android-room – Page 8

Android room persistent: AppDatabase_Impl does not exist

September 26, 2022 by Tarik

For those working with Kotlin, try changing annotationProcessor to kapt in the apps build.gradle for example: // Extensions = ViewModel + LiveData implementation “android.arch.lifecycle:extensions:1.1.0” kapt “android.arch.lifecycle:compiler:1.1.0” // Room implementation “android.arch.persistence.room:runtime:1.0.0” kapt “android.arch.persistence.room:compiler:1.0.0” also remember to add this plugin apply plugin: ‘kotlin-kapt’ to the top of the app level build.gradle file and do a clean and … Read more

Room persistance library. Delete all

September 22, 2022 by Tarik

You can create a DAO method to do this. @Dao interface MyDao { @Query(“DELETE FROM myTableName”) public void nukeTable(); }

How to make primary key as autoincrement for Room Persistence lib

September 18, 2022 by Tarik

You need to use the autoGenerate property Your primary key annotation should be like this: @PrimaryKey(autoGenerate = true) Reference for PrimaryKey.

Room – Schema export directory is not provided to the annotation processor so we cannot export the schema

September 7, 2022 by Tarik

In the build.gradle file for your app module, add this to the defaultConfig section (under the android section). This will write out the schema to a schemas subfolder of your project folder. javaCompileOptions { annotationProcessorOptions { arguments += [“room.schemaLocation”: “$projectDir/schemas”.toString()] } } Like this: // … android { // … (compileSdkVersion, buildToolsVersion, etc) defaultConfig { … Read more