Android 开发杂记（不定时持续更新）-白红宇

简要目录

解决git游离态结点

解决Android popupwindow弹出遮罩问题

Android 使用swaggercodegen流程及踩坑

拯救游离的head（HEAD detached at head）

以本次提交的commit id 创建一个分支

git branch newbranch 7d8733939 复制代码

切换到自己的工作分支

git checkout dev复制代码

把刚刚临时创建的newbranch 合并到自己的工作分支当中

git merge newbranch复制代码

然后push到服务器万事大吉（不需要的add commit了）

git push复制代码

关于popupwinodw 所在Activity无遮罩的解决方案

思路： 获取到当前Activity的window，通过设置window.LayoutParams的alph改变其透明度，达到背景遮罩的效果

WindowManager.LayoutParams lp = getWindow().getAttributes();lp.alpha = 0.4f;getWindow().clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);getWindow().setAttributes(lp);复制代码

当然当popupwindow 消失的时候你要让他的透明度恢复正常1

Android 客户端集成swgger codegen生成的代码(Retrofit)

过程

准备好json或者YAM文件,他是codegen用来生成的参考

配置config.gso,是生成过程的一些配置

config.json

{  "library": "retrofit2",  "useRxJava2": "false",  "developerName": "红孩儿",  "developerEmail": "",  "developerOrganization": "alibaba",  "invokerPackage": "com.alibaba.warehousing.network",  "modelPackage": "com.alibaba.warehousing.entrygen",  "apiPackage": "com.alibaba.warehousing.network.data.api",  "artifactId": "swagger-petstore-retrofit2"}复制代码

cmd命令行使用命令

java -jar swagger-codegen.jar generate -i json.json -o client -l java -c config.json -DdateLibrary=legacy复制代码

踩坑

在AS中向项目中集成时候出现冲突

Program type already present: org.apache.oltu.oauth2.common.OAuth$HttpMethod复制代码

解决冲突

configurations.all {exclude group: 'org.apache.oltu.oauth2', module: 'org.apache.oltu.oauth2.common'}复制代码

关于Date问题可能自动生成的代码中的Date跟我们想要的不一样，可以在Gson反序列化的时候，转换成我们想要的格式。

gson = new GsonBuilder()                    .setDateFormat("yyyy-MM-dd HH:mm:ss")                    .registerTypeAdapter(Date.class, new JsonDeserializer
    
     () {                        public Date deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {                            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");                            try {                                return sdf.parse(json.getAsJsonPrimitive().getAsString());                            } catch (ParseException e) {                                e.printStackTrace();                            }                            return null;                        }                    })                    .create();复制代码

自动生成的Retrofit实体类转换时自定义

来个栗子说明:服务端返回的接口是这样的

{
   "result":null,"success":true,"error":null}复制代码

当success为true的时候，result里面就有值了，而且是不确定的值可能为某种类型的实体，也可能是Array。

自动生成的代码的接口是这样的：

@GET("api/services/app/User/Get")  Call
    
      apiServicesAppRackGetGet(          @Query("id") Integer id  );复制代码

实际返回的是这样的

{
   "result":{
   "username":"李不凡","age”:21},"success":true,"error":null}复制代码

明白这个问题了吧：我接口API里期望的是User，返回的是被Result包装过的User了，直接反序列化会出现问题

解决方式，Retrofit.Builder adapterBuilder添加converterfactory，自己写一个转换器，把json转换成我们期望的形式

public class CustomizeGsonConverterFactory extends Converter.Factory {    public static CustomizeGsonConverterFactory create() {        return create(new Gson());    }    public static CustomizeGsonConverterFactory create(Gson gson) {        return new CustomizeGsonConverterFactory(gson);    }    private final Gson gson;    private CustomizeGsonConverterFactory(Gson gson) {        if (gson == null) {            throw new NullPointerException("gson == null");        }        this.gson = gson;    }    @Override    public Converter
    
      responseBodyConverter(Type type, Annotation[] annotations,                                                            Retrofit retrofit) {        TypeAdapter
      adapter = gson.getAdapter(TypeToken.get(type));        return new CustomizeGsonResponseBodyConverter<>(gson, adapter);    }    @Override    public Converter
      requestBodyConverter(Type type, Annotation[] parameterAnnotations, Annotation[] methodAnnotations, Retrofit retrofit) {        TypeAdapter
      adapter = gson.getAdapter(TypeToken.get(type));        return new CustomizeGsonRequestBodyConverter<>(gson, adapter);    }}复制代码

public class CustomizeGsonRequestBodyConverter
    
      implements Converter
     
       {    private static final MediaType MEDIA_TYPE = MediaType.parse("application/json; charset=UTF-8");    private static final Charset UTF_8 = Charset.forName("UTF-8");    private final Gson gson;    private final TypeAdapter
      
        adapter;    CustomizeGsonRequestBodyConverter(Gson gson, TypeAdapter
       
         adapter) {        this.gson = gson;        this.adapter = adapter;    }    @Override    public RequestBody convert(T value) throws IOException {        Buffer buffer = new Buffer();        Writer writer = new OutputStreamWriter(buffer.outputStream(), UTF_8);        JsonWriter jsonWriter = gson.newJsonWriter(writer);        adapter.write(jsonWriter, value);        jsonWriter.close();        return RequestBody.create(MEDIA_TYPE, buffer.readByteString());    }}复制代码

public class CustomizeGsonResponseBodyConverter
    
      implements Converter
     
       {    private final Gson gson;    private final TypeAdapter
      
        adapter;    CustomizeGsonResponseBodyConverter(Gson gson, TypeAdapter
       
         adapter) {        this.gson = gson;        this.adapter = adapter;    }    @Override    public T convert(ResponseBody value) throws IOException {        String response = value.string();        NetResponse baseResponse = gson.fromJson(response, NetResponse.class);        if (baseResponse.success) {            try {                return adapter.fromJson(gson.toJson(baseResponse.result));            } finally {                value.close();            }        } else {            throw new ApiException(gson.toJson(baseResponse.error));        }    }}复制代码