ButterKnife 8.0.1 not working
Solution 1
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.
Solution 2
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.
Solution 3
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
Solution 4
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
}
}
Solution 5
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.
Sebastian Corradi
Linkedin profile: https://www.linkedin.com/in/sebastoian Bacherlor's Degree in Systems Analysis. Passionate in everything I do, I like to learn new things, met new people and cultures. By Day: Android Developer By Afternoon: Gym fan. By Night: Percussionist That's it
Updated on March 24, 2021Comments
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Sebastian Corradi about 3 years
I am using
butterknife 8.0.1
, but anullpointerexception
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" />