检查android资产文件夹html文件的存在

Question

我将html文件作为“file：///android_asset/WebApplication/index.html”传递。如何在android中检查此文件是否存在。

Answer 1

您可以尝试打开流，如果失败则文件不在那里，如果没有失败，文件应该在那里：

/**
 * Check if an asset exists. This will fail if the asset has a size < 1 byte.
 * @param context
 * @param path
 * @return TRUE if the asset exists and FALSE otherwise
 */
public static boolean assetExists(Context context, String path) {
    boolean bAssetOk = false;
    try {
        InputStream stream = context.getAssets().open(ASSET_BASE_PATH + path);
        stream.close();
        bAssetOk = true;
    } catch (FileNotFoundException e) {
        Log.w("IOUtilities", "assetExists failed: "+e.toString());
    } catch (IOException e) {
        Log.w("IOUtilities", "assetExists failed: "+e.toString());
    }
    return bAssetOk;
}

Answer 2

[Android Assets]: File or Folder?

How to get all files from assets folder

File f=new File("file:///android_asset/");  
    File[] files=f.listFiles();

如果文件返回null den，则理解文件夹为空。