在Android中退出应用程序时，如何删除createTempFile创建的所有临时文件? [英] How to delete all temp files which created by createTempFile when exit an App in android?

问题描述

我使用以下代码创建一些临时文件，并将tem包裹为输入组以发送到客户端.

I use the following code to create some temp files, and wrapped tem as inputsteam to send to client side.

我了解到，当磁盘空间不足时，临时文件可以由android系统自动删除.

I understand that the temp files can be deleted automatically by android system when disk space low.

但是我希望退出应用程序时可以自己删除临时文件，该怎么办?谢谢！

But I hope to I can delete the temp files by myself when I exit the App, how can I do? Thanks!

代码

File outputDir = context.getCacheDir(); // context being the Activity pointer
File outputFile = File.createTempFile("prefix", "extension", outputDir);

推荐答案

如果 isChangingConfigurations()为 false 则删除 onDestroy 中的文件 isFinishing 是 true .示例:

Delete the files in onDestroy if isChangingConfigurations() is false or isFinishing is true. Example:

@Override protected void onDestroy() {
  super.onDestroy();
  if(!isChangingConfigurations()) {
    deleteTempFiles(getCacheDir());
  }
}

private boolean deleteTempFiles(File file) {
  if (file.isDirectory()) {
    File[] files = file.listFiles();
    if (files != null) {
      for (File f : files) {
        if (f.isDirectory()) {
          deleteTempFiles(f);
        } else {
          f.delete();
        }
      }
    }
  }
  return file.delete();
}

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