Android stuio在MainActivity中運行java的main方法

1:還是按照之前Android的項目配置

2:在local.properties中配置自己的sdk

（我的是mac）
#Thu May 28 16:49:10 CST 2020
sdk.dir=/Users/menglong/Library/Android/sdk

3:在 ideal/grad le.xml的<GradleProjectSettings>標籤中配置<option name="delegatedBuild" value="false" />這行

如：

<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
  <component name="GradleMigrationSettings" migrationVersion="1" />
  <component name="GradleSettings">
    <option name="linkedExternalProjectsSettings">
      <GradleProjectSettings>
        <option name="testRunner" value="PLATFORM" />
        <option name="distributionType" value="DEFAULT_WRAPPED" />
        <option name="externalProjectPath" value="$PROJECT_DIR$" />
        <option name="delegatedBuild" value="false" />
        <option name="modules">
          <set>
            <option value="$PROJECT_DIR$" />
            <option value="$PROJECT_DIR$/app" />
            <option value="$PROJECT_DIR$/lib" />
          </set>
        </option>
        <option name="resolveModulePerSourceSet" value="false" />
      </GradleProjectSettings>
    </option>
  </component>
</project>

完事