BUG记录

IllegalStateException: ViewPager2 does not support direct child views
记录一下ViewPager2 加载Fragment fragment布局包含ViewPager直接就崩
FragmentManager 参数用getChildFragmentManager()
viewPager.setAdapter(new FragmentPagerAdapter(getChildFragmentManager(),BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT) {

Sdcard 路径创建失败

创建失败
Environment.getExternalStorageDirectory()+"/"+"Android/"+mContext.getPackageName()
创建正常  
context.getExternalFilesDir(Environment.DIRECTORY_DOCUMENTS)
沙盒，简单而言就是应用专属文件夹，并且访问这个文件夹无需权限。谷歌官方推荐应用在沙盒内存储文件的地址为Context.getExternalFilesDir()下的文件夹。比如要存储一张图片,则应放在Context.getExternalFilesDir(Environment.DIRECTORY_PICTURES)中。

在使用Android SDK 版本超过29编译的时候，Android Studio会提示[Environment](https://so.csdn.net/so/search?q=Environment&spm=1001.2101.3001.7020).getExternalStorageDirectory()过时了，要用Context#getExternalFilesDir代替，Android Q以后Environment.getExternalStorageDirectory()返回的路径可能无法直接访问，所以改成了Context#getExternalFilesDir

所以Environment.getExternalStorageDirectory()可以改成：
getExternalFilesDir(null);
得到的路径如下：

/storage/emulated/0/Android/data/yourPackageName/files

EditText 设置背景null，文字居中，结果显示偏上

设置padding 0 正常居中

Manifest merger failed with multiple errors, see logs

gradlew processDebugManifest --stacktrace

.9图报错 file failed to compile

用AndroidStudio打开图片，添加缩放区域，添加后图片会有一个黑色的缩放区域，截图如下

image.png

java.lang.NoClassDefFoundError: Failed resolution of: Lcom/**

aspectjx {
    //织入遍历符合条件的库
    //includeJarFilter 'universal-image-loader', 'AspectJX-Demo/library'
    //排除包含‘universal-image-loader’的库
    //excludeJarFilter 'universal-image-loader'
    //排除所有package路径中包含`android.support`的class文件及库（jar文件）
    //exclude 'android.support','com.baidu','com.taobao','com.jakewharton','com.squareup','com.alibaba','com.tencent','com.alipay','com.huawei','org.apache','com.example.zxingdemo','com.google','com.handmark','com.lahm','tdx.com.tdxbdrecord','tdxweex','tdxbdtts'
    exclude 'com.*.ConfirmPayModule'
    include 'com.*'
}

More than one file was found with OS independent path 'lib/armeabi-v7a/*.so'

android {
    ...
    // Fix: More than one file was found
    packagingOptions {
        pickFirst 'lib/armeabi-v7a/*.so'
    }
}

flutter的一个包初始化报错BootstrapMethodError ->NoClassDefFoundError

报错代码
this.flutterState = new VideoPlayerPlugin.FlutterState(binding.getApplicationContext(), binding.getBinaryMessenger(), flutterLoader::getLookupKeyForAsset, flutterLoader::getLookupKeyForAsset, binding.getTextureRegistry());

猜测是lambda表达式解析导致的，build.gradle添加以下配置正常
    compileOptions{
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.mszq.mscfhtest/com.tdx.Android.TdxAndroidActivity}: java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
       
     Caused by: java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
        at com.idlefish.flutterboost.Debuger.exception(Debuger.java:61)
        at com.idlefish.flutterboost.FlutterBoost.registerPlugins(FlutterBoost.java:341)
        at com.idlefish.flutterboost.FlutterBoost.createEngine(FlutterBoost.java:328)
        at com.idlefish.flutterboost.FlutterBoost.doInitialFlutter(FlutterBoost.java:166)
        at com.idlefish.flutterboost.FlutterBoost$1.onActivityCreated(FlutterBoost.java:70)
       
     Caused by: java.lang.reflect.InvocationTargetException
        at java.lang.reflect.Method.invoke(Native Method)
        at com.idlefish.flutterboost.FlutterBoost.registerPlugins(FlutterBoost.java:339)
        at com.idlefish.flutterboost.FlutterBoost.createEngine(FlutterBoost.java:328) 
        at com.idlefish.flutterboost.FlutterBoost.doInitialFlutter(FlutterBoost.java:166) 
        at com.idlefish.flutterboost.FlutterBoost$1.onActivityCreated(FlutterBoost.java:70) 
        at android.app.Application.dispatchActivityCreated(Application.java:209) 
        at android.app.Activity.onCreate(Activity.java:1090) 
       
     Caused by: java.lang.BootstrapMethodError: Exception from call site #10 bootstrap method
        at io.flutter.plugins.videoplayer.VideoPlayerPlugin.onAttachedToEngine(VideoPlayerPlugin.java:63)
        at io.flutter.embedding.engine.FlutterEnginePluginRegistry.add(FlutterEnginePluginRegistry.java:133)
        at io.flutter.plugins.GeneratedPluginRegistrant.registerWith(GeneratedPluginRegistrant.java:27)
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.idlefish.flutterboost.FlutterBoost.registerPlugins(FlutterBoost.java:339) 
        at com.idlefish.flutterboost.FlutterBoost.createEngine(FlutterBoost.java:328) 
        at com.idlefish.flutterboost.FlutterBoost.doInitialFlutter(FlutterBoost.java:166) 
       
     Caused by: java.lang.NoClassDefFoundError: Invalid descriptor: LLL.
        at io.flutter.plugins.videoplayer.VideoPlayerPlugin.onAttachedToEngine(VideoPlayerPlugin.java:63) 
        at io.flutter.embedding.engine.FlutterEnginePluginRegistry.add(FlutterEnginePluginRegistry.java:133) 
        at io.flutter.plugins.GeneratedPluginRegistrant.registerWith(GeneratedPluginRegistrant.java:27) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.idlefish.flutterboost.FlutterBoost.registerPlugins(FlutterBoost.java:339) 
        at com.idlefish.flutterboost.FlutterBoost.createEngine(FlutterBoost.java:328) 
        at com.idlefish.flutterboost.FlutterBoost.doInitialFlutter(FlutterBoost.java:166) 
        at com.idlefish.flutterboost.FlutterBoost$1.onActivityCreated(FlutterBoost.java:70) 
        at android.app.Application.dispatchActivityCreated(Application.java:209) 
        at android.app.Activity.onCreate(Activity.java:1090) 
      

.gradle\caches\5.6.2\executionHistory\executionHistory.bin 不存在,文件目录顺坏，读取不到*.jar

AndroidStudio编译项目报错
翻了下gradle文件夹下5.6.5下载了，看到是caches目录，直接把caches下的5.6.2删除，重新build项目，恢复正常

Android 嵌入flutter相关代码 Process 'command 'bin\flutter.bat'' finished with non-zero exit value 1

gradlew assembleDebug --info 查看具体信息
处理相关bug，修复完后正常运行
flutter packages get获取pubspec.yaml文件中列出的所有依赖包
flutter packages upgrade 获取pubspec.yaml文件中列出的所有依赖包的最新版本
../comprehensive_search/lib/mszq/ms_stock_search_page.dart:249:35: Error: The method 'getMSSortNum' isn't defined for the class 

flutter 报错找不到libflutter.so

# ndk { abiFilters "armeabi" }打包apk，找不到libflutter.so
# lib/armeabi, /vendor/lib, /system/lib]]] couldn't find "libflutter.so"
先在gradle.properties中设置target-platform=android-arm
然后在项目的根目录的build.gradle  project.setProperty('target-platform', 'android-arm')
指定打包的相关配置就正常运行了

Android 嵌flutter 界面出现下移

flutter界面在点击EditText弹出PopWindow粘贴板出现下移  
屏蔽系统的粘贴板，未果，部分手机点击就会出现粘贴板
找布局变化发现多了个paddingTop
FlutterView.java ->onApplyWindowInsets   WindowInsets insets  paddingTop=56
SearchPage.dart->safe_area.dart  修改dart相关padding修复

AndroidStudio打开项目所有文件显示内容混乱

问题描述：
android studio 显示的内容错乱，xml中显示java代码，java中显示html代码。
本地代码显示正常，只在开发工具中查看有问题。
看到这个情况，真的是慌得一比，万能的清除缓存并重启，也不起作用了。 

网上说
删除.gradle , .idea , build 三个文件夹，注意不要删错了哦。
然后改项目文件夹名称,测试OK 
如果改完后运行报错,点击build->clean project ,然后再点击 rebuild project。无效。

然后找到另外一个解决方案：
.AndroidStudio3.5/system/cache

删除这个文件下 的东西重启就好了 

2.0 Android Studio在运行时显示Please Select Android SDK的解决方法
用的好好的突然用不了->点edit下一步下一步finish，编译恢复正常

image.png

Cannot find a version of 'androidx.lifecycle:lifecycle-runtime' that satisfies the version constraints

报错显示不同依赖对应的lifecycle-runtime版本号不同
解决方案,project下强制所有使用较新版本
allprojects {
    configurations {
        all {
            resolutionStrategy {
                force "android.arch.lifecycle:runtime:2.2.0"
            }
        }
    }
}

Warning: debug info can be unavailable. Please close other application using ADB: Monitor

改了一圈无果
adb usb  好了
参考[Warning: debug info can be unavailable. Please close other application using ADB: Monitor, - 简书 (jianshu.com)](https://www.jianshu.com/p/a7d6490967fd)

中国移动一键免密登录103102包签名错误

android应用签名  填写你密钥jks的MD5值(小写)

报错信息查询

//查看详细报错信息
gradlew compileDebugSource

Manifest merger failed with multiple errors, see logs
gradlew processDebugManifest --stacktrace

原生传参double给flutter 报错Caused by: java.lang.IllegalArgumentException: Unsupported Number type: class java.math.BigDecimal

当然你如果只是用来传Int就不需要处理 跳过吧
Android
JSONObject theJsonParam= new JSONObject();
JSONObject coordinate = new JSONObject();
coordinate.put("x",0);
coordinate.put("y",1.5);
theJsonParam.put("coordinate",coordinate);
Flutter
double x_coordinate = widget.params['coordinate']['x']

修改参数
coordinate.put("x","1.5");

var map = widget.params['coordinate'];
double x_coordinate = double.parse(map['x']);