_EXTERNAL_STORAGE/> 
  

获取所需文件的路径并删除文件

  File file = new File（android.os.Environment.getExternalStorageDirectory（）+/myfolder/myimage.jpg）; 
 if（file.exists（））
 {
 file.delete（）; 
} 
  

I'm trying to simply delete an image from a simple app. I have it so that when you click on the image, it'll bring up an a dialog with the option to delete it. I thought this would just be something simple, but everything I have been trying doesn't seem to be doing anything. Below is my code. Any ideas would be greatly appreciated.

    delete.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
    int id = viewIt.getId();

    File file = new File("file://" + arrPath[id]+".jpg");
    file.delete();


    }
});

解决方案

Have you added permission in manifest file ?

Any app that declares the WRITE_EXTERNAL_STORAGE permission is implicitly granted READ_EXTERNAL_STORAGE permission.

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

Get the path of the file required and delete the file

File file= new File(android.os.Environment.getExternalStorageDirectory()+ "/myfolder/myimage.jpg");
    if(file.exists())
    {
         file.delete();
    }

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