安卓上：mkdir（）返回false [英] Android: mkdir() returns false

问题描述

我驱动疯狂的：

Log.d("STATE", Environment.getExternalStorageState());
File f = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM), "work_data");
Log.d("PATH", f.getAbsolutePath());
if (!f.exists()) {
    Log.d("MAKE DIR", f.mkdirs() + "");
}

输出日志是这样的：

The output log is like this:

STATE     mounted
PATH      /mnt/sdcard/DCIM/work_data
MAKE DIR  false

我甚至已经添加的权限：

I even have added permission:

 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> 

但我不知道为什么它不能创建文件夹。我还用的mkdir（）一步，但结果步骤是一样的。请帮我。我用Google搜索了这么多，但他们都不帮我。我花了至少2个一天，在这种愚蠢的事情。感谢您的帮助！

But I don't know why it could not create the folder. I also used mkdir() step by step but result is the same. Please help me. I have googled so much but none of them helps me. I spent at least 2 day on this stupid thing. Thanks for your help!!

编辑：

对不起大家！我又增加了＆LT;使用-权限的Andr​​oid：名称=android.permission.WRITE_EXTERNAL_STORAG​​E/＆GT; 在＆lt;应用＆GT; 标记。这是我的错！但还是非常感谢大家的回答。

Sorry everyone! I had added <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> in <application> tag. this was my mistake! But thank you all for reply.

推荐答案

我有同样的问题，我已经寻找一切一个星期试图找到答案。我想我找到它，我认为这是可笑容易，你必须把用途，权限声明在正确的地方......

I have had the same problem and I have searched everything for a week trying to find the answer. I think I found it and I think it's ridiculously easy, you have to put the uses-permission statement in the right place...

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.company.name" 
    android:versionCode="1"
    android:versionName="0.2">

    <uses-sdk android:minSdkVersion="8" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

当我有它的＆lt内;用途＆gt;＆LT; /用途＆gt;部分没有奏效。如果这会有所帮助，请其标记为回答和投票我。谢谢！！！！

When I had it inside the <application></application> section it did not work. If this helps, please mark it as answered and vote me up. Thanks!!!!

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