前两节关于ListView的，已经使用了ArrayAdapter，SimpleAdapter了，两个比较基本的适配器
这里来用一个用的最多的一个适配器BaseAdapter。
还是先上效果图。大概和微博首页差不多的
上代码：创建主页面 activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"> <ListView
android:id="@+id/list_item"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</android.support.constraint.ConstraintLayout>
创建 ListView 要显示的内容页面：listview_item.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"> <ImageView
android:id="@+id/imageView"
android:layout_width="64dp"
android:layout_height="64dp"
app:srcCompat="@android:color/holo_blue_light" /> <!-- 定义一个竖直方向的LinearLayout,把QQ呢称与说说的文本框设置出来 --> <LinearLayout
android:id="@+id/new_line"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"> <TextView
android:id="@+id/name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="8px"
android:textColor="#1D1D1C"
android:textSize="20sp" /> <TextView
android:id="@+id/says"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="8px"
android:textColor="#B4B4B9"
android:textSize="14sp" /> <TextView
android:id="@+id/times"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="TextView"
android:textSize="14sp"/> <ImageView
android:id="@+id/image"
android:layout_width="223dp"
android:layout_height="170dp"
app:srcCompat="@drawable/ic_launcher_background" /> </LinearLayout> </LinearLayout>
创建一个dto类：
package action.sun.com.listview3;
public class Animal {
private String aName;
private String aSpeak;
private int aIcon;
private String time;
private int Image;
public Animal(String aName, String aSpeak, int aIcon,String atime,int aImage) {
this.aName = aName;
this.aSpeak = aSpeak;
this.aIcon = aIcon;
this.time = atime;
this.Image = aImage;
}
public String getaName() {
return aName;
}
public String getaSpeak() {
return aSpeak;
}
public int getaIcon() {
return aIcon;
}
public String getTime() {
return time;
}
public int getaImage() {
return Image;
}
public void setaName(String aName) {
this.aName = aName;
}
public void setaSpeak(String aSpeak) {
this.aSpeak = aSpeak;
}
public void setaIcon(int aIcon) {
this.aIcon = aIcon;
}
public void setTime(String time) {
this.time = time;
}
public void setImage(int Image) {
this.Image = Image;
}
}创建一个适配器：
package action.sun.com.listview3; 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.util.LinkedList; public class AnimalAdapter extends BaseAdapter {
private LinkedList<Animal> mData;
private Context mContext; public AnimalAdapter(LinkedList<Animal> mData, Context mContext) {
this.mData = mData;
this.mContext = mContext;
} //listview 总数
@Override
public int getCount() {
return mData.size();
} @Override
public Object getItem(int i) {
return null;
} @Override
public long getItemId(int i) {
return i;
} // 视图
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
view = LayoutInflater.from(mContext).inflate(R.layout.listview_item,viewGroup,false); ImageView img_icon = (ImageView) view.findViewById(R.id.imageView);
TextView txt_aName = (TextView) view.findViewById(R.id.name);
TextView txt_aSpeak = (TextView) view.findViewById(R.id.says);
TextView txt_times = (TextView) view.findViewById(R.id.times);
ImageView txt_image = (ImageView) view.findViewById(R.id.image); img_icon.setBackgroundResource(mData.get(i).getaIcon());
txt_aName.setText(mData.get(i).getaName());
txt_aSpeak.setText(mData.get(i).getaSpeak());
txt_times.setText(mData.get(i).getTime());
txt_image.setBackgroundResource(mData.get(i).getaImage());
return view;
}
}
主类MainActivity:
package action.sun.com.listview3; import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ListView; import java.util.LinkedList;
import java.util.List; public class MainActivity extends AppCompatActivity { private List<Animal> mData = null;
private Context mContext;
private AnimalAdapter mAdapter = null;
private ListView list_animal; @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mContext = MainActivity.this; list_animal = (ListView) findViewById(R.id.list_item); mData = new LinkedList<Animal>();
mData.add(new Animal("Tom", "22222", R.mipmap.ic_launcher,"1天前",R.drawable.ic_launcher_background));
mData.add(new Animal("Jack", "33333333", R.mipmap.ic_launcher,"2天前",R.drawable.ic_launcher_background));
mData.add(new Animal("Json", "4444444", R.mipmap.ic_launcher,"3天前",R.drawable.ic_launcher_background));
mData.add(new Animal("Kumi", "1121313", R.mipmap.ic_launcher,"4天前",R.drawable.ic_launcher_background));
mData.add(new Animal("Timi", "88888", R.mipmap.ic_launcher,"5天前",R.drawable.ic_launcher_background));
mAdapter = new AnimalAdapter((LinkedList<Animal>) mData, mContext);
list_animal.setAdapter(mAdapter);
}
}
代码完毕，运行即可。