Develop Reference

Android Navigation Drawer RTL crash

I'm using appcompact for navigation drawer, everything is working perfectly as following, but when i try to change the drawer from RTL using android:layout_gravity="start" the app compiles but on the click of the icon it crashes any idea what's causing the crash and how to make it RTL
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="64dp"
android:background="#color/color_primary"
android:minHeight="?attr/actionBarSize" />
<android.support.v4.widget.DrawerLayout
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="start">
<!-- Main layout -->
<FrameLayout
android:id="#+id/main_fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<!-- The navigation drawer -->
<ListView android:id="#+id/left_drawer"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="end"
android:choiceMode="singleChoice"
android:divider="#android:color/transparent"
android:dividerHeight="0dp"
android:background="#ccc"/>
</android.support.v4.widget.DrawerLayout>
here's the error log
Process: inducesmile.com.androidnavigationdrawer, PID: 15182
java.lang.IllegalArgumentException: No drawer view found with gravity LEFT
at

As you said, you're opening the navigation drawer by the "android:layout_gravity="start" attribute : That's is good for the RTL compatibility.
The thing is when the application is
LTR : START = LEFT and END = RIGHT
RTL : START = RIGHT and END = LEFT
So you should be careful when using LEFT and RIGHT attributes : we generally use them only when there is a view, text direction or many other attributes that should keep the same whatever the language you're using.
So your java exception says that your class is using Gravity.LEFT instead of Gravity.START :
So you are trying to open a drawer from the Gravity.LEFT side where on you layout said layout_gravity="start" it gonna open the right side on RTL : the two attributes must always be the same.
For example must change :
myDrawerLayout.openDrawer(Gravity.LEFT);
to :
myDrawerLayout.openDrawer(Gravity.START);
Update 03/2022
It seems for androidx packages, they are using the class GravityCompat instead of Gravity
So instead of doing :
myDrawerLayout.openDrawer(Gravity.START);
You may need to do :
myDrawerLayout.openDrawer(GravityCompat.START);

fragment_activity and fargment_navigation_drawer

I'm trying to build an app ... using navigation drawer project.
When I create it I found that there are 3 layouts, namely, activity_main, fragment_activity and fragment_navigation_drawer. And I want to know the relationship between these layouts.
I want to know what I must know about navigation drawer project to make this app good!!
And, who can give me a website to learn advanced Android?
Here is what the activity_main is contained:
<i>!-- A DrawerLayout is intended to be used as the top-level content view using match_parent for both width and height to consume the full space available. -->
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:id="#+id/drawer_layout"
android:layout_width="match_parent" android:layout_height="match_parent"
tools:context=".MainActivity">
<!-- As the main content view, the view below consumes the entire
space available using match_parent in both dimensions. -->
<FrameLayout android:id="#+id/container" android:layout_width="match_parent"
android:layout_height="match_parent" >
</FrameLayout>
<!-- android:layout_gravity="start" tells DrawerLayout to treat
this as a sliding drawer on the left side for left-to-right
languages and on the right side for right-to-left languages.
If you're not building against API 17 or higher, use
android:layout_gravity="left" instead. -->
<!-- The drawer is given a fixed width in dp and extends the full height of
the container. -->
<fragment android:id="#+id/navigation_drawer"
android:layout_width="#dimen/navigation_drawer_width" android:layout_height="match_parent"
android:layout_gravity="start"
android:name="com.main.project.myapplication.NavigationDrawerFragment"
tools:layout="#layout/fragment_navigation_drawer" />
</android.support.v4.widget.DrawerLayout> </i>
Thanks.

Android.view.inflateException Binary XML file line #7 Error inflating class<unknown>

This question has been asked previously. Problem is same but the answers couldn't solve my problem.
this question Unknown error while using DrawerLayout? has same problem like me and i tried the steps given but no luck.i have layout file:
activity_main.xml:
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<!-- as the main content the following view takes the whole space for content display..using match_parent in both the sections -->
<FrameLayout
android:id="#+id/content_frame"
android:layout_height="match_parent"
android:layout_width="match_parent"
/>
<!-- android:layout_gravity="start" tells the Drawerlayout to treat this as the sliding drawer on the left side for the left-to-right
language...and on right side for the right-to-left languages..a solid contrast is used to differentiate it from the content view.. -->
<ListView
android:id="#+id/left_drawer"
android:layout_width="240dp"
android:layout_height="wrap_content"
android:layout_gravity="start"
android:dividerHeight="0dp"
android:background="#ffff"
/>
</android.support.v4.widget.DrawerLayout>
The logcat says android.view.InflateException:Binary XML file line #7:Error inflating class<unknown>..
I have added support library and tried the solution given to that question but i couldnot solve the issue ..

DrawerLayout Not Scrolling

I notice that the drawers within the Google applications are scrollable, but I cannot for some reason come to the conclusion of how to achieve a scrollable DrawerLayout. I attempted to construct the layout file with the following design paradigm.
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/drawerLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/frameLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".mainScreen">
<!-- Layout of Activity -->
</FrameLayout>
<!-- DrawerLayout segment -->
<ScrollView
android:id="#+id/scrollView"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="#+id/drawerLinearLayout"
android:orientation="vertical"
android:layout_width="260dp"
android:layout_height="match_parent"
android:layout_gravity="start|bottom"
android:layout_marginTop="?android:attr/actionBarSize"
android:divider="#android:color/transparent"
android:dividerHeight="0dp"
android:background="#77000000">
<!-- Layout of Drawer -->
</LinearLayout>
</ScrollView>
</android.support.v4.widget.DrawerLayout>
But, with or without the ScrollView, the drawer just cuts items off at the bottom when they go beyond the end of the screen. I can't get any form of scrolling enabled. Not sure what I am missing or need to enable. Thoughts would be appreciated.
The LinearLayout in the DrawerLayout segment contains different styled views. One view displays title only with a divider below it, one displays an imageview with text next to it and another displays a title with a switch built into the row. So, multiple styled views need to be accounted for if done outside of XML coded layout files.

While using a ListView is a valid option, it was useful for me to attempt and resolve the situation for which I already had such a large XML file constructed for my layout in between the ScrollView above. As it turned out, there were only a few small modifications needed in order to get it working as intended. The latest layout file constructed is the following:
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/drawerLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/frameLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".mainScreen">
<!-- Layout of Activity -->
</FrameLayout>
<!-- DrawerLayout segment -->
<ScrollView
android:id="#+id/scrollView"
android:layout_width="260dp"
android:layout_height="match_parent"
android:layout_gravity="start|bottom"
android:layout_marginTop="?android:attr/actionBarSize">
<LinearLayout
android:id="#+id/drawerLinearLayout"
android:orientation="vertical"
android:layout_width="260dp"
android:layout_height="wrap_content"
android:divider="#android:color/transparent"
android:dividerHeight="0dp"
android:background="#77000000">
<!-- Layout of Drawer -->
</LinearLayout>
</ScrollView>
</android.support.v4.widget.DrawerLayout>
The main modifications required me to alter where the gravity and the margin existed. The gravity needed to be in the surrounding ScrollView otherwise it would cause odd behavior that didn't scroll or actually crashed in some instances apparently. Then the inner layout needed to be changed to 'wrap content'.
If the margin was not moved into the ScrollView as well, it apparently doesn't scroll down to the bottom. It left a margin of scroll unscrolled at the bottom. Once this was resolved, the DrawerLayout worked as was expected at this point. The ListView option also proposed is another approach to be used, but as mentioned at this point it was worth me analyzing it a bit further to re-use the code that I already had written; especially with several different custom views that would need to be handled inside the view.

It seems that it only works properly with a ListView. You will take less time to migrate to ListView than trying to make the ScrollView to work.

You should use a listview along with the frame layout. Something like this :
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout
android:id="#+id/frameLayout"
android:layout_width="match_parent"
android:layout_height="0dip"
android:layout_weight="1"/>
<ListView android:id="#+id/left_drawer"
android:layout_width="180dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:choiceMode="singleChoice"
android:divider="#android:color/transparent"
android:dividerHeight="0dp"
android:background="#111"/>
</android.support.v4.widget.DrawerLayout>
You can also refer to the Navigation Drawer documentation at developer.android.com. It has everything you will need.

Error in navigation drawer implementation

This is my xml file
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- As the main content view, the view below consumes the entire
space available using match_parent in both dimensions. -->
<FrameLayout
android:id="#+id/content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<!-- android:layout_gravity="start" tells DrawerLayout to treat
this as a sliding drawer on the left side for left-to-right
languages and on the right side for right-to-left languages.
The drawer is given a fixed width in dp and extends the full height of
the container. A solid background is used for contrast
with the content view. -->
<ListView
android:id="#+id/listView1"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:choiceMode="singleChoice"
android:divider="#android:color/transparent"
android:dividerHeight="0dp"
android:background="#111"/>
</android.support.v4.widget.DrawerLayout>
when try to run the project it crashed.. the error is
11-05 04:22:16.296: E/AndroidRuntime(1252): FATAL EXCEPTION: main
11-05 04:22:16.296: E/AndroidRuntime(1252): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.exaple.customadapter/com.exaple.customadapter.MainActivity}: android.view.InflateException: Binary XML file line #1: Error inflating class android.support.v4.widget.DrawerLayout
why this error comes? How to solve this.