Error inflating class android.support.design.widge

问题:

My app crashed because

Error inflating class android.support.design.widget.FloatingActionButton

This is my code in the XML

<android.support.design.widget.FloatingActionButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|right"
        android:layout_margin="16dp"
        android:src="@drawable/icon_right"
        app:backgroundTint="@color/green"
        android:onClick="previewphoto"
        app:layout_anchorGravity="bottom|right|end" />

and here is my gradle

compile 'com.android.support:appcompat-v7:23.4.0' // appcompat library
compile 'com.android.support:design:23.4.0'

my logcat

FATAL EXCEPTION: main Process: com.cyanlabsid.cetakphoto, PID: 15298 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.cyanlabsid.cetakphoto/com.cyanlabsid.cetakphoto.PhotoPicker}: android.view.InflateException: Binary XML file line #76: Binary XML file line #76: Error inflating class android.support.design.widget.FloatingActionButton at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2423) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2483) at android.app.ActivityThread.access$900(ActivityThread.java:153) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1349) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5441) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:738) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:628) Caused by: android.view.InflateException: Binary XML file line #76: Binary XML file line #76: Error inflating class android.support.design.widget.FloatingActionButton at android.view.LayoutInflater.inflate(LayoutInflater.java:543) at android.view.LayoutInflater.inflate(LayoutInflater.java:427) at android.view.LayoutInflater.inflate(LayoutInflater.java:374) at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:284) at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140) at com.cyanlabsid.cetakphoto.PhotoPicker.onCreate(PhotoPicker.java:74) at android.app.Activity.performCreate(Activity.java:6303) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2376) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2483)  at android.app.ActivityThread.access$900(ActivityThread.java:153)  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1349)  at android.os.Handler.dispatchMessage(Handler.java:102)  at android.os.Looper.loop(Looper.java:148)  at android.app.ActivityThread.main(ActivityThread.java:5441)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:738)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:628)

Can somebody tell my fault?

回答1:

Tried your code, the problem is with the 23.4.0 library.

Upgrade to 24.+ , there's no error in that lib.

For example :

implementation 'com.android.support:appcompat-v7:24.2.1' // appcompat library
implementation 'com.android.support:design:24.2.1'

You need to change the compile version to 24 too.

compileSdkVersion 24

回答2:

Use

app:backgroundTint

in stead of

android:backgroundTint

Hope it will work.

回答3:

Because android:backgroundTint doesn't work below android API 21, so you need to use app:backgroundTint instead.

回答4:

Below API level 21 app versions not support for the

app:backgroundTint="@color/green"

or you can use this library for achieve more material design widgets.

https://github.com/navasmdc/MaterialDesignLibrary

happy coding...

回答5:

You need to add

android:theme="@style/Theme.AppCompat"

in the XML_Layout file in which you are using FloatingActionButton...

回答6:

I had the same problem

I faced the same issue with Pre-Lolipop version and to resolve it, I just changed "android:src" to "app:srcCompat" & it worked for me.

To make compatibility with older version and if you're using a Vector graphics (as drawable assets) you should use:

app:srcCompat="@drawable/you_graphics"

instead of:

android:src="@drawable/your_graphics"

回答7:

I am using:

classpath 'com.android.tools.build:gradle:3.3.2'

and

distributionUrl=https://services.gradle.org/distributions/gradle-4.10.1-all.zip

I changed my XML to:

<com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="16dp"
        android:clickable="true"
        android:focusable="true"
        app:srcCompat="@drawable/mapit"
        app:layout_anchor="@id/foundit_imageView"
        app:layout_anchorGravity="bottom|right|end" />

and everything built and ran correctly.

I hope this helps

回答8:

Make sure the library from which you declared the FloatingActionButton in the activity is the same as the one used for the layout markup

For example have

import com.google.android.material.floatingactionbutton.FloatingActionButton; in the activity and com.google.android.material.floatingactionbutton.FloatingActionButton as the tag for the layout

回答9:

use this code it will be work better ;

<android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentBottom="true"
        android:layout_margin="16dp"
        app:backgroundTint="#f9fcfc"

        android:src="@drawable/chat_float"
        tools:targetApi="lollipop" />

回答10:

 <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="end|bottom"
        android:src="@drawable/ic_add_foreground"
        android:layout_margin="16dp" />

Use this

 <com.google.android.material.floatingactionbutton.FloatingActionButton>

instead of

<android.support.design.widget.FloatingActionButton>