ButterKnife 8.0.1 not working

Question

I am using butterknife 8.0.1, but a nullpointerexception is appearing.

This line is on my build.grade file: compile 'com.jakewharton:butterknife:8.0.1'

this is my Main Class: (I wrote the includes properly)

import butterknife.BindView;
import butterknife.ButterKnife;

public class MainActivity extends BaseActivity {

    @BindView(R.id.MainScreenTextView) TextView mainText;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ButterKnife.bind(this);

        **mainText.setText("Butter knife is working fine");**
    }

and this is MainActivity.xml:

<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="?attr/colorPrimary"
        app:popupTheme="@style/AppTheme.PopupOverlay" />

</android.support.design.widget.AppBarLayout>

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center_vertical"
    android:orientation="vertical">

    <TextView
        android:id="@+id/MainScreenTextView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="This is the Main Screen"
        android:textColor="#000000"
        android:background="#666666"
        android:padding="5dp"
        android:textSize="20dp"/>
</LinearLayout>

<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="bottom|end"
    android:layout_margin="@dimen/fab_margin"
    android:src="@android:drawable/ic_dialog_email" />

score 150 · Accepted Answer · answered May 03 '16 at 20:35

150

Per the readme, you need to include the butterknife-compiler in order for the generated code to be produced automatically:

buildscript {
  repositories {
    mavenCentral()
   }
  dependencies {
    classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
  }
}

apply plugin: 'com.neenbedankt.android-apt'

dependencies {
  compile 'com.jakewharton:butterknife:8.0.1'
  apt 'com.jakewharton:butterknife-compiler:8.0.1'
}

Without this there is no generated code to be loaded and thus none of the fields get set.

You can verify ButterKnife is working by calling ButterKnife.setDebug(true) and looking in Logcat.

answered May 03 '16 at 20:35

Jake Wharton

75,598
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Worked well for me also. This should be the accepted answer. – PaulT May 05 '16 at 18:57
1

I followed the same readme conditions but for mine its not working. its giving me this `Error:Gradle: Execution failed for task ':app:compileWholesaleDebugJava'. > java.lang.IllegalArgumentException: couldn't make a guess for com.sme.Activity.fragment.AccountStatementFragment` – Min2 May 24 '16 at 10:57
Use lowercase package names. Otherwise you'll need to wait for 8.1.0 where that bug is fixed. – Jake Wharton May 24 '16 at 15:41
Hi @JakeWharton When i add apply plugin: 'com.neenbedankt.android-apt' send me and error – josedlujan May 28 '16 at 00:38
2

why does the author make it so complex? – Kai Wang Jun 27 '16 at 19:14
Thx, Jake. Add this info to your mainpage "download". Many people will be bless you for this. – Shwarz Andrei Jun 30 '16 at 17:38
3

@KaiWang because to reduce Reflection in code so to increase execution speed by 30% – pratham kesarkar Jul 10 '16 at 22:04
@josedlujan you need to add classpath 'com.neenbedankt.gradle.plugins:android-apt:1.4' to build.grade file of your project not your App – pratham kesarkar Jul 10 '16 at 22:09
1

Still getting `NPA` – Kishore Jethava Jul 29 '16 at 17:12
Plugin with id 'com.android.application' not found. – umerk44 Aug 21 '16 at 20:55
Just these two dependencies are required compile'com.jakewharton:butterknife:8.0.1' annotationProcessor 'com.jakewharton:butterknife-compiler:8.0.1' – Jagdeep Singh Jan 11 '17 at 07:07
gradle please should also include annotation processor dependency .I messed up just cause it gave me single dependency. – pratham kesarkar Oct 22 '17 at 06:51

score 7 · Answer 2 · answered Oct 06 '16 at 19:18

7

I used this library in Fragment and has NPE. My code was:

ButterKnife.bind(view);

But it was wrong. Library need to know two objects:
1) Target - with annotations @BindView
2) Source - with views

It will be right to write:

ButterKnife.bind(this, view);

When this - your fragment, and view - view of this fragment.

answered Oct 06 '16 at 19:18

Dmitry

71
1
1

What if it is an activity? – Sreekanth Karumanaghat Dec 01 '17 at 13:27

score 6 · Answer 3 · answered Jul 28 '17 at 08:18

6

for me the problem was that I was using

annotationProcessor 'com.jakewharton:butterknife-compiler:8.7.0'

instead of

 apt 'com.jakewharton:butterknife-compiler:8.7.0

answered Jul 28 '17 at 08:18

SpyZip

5,511
4
32
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1

what's the difference? – bharal Jun 12 '18 at 23:17

V.Soni · Answer 4 · 2016-10-03T05:22:14.957

App Level(build.gradle)

apply plugin: 'android-apt'
dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    compile 'com.android.support:appcompat-v7:24.2.1'
    testCompile 'junit:junit:4.12'
    compile 'com.jakewharton:butterknife:8.4.0'
    apt 'com.jakewharton:butterknife-compiler:8.4.0'
}


Project Level(build.gradle)

buildscript {
    repositories {
        jcenter()
    }
    dependencies {

        classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

score 3 · Answer 5 · answered Mar 19 '18 at 09:16

3

Config Butterknife on build.gradle file like this,

compile("com.jakewharton:butterknife:8.5.1")
annotationProcessor "com.jakewharton:butterknife-compiler:8.5.1"

It works for me.

answered Mar 19 '18 at 09:16

Luna Kong

3,065
25
20

score 3 · Answer 6 · answered May 11 '19 at 15:55

3

If you use kotlin:

make sure to use this dependency in module app:

dependencies {
   implementation 'com.jakewharton:butterknife:10.0.0'
   kapt 'com.jakewharton:butterknife-compiler:10.0.0'
}

answered May 11 '19 at 15:55

Jetwiz

642
7
14

1

This was my issue. To add to this, even if you have zero kotlin code in your project but have used and then deleted Kotlin snippets, you will still run into an error unless the `kapt` line above is included. – PGMacDesign Sep 09 '19 at 18:27

score 2 · Answer 7 · answered Apr 04 '17 at 05:05

I had this issue too, just because I've added butterknife from Android Studio's Dependency management and not by copy-pasting gradle lines from Butterknife website. So I had to add compile 'com.jakewharton:butterknife:8.5.1' annotationProcessor 'com.jakewharton:butterknife-compiler:8.5.1' instead of just compile 'com.jakewharton:butterknife:8.5.1'

score 1 · Answer 8 · answered Jan 11 '23 at 21:22

So for an update to a previous answer. If you are using annotationProcessor like this

annotationProcessor 'com.jakewharton:butterknife-compiler:10.2.1'

change it up to this:

kapt 'com.jakewharton:butterknife-compiler:10.2.1'

it's kapt instead of apt as of 2023.

score 0 · Answer 9 · answered Feb 27 '17 at 08:13

From JakeWharton

Yes that plugin is no longer needed. You're already using annotationProcessor for the 'butterknife-compiler' artifact which is built-in to the Android Gradle plugin.

Then the solution is delete apt classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'

Chinthaka Devinda · Answer 10 · 2018-05-21T08:34:11.403

0

Add annotationProcessor 'com.jakewharton:butterknife-compiler:8.6.0' In your gradle file it worked for me

edited May 21 '18 at 08:34

answered May 25 '17 at 10:16

Chinthaka Devinda

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5
16
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score 0 · Answer 11 · answered Dec 14 '17 at 14:24

I have just faced this problem, after updating my project to Gradle version 3.0.1. I was able to fix it by just including in Gradle app file the line:

annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'

The final result was:

    dependencies {
        compile fileTree(include: ['*.jar'], dir: 'libs')
        androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
            exclude group: 'com.android.support', module: 'support-annotations'
        })

        ...

        compile 'com.jakewharton:butterknife:8.8.1'
        annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'
    }

I hope this helps somebody, although this question being old.

ButterKnife 8.0.1 not working

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