android-設置權限後提示SDcard mounted RO

設置權限後提示"SDcard mounted RO"

我在 Manifest 文件中添加<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />。當我運行下面的代碼時，提示"SDcard mounted RO"。哪裡出錯呢？

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"));
    }

最佳回答：

!extState.equals(Environment.MEDIA_MOUNTED_READ_ONLY)

不為RO時提示RO。錯在這裡，去掉“!”