Khushbu Shah questions

• How to apply validation of local DTD file to xml file in java?
• Native contact change notification
• Good design for common success / failure / error handling for multiple APIs using Retrofit Android
• Can "testBuildType" be conditional in build.gradle file of Android project?
• How to programmatically take Photos while recording Video using Camera2 API in Android
• Auto start application after boot completed in Android
• How it is possible Service run indefinitely and also allow binding in android?
• How to refresh activity after changing language (Locale) inside application

Khushbu Shah answers