无法解析配置“：app：_debugCompile”的所有依赖项

我正在尝试在我的 Android 应用程序上使用 Google 地图。我安装了 Google Play 服务并获取了 API 密钥。我不明白为什么我会收到此错误消息！我认为它抱怨以下内容。

    <meta-data
        android:name="com.google.android.gms.version"
        android:value="@integer/google_play_services_version" />

错误信息：

  Error:A problem occurred configuring project ':app'.
    > Could not resolve all dependencies for configuration ':app:_debugCompile'.
       > Could not find com.android.support:support-v4:22.0.0.
         Searched in the following locations:
             https://jcenter.bintray.com/com/android/support/support-v4/22.0.0/support-v4-22.0.0.pom
             https://jcenter.bintray.com/com/android/support/support-v4/22.0.0/support-v4-22.0.0.aar
             file:/C:/Users/Ammar/AppData/Local/Android/Sdk/extras/android/m2repository/com/android/support/support-v4/22.0.0/support-v4-22.0.0.pom
             file:/C:/Users/Ammar/AppData/Local/Android/Sdk/extras/android/m2repository/com/android/support/support-v4/22.0.0/support-v4-22.0.0.aar
             file:/C:/Users/Ammar/AppData/Local/Android/Sdk/extras/google/m2repository/com/android/support/support-v4/22.0.0/support-v4-22.0.0.pom
             file:/C:/Users/Ammar/AppData/Local/Android/Sdk/extras/google/m2repository/com/android/support/support-v4/22.0.0/support-v4-22.0.0.aar
         Required by:
             Client:app:unspecified > com.android.support:appcompat-v7:21.0.3
       > Could not find com.android.support:support-v4:22.0.0.
         Searched in the following locations:
             https://jcenter.bintray.com/com/android/support/support-v4/22.0.0/support-v4-22.0.0.pom
             https://jcenter.bintray.com/com/android/support/support-v4/22.0.0/support-v4-22.0.0.aar
             file:/C:/Users/Ammar/AppData/Local/Android/Sdk/extras/android/m2repository/com/android/support/support-v4/22.0.0/support-v4-22.0.0.pom
             file:/C:/Users/Ammar/AppData/Local/Android/Sdk/extras/android/m2repository/com/android/support/support-v4/22.0.0/support-v4-22.0.0.aar
             file:/C:/Users/Ammar/AppData/Local/Android/Sdk/extras/google/m2repository/com/android/support/support-v4/22.0.0/support-v4-22.0.0.pom
             file:/C:/Users/Ammar/AppData/Local/Android/Sdk/extras/google/m2repository/com/android/support/support-v4/22.0.0/support-v4-22.0.0.aar
         Required by:
             Client:app:unspecified > com.google.android.gms:play-services:7.0.0 > com.google.android.gms:play-services-base:7.0.0

显然它正在寻找 v4 (com.android.support:support-v4) jar。你的构建路径中有它吗？

对于 android studio，在你的 gradle 文件中dependencies块，添加以下行-

dependencies {
    compile 'com.android.support:support-v4:22.0.+'
    // your other dependencies as well

}

并确保您已通过 SDK 管理器下载了 Android 支持库。如果您还没有，请参阅官方文档支持库设置 https://developer.android.com/tools/support-library/setup.html