问题一：
PlatformException (PlatformException(error, Unable to find explicit activity class {com.wodeer.xth2_mobile/com.yalantis.ucrop.UCropActivity}; have you declared this activity in your AndroidManifest.xml?, null))
解决办法：
- 在android/app/src/main/AndroidManifest.xml中添加
<activity
android:name="com.yalantis.ucrop.UCropActivity"
android:screenOrientation="portrait"
android:theme="@style/Theme.AppCompat.Light.NoActionBar"/>
问题二 vscode 调试 flutter debug 总是 Lost connection to device
解决办法：
- brew upgrade --fetch-HEAD usbmuxd
- 注：电脑硬盘不足也会报错
问题三 flutter键盘弹起布局报错问题
解决办法：
在原有的组件外面包一层SingleChildScrollView
ingleChildScrollView(
Container()
)
问题四 flutter打包apk是报：Execution failed for task ':app:compileReleaseKotlin'.
解决办法：
使用Android studio打开项目，选择File => Other Settings => Preferences for New Projects
点击下拉框 将 Kotlin to JVM 修改成 1.8
