I used Constraint layout for an activity creation. No compile time error or an exception but on run time, an error occures,
09-12 20:19:57.938 8240-8240/com.easy.sumit.lifeline E/AndroidRuntime: FATAL EXCEPTION: main Process: com.easy.sumit.lifeline, PID: 8240 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.easy.sumit.lifeline/com.easy.sumit.lifeline.activities.MainActivity}: android.view.InflateException: Binary XML file line #11: Binary XML file line #2: Error inflating class android.support.constraint.ConstraintLayout at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2817) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892) at android.app.ActivityThread.-wrap11(Unknown Source:0) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1593) at android.os.Handler.dispatchMessage(Handler.java:105) at android.os.Looper.loop(Looper.java:164) at android.app.ActivityThread.main(ActivityThread.java:6541) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767) Caused by: android.view.InflateException: Binary XML file line #11: Binary XML file line #2: Error inflating class android.support.constraint.ConstraintLayout Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class android.support.constraint.ConstraintLayout Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.constraint.ConstraintLayout" on path: DexPathList[[zip file "/data/app/com.easy.sumit.lifeline-W2en1e4kr7lnHhHBVh4YQg==/base.apk", zip file "/data/app/com.easy.sumit.lifeline-W2en1e4kr7lnHhHBVh4YQg==/split_lib_dependencies_apk.apk", zip file "/data/app/com.easy.sumit.lifeline-W2en1e4kr7lnHhHBVh4YQg==/split_lib_slice_0_apk.apk", zip file "/data/app/com.easy.sumit.lifeline-W2en1e4kr7lnHhHBVh4YQg==/split_lib_slice_1_apk.apk", zip file "/data/app/com.easy.sumit.lifeline-W2en1e4kr7lnHhHBVh4YQg==/split_lib_slice_2_apk.apk", zip file "/data/app/com.easy.sumit.lifeline-W2en1e4kr7lnHhHBVh4YQg==/split_lib_slice_3_apk.apk", zip file "/data/app/com.easy.sumit.lifeline-W2en1e4kr7lnHhHBVh4YQg==/split_lib_slice_4_apk.apk", zip file "/data/app/com.easy.sumit.lifeline-W2en1e4kr7lnHhHBVh4YQg==/split_lib_slice_5_apk.apk", zip file "/data/app/com.easy.sumit.lifeline-W2en1e4kr7lnHhHBVh4YQg==/split_lib_slice_6_apk.apk", zip file "/data/app/com.easy.sumit.lifeline-W2en1e4kr7lnHhHBVh4YQg==/split_lib_slice_7_apk.apk", zip file "/data/app/com.easy.sumit.lifeline-W2en1e4kr7lnHhHBVh4YQg==/split_lib_slice_8_apk.apk", zip file "/data/app/com.easy.sumit.lifeline-W2en1e4kr7lnHhHBVh4YQg==/split_lib_slice_9_apk.apk"],nativeLibraryDirectories=[/data/app/com.easy.sumit.lifeline-W2en1e4kr7lnHhHBVh4YQg==/lib/x86, /system/lib, /system/vendor/lib]] at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:93) at java.lang.ClassLoader.loadClass(ClassLoader.java:379) at java.lang.ClassLoader.loadClass(ClassLoader.java:312) at android.view.LayoutInflater.createView(LayoutInflater.java:606) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:790) at android.view.LayoutInflater.parseInclude(LayoutInflater.java:965) at android.view.LayoutInflater.rInflate(LayoutInflater.java:859) at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824) at android.view.LayoutInflater.parseInclude(LayoutInflater.java:995) at android.view.LayoutInflater.rInflate(LayoutInflater.java:859) at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824) at android.view.LayoutInflater.inflate(LayoutInflater.java:515) at android.view.LayoutInflater.inflate(LayoutInflater.java:423) at android.view.LayoutInflater.inflate(LayoutInflater.java:374) at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:288) at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140) at com.easy.sumit.lifeline.activities.MainActivity.onCreate(MainActivity.java:51) at android.app.Activity.performCreate(Activity.java:6975) 09-12 20:19:57.939 8240-8240/com.easy.sumit.lifeline E/AndroidRuntime: at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1213) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2770) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892) at android.app.ActivityThread.-wrap11(Unknown Source:0) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1593) at android.os.Handler.dispatchMessage(Handler.java:105) at android.os.Looper.loop(Looper.java:164) at android.app.ActivityThread.main(ActivityThread.java:6541) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767) ////////////////////////////////////////////////activity_main.xml <?xml version="1.0" encoding="utf-8"?> <android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/drawer_layout" android:layout_width="match_parent" android:layout_height="match_parent" android:fitsSystemWindows="true" tools:openDrawer="start"> <include layout="@layout/app_bar_main" android:layout_width="match_parent" android:layout_height="match_parent" /> <android.support.design.widget.NavigationView android:id="@+id/nav_view" android:layout_width="wrap_content" android:layout_height="match_parent" android:layout_gravity="start" android:fitsSystemWindows="true" app:headerLayout="@layout/nav_header_main" app:itemIconTint="@color/icon_color" app:itemTextColor="@color/colorText" app:menu="@menu/activity_main_drawer" /> </android.support.v4.widget.DrawerLayout> //////////////////////////////////////////content_home.xml <?xml version="1.0" encoding="utf-8"?> <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/content_home_relative_layout" android:layout_width="match_parent" android:layout_height="match_parent" app:layout_behavior="@string/appbar_scrolling_view_behavior" tools:context="com.easy.sumit.lifeline.activities.MainActivity" tools:showIn="@layout/app_bar_main"> <WebView android:id="@+id/webView" android:layout_width="0dp" android:layout_height="0dp" android:background="@color/colorBackground" android:visibility="visible" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" /> </android.support.constraint.ConstraintLayout> -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+unsubscr...@googlegroups.com. To post to this group, send email to android-developers@googlegroups.com. Visit this group at https://groups.google.com/group/android-developers. To view this discussion on the web visit https://groups.google.com/d/msgid/android-developers/8719c974-cb1e-48f7-8149-2f9a2abc8091%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.