java.lang.illegalStateException: Butterknife

Question

I am using butterknife to bind my views so when the activity start, the following exception is thrown

java.lang.RuntimeException: Unable to start activity ComponentInfo{..package name...}: java.lang.IllegalStateException: Required view 'l' with ID 2131558524 for field 'tabItem' and method 'check' was not found. If this view is optional add '@Nullable' (fields) or '@Optional' (methods) annotation.

Note: I have called Butterknife.bind(this) after setContentView(view) and this view is not optional

My Code

public class HandlingActivity extends AppCompatActivity {

@BindView(R.id.container_view)FrameLayout container;
@BindView(R.id.l)TabItem tabItem;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_handling);
    ButterKnife.bind(this);
}

@OnClick(R.id.l)void check(){
    StoriesFragment storiesFragment = new StoriesFragment();
    getSupportFragmentManager().beginTransaction().replace(R.id.container_view,storiesFragment).commit();
     }
}

Answer 1

It is possible if your TabItem is not ready, so try to use this while declaring variable and its respective onclick.

Taken reference from here

 @Nullable
 @BindView(R.id.l)TabItem tabItem;

 @Optional
 @OnClick(R.id.l)
  void check(){
     //method logic...
  }

Answer 2

1. check if you have put in build.gradle (module:app)

   dependencies {
   annotationProcessor 'com.jakewharton:butterknife-compiler:8.5.1'
   provided 'javax.annotation:jsr250-api:1.0'
   compile 'com.jakewharton:butterknife:8.5.1'
   
   }
   

2. check if your id's exists

3. try to add @OnClick(R.id.l)void check(View v){ ... }

Answer 3

I had similar error, it was due to wrong layout file was being inflated on the view which didnt have the field in question that was being reported in error.

Answer 4

In my case this error was because I was using two layouts for different versions:

• activity_login.xml

• activity_login.xml (v21)

I added a progressBar in activity_login.xml but...

I forgot to added to activity_login.xml (v21).

Answer 5

It's working for me after add the annotation @Optional to @Onclick in my Activity class:

@Optional
@OnClick({R.id.your_id_1, R.id.your_id_2})
public void onClick(View v) {
    switch (v.getId()) {
        case R.id.your_id_1:
            break;
        case R.id.your_id_2:
            break;
    }
}

Import the dependencies and bind your Activity:

import butterknife.ButterKnife;
import butterknife.OnClick;
import butterknife.Optional;

public class YourActivity extends AppCompatActivity {
    
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.your_layout);
        ButterKnife.bind(this);
    }
}

The Butter Knife GitHub README provides instructions:

To use Butter Knife in a library, add the plugin to your buildscript:

buildscript {
  repositories {
    mavenCentral()
   }
  dependencies {
    classpath 'com.jakewharton:butterknife-gradle-plugin:8.8.1'
  }
}

and to your app/build.gradle

android {
    compileSdkVersion 27
    buildToolsVersion '27.0.3'
    defaultConfig {
        applicationId 'your_app_id'
        minSdkVersion 16
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"

    }
}

dependencies {
        implementation 'com.jakewharton:butterknife:8.8.1'
        annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'
}