Question

我已将<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />添加到Manifest，但在执行以下代码时仍然会获得“SDcard挂载RO”。我在这里做错了什么？

    if(!extState.equals(Environment.MEDIA_MOUNTED)) {
        Log.d(Tag.getTag(this),
                ("SDcard not mounted"));
    }
    else if (!extState.equals(Environment.MEDIA_MOUNTED_READ_ONLY)) {
        Log.d(Tag.getTag(this),
                ("SDcard mounted RO"));
    }
    else {
        Log.d(Tag.getTag(this),
                ("SDcard mounted RW"));
    }

Answer 1

您的代码逻辑似乎有误？

if(!extState.equals(Environment.MEDIA_MOUNTED)) {
    Log.d(Tag.getTag(this),
            ("SDcard not mounted"));
}
else ...

“不等于MEDIA_MOUNTED”可能是“mounted_ro”或“未装载”......

无论如何，你应该改为......

if(extState.equals(Environment.MEDIA_MOUNTED)) {
    Log.d(Tag.getTag(this),
            ("SDcard mounted RW"));

}
else if (extState.equals(Environment.MEDIA_MOUNTED_READ_ONLY)) {
    Log.d(Tag.getTag(this),
            ("SDcard mounted RO"));
}
else {
    Log.d(Tag.getTag(this),
            ("SDcard not mounted"));
}

设置权限后，SD卡仅RO

1 个答案: