在Android工作室添加外部JAR文件中的项目摇篮

我有一个可怕的时间增加一个外部JAR我在Android中的gradle工作室项目。我问过类似的问题这里但这些答案还没有为我工作。

I'm having a terrible time adding an external JAR to my gradle project in Android Studio. I asked a similar question here but those answers haven't worked for me.

我创建了一个库文件夹，并在里面加了我的JAR：

I created a libs folder and added my JAR in there:

~/android/MyProject/libs $ pwd
/Users/me/android/MyProject/libs
~/android/MyProject/libs $ ls
TestFlightLib.jar

和我添加在下面我的build.gradle

dependencies {
    compile fileTree(dir: 'libs', include: '*.jar')
}

做的这一切，我点击生成后 - ＆GT;重建项目，但仍然无法让我补充进口com.testflightapp.lib.TestFlight

After doing all this I clicked Build -> Rebuild project but that still doesn't let me add import com.testflightapp.lib.TestFlight

我也试过右键单击 TestFlightLib.jar 键，将其添加为一个模块的第二个解决方案。这让我补充进口com.testflightapp.lib.TestFlight 成功，但是当我运行项目我仍然得到错误：摇篮：错误：包com.testflightapp.lib不存在

I also tried the second solution of right clicking TestFlightLib.jar and adding it as a Module. This lets me add import com.testflightapp.lib.TestFlight successfully but when I Run the project I still get the error: Gradle: error: package com.testflightapp.lib does not exist

我是什么做错了吗？

我怎么能只是一个外部JAR添加到我的项目的gradle？

How can I simply add an external JAR to my gradle project?