Android ListView不同的item布局实现

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类似与这个 聊天效果 和 进入直播间

注意 在使用不同布局的时候,在适配器中 getItemViewType和getViewTypeCount不能少,一般的同一种item的列表是不用这两个函数的重载的，但是如果需要不同种类的item，就必须重载这两个

下面来看具体例子

public class VideoMessageAdapter extends BaseAdapter {

    private final ForegroundColorSpan redSpan;
    private final ForegroundColorSpan graySpan;
    private final ForegroundColorSpan yeSpan;
    private Context mContext;
    private ViewHolder1 holder1;
    private ViewHolder2 holder2;
    private List<String> data;
    private String name;
    private final int TYPE_1 = 0;
    private final int TYPE_2 = 1;
    private int index; //名字的长度,用于字体着色

    public VideoMessageAdapter(Context context, List<String> data) {
        this.mContext = context;
        this.data = data;
        //ForegroundColorSpan 为文字前景色，BackgroundColorSpan为文字背景色
        redSpan = new ForegroundColorSpan(context.getResources().getColor(R.color.video_text_color_red));
        graySpan = new ForegroundColorSpan(context.getResources().getColor(R.color.video_text_color_green));
        yeSpan = new ForegroundColorSpan(context.getResources().getColor(R.color.luxury_gold));
    }

    @Override
    public int getCount() {
        return data == null ? 0 : data.size();
    }

    @Override
    public Object getItem(int position) {
        return data.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    public void NotifyAdapter(List<String> data,int index) {
        this.data = data;
        this.index = index;
        notifyDataSetChanged();
    }

    @Override
    public int getItemViewType(int position) {
        // TODO Auto-generated method stub
        if (position == data.size() - 1)
            return TYPE_2;
        else
            return TYPE_1;
    }

    @Override
    public int getViewTypeCount() {
        // TODO Auto-generated method stub
        return 2;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        holder1 = null;
        holder2 = null;
        int type = getItemViewType(position);
        if (convertView == null) {

            switch (type) {
                case TYPE_1:
                    holder1 = new ViewHolder1();
                    convertView = View.inflate(mContext, R.layout.item_messageadapter, null);
                    holder1.tvcontent1 = (TextView) convertView.findViewById(R.id.tvcontent);
                    convertView.setTag(holder1);
                    break;
                case TYPE_2:
                    holder2 = new ViewHolder2();
                    convertView = View.inflate(mContext, R.layout.item_messageadapter1, null);
                    holder2.tvcontent2 = (TextView) convertView.findViewById(R.id.tvcontent1);
                    convertView.setTag(holder2);
                    break;
            }
        } else {
            switch (type) {
                case TYPE_1:
                    holder1 = (ViewHolder1) convertView.getTag();

                    break;
                case TYPE_2:
                    holder2 = (ViewHolder2) convertView.getTag();

                    break;
            }
        }
        switch (type) {
            case TYPE_1:
                holder1.tvcontent1.setText(data.get(position));
                if (position % 2 == 0) {
                    //这里注意一定要先给textview赋值
                    SpannableStringBuilder builder = new SpannableStringBuilder(holder1.tvcontent1.getText().toString());
                    //为不同位置字符串设置不同颜色
                    builder.setSpan(graySpan, 0, 6, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
                    //最后为textview赋值
                    holder1.tvcontent1.setText(builder);
                } else if (position % 3 == 1) {
                    //这里注意一定要先给textview赋值
                    SpannableStringBuilder builder = new SpannableStringBuilder(holder1.tvcontent1.getText().toString());
                    //为不同位置字符串设置不同颜色
                    builder.setSpan(redSpan, 0, 13, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
                    //最后为textview赋值
                    holder1.tvcontent1.setText(builder);
                } else {
                    //这里注意一定要先给textview赋值
                    SpannableStringBuilder builder = new SpannableStringBuilder(holder1.tvcontent1.getText().toString());
                    //为不同位置字符串设置不同颜色
                    builder.setSpan(graySpan, 0, 5, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
                    //最后为textview赋值
                    holder1.tvcontent1.setText(builder);
                }
                break;
            case TYPE_2:
                holder2.tvcontent2.setText(data.get(position));
                //这里注意一定要先给textview赋值
                SpannableStringBuilder builder = new SpannableStringBuilder(holder2.tvcontent2.getText().toString());
                //为不同位置字符串设置不同颜色
                builder.setSpan(yeSpan, 0, index, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
                //最后为textview赋值
                holder2.tvcontent2.setText(builder);
                break;
        }
        return convertView;
    }

    private final class ViewHolder1 {
        TextView tvcontent1;
    }

    private final class ViewHolder2 {
        TextView tvcontent2;
    }
}

大概就到这了  祝大家编辑代码愉快!