ListView多条目加载

自定义列表适配器

最新推荐文章于 2019-01-03 16:26:42 发布

zxmyl

最新推荐文章于 2019-01-03 16:26:42 发布

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CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/zxmyl/article/details/52280387

本文介绍了一种自定义的Android列表适配器实现方法，该适配器能够根据不同数量的图片显示不同的布局样式，包括一张小图、三张小图、一张大图以及无图片的布局，并使用了Universal Image Loader进行图片加载。

适配器：

package com.ex.moni;

import java.util.List;

import com.bawei.bean.Data;
import com.bawei.bean.Image_listE;
import com.bawei.bean.Large_image_list;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration.Builder;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class MyAdapter extends BaseAdapter {
    private List<Data> list;
    private Context context;
    private ImageLoader imageLoader;

    public MyAdapter(List<Data> list, Context context) {
        super();
        this.list = list;
        this.context = context;
        imageLoader = ImageLoader.getInstance();
        imageLoader.init(ImageLoaderConfiguration.createDefault(context));

    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return list.size();
    }

    @Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        int type = getItemViewType(position);
        viewhoder1 view1 = null;
        viewhode2 view2 = null;
        viewhoder3 view3 = null;
        viewhoder4 view4 = null;
        if (convertView == null) {
            switch (type) {
            // 一张小图
            case 0:
                view1 = new viewhoder1();
                convertView = View.inflate(context, R.layout.item0, null);
                view1.tve = (TextView) convertView
                        .findViewById(R.id.title_ite0);
                view1.iView = (ImageView) convertView
                        .findViewById(R.id.imageView_item0);
                view1.tvname = (TextView) convertView
                        .findViewById(R.id.title_itename);
                view1.tvpl = (TextView) convertView.findViewById(R.id.title_pl);
                convertView.setTag(view1);

                break;
            // 三张小图
            case 1:
                view2 = new viewhode2();
                convertView = View.inflate(context, R.layout.item1, null);
                view2.tve2 = (TextView) convertView
                        .findViewById(R.id.title_item1);
                view2.tvname = (TextView) convertView
                        .findViewById(R.id.item1_tevname);
                view2.tepl = (TextView) convertView
                        .findViewById(R.id.item1_tepl);
                view2.iv1 = (ImageView) convertView
                        .findViewById(R.id.imageView_item1);
                view2.iv2 = (ImageView) convertView
                        .findViewById(R.id.imageView_item1_2);
                view2.iv3 = (ImageView) convertView
                        .findViewById(R.id.imageView_item1_3);
                convertView.setTag(view2);

                break;
            // 一张大图
            case 2:
                view3 = new viewhoder3();
                convertView = View.inflate(context, R.layout.item2, null);

                view3.tve3 = (TextView) convertView
                        .findViewById(R.id.title_item2);
                view3.tvname = (TextView) convertView
                        .findViewById(R.id.item2_tvname);
                view3.tvpl = (TextView) convertView
                        .findViewById(R.id.item2_tvepl);
                view3.ivda1 = (ImageView) convertView
                        .findViewById(R.id.imageView_item2);
                convertView.setTag(view3);

                break;
            // 没有图
            case 3:
                view4 = new viewhoder4();
                convertView = View.inflate(context, R.layout.item3, null);
                view4.tve4 = (TextView) convertView
                        .findViewById(R.id.title_item3);
                view4.tvname = (TextView) convertView
                        .findViewById(R.id.title_item3_1);
                view4.tvpl = (TextView) convertView
                        .findViewById(R.id.title_item3_3);
                convertView.setTag(view4);

                break;

            }
        } else {
            switch (type) {
            case 0:
                view1 = (viewhoder1) convertView.getTag();
                break;
            case 1:
                view2 = (viewhode2) convertView.getTag();
                break;
            case 2:
                view3 = (viewhoder3) convertView.getTag();
                break;
            case 3:
                view4 = (viewhoder4) convertView.getTag();
                break;

            }

        }
        // 赋值
        switch (type) {
        case 0:
            view1.tve.setText(list.get(position).getTitle());
            view1.tvpl.setText("评论 " + list.get(position).getTitle());
            view1.tvname.setText(list.get(position).getTitle());
            imageLoader.displayImage(list.get(position).getImage_list().get(0)
                    .getUrl(), view1.iView);
            break;

        case 1:
            view2.tve2.setText(list.get(position).getTitle());
            view2.tvname.setText(list.get(position).getTitle());
            view2.tepl.setText("评论 " + list.get(position).getTitle());
            imageLoader.displayImage(list.get(position).getImage_list().get(0)
                    .getUrl(), view2.iv1);
            imageLoader.displayImage(list.get(position).getImage_list().get(1)
                    .getUrl(), view2.iv2);
            imageLoader.displayImage(list.get(position).getImage_list().get(2)
                    .getUrl(), view2.iv3);
            break;
        case 2:
            view3.tve3.setText(list.get(position).getTitle());
            view3.tvname.setText(list.get(position).getTitle());
            view3.tvpl.setText("评论 " + list.get(position).getTitle());
            imageLoader.displayImage(list.get(position).getLarge_image_list()
                    .get(0).getUrl(), view3.ivda1);
            break;
        case 3:
            view4.tve4.setText(list.get(position).getTitle());
            view4.tvname.setText(list.get(position).getTitle());
            view4.tvpl.setText("评论 " + list.get(position).getTitle());
            break;

        }
        return convertView;
    }

    @Override
    public int getItemViewType(int position) {
        // TODO Auto-generated method stub
        Data bean = list.get(position);
        List<Image_listE> list2 = bean.getImage_list();
        List<Large_image_list> list3 = bean.getLarge_image_list();
        if (list2 != null && list2.size() == 1) {
            // 一张小图
            return 0;
        } else if (list2 != null && list2.size() == 3) {
            // 三张小图
            return 1;
            // 一张大图
        } else if (list3 != null && list3.size() == 1) {
            return 2;
        } else {
            return 3;
        }

    }

    @Override
    public int getViewTypeCount() {
        // TODO Auto-generated method stub
        return 4;
    }

    // 一张小图
    class viewhoder1 {
        TextView tve, tvname, tvpl;
        ImageView iView;

    }

    // 三张小图
    class viewhode2 {
        TextView tve2, tvname, tepl;
        ImageView iv1;
        ImageView iv2;
        ImageView iv3;
    }

    // 一张大图
    class viewhoder3 {
        TextView tve3, tvname, tvpl;
        ImageView ivda1;
    }

    class viewhoder4 {
        TextView tve4, tvname, tvpl;
    }

}

布局0 一张小图：

<?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:orientation="horizontal" >

    <RelativeLayout
        android:id="@+id/rel"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="3" >

        <TextView
            android:id="@+id/title_ite0"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm" />

        <TextView
            android:id="@+id/title_itename"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="90dp"
            android:text="来源"
            android:textColor="#B5B5B5" />

        <TextView
            android:id="@+id/title_pl"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="80dp"
            android:layout_marginTop="90dp"
            android:text="评论"
            android:textColor="#B5B5B5" />
    </RelativeLayout>

    <RelativeLayout
        android:id="@+id/rr"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1" >

        <ImageView
            android:id="@+id/imageView_item0"
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:layout_marginRight="10dp"
            android:layout_marginTop="10dp"
            android:src="@drawable/ic_launcher" />
    </RelativeLayout>

</LinearLayout>

布局1 三张小图：

<?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:orientation="vertical" >

    <TextView
        android:id="@+id/title_item1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:layout_marginTop="10dp"
        android:orientation="horizontal" >

        <ImageView
            android:id="@+id/imageView_item1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:src="@drawable/ic_launcher" />

        <ImageView
            android:id="@+id/imageView_item1_2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="10dp"
            android:layout_weight="1"
            android:src="@drawable/ic_launcher" />

        <ImageView
            android:id="@+id/imageView_item1_3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="10dp"
            android:layout_weight="1"
            android:src="@drawable/ic_launcher" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >

        <TextView
            android:id="@+id/item1_tevname"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp"
            android:text="通道大叔"
            android:textColor="#B5B5B5" />

        <TextView
            android:id="@+id/item1_tepl"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="10dp"
            android:layout_marginTop="10dp"
            android:text="评论"
            android:textColor="#B5B5B5" />
    </LinearLayout>

</LinearLayout>

布局2 一张大图：

<?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:orientation="vertical" >

    <TextView
        android:id="@+id/title_item2"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

    <ImageView
        android:id="@+id/imageView_item2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_launcher" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:orientation="horizontal" >

        <TextView
            android:id="@+id/item2_tvname"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="新民"
            android:textColor="#B5B5B5" />

        <TextView
            android:id="@+id/item2_tvepl"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="50dp"
            android:text="pl"
            android:textColor="#B5B5B5" />
    </LinearLayout>

</LinearLayout>

布局3 没有图：

<?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:orientation="vertical" >

    <TextView
        android:id="@+id/title_item3"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="mm" />

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:orientation="horizontal" >

        <TextView
            android:id="@+id/title_item3_1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="zz"
            android:textColor="#B5B5B5" />

        <TextView
            android:id="@+id/title_item3_3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="50dp"
            android:text="评论"
            android:textColor="#B5B5B5" />
    </LinearLayout>

</LinearLayout>