标签：android listview adapter 图片缩放 listview高度
一、listview
<ListView
android:id="@+id/piclist"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_above="@+id/bottom"
android:layout_marginTop="106dp"
android:divider="#00000000"
android:listSelector="#00000000"
android:scrollbars="none" />android:divider="#00000000"设置列表项的间隔颜色透明，
android:listSelector="#00000000"设置点击图片时无背景色（透明色，不用系统背景色）
二、piclist_item
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ImageView
android:id="@+id/piclist_item"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:scaleType="fitStart"/>
</RelativeLayout>
三、PicListInfo
package com.cartoon.adapters;
import android.graphics.Bitmap;
public class PicListInfo {
private Bitmap PicUrl; //图片地址
//下面是上面属性的get和set方法
public Bitmap getPicUrl() {
return PicUrl;
}
public void setPicUrl(Bitmap picUrl) {
PicUrl = picUrl;
}
}
package com.cartoon.adapters;
import java.util.ArrayList;
import com.cartoon.R;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.MeasureSpec;
import android.view.ViewGroup;
import android.view.ViewGroup.MarginLayoutParams;
import android.view.WindowManager;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.TextView;
public class PicListAdapter extends ArrayAdapter<PicListInfo>{
public PicListAdapter(Context context, int textViewResourceId, ArrayList<PicListInfo> objects)
{
super(context, textViewResourceId, objects);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder =null;
View view;
WindowManager wm = (WindowManager) getContext()
.getSystemService(Context.WINDOW_SERVICE);
int width = wm.getDefaultDisplay().getWidth();
if (convertView == null) {
view = LayoutInflater.from(getContext()).inflate(R.layout.piclist_item, null);
<pre name="code" class="java"> //设置图片的尺寸
holder = new ViewHolder();
holder.piclist_item = (ImageView)view.findViewById(R.id.piclist_item);
ViewGroup.LayoutParams margin = new ViewGroup.LayoutParams(holder.piclist_item.getLayoutParams());
RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(margin);
layoutParams.height = (int) (width*0.5677);//设置图片的高度 WindowManager wm = (WindowManager) getContext()
.getSystemService(Context.WINDOW_SERVICE);
int width = wm.getDefaultDisplay().getWidth();
int height = wm.getDefaultDisplay().getHeight();再调整图片尺寸，注释已经写的比较清楚：
<pre name="code" class="java"> holder.piclist_item = (ImageView)view.findViewById(R.id.piclist_item); ViewGroup.LayoutParams margin9 = new ViewGroup.LayoutParams(holder.piclist_item.getLayoutParams()); RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(margin);layoutParams.height = (int) (width*0.5677);//设置图片的高度
附：ScaleType属性
1）CENTER 按图片的原来size 居中显示，当图片长宽超过View的上宽时，则截取图片的居中部分显示 2）CENTER_CROP 按比例扩大图片的size 居中显示，使得图片的长宽的等于或大于View的长宽 3）CENTER_INSIDE 将图片的内容完整居中显示，通过按比例缩小或原来的size使得图片长宽等于或小于view的长宽 4）FIT_CENTER 把图片按比例扩大或缩小到View的宽度，然后居中显示 5）FIT_STAR 把图片按比例扩大或缩小到View的宽度，然后置顶显示 6）FIT_END 把图片按比例扩大或缩小到View的宽度，然后置于底部显示 7）FIT_XY 不按比例缩放图片，目标是把整个图片塞满整个View
如果
Android:漫画APP开发笔记之ListView中图片按屏幕宽度缩放
标签：android listview adapter 图片缩放 listview高度
原文地址：http://blog.csdn.net/cooelf/article/details/43418067
