I am trying to create a ListView with CheckBox's...Th ListView should allow the user to both select an item or open that item to select other choice inside it. In other words, the ListView should be able to distinguish between the click on the checkbox and the click on the item itself.
I tried to implement it using android.R.layout.simple_list_item_multiple_choice but this one allows me to only check the checkbox even if I click outside the checkbox (on the item).
anyone can help?
Here's my code,
import java.util.ArrayList;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
public class ListViewActivity extends Activity implements OnItemClickListener {
ListView directoryList;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final ArrayList<String> contacts = new ArrayList<String>();
contacts.add("zaid");
contacts.add("hazem");
contacts.add("Oubai");
directoryList= (ListView) findViewById(R.id.directoryList);
final ArrayAdapter<String> arrayAdapter;
arrayAdapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_multiple_choice,
contacts);
directoryList.setAdapter(arrayAdapter);
directoryList.setOnItemClickListener(this);
directoryList.setClickable(true);
}
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
}
}
You need a customized array adapter. In your getView(), get a hold of your checkbox and set the OnCheckedChangeListener()
Here is a tutorial on how you can make your own custom adapter. The example has a clickable textbox but you can change it to work for a checkbox.
http://www.shubhayu.com/android/listview-with-arrayadapter-and-customized-items
Related
I wrote an exercise android app which consists of a text entry, an add button, and a dynamic list. Users are supposed to be able to type a string into the text entry, click on add button, and add it to the list. However, when I run this script on the emulator, nothing happens when I click on the add button. Checking the logcat doesn't help, because no logs appear when clicking on the button either. I also tried adding a breakpoint, but, again, nothing happens when I try to step over. Can someone help me on this please? I'd greatly appreciate it. Thanks.
package p.listviewexerice2;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity implements View.OnClickListener{
Button bt;
EditText et;
ListView lv;
ArrayAdapter<String> adapter;
ArrayList<String> list;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
bt = (Button) findViewById(R.id.button);
et = (EditText) findViewById(R.id.editText);
lv = (ListView) findViewById(R.id.listView);
list = new ArrayList<>();
list.add("x");
adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,list);
lv.setAdapter(adapter);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
Toast.makeText(getBaseContext(),list.get(position),Toast.LENGTH_SHORT).show();
}
});
}
#Override
public void onClick(View v){
if(v==bt){
String name = et.getText().toString();
if(name.isEmpty()){
Toast.makeText(getBaseContext(),"Empty entry",Toast.LENGTH_SHORT).show();
}
else{
list.add(name);
adapter.notifyDataSetChanged();
}
}
}
}
Can you delete lv.setOnItem.. code block and try again ?
Because you have already implements from onClickListener, so your button call the method onClick()
Instead of this:
list.add(name);
Do this:
adapter.add(name);
Explanation: you create the adapter with parameter list, allright. But since then adapter manages it's own internal list. Adapter also has built-in methods "add()" and "remove()", to manage that internal list.
Your code is almost fine, just 1 thing is missing. You have not registered the click event for your button bt. And without registering the click event the system will not be able to execute the code for onClick(View v).
so just add the below code in your onCreate()
bt.setOnClickListener(this);
Using android studio and I have a large product list for a grocery store and want to be able to select items from that list. I then want the selected items to appear in another listview such as a users shopping cart.
#Updated
I have now created a checkable list view. How can I take the checked boxes and add them to another activity/listview that I have created.
enter code here import android.os.Bundle;
import java.util.ArrayList;
import android.app.Activity;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ListView;
import android.view.View;
public class MainActivity extends AppCompatActivity{
ArrayList<String> selectedItems=new ArrayList<>();
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ListView chl=(ListView)findViewById(R.id.checkable_list);
chl.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
String[] items={"Bacon","Sports Drinks","Detergent","Towels","Frozen
Pizza","Water"};
ArrayAdapter<String> adapter=new ArrayAdapter<String>
(this,R.layout.rowlayout,R.id.txt_title,items);
chl.setAdapter(adapter);
chl.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String selectedItem=((TextView)view).getText().toString();
if (selectedItem.contains(selectedItem)) {
selectedItems.remove(selectedItem);
}
else
selectedItems.add(selectedItem);
}
});
}
public void showSelectedItems(View view){
String items="";
for (String item:selectedItems){
items+="-"+item+"\n";
}
Toast.makeText(getApplicationContext(),"Added To Your Cart",Toast.LENGTH_SHORT).show();}}
Please give me MORE information for your Question.
First of all
You have to make a custom listview that call mOneListView and set method OnItemClickListener to mOneListView's ListViewAdapter.
and make another mTwoListView be called by mOneListView's Item.
I think your problem is do not know how to make a custom listview and make a listener for Item of List.
CHECK IT OUT.
I am trying to understand where to save the selected list view items from this code. With a dialog box you have an "ok/cancel" button option, is this possible with lists? Ideally I will be storing data from four different lists into a database on submit. In the below picture I would like to save the first three items into a database, or even an array just to start.
package com.example.lifebyfourlists;
import android.app.ListActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
public class MainActivity extends ListActivity{
String [] seven = {
"Dark Leafy Greens" ,
"Nuts",
"Carrots",
"Green Tea",
"Whole Grains",
"Fruits"};
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
ListView lstView = getListView();
lstView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
lstView.setTextFilterEnabled(true);
setListAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_checked, seven));
}
public void onListItemClick(ListView parent, View v, int position, long id){
Toast.makeText(this, "You have selected " + seven[position], Toast.LENGTH_SHORT).show();
}
}
I am trying to understand where to save the selected list view items from this code. With a dialog box you have an "ok/cancel" button option, is this possible with lists?
You can use getCheckedItemIds() or you can write a custom Adapter to track the selected rows.
I'm using the ListActivity class in conjunction with the simple_list_item_checked-layout which implements simple list items with checkboxes. Everything is working fine - clicking added items calls onListItemClick() and I can check/uncheck respective checkboxes of entries via the 'View v' parameter.
However what I wasn't able to figure out yet is, how to (pre)select checkboxes without any userinteraction?
Minimal so far working code snippet showing my intend:
package org.test;
import android.app.ListActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.CheckedTextView;
import android.widget.ListView;
public class TestActivity extends ListActivity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ArrayAdapter<String> list_elems = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_checked);
list_elems.add("foobar");
//TODO: check added entry labeled "foobar"
setListAdapter(list_elems);
}
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
CheckedTextView check = (CheckedTextView)v;
check.setChecked(!check.isChecked());
}
}
Thanks a lot in advance!
daten
This works for me:
You have to set the choicemode of the underlying ListView to single or multiple.
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ArrayAdapter<String> list_elems = new ArrayAdapter<String>(this, Android.R.layout.simple_list_item_checked);
list_elems.add("foobar");
//TODO: check added entry labeled "foobar"
setListAdapter(list_elems);
ListView lv = getListView();
lv.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
lv.setItemChecked(0, true);
}
Use a SimpleListAdapter as the ListAdapter for your ListActivity. Use two columns (one for your string and the other for the checked value), and the system should take care of it by itself. Here is a good example
I want to make a dynamic list view which gets the user credentials when I login for the first time and displays it in a list the next time I start the app. I know how to send the username from one intent to another. i haven't focused on the SQLite part yet, will do that later. I'm facing problems in creating the dynamic list view.
Found one very useful thread - Dynamically add elements to a listView Android
he used a button on the screen and called the method onClick to populate the list. Can i do it without the button? I want it to automatically happen once i am able to login.
how can i use the statements in my code?
listItems.add(value);
adapter.notifyDataSetChanged();
here value is the username i am getting from some other intent.
please help. thanks!
For this Just use the example given below:
For Instance you are Adding Some Strings into your List
So Create a ListArray like this
ArrayList<String> listItems = new ArrayList<String>();
now whenever you want to add certain string into list just do this thing
EditText editText = (EditText) findViewById(R.id.edit);
listItems.add("my string"); OR
listItems.add(editText.getText.toString()); //incase if you are getting string value from editText and adding it into the list
Use this Xml inside your linear layout in main.xml
<EditText android:id="#+id/edit"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
Now when you have added one item dynamically then call this
adapter.notifyDataSetChanged();
The above will update your list and display the upadted list.
For more info about this see the following links:
http://www.androidpeople.com/android-custom-listview-tutorial-part-1
http://www.androidpeople.com/android-custom-listview-tutorial-part-2
http://www.androidpeople.com/android-custom-dynamic-listview-%E2%80%93part3
In these tutorials you can replace String[] with ArrayList as given at the top of the answer ook and when you want to add any item just simply use the second code snippet.
Thanks
sHaH
The best way to do this will be to use ArrayAdapter. When modifying the adapter it automatically refresh itself so you don't have to call notifyDataSetChanged.
You can try out this code to add elements dynamically to list view.
You can do it with out button click also.
import java.util.ArrayList;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;
public class MainActivity extends Activity {
//step2 : create all the variables.
EditText et;
Button b;
ListView lv;
ArrayList<string> al;
ArrayAdapter<string> aa;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//step3 : intitalize all the variables.
et = (EditText) findViewById(R.id.editText1);
b = (Button) findViewById(R.id.button1);
lv = (ListView) findViewById(R.id.listView1);
al = new ArrayList<string>();//initialize array list
aa = new ArrayAdapter<string>(this,
android.R.layout.simple_list_item_1,
al);//step4 : establish communication bw arraylist and adapter
//step5 : establish communication bw adapter and dest (listview)
lv.setAdapter(aa);
lv.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView parent,
View v, int arg2,
long arg3) {
String item = al.get(arg2);
Toast.makeText(getApplicationContext(), item, 0).show();
}
});
//step6 : button click logic
b.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
//step i: take text from et and add to arraylist
String item = et.getText().toString();
al.add(0, item);
//step ii: notify to adapter
aa.notifyDataSetChanged();
//step iii: clr edit text
et.setText("");
}
});
}
}
For complete code check this list view example