Android:如何从外部存储中删除文件？

Question

我实现了一个在外部存储中生成和创建文件的应用程序.你能帮帮我,我们怎么能删除它？

谢谢钱德拉

编辑-1: 我添加了以下代码,但我仍然遇到同样的问题,请看下面的代码,

String fullPath = "/mnt/sdcard/";
System.out.println(fullPath);
try{
    File file = new File(fullPath, "audio.mp3");
    if(file.exists()){
        boolean result = file.delete();
        System.out.println("Application able to delete the file and result is: " + result);
        // file.delete();
    }else{
        System.out.println("Application doesn't able to delete the file");
    }
}catch (Exception e){
    Log.e("App", "Exception while deleting file " + e.getMessage());
}

在LogCat中我得到Application能够删除文件,结果是:false.执行此操作后,我附加了屏幕截图.请仔细看看.并建议我.

Answer 1

File file = new File(selectedFilePath);
boolean deleted = file.delete();

其中selectedFilePath是您要删除的文件的路径 - 例如:

/sdcard/YourCustomDirectory/ExampleFile.mp3

Answer 2

我认为您忘记将写入权限放入 AndroidManifest.xml 文件中，这就是为什么 delete() 总是返回 false 的原因。

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

Answer 3

File file = new File(selectedFilePath);
boolean deleted = file.delete();

路径会是这样的：/mnt/Pictures/SampleImage.png