LEARN ANDROID: ListView

In this Code We will use multiple Views in a single list as well as put a Button below the list which use to show how many items will be selected in another new Activities.

Download Android Multiple Views in Single List Demo Example Code

First We will create the layout of each row as follows layout/rowlayout.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">
	
	<ImageView android:layout_height="60px" 
		android:id="@+id/imageView1"
		android:layout_width="60px" 
		android:src="@drawable/icon" 
		android:maxWidth="5px"
		android:minWidth="5px"
		/>
	<TextView android:text="TextView" 
		android:layout_width="200dp"
		android:layout_height="wrap_content" 
		android:id="@+id/textView1"
		android:lines="2"
		android:layout_marginLeft="10px"
		android:layout_marginTop="10px" 
		android:textSize="15px"
		></TextView>
	<CheckBox android:text="" 
	android:id="@+id/checkBox1" 
	android:layout_width="wrap_content" 
	android:layout_height="wrap_content" />
	
</LinearLayout>

Than we create our main layout as follows layout/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"
    >
<ListView 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:id="@android:id/list"
    />
  <Button android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:id="@+id/btnOrder" 
    android:text="Order" 
    android:layout_gravity="center"/>
</LinearLayout>

Here the name of the listView must be as aboves : "@android:id/list" where android list will be automatically placed when we add the adapter in our activity class.

Then we create a class which extend the ArrayAdapter class as follows.

 
package com.container;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;

import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.ImageView;
import android.widget.TextView;

import com.container.R;

public class HotelMenuAdapter extends ArrayAdapter<String> {
	Context context;
	String[] values;
	int position;
	boolean itemSelected[] = { false, false, false, false, false, false };

	public HotelMenuAdapter(Context context, String[] values) {
		super(context, R.layout.rowlayout, values);
		this.context = context;
		this.values = values;
	}

	public View getView(final int positon, View convertView, ViewGroup parent) {
		LayoutInflater inflater = (LayoutInflater) context
				.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
		View rowView = inflater.inflate(R.layout.rowlayout, parent, false);

		TextView textView = (TextView) rowView.findViewById(R.id.textView1);
		ImageView image = (ImageView) rowView.findViewById(R.id.imageView1);
		final CheckBox checkBox = (CheckBox) rowView
				.findViewById(R.id.checkBox1);

		image.setOnClickListener(new View.OnClickListener() {

			public void onClick(View v) {
				// TODO Auto-generated method stub
				// Toast.makeText(context, ((TextView)v).getText().toString(),
				// 5).show();
				if (checkBox.isChecked()) {
					checkBox.setChecked(false);
					itemSelected[positon] = false;
				} else {
					checkBox.setChecked(true);
					itemSelected[positon] = true;
				}
			}
		});

		textView.setOnClickListener(new View.OnClickListener() {

			public void onClick(View v) {
				// TODO Auto-generated method stub
				// Toast.makeText(context, ((TextView)v).getText().toString(),
				// 5).show();
				if (checkBox.isChecked()) {
					checkBox.setChecked(false);
					itemSelected[positon] = false;
				} else {
					checkBox.setChecked(true);
					itemSelected[positon] = true;
				}
			}
		});

		checkBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {

			public void onCheckedChanged(CompoundButton buttonView,
					boolean isChecked) {
				// TODO Auto-generated method stub
				// Toast.makeText(context, String.valueOf(positon), 5).show();
				if (isChecked) {
					itemSelected[positon] = true;
					// Toast.makeText(context, "Checked", 5).show();
				} else {

					itemSelected[positon] = false;
					// Toast.makeText(context, "Not Checked", 5).show();
				}

			}
		});

		textView.setText(values[positon]);
		switch (positon) {
		case 0:
			image.setImageResource(R.drawable.a);
			break;
		case 1:
			image.setImageResource(R.drawable.b);
			break;
		case 2:
			image.setImageResource(R.drawable.c);
			break;
		case 3:
			image.setImageResource(R.drawable.d);
			break;
		case 4:
			image.setImageResource(R.drawable.e);
			break;
		case 5:
			image.setImageResource(R.drawable.f);
			break;
		case 6:
			image.setImageResource(R.drawable.g);
			break;

		}

		checkBox.setChecked(false);
		return rowView;
	}

	public boolean[] getItemSelected() {
		return itemSelected;
	}

	public void setItemSelected(boolean[] itemSelected) {
		this.itemSelected = itemSelected;
	}

}

In this class we also add the listeners for the ImageView, TextView as well as CheckBoxes.

Then in our main Activity class we will extends the ListActivity class as follows.

package com.container;

import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.Toast;

public class HotelMenuDemoActivity extends ListActivity {
	/** Called when the activity is first created. */
	String[] values = { "McVeggie~Rs.40-50", "McAloo Tikki~Rs 20–50",
			"Paneer Salsa~Rs 20–50", "Crispy Chinese~Rs 20–50",
			"McCurry Pan~Rs 20–50", "Chicken Maharaja Mac", };
	Button btnOrder;
	CheckBox chBox;
	HotelMenuAdapter menuAdapter;

	
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		
		menuAdapter = new HotelMenuAdapter(getApplicationContext(), values);
		setListAdapter(menuAdapter);

		btnOrder = (Button) findViewById(R.id.btnOrder);
		btnOrder.setOnClickListener(new View.OnClickListener() {

			public void onClick(View arg0) {
				// TODO Auto-generated method stub
				boolean [] selectedItem=menuAdapter.getItemSelected();
				int count=0;
				Intent intent=new Intent(getApplicationContext(),ShowOrderActivity.class);
				for(int i=0;i<selectedItem.length;i++){
					if(selectedItem[i]==true){
						count++;
						intent.putExtra("items",values);
						intent.putExtra("selected",selectedItem);
				//	Toast.makeText(getApplicationContext(), menuAdapter.getItem(i),5).show();
					}
				}
				startActivity(intent);
			}
		});

	}
}

Finally We will create the another activity which just show the items witch is selected. as follows.

package com.container;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class ShowOrderActivity extends Activity {

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		TextView tv = new TextView(this);
		tv.setMaxLines(10);
		Bundle b = getIntent().getExtras();
		String order = "Your Order is : \n";
		String[] values = (String[]) b.getSerializable("items");
		boolean[] items = (boolean[]) b.getSerializable("selected");
		if (items != null && values != null) {
			for (int i = 0; i < values.length; i++) {
				if (items[i] == true)
					order += values[i] + ",\n";
			}
		}
		tv.setText(order);
		setContentView(tv);
		// TODO Auto-generated method stub
	}

}

That's the code:

When you click on the ImageView,TextView or Checkbox corresponding Checkbox will be checked or unchecked in reverse state. as follows
After selecting which ever items you want click on "Order" Button than following output will be displayed.

ListView :

A view that shows items in a vertically scrolling list. The items come from the ListAdapter associated with this view.
Contains a vertically scrolling, horizontally filled list of View objects, each of which typically contains a row of data; the user can choose an item to perform some action upon.
In ListView we have set adapter of ArrayAdapter which gathers data from an Array is generally used when there is only a single column data or when the data comes from a resource array.
Download Android ListView :Example Code

Let's see an Example of List View Simply have only one item in each line.as follows.

First We will create a layout file main.xml as follows:

<?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">
 <TextView android:text="Select Color"
  android:id="@+id/textView1"
  android:textAppearance="?android:attr/textAppearanceLarge"
  android:layout_width="wrap_content" 
  android:layout_height="wrap_content" />
 <ListView android:layout_width="fill_parent"
  android:layout_height="wrap_content"
   android:id="@+id/listView01" />

</LinearLayout>

Than we will Create a java File as follows :

package com.contnr;

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.TextView;
import android.widget.Toast;

public class ListViewContainerActivity extends Activity {
    /** Called when the activity is first created. */
    ListView lv;
    TextView tv;
 @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        String [] colors= {"Red","Green","Blue","Pink","Gray"};
        lv=(ListView)findViewById(R.id.listView01);
        tv=(TextView)findViewById(R.id.textView1);
        ArrayAdapter<String> adapter=new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_list_item_1, colors);
        lv.setAdapter(adapter);
        
        lv.setOnItemClickListener(new OnItemClickListener() {

   public void onItemClick(AdapterView<?> myAdapter, View view, int myItemId,
     long myLang) {
    // TODO Auto-generated method stub
    
    String selectedItem=lv.getItemAtPosition(myItemId).toString();
    tv.setText("You Selected: "+ selectedItem);
    Toast.makeText(getApplicationContext(), selectedItem, 2).show();
   }
  });
    }
}

When you click on any of the List Item that displayed in Toast and in TextView also as follows....

LEARN ANDROID

Monday, 10 September 2012

Multiple Views in Sinlge List with ListView and Other Control - Hotel Menu Example

Wednesday, 29 August 2012

Android ListView Tutorial with Example

ListView :

Download Android ListView :Example Code