Android 从EditText更新的ListView
我有一个自定义列表视图,它是从对话框中的Android 从EditText更新的ListView,android,android-adapter,custom-lists,Android,Android Adapter,Custom Lists,我有一个自定义列表视图,它是从对话框中的EditText组件更新的。我的自定义行、适配器类和自定义对话框都在工作,但我似乎无法触发adatper类中的代码,该代码将编辑文本控件中的文本添加到列表中。这是我的活动代码,如果需要适配器代码,请告诉我。在我将自定义行和适配器添加到列表中之前,它起作用了:( 问题的症状:emailAdapter.notifyDataSetChanged();不执行任何操作 public class InvitePlayers_Activity extends Activ
EditText
组件更新的。我的自定义行、适配器类和自定义对话框都在工作,但我似乎无法触发adatper类中的代码,该代码将编辑文本控件中的文本添加到列表中。这是我的活动代码,如果需要适配器代码,请告诉我。在我将自定义行和适配器添加到列表中之前,它起作用了:(
问题的症状:emailAdapter.notifyDataSetChanged();
不执行任何操作
public class InvitePlayers_Activity extends Activity {
ListViewAdapter emailAdapter = null;
ImageView imgView_mail;
ImageView imgView_confirm;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.requestWindowFeature(Window.FEATURE_NO_TITLE); //remove title bar
setContentView(R.layout.activity_inviteplayers);
//Generate list View from ArrayList
displayListView();
}
private void displayListView() {
//assign controls
final ListView listView = (ListView) findViewById(R.id.listView_invitePlayers);
imgView_mail = (ImageView)findViewById(R.id.imgView_mail);
//Test data
ArrayList<String> inviteNew = new ArrayList<String>();
final ArrayList<ArrayList<String>> inviteList = new ArrayList<ArrayList<String>>();
emailAdapter = new ListViewAdapter(this,inviteList);
listView.setAdapter(emailAdapter);
// Assign adapter to ListView
listView.setTextFilterEnabled(true);
//Edit listeners
imgView_mail.setOnClickListener(new View.OnClickListener() {
public void onClick(View view)
{
//variables
final String enteredMail = "testListViewEntry";
final ArrayList<ArrayList<String>> inviteList = new ArrayList<ArrayList<String>>();
ArrayList<String> invite = new ArrayList<String>();
invite.add(0, enteredMail);//add first email
invite.add(1,"icon_invitestatussent.png"); //add first status icon
inviteList.add(invite);
emailAdapter.notifyDataSetChanged();
listView.setAdapter(emailAdapter);
}
});
}
}
public class\u活动扩展活动{
ListViewAdapter emailAdapter=null;
ImageView imgView_邮件;
ImageView imgView\u确认;
@凌驾
创建时的公共void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);//删除标题栏
setContentView(R.layout.activity\u);
//从ArrayList生成列表视图
displayListView();
}
私有void displayListView(){
//分配控件
最终ListView ListView=(ListView)findViewById(R.id.ListView\u);
imgView_-mail=(ImageView)findViewById(R.id.imgView_-mail);
//测试数据
ArrayList inviteNew=新的ArrayList();
最终ArrayList inviteList=新ArrayList();
emailAdapter=新的ListViewAdapter(此为邀请列表);
setAdapter(emailAdapter);
//将适配器分配给ListView
setTextFilterEnabled(true);
//编辑侦听器
imgView_mail.setOnClickListener(新视图.OnClickListener(){
公共void onClick(视图)
{
//变数
输入的最终字符串mail=“testListViewEntry”;
最终ArrayList inviteList=新ArrayList();
ArrayList invite=新建ArrayList();
invite.add(0,enteredMail);//添加第一封电子邮件
invite.add(1,“icon_invitestatussent.png”);//添加第一个状态图标
inviteList.add(invite);
emailAdapter.notifyDataSetChanged();
setAdapter(emailAdapter);
}
});
}
}
请求的适配器代码
public class ListViewAdapter extends BaseAdapter {
private Activity context;
ArrayList<ArrayList<String>> inviteDetails = new ArrayList<ArrayList<String>>();
public ListViewAdapter(Activity context, ArrayList<ArrayList<String>> inviteDetails ) {
this.inviteDetails = inviteDetails;
this.context = context;
}
@Override
public int getCount() {
return inviteDetails.size();
}
@Override
public Object getItem(int i) {
return inviteDetails.get(i).get(0);
}
@Override
public long getItemId(int i) {
return i;
}
public View getView(int position, View view, ViewGroup parent){
//Inflater
LayoutInflater inflater = context.getLayoutInflater();
//get row view
if (view == null) {
LayoutInflater mInflater = (LayoutInflater)
context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
view = mInflater.inflate(R.layout.list_item_email, null);
}
//assign controls
final TextView textView_playerEmail = (TextView) view.findViewById(R.id.textView_playerEmail);
ImageView imgView_inviteStatus = (ImageView) view.findViewById(R.id.imgView_inviteStatus);
//Assign control values that are dynamic
textView_playerEmail.setText(inviteDetails.get(position).get(0));
imgView_inviteStatus.setImageResource(R.drawable.icon_invitestatussent);
return view;
}
@Override
public void notifyDataSetChanged() {
super.notifyDataSetChanged();
}
}
公共类ListViewAdapter扩展了BaseAdapter{
私人活动语境;
ArrayList inviteDetails=新建ArrayList();
公共ListViewAdapter(活动上下文、ArrayList详细信息){
this.inviteDetails=inviteDetails;
this.context=上下文;
}
@凌驾
public int getCount(){
返回inviteDetails.size();
}
@凌驾
公共对象getItem(int i){
返回inviteDetails.get(i).get(0);
}
@凌驾
公共长getItemId(int i){
返回i;
}
公共视图getView(内部位置、视图视图、视图组父视图){
//充气机
LayoutInflater充气器=上下文。getLayoutInflater();
//获取行视图
如果(视图==null){
LayoutInflater mInflater=(LayoutInflater)
context.getSystemService(Activity.LAYOUT\u INFLATER\u SERVICE);
视图=mInflater.flate(R.layout.list\u item\u email,空);
}
//分配控件
final TextView TextView_playerEmail=(TextView)view.findViewById(R.id.TextView_playerEmail);
ImageView imgView_inviteStatus=(ImageView)view.findViewById(R.id.imgView_inviteStatus);
//指定动态的控制值
textView_playerEmail.setText(inviteDetails.get(position.get(0));
imgView\u inviteStatus.setImageResource(R.drawable.icon\u invitestatussent);
返回视图;
}
@凌驾
public void notifyDataSetChanged(){
super.notifyDataSetChanged();
}
}
自定义行xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="10dp"
android:textSize="16sp"
android:id="@+id/textView_playerEmail"
android:textColor="@color/white"
android:text="item1">
</TextView>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/imgView_inviteStatus" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/imgView_remove"
android:src="@drawable/btn_cancel" />
</LinearLayout>
活动布局
好吧,就我们讨论的内容而言,你想要这样的东西: 当您想要定制
列表视图时,您必须编写自己的适配器
此自定义适配器将控制我的数据模型,并将数据膨胀到我的列表视图
行
首先,我将创建自定义行的XML
item_mail.xml
<?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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Test text"
android:id="@+id/tv_mail"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_centerVertical="true"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/iv_icon"
android:layout_alignParentTop="true"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:src="@android:drawable/ic_menu_report_image" />
</RelativeLayout>
<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:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">
<TextView
android:text="@string/hello_world"
android:id="@+id/tv_header"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@+id/tv_header">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Add mail"
android:id="@+id/button"
android:layout_gravity="center" />
<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/listView" />
</LinearLayout>
</RelativeLayout>
MainActivity.java
public class MailAdapter extends BaseAdapter {
private static final String LOG_TAG = MailAdapter.class.getSimpleName();
private Context context_;
private ArrayList<ArrayList<String>> mailitems;
public MailAdapter(Context context, ArrayList<ArrayList<String>> mailitems) {
this.context_ = context;
this.mailitems = mailitems;
}
@Override
public int getCount() {
return mailitems.size();
}
@Override
public Object getItem(int position) {
return mailitems.get(position).get(0);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater mInflater = (LayoutInflater)
context_.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
convertView = mInflater.inflate(R.layout.item_mail, null);
}
TextView tv_mail = (TextView) convertView.findViewById(R.id.tv_mail);
ImageView iv_icon = (ImageView) convertView.findViewById(R.id.iv_icon);
String mail = mailitems.get(position).get(0);
String icon = mailitems.get(position).get(1);
Log.d(LOG_TAG,"Mail: " + mail + " mail_icon: " + icon);
tv_mail.setText(mail);
// iv_icon.setImageURI(); Here you can do whatever logic you want to update your image, using URI's, ID's, or something else.
return convertView;
}
}
public class MainActivity extends ActionBarActivity {
private int numMail = 1; // Dummy int to create my items with different numbers.
private MailAdapter mailAdapter; // Your custom adapter.
private ArrayList<ArrayList<String>> mailItems; // This is going to be your data structure, everytime you change it, call the notifyDataSetChanged() method.
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button bt = (Button) findViewById(R.id.button);
ListView lv_mail = (ListView) findViewById(R.id.listView);
mailItems = new ArrayList<>();
mailAdapter = new MailAdapter(this,mailItems);
lv_mail.setAdapter(mailAdapter);
bt.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
addItem(); // The method I'm using to insert the item. Look for it below.
}
});
}
// Here I'm creating a new ArrayList, and appending it to my 'mailItems' Array. After that, I'm notifying the adapter that my data changed.
private void addItem() {
ArrayList<String> mail = new ArrayList<>();
mail.add(0,"mail " + numMail++);
mail.add(1,"path_to_image"); // Depending on what you want to do, put your path, URI, or whatever other way you want to store that image data.
mailItems.add(mail); // Inserting the data on the ArrayList.
mailAdapter.notifyDataSetChanged(); // Notifying the adapter that my ArrayList was modified.
}
}
公共类MainActivity扩展了ActionBarActivity{
private int numMail=1;//使用虚拟int创建具有不同编号的项目。
private MailAdapter MailAdapter;//您的自定义适配器。
private ArrayList和我发现了一个类似的问题,您也可以阅读
编辑:另一个,这可能是一个有趣的阅读。我们可能需要您的适配器代码来给您一个答案。完成。谢谢您的时间,非常感谢MaukerNo问题。我已经更新了答案。看看这是否是问题所在。还有一个问题……您是否试图在此列表视图上显示图像和文本?我是,但我有我没有对图像做任何处理只是Yet注释不是用于扩展讨论的;这段对话是。好的。很抱歉。我下次会记得的。谢谢你的建议。非常棒的Mauker。Superstar。Thx坚持这一点。脱节之处在于我正在创建一个新的arraylist,我将所有代码整合到OnCreate中我们将进一步了解为什么全局arraylist将其固定为AFAICS。我的arraylist在它所在的位置很好。再次,感谢所有的时间和努力。
public class MainActivity extends ActionBarActivity {
private int numMail = 1; // Dummy int to create my items with different numbers.
private MailAdapter mailAdapter; // Your custom adapter.
private ArrayList<ArrayList<String>> mailItems; // This is going to be your data structure, everytime you change it, call the notifyDataSetChanged() method.
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button bt = (Button) findViewById(R.id.button);
ListView lv_mail = (ListView) findViewById(R.id.listView);
mailItems = new ArrayList<>();
mailAdapter = new MailAdapter(this,mailItems);
lv_mail.setAdapter(mailAdapter);
bt.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
addItem(); // The method I'm using to insert the item. Look for it below.
}
});
}
// Here I'm creating a new ArrayList, and appending it to my 'mailItems' Array. After that, I'm notifying the adapter that my data changed.
private void addItem() {
ArrayList<String> mail = new ArrayList<>();
mail.add(0,"mail " + numMail++);
mail.add(1,"path_to_image"); // Depending on what you want to do, put your path, URI, or whatever other way you want to store that image data.
mailItems.add(mail); // Inserting the data on the ArrayList.
mailAdapter.notifyDataSetChanged(); // Notifying the adapter that my ArrayList was modified.
}
}