FileProvider 类未解析 [英] FileProvider Class Unresolved

问题描述

我正在尝试做本教程.

我已按照所有步骤进行操作，但由于出现错误说明而无法构建

I have followed all the steps but I am unable to build due to an error stating

未解析的类 FileProvider

Unresolved Class FileProvider

我安装了支持存储库.我目前的成绩如下:

I have the support repository installed. My current grade is as follows:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 26
    defaultConfig {
        applicationId "com.mydomain.example"
        minSdkVersion 19
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
}

如何让 Android Studio 识别 FileProvider 类?

How do I get Android Studio to recognize the FileProvider class?

这是清单中的内容:

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

    </application>

推荐答案

添加到模块的 gradle 文件的 dependencies.

Add to your module's gradle file's dependencies.

实现'com.android.support:support-v4:26.0.0'

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