Below is my xml file. In preview there is two error'Failed to load AppCompat ActionBar with unknown error' & 'Failed to instaniate more than one class'. How ever am able to run the app.But the app crashes and in Logcat no errors are shown.
This is my preview screen shot
<?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="506dp" />
<LinearLayout
android:id="@+id/layout_main"
android:orientation="vertical"
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:layout_width="match_parent"
android:layout_height="match_parent"
android:weightSum="1"
tools:context=".Activity.MainActivity">
<LinearLayout
android:id="@+id/main_layout"
android:orientation="vertical"
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:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="0.7"
tools:context=".Activity.MainActivity">
<!-- our tablayout to display tabs -->
<android.support.design.widget.TabLayout
android:id="@+id/tabLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="50dp"
app:tabMode="scrollable"
app:tabSelectedTextColor="@color/colorBlack"
app:tabTextColor="@color/colorWhite"
android:background="@color/colorOran"
android:minHeight="?attr/actionBarSize"
/>
<!-- View pager to swipe views -->
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>
<LinearLayout
android:id="@+id/ll"
android:layout_width="match_parent"
android:layout_height="64dp"
android:layout_alignParentBottom="true"
android:background="#ffffff"
android:orientation="horizontal"
android:layout_weight="0.3"
android:weightSum="4"
tools:layout_editor_absoluteX="8dp"
android:layout_marginBottom="8dp"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true">
<ImageView
android:id="@+id/btn_home"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="1"
android:src="@drawable/ta_home_icon"
android:background="@color/colorOran"
android:layout_marginRight="1dp"
android:scaleType="fitCenter"/>
<ImageView
android:id="@+id/btn_new"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="1"
android:src="@drawable/ta_todaydeals_icon"
android:background="@color/colorOran"
android:layout_marginRight="1dp"
android:scaleType="fitCenter"/>
<ImageView
android:id="@+id/btn_fav"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="1"
android:src="@drawable/ta_fav_icon"
android:background="@color/colorOran"
android:layout_marginRight="1dp"
android:scaleType="fitCenter"/>
<ImageView
android:id="@+id/btn_auth"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="1"
android:src="@drawable/ta_franchie_icon"
android:background="@color/colorOran"
android:scaleType="fitCenter"
android:layout_marginRight="1dp"
/>
</LinearLayout>
</LinearLayout>
<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:menu="@menu/activity_main_drawer" />
</android.support.v4.widget.DrawerLayout>
Below is appbar_main
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.jeyashri.kitchen.jeyashriskitchen.Activity.MainActivity">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="@color/colorOran"
app:popupTheme="@style/AppTheme.PopupOverlay">
<ImageView
android:id="@+id/app_logo"
android:layout_width="80dp"
android:layout_height="match_parent"
android:src="@drawable/img"/>
<ImageView
android:id="@+id/btn_social"
android:layout_width="75dp"
android:layout_height="35dp"
android:layout_marginRight="1dp"
android:src="@drawable/share_icon" />
</android.support.v7.widget.Toolbar>
</android.support.design.widget.AppBarLayout>
<include layout="@layout/content_main" />
</android.support.design.widget.CoordinatorLayout>
This question is related to
android
android-actionbar
The answer is
Faced the same problem in Android Studio 3.1.3
Just go to style.xml file
and replace Theme name
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
with
<style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar">
Then clean and rebuild the project.This will solve the error.
Use this one:
implementation 'com.android.support:appcompat-v7:26.0.0-beta1'
implementation 'com.android.support:design:26.0.0-beta1'
instead of
implementation 'com.android.support:appcompat-v7:26.0.0-beta2'
implementation 'com.android.support:design:26.0.0-beta2'
In my case it removed the rendering problem.
I also had this problem with implementation 'com.android.support:appcompat-v7:28.0.0-alpha3'.
The solution for me was to go File -> Invalidate Caches / Restart -> Invalidate -> Close Project -> Remove project from project window -> Open Project (from project window).
I also had this problem and it's solved as change line from res/values/styles.xml
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
to
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar"><style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar">
both solutions worked
Replace implementation 'com.android.support:appcompat-v7:28.0.0-beta01' with
implementation 'com.android.support:appcompat-v7:28.0.0-alpha1'
in build.gradle (Module:app). It fixed my red mark in Android Studio 3.1.3
found it on this site, it works on me. Modify /res/values/styles.xml from:
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
</style>
to:
<style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar">
</style>
Method 1:
Locate /res/values/styles.xml
Change
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
To
<style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar">
Method 2:
Modify template file(locate: android-studio/plugins/android/lib/templates/gradle-projects/NewAndroidModule/root/res/values/styles.xml.ftl)
Change
backwardsCompatibility!true>Theme.AppCompat<#else><#if
To
backwardsCompatibility!true>Base.Theme.AppCompat<#else><#if
Watch Solution On YouTube
This is Worked for me i have made the following changes in Style.xml
Change the Following Code:
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
With
<style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar">
Try this:
Just change:
compile 'com.android.support:appcompat-v7:26.0.0-beta2'
to:
compile 'com.android.support:appcompat-v7:26.0.0-beta1'
This is the minimum configuration that solves the problem.
use:
dependencies {
...
implementation 'com.android.support:appcompat-v7:26.1.0'
...
}
with:
compileSdkVersion 26
buildToolsVersion "26.0.1"
and into the build.gradle file located inside the root of the proyect:
buildscript {
...
....
dependencies {
classpath 'com.android.tools.build:gradle:3.0.1'
...
...
}
}
Open preview mode
follow the below link to fix the issue
Fix - Rendering Problems The Following classes could not be found : android.support.v7.internal
goto appTheme ----> select Holo Theme ---> refresh
June 2018 Issue fixed by using a different appcompact version. Use these codes onto your project dependencies...
In build.gradle(Module: app) add this dependency
implementation 'com.android.support:appcompat-v7:28.0.0-alpha1'
Happy Coding... :)
I was also facing the same problem. Nothing like changing theme from Layout preview window helped me.
What helped me was adding this to Apptheme in styles.xml:
dependencies {
implementation 'com.android.support:appcompat-v7:27.0.2'
implementation 'com.android.support:design:27.0.2'
}
Still it was giving me the error: "cannot resolve symbol widget...coordinatorLayout". Then I updated my build.gradle(app) with:
dependencies {
implementation 'com.android.support:appcompat-v7:27.0.2'
implementation 'com.android.support:design:27.0.2'
}
One more thing:
compileSdkVersion 27
targetSdkVersion 27
in android 3.0.0 canary 6 you must change all 2.6.0 beta2 to beta1 (appcompat,design,supportvector)
Source: Stackoverflow.com