笔记

大约 2 分钟

笔记

安卓组件

编号组件描述
1Fragments表示Activity中的用户界面的一部分。
2Views在屏幕上绘制的UI元素，包括按钮，列表形式等
3Layouts查看控制屏幕格式和视图外观的层次结构。
4Intents消息连接组件在一起。
5Resources外部元素，如字符串，常量和可绘制图片。
6Manifest应用程序的配置文件。

manifest详解

Activity启动模式(launchMode)

android:launchMode="singleTop"

关于字体大小

  • 使用sp作为字体大小单位,会随着系统的字体大小改变
  • 而dp作为单位则不会.

设置颜色的几种方式

 basicTv.setTextColor(Color.GREEN)

basicTv.setTextColor(0xff00ff)
basicTv.setTextColor(Color.rgb(22,33,55))
basicTv.setTextColor(Color.argb(0,200,0,0))
basicTv.setTextColor(Color.parseColor("#00ff00"))

如果依赖下载不了

需要在根路径的setting.gradle添加

pluginManagement {
    repositories {
        gradlePluginPortal()
        google()
        mavenCentral()
        maven { url 'https://jitpack.io' }
    }
}
dependencyResolutionManagement {
    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
    repositories {
        google()
        mavenCentral()
        maven { url 'https://jitpack.io' }
    }
}

安卓打包修改名字

关于打包的定义

Make Project:- Means you create a real aplication which is working on device and has a executable file like apk.

Make Module:- means you create a library project for you aplication which is executed with that project and has no executable file like apk but has jar files which work as a library.

Build apk: when you normally run your application an apk file is generated locally which is like a zipfile and is easily unzipable no security is implemented and you can get the code from that apk file. It is used basically for local testing.

Signed apk: it is that apk you can create with a password and security and it is not easily unzipable and is used for production.

定义打包名称

    // 打包 用来打包修改名字的 跟defaultConfig是同一级的
    applicationVariants.all { variant ->
        variant.outputs.all { output -> // 这里和2.0的不一样 2.0是each 3.0是all
            def outputFile = output.outputFile
            def fileName;
            if (outputFile != null && outputFile.name.endsWith('.apk')) {
                if (variant.buildType.name.equals('release')) {
                    fileName = "[项目名]${releaseTime()}_${defaultConfig.versionName}_release.apk"
                } else if (variant.buildType.name.equals('debug')) {
                    fileName = "[项目名]${releaseTime()}_${defaultConfig.versionName}_debug.apk"
                }
                outputFileName = fileName // 这里和2.0不一样
            }
        }
    }

定义一个时间

//打包 打包版本需要的当前时间名字 跟 Android 是同一级的
def releaseTime() {
    //注意时间不对 请注意时区问题 时区在小时分钟的时候不一样
    return new Date().format("yyyy-MM-dd-HH-mm", TimeZone.getTimeZone("Asia/Shanghai"))
}