当Orientation改变android时,Activity重启？

Question

我有一个应用程序,我正在使用Landscape和potrait模式.我在我的每个活动中都使用了android:configChanges ="orientation | keyboardHidden".因此,当我在设备2.3上运行它时,它完全正常工作并且活动没有重新启动.但是当我在android 4.0及更高版本中打开相同的应用程序时,只要方向发生变化,活动就会重新启动.这是我的xml文件.

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


    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />
    <supports-screens android:largeScreens="true"
        android:normalScreens="true" android:smallScreens="true"
        android:anyDensity="true" />
    <supports-screens android:smallScreens="true" />
    <supports-screens android:normalScreens="true" />
    <supports-screens android:largeScreens="true" />


   <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-feature android:name="android.hardware.camera" />
    <uses-feature android:name="android.hardware.camera.autofocus" />
    <uses-permission android:name="android.permission.VIBRATE" />
    <uses-permission android:name="android.permission.FLASHLIGHT" />
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>


    <application

        android:icon="@drawable/cnlogomini"
        android:label="CollaborateNow"
        android:largeHeap="true"
      android:allowBackup="true"
        android:theme="@style/AppTheme" >
        <activity android:name="jim.h.common.android.zxinglib.CaptureActivity"
            android:screenOrientation="landscape" android:configChanges="orientation|keyboardHidden"
            android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
            android:windowSoftInputMode="stateAlwaysHidden" />
        <activity android:name=".Register"
          android:configChanges="orientation|keyboardHidden" ></activity>
        <activity android:name=".ppllogincopy"

           android:configChanges="orientation|keyboardHidden"></activity>

<activity android:name=".Password"

           android:configChanges="orientation|keyboardHidden"></activity>
        <activity android:name=".Camerascan"

           android:configChanges="orientation|keyboardHidden"></activity>
        <activity android:name=".TabGroup1Activity"

            android:configChanges="orientation|keyboardHidden"></activity>
        <activity android:name=".newtab"

            android:configChanges="orientation|keyboardHidden"></activity>
         <activity android:name=".SubmitData"

            android:configChanges="orientation|keyboardHidden"></activity>
         <activity android:name=".peoplelist"

         android:configChanges="orientation|keyboardHidden"></activity>
         <activity android:name=".GenerateQrcode"

        android:configChanges="orientation|keyboardHidden"></activity>
         <activity android:name=".contact"

           android:configChanges="orientation|keyboardHidden"></activity>
         <activity android:name=".peoplelistlogin"

          android:configChanges="orientation|keyboardHidden"></activity>
         <activity android:name=".Startnew"
             android:configChanges="orientation|keyboardHidden"

            ></activity>
          <activity android:name=".projectdetails"

           android:configChanges="orientation|keyboardHidden"></activity>
           <activity android:name=".Signup"

            android:configChanges="orientation|keyboardHidden"></activity>
          <activity android:name=".RegisterScan"

            android:configChanges="orientation|keyboardHidden"></activity>
          <activity android:name=".peoplelistscan"

           android:configChanges="orientation|keyboardHidden"></activity>
        <activity android:name=".Profile"

            android:configChanges="orientation|keyboardHidden"></activity>
        <activity android:name=".List"

            android:configChanges="orientation|keyboardHidden"></activity>
        <activity android:name=".Logout"

           android:configChanges="orientation|keyboardHidden"></activity>
        <activity android:name=".scanRegister"

            android:configChanges="orientation|keyboardHidden"></activity>
        <activity android:name=".scanList"

            android:configChanges="orientation|keyboardHidden"></activity>
        <activity android:name="scanCamera"

            android:configChanges="orientation|keyboardHidden"></activity>
        <activity android:name="com.iconnect.collaborator.Camera"

         android:configChanges="orientation|keyboardHidden"></activity>
       <activity android:name=".collaborations"

           android:configChanges="orientation|keyboardHidden"></activity>


        <activity
            android:name="com.iconnect.collaborator.MainActivity"


            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

</manifest>

Answer 1

如果您android:targetSdkVersion="12"或更少

android:configChanges="orientation|keyboardHidden"

如果您android:targetSdkVersion="13"或更多

android:configChanges="orientation|keyboardHidden|screenSize"

引用developer.android

注意:从Android 3.2(API级别13)开始,当设备在纵向和横向之间切换时,"屏幕大小"也会更改.因此,如果要在开发API级别13或更高级别(由minSdkVersion和targetSdkVersion属性声明)时由于方向更改而阻止运行时重新启动,则除了"orientation"值之外,还必须包含"screenSize"值.也就是说,你必须decalare android:configChanges ="orientation | screenSize".但是,如果您的应用程序的目标是API级别12或更低,那么您的活动始终会自行处理此配置更改(即使在Android 3.2或更高版本的设备上运行,此配置更改也不会重新启动您的活动).

在此处阅读更多信息:处理方向变更