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1.为什么ButterKnife.bind之后View依然为null

为什么ButterKnife.bind之后View依然为null

       apply plugin: 'com.android.application'

       android {

       compileSdkVersion

       buildToolsVersion ".0.0"

       defaultConfig {

       applicationId "com.administrator.demo"

       minSdkVersion

       targetSdkVersion

       versionCode 1

       versionName "1.0"

       }

       buildTypes {

       release {

       minifyEnabled false

       proguardFiles getDefaultProguardFile('proguard-android.txt'),面向源码 'proguard-rules.pro'

       }

       }

       }

       dependencies {

       compile fileTree(include: ['*.jar'], dir: 'libs')

       testCompile 'junit:junit:4.'

       compile files('libs/jsoup-1.9.2.jar')

       compile files('libs/Volley.jar')

       compile 'com.android.support:appcompat-v7:.4.0'

       compile 'com.jakewharton:butterknife:8.1.0'

       compile 'com.android.support:design:.4.0'

       compile 'com.cjj.materialrefeshlayout:library:1.3.0'

       compile 'com.android.support:support-v4:.4.0'

       debugCompile 'com.squareup.leakcanary:leakcanary-android:1.4-beta2'

       releaseCompile 'com.squareup.leakcanary:leakcanary-android-no-op:1.4-beta2'

       testCompile 'com.squareup.leakcanary:leakcanary-android-no-op:1.4-beta2'

       }

       è¿™æ˜¯æˆ‘çš„ build.gradle 里的内容