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我有一個帶有3個文本視圖的列表視圖，並且我想從這些文本視圖中點擊的項目中檢索特定數據。現在我試圖從第一個textview中獲取數據。問題是，如果我點擊項目1，2，3或其他，並不重要，因爲我總是會從列表視圖中的第一個項目獲取文本。我認爲這個問題是因爲我不知道如何明確哪些數據是我想要的，從哪個項目。這是我的代碼： estoque.java：使用自定義適配器在列表視圖中從文本視圖中獲取文本
package com.example.asus.mingausfashionmoda;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import com.parse.FindCallback;
import com.parse.ParseException;
import com.parse.ParseObject;
import com.parse.ParseQuery;
public class estoque extends ListActivity {
String qntES;
String pcES;
String pvES;
//list
protected List<ParseObject> mObject;
String variable = "camisa";
// declare class variables
private ArrayList<Item> m_parts = new ArrayList<Item>();
private Runnable viewParts;
private ItemAdapter m_adapter;
/** Called when the activity is first created. */
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.estoque_main);
// instantiate our ItemAdapter class
m_adapter = new ItemAdapter(this, R.layout.list_item, m_parts);
setListAdapter(m_adapter);
// here we are defining our runnable thread.
viewParts = new Runnable(){
public void run(){
handler.sendEmptyMessage(0);
}
};
// here we call the thread we just defined - it is sent to the handler below.
Thread thread = new Thread(null, viewParts, "MagentoBackground");
thread.start();
}
private Handler handler = new Handler()
{
public void handleMessage(Message msg)
{
// create some objects
// here is where you could also request data from a server
// and then create objects from that data.
ParseQuery<ParseObject> query = new ParseQuery<ParseObject>(variable);
query.findInBackground(new FindCallback<ParseObject>() {
@Override
public void done(List<ParseObject> statuslist, ParseException e) {
if(e != null){
//data successfully retrieved
Toast.makeText(estoque.this, "Houve um erro inesperado, tente novamente mais tarde", Toast.LENGTH_LONG).show();
}else{
//something went wrong
mObject = statuslist;
for(int i = 0; i<mObject.size(); i++) {
ParseObject statusObject = mObject.get(i);
String username = statusObject.getString("user");
Number qntE = statusObject.getNumber("qnt");
qntES = String.valueOf(qntE);
Number pcE = statusObject.getNumber("precoC");
pcES = String.valueOf(pcE);
Number pvE = statusObject.getNumber("precoV");
pvES = String.valueOf(pvE);
m_parts.add(new Item(qntES, pvES, pcES));
m_adapter = new ItemAdapter(estoque.this, R.layout.list_item, m_parts);
setListAdapter(m_adapter);
}
}
}
});
final ListView lv = (ListView) findViewById(android.R.id.list);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> myAdapter, View myView, int myItemInt, long mylng) {
TextView ttd = (TextView)findViewById(R.id.toptextdata);
System.out.println(ttd.getText().toString());
}
});
}
};
}
ItemAdapter.java：
package com.example.asus.mingausfashionmoda;
/**
* Created by ASUS on 21/12/2015.
*/
import java.util.ArrayList;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;
import android.widget.Toast;
public class ItemAdapter extends ArrayAdapter<Item> {
// declaring our ArrayList of items
private ArrayList<Item> objects;
/* here we must override the constructor for ArrayAdapter
* the only variable we care about now is ArrayList<Item> objects,
* because it is the list of objects we want to display.
*/
public ItemAdapter(Context context, int textViewResourceId, ArrayList<Item> objects) {
super(context, textViewResourceId, objects);
this.objects = objects;
}
/*
* we are overriding the getView method here - this is what defines how each
* list item will look.
*/
public View getView(int position, View convertView, ViewGroup parent){
// assign the view we are converting to a local variable
View v = convertView;
/** v.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
System.out.println("CARALHO VC CRICOU" + objects);
}
}); */
// first check to see if the view is null. if so, we have to inflate it.
// to inflate it basically means to render, or show, the view.
if (v == null) {
LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = inflater.inflate(R.layout.list_item, null);
}
/*
* Recall that the variable position is sent in as an argument to this method.
* The variable simply refers to the position of the current object in the list. (The ArrayAdapter
* iterates through the list we sent it)
*
* Therefore, i refers to the current Item object.
*/
Item i = objects.get(position);
if (i != null) {
// This is how you obtain a reference to the TextViews.
// These TextViews are created in the XML files we defined.
TextView tt = (TextView) v.findViewById(R.id.toptext);
TextView ttd = (TextView) v.findViewById(R.id.toptextdata);
TextView mt = (TextView) v.findViewById(R.id.middletext);
TextView mtd = (TextView) v.findViewById(R.id.middletextdata);
TextView bt = (TextView) v.findViewById(R.id.bottomtext);
TextView btd = (TextView) v.findViewById(R.id.desctext);
// check to see if each individual textview is null.
// if not, assign some text!
if (tt != null){
tt.setText("Quantidade: ");
}
if (ttd != null){
ttd.setText(i.getName());
}
if (mt != null){
mt.setText("Preco compra: ");
}
if (mtd != null){
mtd.setText("$" + i.getPrice());
}
if (bt != null){
bt.setText("Preco venda: ");
}
if (btd != null){
btd.setText(i.getDetails());
}
}
// the view must be returned to our activity
return v;
}
}
Item.java：
package com.example.asus.mingausfashionmoda;
import android.widget.TextView;
public class Item {
private String details;
private String name;
private String price;
public Item(){
}
public Item(String i, String d, String p){
this.details = d;
this.name = i;
this.price = p;
}
public String getDetails() {
return details;
}
public void setDetails(String details) {
this.details = details;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPrice() {
return price;
}
public void setPrice(String price) {
this.price = price;
}
}
estoque_main.xml：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/btnSelecionarQuery"
android:text="ROUPA"
/>
<ListView
android:id="@+id/android:list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:clickable="true"
/>
<TextView
android:id="@+id/android:empty"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="No items to display."/>
</LinearLayout>
list_item.xml：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="?android:attr/listPreferredItemHeight"
android:padding="6dip">
<!-- Item Name -->
<TextView
android:id="@+id/toptext"
android:layout_width="wrap_content"
android:layout_height="26dip"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:textStyle="bold"
android:singleLine="true"
android:ellipsize="marquee"
/>
<!-- Actual Item Name Data -->
<TextView
android:id="@+id/toptextdata"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_toRightOf="@id/toptext"
android:singleLine="true"
android:ellipsize="marquee"
/>
<!-- Price Tag -->
<TextView
android:id="@+id/middletext"
android:layout_width="wrap_content"
android:layout_height="26dip"
android:layout_alignParentLeft="true"
android:layout_below="@id/toptext"
android:textStyle="bold"
android:gravity="center_vertical"
/>
<!-- Actual Price Data -->
<TextView
android:id="@+id/middletextdata"
android:layout_width="fill_parent"
android:layout_height="26dip"
android:layout_alignParentRight="true"
android:layout_below="@id/toptext"
android:layout_toRightOf="@id/middletext"
android:gravity="center_vertical"
/>
<!-- Description Tag -->
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_below="@id/middletext"
android:textStyle="bold"
android:id="@+id/bottomtext"
android:singleLine="false"
/>
<!-- This is the actual description -->
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentBottom="true"
android:layout_below="@id/bottomtext"
android:id="@+id/desctext"
android:singleLine="false"
/>
</RelativeLayout>
爲了方便您的理解，這就是我從列表視圖中單擊項目，並設法得到它的第一個TextView的文本（這是estoque.java）：
final ListView lv = (ListView) findViewById(android.R.id.list);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> myAdapter, View myView, int myItemInt, long mylng) {
TextView ttd = (TextView)findViewById(R.id.toptextdata);
System.out.println(ttd.getText().toString());
}
});
感謝。
嗯，那很快......謝謝，它現在可行！ ：D –
請留下評論爲什麼降票。以改善答案。謝謝 –
哦，我現在不能接受它，我不知道爲什麼......以後會這樣做：D –