Android开发——AS编译失败，Invoke-customs are only supported starting with Android O

最近在开发当中遇到了一个编译失败的错误，记录一下。

错误片段

om.android.tools.r8.a: Invoke-customs are only supported starting with Android O (--min-api 26)
	at com.android.tools.r8.dex.r.a(:291)
	at com.android.tools.r8.dex.r.a(:98)
	at com.android.tools.r8.dex.r.b(:188)
	at com.android.tools.r8.dex.b.a(:63)
	at com.google.common.util.concurrent.TrustedListenableFutureTask$TrustedFutureInterruptibleTask.runInterruptibly(TrustedListenableFutureTask.java:125)
	at com.google.common.util.concurrent.InterruptibleTask.run(InterruptibleTask.java:69)
	at com.google.common.util.concurrent.TrustedListenableFutureTask.run(TrustedListenableFutureTask.java:78)
	at com.google.common.util.concurrent.MoreExecutors$DirectExecutorService.execute(MoreExecutors.java:322)
	at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134)
	at com.google.common.util.concurrent.AbstractListeningExecutorService.submit(AbstractListeningExecutorService.java:66)
	at com.google.common.util.concurrent.AbstractListeningExecutorService.submit(AbstractListeningExecutorService.java:36)
	at com.android.tools.r8.dex.b.b(:46)
	at com.android.tools.r8.D8.d(:92)
	at com.android.tools.r8.D8.b(:1)
	at com.android.tools.r8.utils.W.a(:30)
	at com.android.tools.r8.D8.run(:11)
	....

修正错误方法

在运行的app的build.gradle文件当中加入下面语句

android{
	compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

这是由于之前加入某个依赖，必须支持Java导致的错误。