Gradle 以非零退出值 1 结束(ic_launcher.png:错误:重复文件)

我在使用 gradle 时遇到了这个奇怪的错误，请帮帮我！

I got this strange error with gradle, please help me!

/.../app/build/intermediates/res/debug/drawable-xxhdpi-v4/ic_launcher.png:
    error: Duplicate file
/.../app/build/intermediates/res/debug/drawable-xxhdpi/ic_launcher.png:
    Original is here. The version qualifier may be implied.
Error:Execution failed for task ':app:processDebugResources'.
com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException:
Process 'command '/.../sdk/build-tools/22.0.1/aapt'' finished with non-zero exit value 1

之前它运行正常，但由于我把classpath com.android.tools.build:gradle:1.2.2，这导致了我的错误

Before it was operating normally, but since I put classpath com.android.tools.build:gradle:1.2.2, this causes me errors