Generate Signed APK出錯：java.util.zip.ZipException: duplicate entry: android/support/annotation/IntegerRes.class

移除app目錄libs下面的v4,v7包即可

需要在build.gradle app中新增如下內容

defaultConfig {
        ........//省略
        // Enabling multidex support. trying to fix
        multiDexEnabled true

    }
    //需要新增如下內容
    packagingOptions {
        exclude 'META-INF/DEPENDENCIES'
 

        exclude 'META-INF/LICENSE'
        exclude 'META-INF/LICENSE.txt'
        exclude 'META-INF/license.txt'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/NOTICE.txt'
        exclude 'META-INF/notice.txt'
        exclude 'META-INF/ASL2.0'
        exclude 'META-INF/services/javax.annotation.processing.Processor'
 

    }

獲取安卓應用簽名工具下載