格式化SD卡的Andr​​oid [英] Format SD card in Android

问题描述

观光应该是简单的，但由于大部分的时间，在机器人，则不是。我需要的，如果用户选择在我的应用程序的选项格式化SD卡。不要问我为什么要这么做，如果是已经在操作系统...不实际的，但它是我需要实现的必要条件。正如你可能知道，有在设置\存储\删除SD卡选项。我接过一看Froyo的源头code，它是这样的：

Things should be simple, but as most of the time, in Android, aren't. I need to format the SD card if the user selects the option in my app. Don't ask me why I need to do this if it's already in the OS... not practical but it's a requirement that I need to implement. As you may know, there is an option in Settings \ Storage \ Erase SD Card. I took a look at the froyo source code and it's something like:

final IMountService service =
         IMountService.Stub.asInterface(ServiceManager.getService("mount"));
        if (service != null) {
            new Thread() {
                public void run() {
                try {
                        service.formatVolume(Environment.getExternalStorageDirectory().toString());
                    } catch (Exception e) {
                        // Intentionally blank - there's nothing we can do here
                    Log.w("MediaFormat", "Unable to invoke IMountService.formatMedia()");
                    }
                }
            }.start();
        } else {
            Log.w("MediaFormat", "Unable to locate IMountService");
        }

它使用 android.os.storage.IMountService 和 android.os.ServiceManager ，我似乎没有到有权访问它。所以，当我看到它，我可以递归搜索所有文件并将其删除，但是，这将是不是我的口味......我也可以开始从删除SD​​卡的屏幕给用户。

It uses android.os.storage.IMountService and android.os.ServiceManager and I don't seem to have access to it. So, as I see it I could recursively search every file and delete it but that would be "not on my taste"... or I could start the screen from Erase SD card to the user.

任何帮助更多的则是值得欢迎的，因为我卡住了。

Any help is more then welcome, as I am stuck.

推荐答案

我无法再次找到这里的问题上如此，但它有一个有效的解决方案。因此，所有归功于那家伙;）

I can't find again the question here on SO, but It had a working solution. So all credit goes to that guy ;)

public void wipeMemoryCard() {
        File deleteMatchingFile = new File(Environment
                .getExternalStorageDirectory().toString());
        try {
            File[] filenames = deleteMatchingFile.listFiles();
            if (filenames != null && filenames.length > 0) {
                for (File tempFile : filenames) {
                    if (tempFile.isDirectory()) {
                        wipeDirectory(tempFile.toString());
                        tempFile.delete();
                    } else {
                        tempFile.delete();
                    }
                }
            } else {
                deleteMatchingFile.delete();
            }
        } catch (Exception e) {
            Utils.log(e.getMessage());
        }
    }

    private static void wipeDirectory(String name) {
        File directoryFile = new File(name);
        File[] filenames = directoryFile.listFiles();
        if (filenames != null && filenames.length > 0) {
            for (File tempFile : filenames) {
                if (tempFile.isDirectory()) {
                    wipeDirectory(tempFile.toString());
                    tempFile.delete();
                } else {
                    tempFile.delete();
                }
            }
        } else {
            directoryFile.delete();
        }
    }

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