问题描述：uniapp在线打包调用相机拍照正常，离线打包的时候没有反应

解决方法：

1.在application节点下添加provider节点

<provider
    android:name="io.dcloud.common.util.DCloud_FileProvider"
    android:authorities="${apk.applicationId}.dc.fileprovider"
    android:exported="false"
    android:grantUriPermissions="true">
        <meta-data
        android:name="android.support.FILE_PROVIDER_PATHS"
        android:resource="@xml/dcloud_file_provider" />
</provider>

${apk.applicationId}须替换成应用的包名。参考下方AndoridManifest.xml 配置

2.添加相机权限

<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
<!-- 摄像头权限 -->
<uses-permission android:name="android.permission.CAMERA" />
<!-- 开启闪光灯权限 -->
<uses-permission android:name="android.permission.FLASHLIGHT"/>

AndoridManifest.xml 配置参考实例

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="uni.UN0E5F33">

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

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

    <uses-permission android:name="android.permission.BLUETOOTH_SCAN"/>
    <uses-permission android:name="android.permission.BLUETOOTH_CONNECT"/>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

    <uses-feature android:name="android.hardware.camera" />
    <uses-feature android:name="android.hardware.camera.autofocus" />
    <!-- 摄像头权限 -->
    <uses-permission android:name="android.permission.CAMERA" />
    <!-- 开启闪光灯权限 -->
    <uses-permission android:name="android.permission.FLASHLIGHT"/>


    <application
        android:requestLegacyExternalStorage="true"
        android:allowBackup="true"
        android:allowClearUserData="true"
        android:icon="@drawable/icon"
        android:label="@string/app_name"
        android:largeHeap="true"
        android:supportsRtl="true">
        <activity
            android:name="io.dcloud.PandoraEntry"
            android:configChanges="orientation|keyboardHidden|keyboard|navigation"
            android:label="@string/app_name"
            android:launchMode="singleTask"
            android:hardwareAccelerated="true"
            android:theme="@style/TranslucentTheme"
            android:screenOrientation="user"
            android:windowSoftInputMode="adjustResize" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name="io.dcloud.PandoraEntryActivity"
            android:launchMode="singleTask"
            android:configChanges="orientation|keyboardHidden|screenSize|mcc|mnc|fontScale|keyboard|smallestScreenSize|screenLayout|screenSize|uiMode"
            android:hardwareAccelerated="true"
            android:permission="com.miui.securitycenter.permission.AppPermissionsEditor"
            android:screenOrientation="user"
            android:theme="@style/DCloudTheme"
            android:windowSoftInputMode="adjustResize">
            <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=" " />
            </intent-filter>
        </activity>
        <provider
            android:name="io.dcloud.common.util.DCloud_FileProvider"
            android:authorities="uni.UN0E5F33.dc.fileprovider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/dcloud_file_provider" />
        </provider>
        <meta-data
            android:name="dcloud_appkey"
            android:value="fd271a54c9fade93ca08c" />
    </application>

</manifest>