multidex Unable to get provider com.vivo.upgrade.library.provider.FileProvider

背景：

集成一个斑马无线条码打印机，报了一堆错误

classes in a single dex file methods 67667 大于 65536

后来

Unable to get provider com.open.hule.library.downloadmanager.DownloadFileProvider

解决：

defaultConfig {
    applicationId "com.czszsoft.wms"
    minSdkVersion 19
    targetSdkVersion 29
    versionCode 1
    versionName "1.1.0"

    testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    multiDexEnabled true
}

dependencies {
    implementation fileTree(dir: "libs", include: ["*.jar"])
    implementation 'com.android.support:multidex:1.0.3'
}

public class AppContext extends MultiDexApplication {

　　@Override
　　protected void attachBaseContext(Context base) {
    　　super.attachBaseContext(base);
    　　MultiDex.install(this);
　　}

}