移动开发问题

Error:Execution failed for task #39;:app:transformClassesWithDexForDebug#39;(错误:任务“:app:transformClassesWithDexForDebug执行失败)
Failed to resolve: com.google.firebase:firebase-core:11.2.0(无法解决:com.google.firebase:firebase-core:11.2.0)
How to disable gradle #39;offline mode#39; in android studio?(如何在 android studio 中禁用 gradle 离线模式?)
Error:com.android.tools.aapt2.Aapt2Exception: AAPT2 error: check logs for details(错误:com.android.tools.aapt2.Aapt2Exception:AAPT2 错误:查看日志了解详细信息)
java.util.zip.ZipException: duplicate entry during packageAllDebugClassesForMultiDex(java.util.zip.ZipException:packageAllDebugClassesForMultiDex 期间出现重复条目)
Failed to resolve: com.android.support:appcompat-v7:26.0.0(无法解决:com.android.support:appcompat-v7:26.0.0)
Android studio adds unwanted permission after running application on real device(Android Studio 在真实设备上运行应用程序后添加了不需要的权限)
FireStore - how to get around array quot;does-not-containquot; queries(FireStore - 如何绕过数组“不包含查询)
Firebase date range query to fetch documents that have starDate and endDate(Firebase 日期范围查询以获取具有 starDate 和 endDate 的文档)
Query nested data from Firebase Real-time database Android(从 Firebase 实时数据库 Android 查询嵌套数据)
Retrieving data from Firebase Realtime Database in Android(从 Android 中的 Firebase 实时数据库中检索数据)
AutoComplete TextView with Contacts(带有联系人的自动完成 TextView)