ButterKnife随笔

ButterKnife是很好用的一个三方注入依赖包。

使用Butterknife时可能会出现NullPointerException

如下为参考解决方案：

buildscript {

repositories {

google()

jcenter()

}

dependencies {

    classpath'com.android.tools.build:gradle:3.0.1'

    classpath'com.jakewharton:butterknife-gradle-plugin:8.5.1'

        // NOTE: Do not place your application dependencies here; they belong

// in the individual module build.gradle files

    }

}

然后在app中build.gradle中添加：

applyplugin:'com.jakewharton.butterknife'

在dependencies中添加

implementation'com.jakewharton:butterknife:8.5.1'

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

gradle版本改为了4.1

distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip

这是低版本butterknife 8.5.1高于这个版本会出错

把butterknife版本设为8.8.1，在gradle sync过程就会出错：

Unable to find method 'com.android.build.gradle.api.BaseVariant.getOutputs()Ljava/util/List;'.

Possible causes for this unexpected error include:

• Gradle's dependency cache may be corrupt (this sometimes occurs after a network connection timeout.)

  Re-download dependencies and sync project (requires network)

• The state of a Gradle build process (daemon) may be corrupt. Stopping all Gradle daemons may solve this problem.

  Stop Gradle build processes (requires restart)

• Your project may be using a third-party plugin which is not compatible with the other plugins in the project or the version of Gradle requested by the project.

In the case of corrupt Gradle processes, you can also try closing the IDE and then killing all Java processes.

修改方法：

buildscript {

repositories {

maven { url'https://oss.sonatype.org/content/repositories/snapshots' }

google()

jcenter()

}

dependencies {

classpath'com.android.tools.build:gradle:3.1.3'

        classpath'com.jakewharton:butterknife-gradle-plugin:9.0.0-SNAPSHOT'

        // NOTE: Do not place your application dependencies here; they belong

// in the individual module build.gradle files

    }

}

allprojects {

repositories {

maven { url'https://oss.sonatype.org/content/repositories/snapshots' }

google()

jcenter()

}

}