java - 我应该使用 RoboGuice 还是其他依赖注入(inject)框架？

Question

我从一位 friend 那里听说，使用 RoboGuice 使 Coding 变得更加容易和简单。 。但我发现Official document of Android当我读this时。作者在第二点中说道:

Official document of Android suggests to avoid dependency injection frameworks like Guice or RoboGuice, reason being is it’s a reflection based library and it creates overheads at run time. Even it tends to perform a lot of process initialization by scanning your code for annotations, which can require significant amounts of your code to be mapped into RAM even though you don’t need it. (Here I would say we can use Android annotation library because it creates duplicate copy of annotated classes so it won’t create any overhead at runtime but at compile time.)

那么我应该使用它吗？任何帮助将不胜感激。

Answer 1

是的，它变得越来越容易，但是正如您在官方文档中所读到的，就像您上面所说的那样，这种依赖注入(inject)会降低您的应用程序性能，因为它依赖于 Java's Reflection .
但并非所有依赖注入(inject)都使用反射，如 Butterknife和 Dagger 2因此它不会影响您的应用性能。

Butterknife 用法示例:

class ButterknifeActivity extends Activity {
  @Bind(R.id.title) TextView title;
  @Bind(R.id.logo) ImageView logo;

  @Override public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main_activity);
    ButterKnife.bind(this);
  }
}

使用 Butterknife，您不需要调用 findViewById 并强制转换它，而是库会为您执行此操作。