Android：无法在棒棒糖lenovo

Question

我想在外部SD卡中创建目录，我在MI（Android M），三星和联想（Android L）中测试了我的代码。下面的代码在除棒棒糖之外的所有设备中都能正常工作。

private void crateDirectory() {

    Log.d(TAG, "inside  crateDirectory()  ");
    try {
        String extPath = "";
        String base = "/storage/sdcard1/"; //lenovo
        // String base="/storage/9F44-E930/"; //  for xiaomi

        File baseFile = new File(base);
        Log.d(TAG, "baseFile.exists()   >>" + baseFile.exists());        // resulting TRUE
        String path = "Android/data/package name/files/";
        extPath = base + path;


        Log.d(TAG, "exPath   >>" + extPath);
        File myFile = new File(Environment.DIRECTORY_DOWNLOADS + "/MY Download");

        Log.d(TAG, "myFile  >>" + myFile.getAbsolutePath());

        File outputFile = new File(extPath, "" + myFile.getAbsolutePath());

        if (!outputFile.exists()) {
            Log.d(TAG, "Creating outputFile ....");
            outputFile.mkdirs();
        }

        Log.d(TAG, "outputFile.exists()   >>" + outputFile.exists() + "\n outputFile >>" + outputFile.getAbsolutePath());
    } catch (Exception e) {
        Log.d(TAG, "Exception   >>" + Log.getStackTraceString(e));
    }
    Log.d(TAG, "end of crateDirectory()  ");
}