How to setup ButterKnife plugin in Android Studio?

问题:

I need to install the plugin Butter Knife. Where can I download it? I downloaded a .jar plugin (but not if the file is the one I need), I have installed but when I click on the option "generate" not the option to use butterknife appears. following a video tutorial I modified files Gradle build: I have them now as follows:

apply plugin: 'android-apt' apply plugin: 'com.android.application'   android {     compileSdkVersion rootProject.ext.compileSdkVersion     buildToolsVersion rootProject.ext.buildToolsVersion      defaultConfig {         applicationId "calcursoedxleccion0.cal"         minSdkVersion rootProject.ext.minSdkVersion         targetSdkVersion rootProject.ext.targetSdkVersion         versionCode 1         versionName "1.0"     }     buildTypes {         release {             minifyEnabled false             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'         }     } }  dependencies {     compile fileTree(dir: 'libs', include: ['*.jar'])     testCompile 'junit:junit:4.12'     compile "com.android.support:appcompat-v7:$rootProject.ext.supportLibraryVersion"     compile "com.android.support:recyclerview-v7:$rootProject.ext.supportLibraryVersion"     compile "com.android.support:support-v4:$rootProject.ext.supportLibraryVersion"     compile "com.android.support:design:$rootProject.ext.supportLibraryVersion"     // compile "com.jakewharton:butterknife:$rootProject.ext.butterKnifeVersion"     compile "com.jakewharton:butterknife:$rootProject.ext.butterKnifeVersion"      apt "com.jakewharton:butterknife-compiler:8.0.1" } 

and

// Top-level build file where you can add configuration options common to all sub-projects/modules.  buildscript {     repositories {         jcenter()         mavenCentral()     }     dependencies {         classpath 'com.android.tools.build:gradle:2.1.2'         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     } }  allprojects {     repositories {         jcenter()     } }  task clean(type: Delete) {     delete rootProject.buildDir }  ext{      minSdkVersion = 16     targetSdkVersion = 23     compileSdkVersion = 23     buildToolsVersion = '23.0.3'      supportLibraryVersion = '23.3.0'     butterKnifeVersion = '8.0.1' } 

Gradle to synchronize I get this error:

"The android android-library or plugin must be applied to the project" error (1.0)

What am I doing wrong?

回答1:

The easiest way to use ButterKnife library is to add this single line to your module-level build.gradle dependencies list:

dependencies {   compile 'com.jakewharton:butterknife:7.0.1' } 

You can then synchronize your project!

UPDATE 1

I just noticed Jake the Wharton has updated the library since the last time I used it! Now, it appears you have to add to two separate places:

In your project-level build.gradle file:

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

And lastly, in your module-level build.gradle file:

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

It is important that you add apply plugin: 'android-apt' to top of the module-level build.gradle file; most likely below the first line like this:

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

I have just tested this and works for me. Good luck!

UPDATE 2

Jake Wharton just released an update to the library and here is what you need to do in order to use it:

So, inside your build.gradle (app-level), add the following to your dependencies!

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

I hope this helps you!

回答2:

In Android Studio you can do this by:

1. Right-click your module
2. Click 'Open Module Settings'
3. Click Dependencies Tab
4. Click the green plus icon
5. Select 'Library Dependency' from the dropdown list
6. Enter "butterknife" in the search field and click the search button

After selecting the library, Android Studio adds the dependency to your module.

Since butterknife does annotation processing, you have to add this to the build.gradle of your module right after the compile statement for butterknife:

annotationProcessor 'com.jakewharton:butterknife-compiler:8.5.1'

where the version number at the end should match your version of butterknife.

文章来源: How to setup ButterKnife plugin in Android Studio?