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:<ul><li>Gradle's dependency cache may be corrupt (this sometimes occurs after a network connection timeout.)
Re-download dependencies and sync project (requires network)</li><li>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)</li><li>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.</li></ul>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()
}
}
