xUtils系列之ViewUtils-ViewInject注解

ViewInject注解定义:

@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
public @interface ViewInject {
    int value();
    /* parent view id */
    int parentId() default 0;
}

ViewUtils中的注解部分:

ViewInject viewInject = field.getAnnotation(ViewInject.class);
if (viewInject != null) {
    try {
        View view = finder.findViewById(viewInject.value(), viewInject.parentId());
        if (view != null) {
            field.setAccessible(true);
            field.set(handler, view);
        }
    } catch (Throwable e) {
        LogUtils.e(e.getMessage(), e);
    }
}

使用方法:


首先,创建如下两个布局文件:
activity_main.xml:

layout_include.xml:

MainActivity.java:

@ContentView(R.layout.activity_main)
public class MainActivity extends Activity {


	@ViewInject(R.id.tv)
	public TextView tv;
	
	@ViewInject(value=R.id.tv1_include,parentId=R.layout.layout_include)
	public TextView tv1_include;
	
	@ViewInject(R.id.tv2_include)
	public TextView tv2_include; //tv2_include虽然是在include布局中,但是它也在activity_main布局的视图树中,
				    //所以不指定父id也能被找到, 实际上,注解中的parentId这个属性是多余的.
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		ViewUtils.inject(this);
	}
}