多种类布局的适配器及优化

class MyAdapter extends BaseAdapter {

    private final int TYPE0 = 0;
    private final int TYPE1 = 1;

    //长度
    @Override
    public int getCount() {
        return datalist.size();
    }

    //布局
    @Override
    public Object getItem(int i) {
        return datalist.get(i);
    }

    //下标
    @Override
    public long getItemId(int i) {
        return i;
    }

    //多少种布局
    @Override
    public int getViewTypeCount() {
        return 2;
    }


    //下标对应的布局
    @Override
    public int getItemViewType(int position) {
        boolean b = datalist.get(position).getIMAGEURL() != null;
        if (b) {
            return 0;
        } else {
            return 1;
        }

    }

    //设置布局并且优化
    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        //获取不同布局的返回值
        int type = getItemViewType(i);
        ViewHolder0 holder0;
        ViewHolder1 holder1;
        //判断选择
        switch (type) {
            case TYPE0:
                //判断是否为空
                if (view == null) {
                    //获取布局
                    view = View.inflate(MainActivity.this, R.layout.item0, null);
                    holder0 = new ViewHolder0();
                    //初始化组件
                    holder0.tv0 = view.findViewById(R.id.tv_content);
                    holder0.tv1 = view.findViewById(R.id.tv_time);
                    //关联
                    view.setTag(holder0);
                } else {
                    holder0 = (ViewHolder0) view.getTag();
                }
                //赋值
                holder0.tv0.setText(datalist.get(i).getTITLE());
                holder0.tv1.setText(datalist.get(i).getSHOWTIME());
                break;

            case TYPE1:
                if (view == null) {
                    //获取布局
                    view = View.inflate(MainActivity.this, R.layout.item, null);
                    holder1 = new ViewHolder1();
                    //初始化组件
                    holder1.tv0 = view.findViewById(R.id.tv_content);
                    holder1.tv1 = view.findViewById(R.id.tv_time);
                    holder1.iv = view.findViewById(R.id.iv);
                    //关联
                    view.setTag(holder1);
                } else {
                    holder1 = (ViewHolder1) view.getTag();
                }
                //赋值
                holder1.tv0.setText(datalist.get(i).getTITLE());
                holder1.tv1.setText(datalist.get(i).getSHOWTIME());
                //设置图片
                instance.displayImage((String) datalist.get(i).getIMAGEURL(), holder1.iv,options);
                break;
        }
        return view;
    }
}

布局：

0：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center_vertical"
    android:orientation="horizontal"
    android:padding="10dp">

    <ImageView
        android:id="@+id/iv"
        android:layout_width="150dp"
        android:layout_height="100dp"
        android:src="@mipmap/ic_launcher" />

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:padding="10dp">

        <TextView
            android:id="@+id/tv_content"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="ASDASDAS"
            android:textSize="24sp" />

        <TextView
            android:id="@+id/tv_time"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp"
            android:text="ASDASDAS"
            android:textSize="16sp" />
    </LinearLayout>
</LinearLayout>
1：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center_vertical"
    android:orientation="vertical"
    android:padding="10dp">

    <TextView
        android:id="@+id/tv_content"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="ASDASDAS"
        android:textSize="24sp" />

    <TextView
        android:id="@+id/tv_time"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:text="ASDASDAS"
        android:textSize="16sp" />
</LinearLayout>