vault backup: 2025-07-22 22:14:08

Affected files: Too many files to list
2025-07-22 22:14:08 +08:00
parent 99f67788fc
commit 5d4e261181
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-## Build AOSP
-### Build compile environment
-1. Install Ubuntu 18.04
-2. Install packages: `sudo apt-get install git-core gnupg flex bison build-essential zip curl zlib1g-dev gcc-multilib g++-multilib libc6-dev-i386 lib32ncurses5-dev x11proto-core-dev libx11-dev lib32z1-dev libgl1-mesa-dev libxml2-utils xsltproc unzip fontconfig`
-    - https://source.android.com/setup/build/initializing
-3. Install Repo
-    ```
-    mkdir ~/bin
-    PATH=~/bin:$PATH
-    curl https://storage.googleapis.com/git-repo-downloads/repo > ~/bin/repo ;\
-    chmod a+x ~/bin/repo ;\
-    gpg --recv-key 8BB9AD793E8E6153AF0F9A4416530D5E920F5C65 ;\
-    curl https://storage.googleapis.com/git-repo-downloads/repo.asc | gpg --verify - ~/bin/repo
-    ```
-   - https://source.android.com/setup/develop#installing-repo
-4. Download AOSP source
-    1. Create folder for AOSP
-        ```
-        mkdir -p ~/codes/aosp ; cd ~/codes/aosp
-        ```   
-    2. Setup git
-        ```
-        git config --global user.name AwinHuang ;\
-        git config --global user.email awinhuang@gmail.com
-        ```
-    3. Download source code
-        ```
-        repo init -u https://android.googlesource.com/platform/manifest ;\
-        repo sync -j8
-        ```
-        - 如果要切換某一個特定版本可以使用`-b`，例如：`repo init -u https://android.googlesource.com/platform/manifest -b android-10.0.0_r47`。
-        - 要知道版本tag可以查看：https://source.android.com/setup/start/build-numbers#source-code-tags-and-builds
-5. Build code
-    ```
-    source build/envsetup.sh ;\
-    lunch aosp_arm-eng ;\
-    make clobber  ;\
-    make -j16
-    ```
-    - `make clobber`用來刪除build資料夾
-
-### Reference 
- [GitHub - henrymorgen/android-knowledge-system: Android应用开发最强原创知识体系](https://github.com/henrymorgen/android-knowledge-system)
- [Android AOSP基础（二）AOSP源码和内核源码下载 | BATcoder - 刘望舒](http://liuwangshu.cn/framework/aosp/2-download-aosp.html)
- [Android AOSP基础（三）Android系统源码的整编和单编 | BATcoder - 刘望舒](http://liuwangshu.cn/framework/aosp/3-compiling-aosp.html)
-
-## Build kernel
-1. Download the code
-    ```
-    mkdir -p ~/codes/kernel ;\
-    cd ~/codes/kernel ;\
-    repo init -u https://android.googlesource.com/kernel/manifest ;\
-    repo sync -j16
-    ```
-
-2. Compile
-    ```
-    build/build.sh
-    ```
-    - 如果遇到`Command 'java' not found, but can be installed with:`
-        - 依序安裝
-            - `sudo apt install default-jre`
-            - `sudo apt install openjdk-11-jre-headless`
-            - `sudo apt install openjdk-8-jre-headless`
-        - 執行 `sudo update-alternatives --config java`
-            - 選擇 `/usr/lib/jvm/java-11-openjdk-amd64/bin/java`
-        - 再次compile
-            - `source build/envsetup.sh`
-            - `mm idegen`
-
-3. 產生android.iml和android.ipr
-    在source code跟目錄下執行：`development/tools/idegen/idegen.sh`
-
-### Reference 
- [Android kernel源码下载与编译](https://blog.csdn.net/u010164190/article/details/106561022)
-
-
-## Android App programming
- R的全名：`<PACKAGE_NAME> + .R`，例如package name是`com.awin.testapp`，那全名是`com.awin.testapp.R`。
- AndroidX = Android eXtension
- Layout
-    - layout_margin: 物件與其他物件的距離
-    - layout_gravity: 物件在容器內的位置（靠左、靠右、置中...）
-    - textApperance: 字型大小
- Extensions
-    - Android 4.1 沒有自動加入的extension
-    - 打開build.gradle，在`plugins`區塊中加入：
-        ```
-        id 'kotlin-kapt'  
-        id 'kotlin-android-extensions'
-        ```
-
- 使用ViewModel & LiveData
-    - 確認有 `kotlin-kapt` 這個plugin。
-      ![[Pasted image 20210330102148.png]]
-    - [Android jetpack所有library](https://developer.android.com/jetpack/androidx/explorer)
-    - [Android jetpack - Lifecycle](https://developer.android.com/jetpack/androidx/releases/lifecycle)
-    - 從`Declaring dependencies`這區塊複製必要的module
-      ![[Pasted image 20210330110411.png]]
-      ```
-      def lifecycle_version = "2.3.1"
-
-      // ViewModel
-      implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle_version"
-      // LiveData
-      implementation "androidx.lifecycle:lifecycle-livedata-ktx:$lifecycle_version"
-      // Annotation processor
-      kapt "androidx.lifecycle:lifecycle-compiler:$lifecycle_version"
-      ```
-      
-    - Create a ViewModel
-      ```kotlin
-      viewModel = ViewModelProvider(this).get(GuessViewModel::class.java)
-      ```
-      
-    - Observe a live data in ViewModel
-      ```kotlin
-      viewModel.counter.observe(this, Observer {
-          counter.setText(it.toString())
-      })
-      ```
-      counter這個變數是包含在ViewModel裡面的live data，我們的資料則是放在counter裡面的「value」。
-      所以如果要取用我們的data，則是：`viewModel.counter.value`。
-      
- 使用LiveData
-    - `val counter = MutableLiveData<Int>()`
-
-### Use ViewBinding
-ViewBinding is used to replace Kotlin Synthetics.
-1. 在`app/build.gradle`中加入：
-    ```
-    plugins {  
-        ...
-        id 'kotlin-parcelize'  <-- Add this
-    }
-    
-    android {
-        ...
-        buildFeatures {        <-- Add this
-            viewBinding true
-        }
-        ...
-    }
-    ```
-2. 在你的activity裡面
-    1. `import <APP_DOMAIN_NAME>.databinding.<ACTIVITY_NAME>Binding`
-        假如：APP_DOMAIN_NAME是`com.example.testmultisectioncyclerview`，ACTIVITY_NAME是`ActivityMain`，那就是：
-        `import com.example.testmultisectioncyclerview.databinding.ActivityMainBinding`
-    2. 用`lateinit`宣告一個變數，變數名稱是activity的名字加上binding，例如`ActivityMain`就是：
-        `private lateinit var activityBinding: ActivityMainBinding`
-    3. 在`onCreate()`中，就可以用`activityBinding`來取得view與其他元件了：
-        ```
-        activityBinding = ActivityMainBinding.inflate(layoutInflater)
-        setContentView(activityBinding.root) <-- root就是view
-        ```
-
-## ADB usage
- [如何透過 adb command line 指令啟動 Android App](https://kkboxsqa.wordpress.com/2014/08/20/%E5%A6%82%E4%BD%95%E9%80%8F%E9%81%8E-adb-command-line-%E6%8C%87%E4%BB%A4%E5%95%9F%E5%8B%95-android-app/)
-
-# MISC
-## 教學文
- [Android Template 小技巧 及 寫程式常見的問題](https://www.eeaseries.com/2021/01/android-template.html?m=1)
- [Jetpack Compose 基础知识](https://developers.google.com/codelabs/jetpack-compose-basics?hl=zh-cn#0)
- [一文带你了解适配Android 11分区存储](https://zhuanlan.zhihu.com/p/354632087)