AndroidTV：ImageView的焦点

先看一下效果吧

就是简单new了两个imageview，然后给两个imageview添加焦点，实时返回焦点所处的imageviw 

 简单的封装

因为我的按钮都是需要通过云端自定义的，所以都是在代码里面new出来的

ImageViewClick.java

public class ImageViewClick {
    ImageFocus imageFocus;
    //焦点
    public static void Image(ImageView[] imageViews, Context context, ImageFocus imageFocus) {
        for(ImageView s : imageViews) {
            //初始化一下样式
            s.setBackgroundColor(0x80CFCFCF);
            s.setFocusable(true);
            s.isFocusableInTouchMode();
            //焦点
            s.setOnFocusChangeListener(new View.OnFocusChangeListener() {
                @Override
                public void onFocusChange(View v, boolean hasFocus) {
                    Log.e("Home230115-t","找到焦点");
                    ImageViewStyle(hasFocus,s,context,imageFocus);
                }
            });
        }
    }

    private static void ImageViewStyle(Boolean tf, ImageView imageView,Context context,ImageFocus imageFocus) {
        if (tf) {
            Log.e("Home230115-t",tf+"");
            imageView.setBackground(context.getResources().getDrawable(R.drawable.imageview_border_show));
            imageView.setPadding(10,10,10,10);
            imageFocus.ChooseImage(imageView);
        } else {
            Log.e("Home230115-f",tf+"");
            imageView.setBackground(context.getResources().getDrawable(R.drawable.imageview_border_hint));
            imageView.setPadding(10,10,10,10);
        }
    }
}

 这个是接口

拿到焦点就回调，告诉ui我当前是在哪个image上

ImageFocus.java

public interface ImageFocus {

    void ChooseImage(ImageView imageView);
}

使用的话就很简单

ll_tab是我在xml画好的布局，用来限制这些imageview的位置

    private void setTab(){
        ImageView iv_Film = new ImageView(MainActivity.this);
        iv_Film.setImageDrawable(getResources().getDrawable((R.drawable.ic_tab_film_n)));
        ll_tab.addView(iv_Film);

        ImageView iv_Catering = new ImageView(MainActivity.this);
        iv_Catering.setImageDrawable(getResources().getDrawable((R.drawable.ic_tab_film_n)));
        ll_tab.addView(iv_Catering);


        ImageView imageViews[] = {iv_Film,iv_Catering};
        ImageViewClick.Image(imageViews, MainActivity.this, new ImageFocus() {
            @Override
            public void ChooseImage(ImageView imageView) {
                //imageView.setImageDrawable(getResources().getDrawable((R.drawable.logo)));
            }
        });
    }

最后有两个选中和未选中的样式

imageview_border_hint.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">

    <corners android:radius="0px" />
    <stroke
        android:width="0px"
        android:color="@color/teal_200" />
    <solid android:color="@android:color/transparent" />

<!--    <padding-->
<!--        android:bottom="10dp"-->
<!--        android:left="10dp"-->
<!--        android:right="10dp"-->
<!--        android:top="10dp" />-->
</shape>

imageview_border_show.xml 

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">

    <corners android:radius="5dp" />
    <stroke
        android:width="2dp"
        android:color="#ffffff" />
    <solid android:color="#00000000" />
<!--    <size-->
<!--        android:height="260dp"-->
<!--        android:width="155dp"/>-->

<!--        <padding-->
<!--            android:bottom="20dp"-->
<!--            android:left="20dp"-->
<!--            android:right="20dp"-->
<!--            android:top="20dp" />-->
</shape>