Android 新闻界面模拟ListView和ViewPager的应用

<?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="100dp"  android:padding="10dp">  <ImageView    android:layout_width="100dp"    android:layout_height="60dp"    android:id="@+id/imageView"    android:background="@mipmap/ic_launcher"    android:layout_centerVertical="true"    android:layout_alignParentRight="true" />  <TextView    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="New Text"    android:id="@+id/tv_title"    android:maxLines="3"    android:layout_marginRight="10dp"    android:layout_alignParentTop="true"    android:layout_alignParentLeft="true"    android:layout_toLeftOf="@+id/imageView" />  <TextView    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:textAppearance="?android:attr/textAppearanceSmall"    android:text="Small Text"    android:id="@+id/tv_time"    android:layout_alignParentBottom="true"    android:layout_alignParentLeft="true"/></RelativeLayout>activity_item

<?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:padding="10dp">  <TextView    android:id="@+id/tv_title"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:text="@string/app_name"    android:singleLine="true"/>  <LinearLayout    android:id="@+id/line1"    android:layout_width="match_parent"    android:layout_height="60dp"    android:layout_below="@id/tv_title"    android:layout_marginTop="10dp">    <ImageView      android:id="@+id/imageView1"      android:layout_width="100dp"      android:layout_height="60dp"      android:layout_weight="1"      android:layout_marginRight="10dp"      android:background="@mipmap/ic_launcher" />    <ImageView      android:id="@+id/imageView2"      android:layout_width="100dp"      android:layout_height="60dp"      android:layout_weight="1"      android:layout_marginRight="10dp"      android:background="@mipmap/ic_launcher" />    <ImageView      android:id="@+id/imageView3"      android:layout_width="100dp"      android:layout_height="60dp"      android:layout_weight="1"      android:background="@mipmap/ic_launcher" />  </LinearLayout>  <TextView    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:textAppearance="?android:attr/textAppearanceSmall"    android:text="Small Text"    android:id="@+id/tv_time"    android:layout_below="@id/line1"    android:layout_alignParentLeft="true"/></RelativeLayout>activity_item2

<?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="match_parent">  <android.support.v4.view.ViewPager    android:id="@+id/vp"    android:layout_width="match_parent"    android:layout_height="200dp" />  <TextView    android:id="@+id/tv_msg"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_centerHorizontal="true"    android:layout_marginBottom="5dp"    android:layout_alignBottom="@+id/vp"    android:textColor="#ddd"    android:text="吴建明和中国外交"    android:singleLine="true" /></RelativeLayout>activity_item_header

<?xml version="1.0" encoding="utf-8"?><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"  android:padding="10dp"  tools:context="com.dragon.android.baseadapter.MainActivity">  <ListView    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:scrollbars="none"    android:dividerHeight="1dp"    android:divider="#ccc"    android:id="@+id/listView"/></RelativeLayout>activity_main

<?xml version="1.0" encoding="utf-8"?><resources>  <string-array name="titles">    <item>那些被捕上岸的不寻常的大鱼，往往成为大家关注的焦点。一种奇观和一段足以津津乐道的传奇经历。</item>    <item>自2008年正式推出，杭州公共自行车在国内外圈粉无数，它超越了一道风景、一张名片的定义，成为杭州的生活方式。</item>    <item>奥运历史上，像美国队单独重赛这样荒诞的场面也不时出现。</item>    <item>在巴西里约奥运赛场上，菲尔普斯身上“神秘的东方红圈”走红。</item>    <item>里约奥运会正式启幕，为国出征的运动员激战正酣。而在奥运赛场之外，一大波隐藏的民间运动高手也蠢蠢欲动。</item>    <item>6月30日以来，第四轮强降雨给湖北造成严重损失。</item>    <item>查阅世界上城市地下排水系统中的佼佼者，可以发现，那些真正的良心下水道，即使多年过去，仍在发挥效用。</item>  </string-array>  <string-array name="msgs">    <item>吴建明和中国外交</item>    <item>同性恋酒吧：是天堂也是地狱</item>    <item>那些年，我们这样过端午</item>    <item>马英九8年：从万人迷到受气包</item>    <item>朝鲜外宣里的幸福平壤</item>  </string-array></resources>arrays

package com.dragon.android.baseadapter;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.TextView;import java.text.SimpleDateFormat;import java.util.Date;import java.util.List;import java.util.Locale;/** * Created by Auser on 2016/9/8. */public class MyAdapter extends BaseAdapter {  private final Context context;  private List<Data> mData;  public MyAdapter(Context context, List<Data> data) {    this.mData = data;    this.context = context;  }  /**   * @return item 的数量   */  @Override  public int getCount() {    return mData == null ? 0 : mData.size();  }  /**   * @param position   * @param convertView <重点： 得到每个 Item 将要显示的视图   * @param parent   * @return   */  @Override  public View getView(int position, View convertView, ViewGroup parent) {    View view;    Data data = getItem(position);    if (position % 3 == 0) {      view = LayoutInflater.from(context).inflate(R.layout.acyivity_item_2, parent, false);      ImageView imageView1 = (ImageView) view.findViewById(R.id.imageView1);      ImageView imageView2 = (ImageView) view.findViewById(R.id.imageView2);      ImageView imageView3 = (ImageView) view.findViewById(R.id.imageView3);      imageView1.setImageResource(data.getImgResId()[0]);      imageView2.setImageResource(data.getImgResId()[1]);      imageView3.setImageResource(data.getImgResId()[2]);    } else {      view = LayoutInflater.from(context).inflate(R.layout.activity_item, parent, false);      ImageView imageView = (ImageView) view.findViewById(R.id.imageView);      imageView.setImageResource(data.getImgResId()[0]);    }    TextView tv_title = (TextView) view.findViewById(R.id.tv_title);    tv_title.setText(data.getTitle());    TextView tv_time = (TextView) view.findViewById(R.id.tv_time);    String time = new SimpleDateFormat("HH:mm", Locale.CHINA).format(new Date(data.getTime()));    tv_time.setText(time);    return view;  }  /**   * 给开发者自己实现，一般用来的二道当前 position 位置的 数据   * 当 Item 可以在屏幕显示的时候，会调用 getView 且传递显示的 Item 的位置   *   * @param position 新显示的 Item 的位置   * @return   */  @Override  public Data getItem(int position) {    // Log.d("TAG", position + "");    return mData.get(position);  }  /**   * @param position 当用户设置了 ListView 的Item 的点击时间的时候，将此值作为 第四个参数 传递   * @return   */  @Override  public long getItemId(int position) {    return 10086;  }}MyAdapter

package com.dragon.android.baseadapter;import android.support.v4.view.PagerAdapter;import android.view.View;import android.view.ViewGroup;import android.widget.ImageView;import java.util.List;/** * Created by Auser on 2016/9/8. */class MyPagerAdapter extends PagerAdapter {  private List<ImageView> mList;  public MyPagerAdapter(List<ImageView> mList) {    this.mList = mList;  }  /**   * 决定ViewPager中能够显示几个子视图   * @return 可滑动的边界   */  @Override  public int getCount() {    // 2的31次方-1    // mList.size=5:0--4    // position:0---9    // 0%5=0,4%5=4,    // 5%5=0,6%5=1....9%5=4    return Integer.MAX_VALUE;  }  /**   * 产生item.container:容器.--->ViewPager   * @param container   * @param position   * @return   */  @Override  public Object instantiateItem(ViewGroup container, int position) {    // 将ImageView添加到ViewPager容器中.    container.addView(mList.get(position % mList.size()));    return mList.get(position % mList.size());  }  /**   * 判断当前的view是否是第一次产生的.   * @param view   * @param obj   * @return   */  @Override  public boolean isViewFromObject(View view, Object obj) {    return view == obj;  }  /**   * 移除一个item   * @param container   * @param position   * @param object   */  @Override  public void destroyItem(ViewGroup container, int position, Object object) {    // 从容器中移除视图    container.removeView(mList.get(position % mList.size()));  }}MyPagerAdapter

package com.dragon.android.baseadapter;import java.util.Arrays;/** * Created by Auser on 2016/9/8. */public class Data {  private int[] imgResId;  private String title;  private long time;  @Override  public String toString() {    return "Data{" +        "imgResId=" + Arrays.toString(imgResId) +        ", title='" + title + '/'' +        ", time=" + time +        '}';  }  public Data() {  }  public Data(String title, int[] imgResId, long time) {    this.imgResId = imgResId;    this.title = title;    this.time = time;  }  public int[] getImgResId() {    return imgResId;  }  public void setImgResId(int[] imgResId) {    this.imgResId = imgResId;  }  public String getTitle() {    return title;  }  public void setTitle(String title) {    this.title = title;  }  public long getTime() {    return time;  }  public void setTime(long time) {    this.time = time;  }}Data

package com.dragon.android.baseadapter;import android.os.Bundle;import android.support.v4.view.ViewPager;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.ImageView;import android.widget.ListView;import android.widget.TextView;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity {  private ListView listView;  private List<Data> mData;  private List<ImageView> mList;  private ViewPager mVp;  private TextView mTv;  private int[] imgResIds = {R.mipmap.c1, R.mipmap.c2, R.mipmap.c3,      R.mipmap.c4, R.mipmap.c5, R.mipmap.c6, R.mipmap.c7, R.mipmap.c8,      R.mipmap.c9, R.mipmap.c10, R.mipmap.c11, R.mipmap.c12, R.mipmap.c13};  private int[] imageHeaderIds = {R.mipmap.a1,R.mipmap.a2,R.mipmap.a3,R.mipmap.a4,R.mipmap.a5};  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    listView = (ListView) findViewById(R.id.listView);    String[] stringArray = getResources().getStringArray(R.array.titles);    mData = new ArrayList<>();    initData(stringArray);    addHeader();    MyAdapter myAdapter = new MyAdapter(this, mData);    listView.setAdapter(myAdapter);  }  /**   * 添加头部布局 ViewPager   */  private void addHeader() {    View view = getLayoutInflater().from(this).inflate(R.layout.activity_item_header, listView, false);    listView.addHeaderView(view);    mVp = (ViewPager) view.findViewById(R.id.vp);    mTv = (TextView) view.findViewById(R.id.tv_msg);    String[] msgs = getResources().getStringArray(R.array.msgs);    // 创建数据源.存放头部布局要展示的视图    mList = new ArrayList<ImageView>();    for (int i = 0; i < imageHeaderIds.length; i++) {      ImageView iv = new ImageView(this);      iv.setBackgroundResource(imageHeaderIds[i]);      mList.add(iv);    }    MyPagerAdapter adapter = new MyPagerAdapter(mList);    mVp.setAdapter(adapter);    // 设置ViewPager当前是第几个视图    mVp.setCurrentItem(1000 * mList.size());    // mVp.setOnPageChangeListener(listener);    mVp.addOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {      @Override      public void onPageSelected(int position) {        String[] msgs = getResources().getStringArray(R.array.msgs);        // 让标题随着ViewPager的切换而切换        mTv.setText(msgs[position % mList.size()]);      }    });  }  /**   * 创建数据源   * @param stringArray   */  private void initData(String[] stringArray) {    int j = 0;    for (int i = 0; i < stringArray.length; i++) {      long l = System.currentTimeMillis();      if (i % 3 == 0) {        mData.add(new Data(stringArray[i], new int[]{imgResIds[j++], imgResIds[j++], imgResIds[j++]}, l + 1000000 * i));      } else {        mData.add(new Data(stringArray[i], new int[]{imgResIds[j++]}, l + 1000000 * i));      }    }  }}