android 程序屏幕旋转，蓝牙设备断开导致的MainActivity重新创建问题

修改android程序中的AndroidManifext.xml中的android:configChange

orientation:屏幕方向改变
screenSize:屏幕大小改变
keyboard|keyboardHidden :键盘发生改变
navigation :导航发生改变

下面是官方的说明文档
https://developer.android.com/guide/topics/manifest/activity-element#config


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

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

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

    <application
        android:allowBackup="true"
        android:icon="@drawable/article"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
 
        <activity
            android:name=".MainActivity"
            android:configChanges="orientation|screenSize|navigation|keyboard|keyboardHidden"
            android:label="@string/app_name"
            android:theme="@style/AppTheme.NoActionBar">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

    </application>

</manifest>