@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public@interfaceOnClick{
public intvalue();
}
@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
public@interfaceViewInject{
public intvalue();
}
public classViewUtils {
public static voidinject(Activity activity){
bindView(activity);
bindOnClick(activity);
}
private static voidbindOnClick(Activity activity) {
Class clazz = activity.getClass();
Field[] declaredFields = clazz.getDeclaredFields();
for(Field field : declaredFields) {
ViewInjectviewInject = field.getAnnotation(ViewInject.class);
if(viewInject !=null){
intresId = viewInject.value();
View view = activity.findViewById(resId);
field.setAccessible(true);
try{
field.set(activity,view);
}catch(IllegalAccessException e) {
e.printStackTrace();
}
}
}
}
private static voidbindView(finalActivity activity) {
Class clazz = activity.getClass();
Method[] declaredMethods = clazz.getDeclaredMethods();
for(finalMethod method : declaredMethods) {
OnClickonclick = method.getAnnotation(OnClick.class);
if(onclick !=null){
intresId = onclick.value();
finalView btn = activity.findViewById(resId);
btn.setOnClickListener(newView.OnClickListener() {
@Override
public voidonClick(View v) {
method.setAccessible(true);
try{
method.invoke(activity,btn);
}catch(Exception e) {
e.printStackTrace();
}
}
});
}
}
}
}
public classMainActivityextendsAppCompatActivity {
@ViewInject(R.id.tv1)
privateTextViewtv1;
@ViewInject(R.id.tv2)
privateTextViewtv2;
@Override
protected voidonCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ViewUtils.inject(this);
}
@OnClick(R.id.btn1)
public voidclick(View view){
Toast.makeText(this,"我被点击了",Toast.LENGTH_SHORT).show();
}
}
