【cocos源码学习】解决cocos2d-x-4.0 Android Demo构建遇到的问题

环境

• 硬件：macbook pro 四核Intel Core i7
• 系统：macOS Big Sur 11.4.2、 xcode Version 13.1 、cmake 3.20.5
• 软件：iterm2 Build 3.4.8、zsh 5.8、Android Studio Dolphin | 2021.3.1
• cocos2d-x v4 ：
  官方下载压缩包 http://cocos2d-x.org/filedown/cocos2d-x-v4.0

前提

1、正确安装并配置好了cocos工具集
2、用cocos命令创建一个GameDemo
用如下步骤创建了Demo

# luogw @ ericluodeMacBook-Pro in ~/study/cocos/localCreateDemo [18:29:01]
$ pwd
/Users/luogw/study/cocos/localCreateDemo
$ cocos new AndGame -p com.luo.game -l cpp -d .
$ cd AndGame
$ mkdir build
$ cd build
$ cocos run --proj-dir .. -p android

在最后一步会遇到（要实际解决这个问题可能要去研究cocos命令的源码了吧）

然后我们去创建的工程目录的proj.android看一下

如上所示，看起来是一个很完整的Android工程，用AS打开去编译看一下

遇到问题

用AS直接打开尝试构建会遇到如下三个问题

1、cvc-complex-type.2.4.a: 发现了以元素 ‘base-extension‘ 开头的无效内容。应以 ‘{layoutlib}‘ 之一开头
2、ERROR: Minimum supported Gradle version is 5.4.1. Current version is 5.1.1.
3、No toolchains found in the NDK toolchains folder for ABI with prefix: arm-linux-androideabi

以过往的经验该要升级gradle版本、ndk版本了

解决方案

1、升级gradle版本
2、配置ndkversion

diff文件的内容如下（把该如下内容copy到一个文件文件，然后用patch命令给Demo打上aptch）

diff --git a/cocos2d/cocos/platform/android/libcocos2dx-with-controller/build.gradle b/cocos2d/cocos/platform/android/libcocos2dx-with-controller/build.gradle
index 94f3dd4..399a3fb 100644
--- a/cocos2d/cocos/platform/android/libcocos2dx-with-controller/build.gradle
+++ b/cocos2d/cocos/platform/android/libcocos2dx-with-controller/build.gradle
@@ -2,6 +2,7 @@ apply plugin: 'com.android.library'

 android {
     compileSdkVersion PROP_COMPILE_SDK_VERSION.toInteger()
+    ndkVersion "21.3.6528147"

     defaultConfig {
         minSdkVersion PROP_MIN_SDK_VERSION
diff --git a/cocos2d/cocos/platform/android/libcocos2dx/build.gradle b/cocos2d/cocos/platform/android/libcocos2dx/build.gradle
index 44f9a32..50f198b 100644
--- a/cocos2d/cocos/platform/android/libcocos2dx/build.gradle
+++ b/cocos2d/cocos/platform/android/libcocos2dx/build.gradle
@@ -3,6 +3,8 @@ apply plugin: 'com.android.library'
 android {
     compileSdkVersion PROP_COMPILE_SDK_VERSION.toInteger()

+    ndkVersion "21.3.6528147"
+
     defaultConfig {
         minSdkVersion PROP_MIN_SDK_VERSION
         targetSdkVersion PROP_TARGET_SDK_VERSION
diff --git a/proj.android/app/build.gradle b/proj.android/app/build.gradle
index e91e946..db95423 100644
--- a/proj.android/app/build.gradle
+++ b/proj.android/app/build.gradle
@@ -4,7 +4,7 @@ apply plugin: 'com.android.application'

 android {
     compileSdkVersion PROP_COMPILE_SDK_VERSION.toInteger()
-
+    ndkVersion "21.3.6528147"
     defaultConfig {
         applicationId "com.luo.game"
         minSdkVersion PROP_MIN_SDK_VERSION
diff --git a/proj.android/build.gradle b/proj.android/build.gradle
index 5dff94d..fbce19f 100644
--- a/proj.android/build.gradle
+++ b/proj.android/build.gradle
@@ -7,7 +7,7 @@ buildscript {
     }

     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.0'
+        classpath 'com.android.tools.build:gradle:3.5.0'

         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
diff --git a/proj.android/gradle/wrapper/gradle-wrapper.properties b/proj.android/gradle/wrapper/gradle-wrapper.properties
index 8e341b7..02471c8 100644
--- a/proj.android/gradle/wrapper/gradle-wrapper.properties
+++ b/proj.android/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.1.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-bin.zip

最终构建

同步工程OK，直接run
后续就一路畅通，enjoy…

手机上的Demo运行效果