[移动开发]Flutter_Boost 实战 - 1、环境配置

开发环境：
mac OS：11.4 Big Sur
JDK：11.0.14 下载地址 亲测1.8版本会报异常
Andriod Stdio：3.6.3 下载地址
Flutter：2.5.3 下载地址 注意不要下载最新版会有坑，见issues 1451

1. 配置flutter+andriod开发环境：
   1.1 解压后配置环境变量。
   1.2 执行flutter doctor。检测环境配置。
   1.3 Andriod Stdio安装Flutter插件。
2. 创建Andriod空项目，测试空项目启动。
3. 在项目下，新增flutter module。
   3.1 找到 flutter_module/pubspec.yaml 目录，在dependencies下配置flutter_boost。

   dependencies:
     flutter:
   	sdk: flutter
     flutter_boost:
   	git:
     	  url: 'https://github.com/alibaba/flutter_boost.git'
         ref: 'v3.0-release.1'
     cupertino_icons: ^1.0.2
   

   3.2 在flutter_module目录下执行：flutter build apk 命令。会发生以下异常
   
   这是由于新版本的flutter 改动了api的原因，导致attachToActivity里面的参数转换出错；

void attachToActivity(
      @NonNull ExclusiveAppComponent<Activity> exclusiveActivity, @NonNull Lifecycle lifecycle);

flutterboost官方给出的临时解决方案如下：

diff --git a/android/src/main/java/com/idlefish/flutterboost/containers/FlutterBoostActivity.java b/android/src/main/java/com/idlefish/flutterboost/containers/FlutterBoostActivity.java
index ab28533..1608eb5 100644
--- a/android/src/main/java/com/idlefish/flutterboost/containers/FlutterBoostActivity.java
+++ b/android/src/main/java/com/idlefish/flutterboost/containers/FlutterBoostActivity.java
@@ -152,7 +152,7 @@ public class FlutterBoostActivity extends FlutterActivity implements FlutterView
     private void performAttach() {
         if (!isAttached) {
             // Attach plugins to the activity.
-            getFlutterEngine().getActivityControlSurface().attachToActivity(getActivity(), getLifecycle());
+            getFlutterEngine().getActivityControlSurface().attachToActivity(delegate, getLifecycle());
 
             if (platformPlugin == null) {
                 platformPlugin = new PlatformPlugin(getActivity(), getFlutterEngine().getPlatformChannel());
diff --git a/android/src/main/java/com/idlefish/flutterboost/containers/FlutterBoostFragment.java b/android/src/main/java/com/idlefish/flutterboost/containers/FlutterBoostFragment.java
index b4ead66..5f954e6 100644
--- a/android/src/main/java/com/idlefish/flutterboost/containers/FlutterBoostFragment.java
+++ b/android/src/main/java/com/idlefish/flutterboost/containers/FlutterBoostFragment.java
@@ -43,6 +43,17 @@ public class FlutterBoostFragment extends FlutterFragment implements FlutterView
     private boolean isAttached = false;
     private boolean isFinishing = false;
 
+    class FakeExclusiveAppComponent implements io.flutter.embedding.android.ExclusiveAppComponent<Activity> {
+        public void detachFromFlutterEngine() {
+            // do nothing.
+        }
+
+        public Activity getAppComponent() {
+            return getActivity();
+        }
+    }
+    private FakeExclusiveAppComponent fakeAppComponent = new FakeExclusiveAppComponent();
+
     // @Override
     public void detachFromFlutterEngine() {
         /**
@@ -303,7 +314,7 @@ public class FlutterBoostFragment extends FlutterFragment implements FlutterView
     private void performAttach() {
         if (!isAttached) {
             // Attach plugins to the activity.
-            getFlutterEngine().getActivityControlSurface().attachToActivity(getActivity(), getLifecycle());
+            getFlutterEngine().getActivityControlSurface().attachToActivity(fakeAppComponent, getLifecycle());
 
             if (platformPlugin == null) {
                 platformPlugin = new PlatformPlugin(getActivity(), getFlutterEngine().getPlatformChannel());

简化下就是：

FlutterBoostActivity中：

//getFlutterEngine().getActivityControlSurface().attachToActivity(getActivity(), getLifecycle());
getFlutterEngine().getActivityControlSurface().attachToActivity(delegate, getLifecycle());

FlutterBoostFragment中：

//getFlutterEngine().getActivityControlSurface().attachToActivity(getActivity(), getLifecycle());
getFlutterEngine().getActivityControlSurface().attachToActivity(fakeAppComponent, getLifecycle());

class FakeExclusiveAppComponent implements io.flutter.embedding.android.ExclusiveAppComponent<Activity> {
        public void detachFromFlutterEngine() {}
 
        public Activity getAppComponent() {
                return getActivity();
        }
    }
private FakeExclusiveAppComponent fakeAppComponent = new FakeExclusiveAppComponent();

FlutterTextureHooker 中：

//flutterRenderer.startRenderingToSurface(surface);
flutterRenderer.startRenderingToSurface(surface,false);

再次执行，flutter build apk 出现：Built build/host/outputs/apk/release/app-release.apk (18.0MB). 编译成功。

4. 回到AndriodStdio打开目录，将flutter_boost加入到app中。
   
   
   
   配置SDK和NDK