java - 无法锁定方向；可能的修复？

Question

默认情况下仅尝试将方向设置为 Portrait。为此，我添加了:

android:configChanges="orientation"
android:screenOrientation="portrait"

但是，应用程序会在倾斜时自动旋转到横向 模式。此外，即使在手机 Settings 中将方向锁定为纵向，应用也会在倾斜时转为 Landscape 模式。

这是 Manifest.xml 文件:

    <?xml version="1.0" encoding="utf-8"?>
    <manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="com.browser.codedady">

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="com.android.launcher.permission.INSTALL_SHORTCUT" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />

    <application
        android:allowBackup="true"
        android:fullBackupContent="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme"
        tools:ignore="GoogleAppIndexingWarning">

        <!-- Browser Main Tab -->

        <activity
            android:name=".Activity_Main"
            android:configChanges="orientation"
            android:screenOrientation="portrait"
            android:label="@string/app_name"
            android:launchMode="singleInstance">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

                <action android:name="readLater" />
                <action android:name="bookmarks" />
                <action android:name="history" />
                <action android:name="pass" />
            </intent-filter>
            <intent-filter
                android:icon="@mipmap/ic_launcher"
                android:label="@string/app_websearch">
                <action android:name="android.intent.action.SEND" />

                <category android:name="android.intent.category.DEFAULT" />

                <data android:mimeType="text/plain" />
            </intent-filter>

            <meta-data
                android:name="android.app.shortcuts"
                android:resource="@xml/shortcuts" />
        </activity>

        <!-- Other activities -->

        <activity
            android:name=".about.About_activity"
            android:configChanges="orientation|screenSize"
            android:launchMode="singleInstance" />
        <activity
            android:name=".helper.Activity_intro"
            android:configChanges="orientation|screenSize"
            android:launchMode="singleInstance" />
        <activity
            android:name=".helper.Activity_settings"
            android:configChanges="orientation|screenSize"
            android:launchMode="singleInstance" />
        <activity
            android:name=".helper.Activity_settings_app"
            android:configChanges="orientation|screenSize"
            android:launchMode="singleInstance" />
        <activity
            android:name=".helper.Activity_settings_data"
            android:configChanges="orientation|screenSize"
            android:launchMode="singleInstance" />
        <activity
            android:name=".helper.Activity_settings_searchMain"
            android:configChanges="orientation|screenSize"
            android:launchMode="singleInstance" />
        <activity
            android:name=".helper.Activity_settings_close"
            android:configChanges="orientation|screenSize"
            android:launchMode="singleInstance" />
        <activity
            android:name=".helper.Activity_settings_start"
            android:configChanges="orientation|screenSize"
            android:launchMode="singleInstance" />
        <activity
            android:name=".helper.Activity_settings_search"
            android:configChanges="orientation|screenSize"
            android:launchMode="singleInstance" />

        <!-- Intents -->

        <activity
            android:name=".helper.Activity_intent"
            android:label="@string/app_name"
            android:noHistory="true"
            android:screenOrientation="portrait"
            android:theme="@android:style/Theme.Translucent.NoTitleBar">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
            </intent-filter>
            <intent-filter>
                <category android:name="android.intent.category.DEFAULT" />
                <category android:name="android.intent.category.BROWSABLE" />

                <action android:name="android.intent.action.VIEW" />

                <data android:scheme="http" />
                <data android:scheme="https" />
            </intent-filter>
        </activity>

        <!-- More stuff -->

        <provider
            android:name="android.support.v4.content.FileProvider"
            android:authorities="com.browser.codedady.provider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/file_paths" />
        </provider>

        <activity
            android:name=".Home"
            android:label="@string/title_activity_home"
            android:theme="@style/AppTheme" />

    </application>

</manifest>

可能是什么原因造成的，如何解决这个问题？

Answer 1

为每个 Activity 添加 screenOrientation = "portrait"，如下所示:

<activity
        android:name=".MainActivity"
        android:screenOrientation="portrait" />

确保您的 Java 代码不会意外改变 Activity 的方向。 Configchanges 没有将它设置为默认值，它要求 Java 负责设置它。如果他们不做任何其他事情，请将其删除。 See android docs here (搜索“android:configChanges”)