Java ListView的Android自定义行项目
我有一个ListView,它的行中应该有以下布局:Java ListView的Android自定义行项目,java,android,android-layout,android-listview,android-arrayadapter,Java,Android,Android Layout,Android Listview,Android Arrayadapter,我有一个ListView,它的行中应该有以下布局: HEADER Text 标题应该是静态的,但是文本每隔几秒钟就会更改一次 我通过填充String[]array,将其传递给ArrayAdapter,并在每次数据更改时进行设置来实现它: data_array = populateString(); adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, android.R.id.te
HEADER
Text
标题
应该是静态的,但是文本
每隔几秒钟就会更改一次
我通过填充String[]array
,将其传递给ArrayAdapter
,并在每次数据更改时进行设置来实现它:
data_array = populateString();
adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, android.R.id.text1, data_array);
listView.setAdapter(adapter);
data_array=populateString();
adapter=new ArrayAdapter(这个,android.R.layout.simple_list_item_1,android.R.id.text1,数据_数组);
setAdapter(适配器);
我的问题是,我不知道如何以上述格式显示数据
提前感谢。您可以按照
BaseAdapter
创建自定义Xml
文件,并将其绑定到BaseAdapter
中,然后使用Listview
填充它。需要根据需要更改Xml
文件。将此row.Xml添加到布局文件夹中
您的java活动
结果
创建资源布局文件列表\u item.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="@+id/header_text"
android:layout_height="0dp"
android:layout_width="fill_parent"
android:layout_weight="1"
android:text="Header"
/>
<TextView
android:id="@+id/item_text"
android:layout_height="0dp"
android:layout_width="fill_parent"
android:layout_weight="1"
android:text="dynamic text"
/>
</LinearLayout>
然后像这样初始化适配器
adapter = new ArrayAdapter<String>(this, R.layout.list_item,R.id.item_text,data_array);
adapter=newarrayadapter(这个,R.layout.list\u项,R.id.item\u文本,数据\u数组);
使用自定义列表视图
您还可以通过自定义背景自定义行的外观。
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:background="#0095FF"> //background color
<ListView android:id="@+id/list"
android:layout_width="fill_parent"
android:layout_height="0dip"
android:focusableInTouchMode="false"
android:listSelector="@android:color/transparent"
android:layout_weight="2"
android:headerDividersEnabled="false"
android:footerDividersEnabled="false"
android:dividerHeight="8dp"
android:divider="#000000"
android:cacheColorHint="#000000"
android:drawSelectorOnTop="false">
</ListView>
row.xml。每行的自定义布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="Header" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="TextView" />
</LinearLayout>
为自定义布局充气。使用视图保持架可平滑滚动并提高性能
。讨论的是android开发者的listview性能
步骤1:创建XML文件
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ListView
android:id="@+id/lvItems"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
</LinearLayout>
步骤3:MainActivity.java
package com.scancode.acutesoft.telephonymanagerapp;
public class Student
{
String email,phone,address;
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}
package com.scancode.acutesoft.telephonymanagerapp;
import android.app.Activity;
import android.os.Bundle;
import android.widget.ListView;
import java.util.ArrayList;
public class MainActivity extends Activity {
ListView lvItems;
ArrayList<Student> studentArrayList ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lvItems = (ListView) findViewById(R.id.lvItems);
studentArrayList = new ArrayList<Student>();
dataSaving();
CustomAdapter adapter = new CustomAdapter(MainActivity.this,studentArrayList);
lvItems.setAdapter(adapter);
}
private void dataSaving() {
Student student = new Student();
student.setEmail("abc@gmail.com");
student.setPhone("1234567890");
student.setAddress("Hyderabad");
studentArrayList.add(student);
student = new Student();
student.setEmail("xyz@gmail.com");
student.setPhone("1234567890");
student.setAddress("Banglore");
studentArrayList.add(student);
student = new Student();
student.setEmail("xyz@gmail.com");
student.setPhone("1234567890");
student.setAddress("Banglore");
studentArrayList.add(student);
student = new Student();
student.setEmail("xyz@gmail.com");
student.setPhone("1234567890");
student.setAddress("Banglore");
studentArrayList.add(student);
}
}
package com.scancode.acutesoft.telephonymanagerapp;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import java.util.ArrayList;
public class CustomAdapter extends BaseAdapter
{
ArrayList<Student> studentList;
Context mContext;
public CustomAdapter(Context context, ArrayList<Student> studentArrayList) {
this.mContext = context;
this.studentList = studentArrayList;
}
@Override
public int getCount() {
return studentList.size();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
Student student = studentList.get(position);
convertView = LayoutInflater.from(mContext).inflate(R.layout.student_row,null);
TextView tvStudEmail = (TextView) convertView.findViewById(R.id.tvStudEmail);
TextView tvStudPhone = (TextView) convertView.findViewById(R.id.tvStudPhone);
TextView tvStudAddress = (TextView) convertView.findViewById(R.id.tvStudAddress);
tvStudEmail.setText(student.getEmail());
tvStudPhone.setText(student.getPhone());
tvStudAddress.setText(student.getAddress());
return convertView;
}
}
package com.scancode.acutesoft.telephonymanagerap;
导入android.app.Activity;
导入android.os.Bundle;
导入android.widget.ListView;
导入java.util.ArrayList;
公共类MainActivity扩展了活动{
列表视图项目;
ArrayList学生ArrayList;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lvItems=(ListView)findViewById(R.id.lvItems);
studentArrayList=新ArrayList();
数据保存();
CustomAdapter=新的CustomAdapter(MainActivity.this,studentArrayList);
lvItems.setAdapter(适配器);
}
私有void数据保存(){
学生=新生();
student.setEmail(“abc@gmail.com");
学生电话(“1234567890”);
学生地址(“海得拉巴”);
studentArrayList.add(学生);
学生=新学生();
student.setEmail(“xyz@gmail.com");
学生电话(“1234567890”);
学生地址(“Banglore”);
studentArrayList.add(学生);
学生=新学生();
student.setEmail(“xyz@gmail.com");
学生电话(“1234567890”);
学生地址(“Banglore”);
studentArrayList.add(学生);
学生=新学生();
student.setEmail(“xyz@gmail.com");
学生电话(“1234567890”);
学生地址(“Banglore”);
studentArrayList.add(学生);
}
}
步骤4:CustomAdapter.java
package com.scancode.acutesoft.telephonymanagerapp;
public class Student
{
String email,phone,address;
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}
package com.scancode.acutesoft.telephonymanagerapp;
import android.app.Activity;
import android.os.Bundle;
import android.widget.ListView;
import java.util.ArrayList;
public class MainActivity extends Activity {
ListView lvItems;
ArrayList<Student> studentArrayList ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lvItems = (ListView) findViewById(R.id.lvItems);
studentArrayList = new ArrayList<Student>();
dataSaving();
CustomAdapter adapter = new CustomAdapter(MainActivity.this,studentArrayList);
lvItems.setAdapter(adapter);
}
private void dataSaving() {
Student student = new Student();
student.setEmail("abc@gmail.com");
student.setPhone("1234567890");
student.setAddress("Hyderabad");
studentArrayList.add(student);
student = new Student();
student.setEmail("xyz@gmail.com");
student.setPhone("1234567890");
student.setAddress("Banglore");
studentArrayList.add(student);
student = new Student();
student.setEmail("xyz@gmail.com");
student.setPhone("1234567890");
student.setAddress("Banglore");
studentArrayList.add(student);
student = new Student();
student.setEmail("xyz@gmail.com");
student.setPhone("1234567890");
student.setAddress("Banglore");
studentArrayList.add(student);
}
}
package com.scancode.acutesoft.telephonymanagerapp;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import java.util.ArrayList;
public class CustomAdapter extends BaseAdapter
{
ArrayList<Student> studentList;
Context mContext;
public CustomAdapter(Context context, ArrayList<Student> studentArrayList) {
this.mContext = context;
this.studentList = studentArrayList;
}
@Override
public int getCount() {
return studentList.size();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
Student student = studentList.get(position);
convertView = LayoutInflater.from(mContext).inflate(R.layout.student_row,null);
TextView tvStudEmail = (TextView) convertView.findViewById(R.id.tvStudEmail);
TextView tvStudPhone = (TextView) convertView.findViewById(R.id.tvStudPhone);
TextView tvStudAddress = (TextView) convertView.findViewById(R.id.tvStudAddress);
tvStudEmail.setText(student.getEmail());
tvStudPhone.setText(student.getPhone());
tvStudAddress.setText(student.getAddress());
return convertView;
}
}
package com.scancode.acutesoft.telephonymanagerap;
导入android.content.Context;
导入android.view.LayoutInflater;
导入android.view.view;
导入android.view.ViewGroup;
导入android.widget.BaseAdapter;
导入android.widget.TextView;
导入java.util.ArrayList;
公共类CustomAdapter扩展了BaseAdapter
{
ArrayList学生名单;
语境;
公共CustomAdapter(上下文上下文,ArrayList studentArrayList){
this.mContext=上下文;
this.studentList=studentArrayList;
}
@凌驾
public int getCount(){
return studentList.size();
}
@凌驾
公共对象getItem(int位置){
返回位置;
}
@凌驾
公共长getItemId(int位置){
返回位置;
}
@凌驾
公共视图getView(int位置、视图转换视图、视图组父视图){
学生=学生列表。获取(位置);
convertView=LayoutFlater.from(mContext).充气(R.layout.student_行,空);
TextView-tvStudEmail=(TextView)convertView.findViewById(R.id.tvStudEmail);
TextView-tvStudPhone=(TextView)convertView.findViewById(R.id.tvStudPhone);
TextView tvStudAddress=(TextView)convertView.findViewById(R.id.tvStudAddress);
tvStudEmail.setText(student.getEmail());
tvStudPhone.setText(student.getPhone());
tvstuddress.setText(student.getAddress());
返回视图;
}
}
选中“创建自定义适配器并重写getView()方法”以满足您的需要您必须将baseadapter与xml布局一起用于列表视图中的行,您必须创建自定义布局。使用片段时,应使用什么参数来代替作为适配器构造函数方法“listview.setAdapter”的第一个参数的上下文(新建yourAdapter(这个,新字符串[]{“data1”,“data2”}));“很抱歉这么晚了,但是当我尝试使用.setText时,我得到了null。你知道它是什么吗?@Novalink这意味着TextView text=(TextView)vi.findViewById(R.id.text);
为空,你确定R.id.text
在那里吗?我的row.xml看起来很像,只是有一个text1和text2。@Novalink发布一个新问题并向我发送链接请这是我找到的最简单的方法,在第一次尝试时对我有效。目标Api级别16.OnCreate after ll.SetAdapter(cus)应用程序突然停止工作是崩溃吗?如果是,崩溃
package com.scancode.acutesoft.telephonymanagerapp;
import android.app.Activity;
import android.os.Bundle;
import android.widget.ListView;
import java.util.ArrayList;
public class MainActivity extends Activity {
ListView lvItems;
ArrayList<Student> studentArrayList ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lvItems = (ListView) findViewById(R.id.lvItems);
studentArrayList = new ArrayList<Student>();
dataSaving();
CustomAdapter adapter = new CustomAdapter(MainActivity.this,studentArrayList);
lvItems.setAdapter(adapter);
}
private void dataSaving() {
Student student = new Student();
student.setEmail("abc@gmail.com");
student.setPhone("1234567890");
student.setAddress("Hyderabad");
studentArrayList.add(student);
student = new Student();
student.setEmail("xyz@gmail.com");
student.setPhone("1234567890");
student.setAddress("Banglore");
studentArrayList.add(student);
student = new Student();
student.setEmail("xyz@gmail.com");
student.setPhone("1234567890");
student.setAddress("Banglore");
studentArrayList.add(student);
student = new Student();
student.setEmail("xyz@gmail.com");
student.setPhone("1234567890");
student.setAddress("Banglore");
studentArrayList.add(student);
}
}
package com.scancode.acutesoft.telephonymanagerapp;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import java.util.ArrayList;
public class CustomAdapter extends BaseAdapter
{
ArrayList<Student> studentList;
Context mContext;
public CustomAdapter(Context context, ArrayList<Student> studentArrayList) {
this.mContext = context;
this.studentList = studentArrayList;
}
@Override
public int getCount() {
return studentList.size();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
Student student = studentList.get(position);
convertView = LayoutInflater.from(mContext).inflate(R.layout.student_row,null);
TextView tvStudEmail = (TextView) convertView.findViewById(R.id.tvStudEmail);
TextView tvStudPhone = (TextView) convertView.findViewById(R.id.tvStudPhone);
TextView tvStudAddress = (TextView) convertView.findViewById(R.id.tvStudAddress);
tvStudEmail.setText(student.getEmail());
tvStudPhone.setText(student.getPhone());
tvStudAddress.setText(student.getAddress());
return convertView;
}
}