更新约束布局

Question

我不能安装约束布局和其他库一样CardView和RecyclerView的新版本

我的build.gradle文件：

apply plugin: 'com.android.application' 

android { 
compileSdkVersion 25 
buildToolsVersion "25.0.2" 
defaultConfig { 
    applicationId "com.example.radin.myapplication" 
    minSdkVersion 15 
    targetSdkVersion 25 
    versionCode 1 
    versionName "1.0" 
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" 
} 
buildTypes { 
    release { 
     minifyEnabled false 
     proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 
    } 
} 
} 

dependencies { 
compile fileTree(dir: 'libs', include: ['*.jar']) 
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', { 
    exclude group: 'com.android.support', module: 'support-annotations' 
}) 
    compile 'com.android.support:appcompat-v7:25.3.1' 
    compile 'com.android.support.constraint:constraint-layout:1.0.2' 
    compile 'com.android.support:cardview-v7' 
    compile 'com.android.support:recyclerview-v7' 
} 

我没有看到约束布局的新版本在我的SDK经理 Screen shot of my sdk Manager

当我点击安装库和同步项目没有任何反应Screen shot of my android studio

Answer 1

尝试点击安装库和同步工程和变化：

compile 'com.android.support.constraint:constraint-layout:1.0.2' 
compile 'com.android.support:cardview-v7' 
compile 'com.android.support:recyclerview-v7' 

到：

compile 'com.android.support.constraint:constraint-layout:1.0.2' 
compile 'com.android.support:recyclerview-v7:25.3.1' 
compile 'com.android.support:cardview-v7:25.3.1' 

而且从构建gradle这个文件中删除此：

androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', { 
    exclude group: 'com.android.support', module: 'support-annotations' 
})