Android如何使用复选框识别列表视图中的项目 [英] Android how to identify item in listview with checkbox
问题描述
我真的被困在这里了.我想要的并不简单(对我来说),但是我已经为 android 编程一年了.我想要的是一个列表视图,每行中有一个图像视图、一个文本视图、一个复选框和另一个文本视图.让我们首先在布局中有一个文本视图和一个复选框.基于 this 教程,我设法做到了(有很多,但这对我来说似乎是最好的).我有一个填充了文本视图和复选框的列表视图.
I am really stuck here. What I want is not simple (for me), however I've been programming android a year now. What I want is a listview with an imageview, a textview, a checkbox, and another textview in each row. Let's have a textview and a checkbox first in the layout. Based on this tutorial I managed to do that (there are a lot, but this seems to be the best for me). I have a listview populated with textviews and checkboxes.
结果如下:
这就是我如何获得我点击的 textview 的文本:
This is how I get the text of textview I click on:
textView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
TextView tv = (TextView) v ;
String text_of_clicked_textview = tv.getText().toString();
Log.i("TAG", "" + text_of_clicked_textview);
}
});
所以当我点击 Mercury 时,我在 text_of_clicked_textview 变量中得到 Mercury.
So When I click on Mercury, I get Mercury in the text_of_clicked_textview variable.
但是我如何检查我点击了哪个复选框?例如,我单击第三个复选框,我希望它现在位于地球行中.如果我同时了解列表视图行中的 textview 文本(Earth)和项目编号(3),那就最好不过了.
But how can i check which checkbox I clicked on? E.g I click on the 3rd checkbox, I want to now it is in the row of Earth. Best would be if I get to know both the text of textview in the row of the listview(Earth) and and number of the item (3).
我想我必须在复选框上设置一个 onClickListener 但接下来呢?
I guess I have to set an onClickListener on the checkbox but what next?
checkBox.setOnClickListener( new View.OnClickListener() {
public void onClick(View v) {
CheckBox cb = (CheckBox) v ;
}
});
推荐答案
This is XML for Custom Row in ListView :
This is XML for Custom Row in ListView :
<?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">
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/camera_icon" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Large Text"
android:textAppearance="?android:attr/textAppearanceLarge" />
<CheckBox
android:id="@+id/checkBox1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
/>
</LinearLayout>
这是实施列表的完整活动:只需复制此活动进行测试,然后理解代码即可.在主活动中放置一个列表视图
This is Complete Activity in which List is implemented : Just Copy this Activity for test then understand code. Place one listview in main Activity
package com.DemoTest;
import java.util.ArrayList;
import java.util.List;
import java.util.zip.Inflater;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
public class CustomList extends Activity implements OnClickListener
{
ListView listView;
ArrayList<EachRow> list=new ArrayList<CustomList.EachRow>();
EachRow each;
@Override
protected void onCreate(Bundle savedInstanceState)
{
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
String[] color={"red","green","blue","white","yellow","cyan","purple","grey",
"0red","0green","0blue","0white","0yellow","0cyan","0purple","0grey",
"1red","1green","1blue","1white","1yellow","1cyan","1purple","1grey"};
for(String str : color)
{
each=new EachRow();
each.text=str;
list.add(each);
}
listView=(ListView)findViewById(R.id.listView1);
listView.setAdapter(new MyAdapter(this, 0, list));
//listView.setOnItemClickListener(this);
}
class MyAdapter extends ArrayAdapter<EachRow>
{
LayoutInflater inflat;
ViewHolder holder;
public MyAdapter(Context context, int textViewResourceId,
ArrayList<EachRow> objects)
{
super(context, textViewResourceId, objects);
// TODO Auto-generated constructor stub
inflat=LayoutInflater.from(context);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
if(convertView==null)
{
convertView=inflat.inflate(R.layout.row_checkox, null);
holder=new ViewHolder();
holder.textView=(TextView)convertView.findViewById(R.id.textView1);
holder.image=(ImageView)convertView.findViewById(R.id.imageView1);
holder.check=(CheckBox)convertView.findViewById(R.id.checkBox1);
holder.check.setOnClickListener(CustomList.this);
convertView.setTag(holder);
}
holder=(ViewHolder) convertView.getTag();
EachRow row= getItem(position);
Log.d("size", row.text);
holder.textView.setText(row.text);
holder.check.setChecked(row.checkBool);
holder.check.setTag(position);
return convertView;
}
@Override
public EachRow getItem(int position) {
// TODO Auto-generated method stub
return list.get(position);
}
private class ViewHolder
{
TextView textView;
ImageView image;
CheckBox check;
}
}
private class EachRow
{
String text;
boolean checkBool;
}
@Override
public void onClick(View v)
{
// TODO Auto-generated method stub
EachRow row=list.get((Integer)v.getTag());
row.checkBool=!row.checkBool;
Log.d("item", "Item Click at "+(Integer)v.getTag()+" : "+row.text+" is "+row.checkBool);
}
}
这篇关于Android如何使用复选框识别列表视图中的项目的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!