rightParams.addRule(RelativeLayout.ALIGN_PARENT_RI

最新推荐文章于 2022-02-24 18:20:24 发布

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最新推荐文章于 2022-02-24 18:20:24 发布

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文章标签：移动开发 python

原文链接：https://my.oschina.net/u/1395670/blog/475172

本文解析了一个优惠券列表项的XML布局文件，并详细展示了如何使用Java代码为每个列表项填充数据，包括设置布局参数、加载图片及设置文本。

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<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:descendantFocusability="blocksDescendants"
    android:paddingTop="5dp" >
    <RelativeLayout
        android:id="@+id/list_item"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >
        <RelativeLayout
            android:id="@+id/item_right_layout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_alignParentRight="true" >
            <ImageView
                android:id="@+id/coupons_img"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:scaleType="fitXY" />
            <ImageView
                android:id="@+id/coupons_type_img"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentBottom="true"
                android:layout_alignParentRight="true" />
        </RelativeLayout>
        <LinearLayout
            android:id="@+id/item_left_layout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_alignParentLeft="true"
            android:background="@drawable/youhuiquan"
            android:gravity="center_horizontal"
            android:orientation="vertical" >
            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_weight="1"
                android:paddingBottom="2dp"
                android:paddingLeft="5dp"
                android:paddingRight="5dp"
                android:paddingTop="2dp">
                <ImageView
                    android:id="@+id/logo"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:adjustViewBounds="true"
                    android:layout_marginRight="3dp"
                    android:gravity="center"
                    android:scaleType="fitCenter" />
            </LinearLayout>
            <ImageView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:scaleType="centerCrop"
                android:src="@drawable/youhuiquan_fengexian" />
            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_weight="1"
                android:gravity="center"
                android:orientation="vertical" >
                <TextView
                    android:id="@+id/content"
                    android:layout_width="wrap_content"
                    android:layout_height="0dp"
                    android:singleLine="true" 
                    android:layout_weight="1"/>
                <TextView
                    android:id="@+id/distance"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:singleLine="true"
                    android:textSize="@dimen/ittle_size" />
            </LinearLayout>
        </LinearLayout>
    </RelativeLayout>
    <RelativeLayout
        android:id="@+id/cover_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#60000000"
        android:visibility="gone" >
        <TextView
            android:id="@+id/cover_txt"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:layout_marginTop="5dp"
            android:textColor="@color/white"
            android:textSize="@dimen/daohang_txt_size" />
    </RelativeLayout>
    <ImageView
        android:id="@+id/coupons_list_item_delete"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_centerVertical="true"
        android:src="@drawable/btn_shanchu2"
        android:visibility="gone" />
</RelativeLayout>

@Override
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
CouponBusinessData businessInfo = (CouponBusinessData) mList.get(position);
if (convertView == null) {
LayoutInflater layoutInflator = LayoutInflater.from(parent
.getContext());
convertView = layoutInflator.inflate(
R.layout.coupons_list_item, null);
holder = new ViewHolder();
holder.content = (TextView)convertView.findViewById(R.id.content);
holder.distance = (TextView)convertView.findViewById(R.id.distance);
holder.logoImg = (ImageView)convertView.findViewById(R.id.logo);
holder.couponsImg = (ImageView)convertView.findViewById(R.id.coupons_img);
holder.couponsTypeImg = (ImageView)convertView.findViewById(R.id.coupons_type_img);
holder.contentLayout = (RelativeLayout)convertView.findViewById(R.id.list_item);
holder.leftLayout = (LinearLayout)convertView.findViewById(R.id.item_left_layout);
holder.rightLayout = (RelativeLayout)convertView.findViewById(R.id.item_right_layout);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
itemHeight = Math.round(itemWidth / 4.2f);
leftWidth = Math.round(itemWidth/2.58f);
rightWidth = Math.round(itemWidth/1.6f);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
itemWidth, itemHeight);
holder.contentLayout.setLayoutParams(params);
RelativeLayout.LayoutParams leftParams = new RelativeLayout.LayoutParams(leftWidth,itemHeight);
RelativeLayout.LayoutParams rightParams = new RelativeLayout.LayoutParams(rightWidth,itemHeight);
rightParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
holder.leftLayout.setLayoutParams(leftParams);
holder.rightLayout.setLayoutParams(rightParams);
holder.distance.setText(mContext.getString(R.string.distance, businessInfo.getDistance()));
String digest = businessInfo.getDigest();
SpannableStringBuilder style = new SpannableStringBuilder(digest);
for (int i = 0; i < digest.length(); i++) {
if(Character.isDigit(digest.charAt(i))){
style.setSpan(new TextAppearanceSpan(mContext, R.style.TextRedBold), i, i+1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}
}
if (digest.contains(".")) {
int j = 0;
for (int i = 0; i < digest.length(); i++) {
j = digest.indexOf(".", j + 1);
if (j > 0) {
style.setSpan(new TextAppearanceSpan(mContext, R.style.TextRedBold), j, j+1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}else{
break;
}
}
}
holder.content.setText(style);
imageLoader.loadImage(businessInfo.getLogo(), holder.logoImg);
imageLoader.loadImage(businessInfo.getImg(), holder.couponsImg);
if(0==businessInfo.getType()){
holder.couponsTypeImg.setImageDrawable(mContext.getResources().getDrawable(R.drawable.youhuiquan_daodianyouhui));
}else{
holder.couponsTypeImg.setImageDrawable(mContext.getResources().getDrawable(R.drawable.youhuiquan_lingquanyouhui));
}
return convertView;
}

转载于:https://my.oschina.net/u/1395670/blog/475172