ARouter源码简析系列二：navigation过程

最新推荐文章于 2024-12-01 19:19:08 发布

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最新推荐文章于 2024-12-01 19:19:08 发布 · 2.7k 阅读

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#android #arouter

ARouter源码简析系列一：初始化流程

ARouter的navigation过程

1.postcard制作过程
2.完善postcard信息
- 2.1 @Route生成的映射类(方便举例说明)
- 2.2 完善postcard过程稍长忍一下
3.导航处理流程
4.不同类型路由匹配处理流程
总结

之前讲了初始化流程，现在接着看navigation过程,先来一个使用示例后面好举例

@Route(path = "/image/imageActivity")
class MainActivity : AppCompatActivity() {
   
   
    @Autowired(name = "tip")
    @JvmField
    var mTip: String? = ""
    override fun onCreate(savedInstanceState: Bundle?) {
   
   
        super.onCreate(savedInstanceState)
        ARouter.getInstance().inject(this)
        setContentView(R.layout.layout_activity_main)
        findViewById<TextView>(R.id.mTvImageModule).setOnClickListener {
   
   
            ARouter.getInstance().build("/login/loginActivity").navigation(this)
        }
    }
}

1.postcard制作过程

postcard何许人也，翻译是明信片，也就是路由信息类，里面存着路由数据uri, 携带参数，路径等等

protected Object navigation(final Context context, final Postcard postcard, final int requestCode, final NavigationCallback callback) {
   
   
        PretreatmentService pretreatmentService = ARouter.getInstance().navigation(PretreatmentService.class);
        if (null != pretreatmentService && !pretreatmentService.onPretreatment(context, postcard)) {
   
   
            // Pretreatment failed, navigation canceled.
            return null;
        }

        // Set context to postcard.
        postcard.setContext(null == context ? mContext : context);

        try {
   
   
            LogisticsCenter.completion(postcard);
        } 
		//省略代码
        return null;
    }

postcard保存了所有跳转类相关信息
1.设置postcard的context
2.调用LogisticsCenter.completion完善postcard信息

2.完善postcard信息

2.1 @Route生成的映射类(方便举例说明)

public class ARouter$$Group$$image implements IRouteGroup {
   
   
  @Override
  public void loadInto(Map<String, RouteMeta> atlas) {
   
   
    atlas.put("/image/imageActivity", RouteMeta.build(RouteType.ACTIVITY, MainActivity.class, "/image/imageactivity", "image", new java.util.HashMap<String, Integer>(){
   
   {
   
   put("tip", 8); }}, -1, -2147483648));
  }
}

2.2 完善postcard过程稍长忍一下

  public synchronized static void completion(Postcard postcard) {
   
   
        if (null == postcard) {
   
   
            throw new NoRouteFoundException(TAG + "No postcard!");
        }