Android.support.design.widget.TextInputLayout Could Not Be Instantiated
Answer : replace android.support.design.widget.TextInputLayout with com.google.android.material.textfield.TextInputLayout If you uses AndroidStudio, you should not include android-support-design.jar. Instead, write like below in your build.gradle: dependencies { ... compile 'com.android.support:design:24.0.0' ... } Edit : If this doesn't work you are probably using a different version. In Windows, go to: [android-sdk]\extras\android\m2repository\com\android\support\design On Mac: sdk/extras/android/m2repository/com/android/support/design This directory holds a number of version folders. Use the latest version on your build.gradle. add in the build.gradle following this line: implementation 'com.android.support:design:28.0.0' and use in the xml file: <com.google.android.material.textfield.TextInputLayout android:id="@+id/inputLayoutMobile" android:layout_width="ma...