Want to know the whereabouts of mobile phone cookies? Here are the answers!

Mobile cookies refer to small text files stored on mobile devices and are used to transfer information between the browser and the website to provide a better user experience and personalized services. However, we sometimes encounter problems such as missing cookies or the inability to write new cookies. If you have encountered these problems, this article will provide you with detailed answers and code examples.

First, let us understand the common problems with mobile cookies.

1. Missing cookies: This problem is usually caused by browser settings or clearing cookies.
2. Unable to write new cookies: This problem may be caused by issues such as disabled cookies or the folder being unwritable.

Next, we will provide some solutions and code examples.

Solution 1: Check and change browser settings

If you are experiencing issues with missing cookies, it may be because your browser settings have disabled cookies or cleared cookies. To resolve this issue, open your browser settings and make sure cookies are enabled.

For Safari browser, you can take the following steps:

1. Open Safari browser
2. Click "Preferences"
3. Click "Privacy" ” tab
4. Click “Always Allow” in “Cookies & Site Data”

For Chrome browser, you can take the following steps:

1. Open Chrome Browser
2. Click "Settings"
3. Click "Advanced" options
4. Click "Website Settings" in "Privacy and Security"
5. Click on "Cookies and Site Data"
6. Click on the "Block all cookies" option on "Off"

If you wish to enable cookies in your Android application, please add the following code into the AndroidManifest.xml file:

<uses-permission android:name="android.permission.INTERNET" />
<application
    android:name=".MyApplication"
    android:allowBackup="true"
    android:debuggable="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

Solution 2: Make sure the folder is writable

If you are unable to write new cookies, it may be because the folder is not writable. To resolve this issue, check in your code whether the specified folder has write permissions.

In Android applications, you can use the following code example to check whether a folder is writable:

File file = new File(getCacheDir(), "test.txt");     //指定文件
try {
    FileWriter fileWriter = new FileWriter(file);
    fileWriter.write("test");      //写入测试内容
    fileWriter.close();
} catch (IOException e) {
    e.printStackTrace();
}

With the above code example, you can create a file named "test" in the specified folder .txt" file and write the test content into it.

Summary

Mobile cookies are of great significance to both websites and users, but sometimes they encounter problems. This article provides two solutions and corresponding code examples to help you better use and manage mobile cookies.

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