Android的文件选择

问题描述

我想打一个文件上传。而我所以我需要一个文件选择，但我不希望由我自己来写这个。我觉得OI文件管理器，我觉得很适合我。但是，我怎么能强迫用户安装OI文件管理器？如果我不能，有没有更好的办法，包括在我的应用程序文件管理器？THX

I want to make a file uploader. And I hence I need a file chooser but I don't want to write this by myself. I find OI file manager and I think it suits me.But how can I force user to install OI file manager?If I cannot , is there a better way to include a file manager in my app?Thx

推荐答案

修改（ 2012 1月2 的）：

我创建了一个小型的开源的Andr​​oid库项目，简化了这一过程，同时还提供了内置文件浏览器（如果用户不具有一个present）。这是非常简单的使用，要求code只有几行。

I created a small open source Android Library Project that streamlines this process, while also providing a built-in file explorer (in case the user does not have one present). It's extremely simple to use, requiring only a few lines of code.

您可以在GitHub上找到它： aFileChooser

You can find it at GitHub: aFileChooser.

原始的

如果您希望用户可以选择系统中的任何文件，您将需要包括你自己的文件管理器，或者建议用户下载一个。我认为最好的你能做的就是寻找在开的内容的 Intent.createChooser（）是这样的：

If you want the user to be able to choose any file in the system, you will need to include your own file manager, or advise the user to download one. I believe the best you can do is look for "openable" content in an Intent.createChooser() like this:

private static final int FILE_SELECT_CODE = 0;

private void showFileChooser() {
    Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
    intent.setType("*/*");
    intent.addCategory(Intent.CATEGORY_OPENABLE);

    try {
        startActivityForResult(
                Intent.createChooser(intent, "Select a File to Upload"),
                FILE_SELECT_CODE);
    } catch (android.content.ActivityNotFoundException ex) {
        // Potentially direct the user to the Market with a Dialog
        Toast.makeText(this, "Please install a File Manager.",
                Toast.LENGTH_SHORT).show();
    }
}

然后，您可以监听所选文件的乌里在 onActivityResult（）像这样：

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    switch (requestCode) {
        case FILE_SELECT_CODE:
        if (resultCode == RESULT_OK) {
            // Get the Uri of the selected file
            Uri uri = data.getData();
            Log.d(TAG, "File Uri: " + uri.toString());
            // Get the path
            String path = FileUtils.getPath(this, uri);
            Log.d(TAG, "File Path: " + path);
            // Get the file instance
            // File file = new File(path);
            // Initiate the upload
        }
        break;
    }
    super.onActivityResult(requestCode, resultCode, data);
}

在 getPath（）方法我 FileUtils.java 是：

public static String getPath(Context context, Uri uri) throws URISyntaxException {
    if ("content".equalsIgnoreCase(uri.getScheme())) {
        String[] projection = { "_data" };
        Cursor cursor = null;

        try {
            cursor = context.getContentResolver().query(uri, projection, null, null, null);
            int column_index = cursor.getColumnIndexOrThrow("_data");
            if (cursor.moveToFirst()) {
                return cursor.getString(column_index);
            }
        } catch (Exception e) {
            // Eat it
        }
    }
    else if ("file".equalsIgnoreCase(uri.getScheme())) {
        return uri.getPath();
    }

    return null;
}

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