android根据屏幕高度改变item占ListView高度

android根据屏幕高度改变item占ListView高度

首先要知道LayoutParams是什么。

利用LayoutParams可以更改每个item在listview中的样子。

// 调整每个Item占屏幕的百分比
AbsListView.LayoutParams lp = new AbsListView.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, mPullToRefreshListView.getHeight() / 5);
convertView.setLayoutParams(lp);

---

mPullToRefreshListView为我的listview控件。先获取到该listview在布局中所占的高度。然后除以我想每个页面显示item的个数，就得到了每个item的高度。在用convertView.setLayoutParams(lp);改变当前item在view中的样子。
注意：setLayoutParams必须用父控件的LayoutParams。例如该item的父控件为listview所以使用的是AbsListView。
下面贴上我的适配器的所有代码：
package com.adapter;

import android.app.Activity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.android_demo.R;
import com.bean.MaoyanBean;

import java.util.List;

import adaptation.AbViewUtil;
import butterknife.BindView;
import butterknife.ButterKnife;

import com.bean.MaoyanBean.DataBean.MoviesBean;
import com.common.SystemApplication;
import com.pullToRefresh.PullToRefreshListView;

/**
* xlistview适配器
* XlistViewAdapter
*
* @author tianshi
* @time 2016/11/16 9:18
*/

public class XlistViewAdapter extends BaseAdapter {
private Activity mActivity;
private LayoutInflater mInflater;
private MaoyanBean mData;
private List list;
private PullToRefreshListView mPullToRefreshListView;

public XlistViewAdapter(Activity mActivity, PullToRefreshListView mPullToRefreshListView, MaoyanBean mData) {
    this.mActivity = mActivity;
    mInflater = LayoutInflater.from(mActivity);
    this.mData = mData;
    list = mData.getData().getMovies();
    this.mPullToRefreshListView = mPullToRefreshListView;
}

public int getCount() {
    return list.size();
}

public Object getItem(int position) {
    return list.get(position);
}

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

public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder viewHolder = null;
    if (convertView == null) {
        convertView = mInflater.inflate(R.layout.item_main02, null);
        viewHolder = new ViewHolder(convertView);
        // 调整每个Item占屏幕的百分比
        AbsListView.LayoutParams lp = new AbsListView.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, mPullToRefreshListView.getHeight() / 5);
        convertView.setLayoutParams(lp);
        convertView.setTag(viewHolder);
    } else {
        viewHolder = (ViewHolder) convertView.getTag();
    }
    //图片
    SystemApplication.showImage(mActivity, list.get(position).getImg(), viewHolder.iv01);
    //影片名
    viewHolder.tv01.setText(list.get(position).getNm());
    viewHolder.tv02.setText(list.get(position).getScm());
    viewHolder.tv03.setText(list.get(position).getShowInfo());

    return convertView;
}

/**
 * 优化机制
 */
static class ViewHolder {
    @BindView(R.id.iv_01)
    ImageView iv01;
    @BindView(R.id.tv_01)
    TextView tv01;
    @BindView(R.id.tv_02)
    TextView tv02;
    @BindView(R.id.tv_03)
    TextView tv03;

    ViewHolder(View view) {
        ButterKnife.bind(this, view);
        AbViewUtil.scaleContentView((LinearLayout) view.findViewById(R.id.rootLayout));

    }

}

}