Android实现简单卡片布局

GoogleNow是Android4.1全新推出的一款应用他，它可以全面了解你的使用习惯，并为你提供现在或者未来可能用到的各种信息，GoogleNow提供的信息关联度较高，几乎是瞬间返回答案，总而言之，GoogleNow是Google提出的全新搜索概念。当然，GoogleNow最为引人注目的当属它的卡片式设计。Google自家应用纷纷采用卡片布局(Google Now,Google Plus,Google Play)。

在最新的QQ空间、新浪微博、豌豆荚中也可以见到卡片式设计的影子

下面介绍一种简单实现卡片布局的方式

list_item.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 tools:context=".MainActivity"
 android:background="@drawable/radius_bg">

 <ImageView
 android:id="@+id/iv_logo"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_alignParentLeft="true"
 android:layout_margin="8dp"
 android:src="@drawable/ic_launcher" />

 <TextView
 android:id="@+id/tv_name"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_alignTop="@id/iv_logo"
 android:layout_toRightOf="@id/iv_logo"
 android:text="@string/hello_world"
 android:textSize="16sp" />

 <TextView
 android:id="@+id/tv_desc"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_below="@id/tv_name"
 android:layout_marginTop="5dp"
 android:layout_toRightOf="@id/iv_logo"
 android:text="@string/hello_world"
 android:textSize="13sp" />

</RelativeLayout>

自定义Shape图片radius_bg.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
 <corners android:radius="3dp"/>
 <solid android:color="#ffffff"/>
</shape>

主界面布局

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 tools:context=".MainActivity"
 android:background="#e6e6e6">

 <ListView
 android:id="@+id/mListView"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:divider="@android:color/transparent"
 android:paddingLeft="10dp"
 android:paddingRight="10dp"
 android:paddingTop="2dp"
 android:paddingBottom="2dp"
 android:dividerHeight="10dp" >
 </ListView> 

</RelativeLayout>

Card实体

package com.example.carduitest.model;

public class Card {
 private String name;
 private String desc;
 private int icon;

 public Card(String name, String desc) {
 this.name = name;
 this.desc = desc;
 }

 public String getName() {
 return name;
 }
 public void setName(String name) {
 this.name = name;
 }
 public String getDesc() {
 return desc;
 }
 public void setDesc(String desc) {
 this.desc = desc;
 }
 public int getIcon() {
 return icon;
 }
 public void setIcon(int icon) {
 this.icon = icon;
 }
}

自定义适配器

package com.example.carduitest.adapter;

import java.util.List;

import com.example.carduitest.R;
import com.example.carduitest.model.Card;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

public class CardAdapter extends BaseAdapter {
 private List<Card> data;
 private Context context;
 private LayoutInflater mInflater;

 public CardAdapter(List<Card> data, Context context) {
 this.data = data;
 this.context = context;
 mInflater = LayoutInflater.from(context);
 }

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

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

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

 @Override
 public View getView(int position, View convertView, ViewGroup parent) {
 ViewHolder holder;
 if(convertView==null){
 convertView = mInflater.inflate(R.layout.list_item, null);

 holder = new ViewHolder();
 holder.tv_name = (TextView) convertView.findViewById(R.id.tv_name);
 holder.tv_desc = (TextView) convertView.findViewById(R.id.tv_desc);

 convertView.setTag(holder);
 }else{
 holder = (ViewHolder) convertView.getTag();
 }

 Card card = data.get(position);
 holder.tv_name.setText(card.getName());
 holder.tv_desc.setText(card.getDesc());

 return convertView;
 }

 static class ViewHolder{
 TextView tv_name;
 TextView tv_desc;
 }

}

package com.example.carduitest;

import java.util.ArrayList;
import java.util.List;

import com.example.carduitest.adapter.CardAdapter;
import com.example.carduitest.model.Card;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.ListView;

public class MainActivity extends Activity {

 private List<Card> data = new ArrayList<Card>();

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);

 initData();
 ListView mListView = (ListView) findViewById(R.id.mListView);

 CardAdapter mAdapter = new CardAdapter(data,this);
 mListView.setAdapter(mAdapter);
 }

 private void initData() {

 for(int i=0;i<50;i++){
 Card card = new Card("Card UI Example "+i, "Very Good");
 data.add(card);
 }
 }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
 // Inflate the menu; this adds items to the action bar if it is present.
 getMenuInflater().inflate(R.menu.main, menu);
 return true;
 }

}

运行效果如下：

p>

当然啦，Github上面也有专门的实现card的library，这里列举两个不错的library

cardslib：地址

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