activity_main.xml
<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">
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/etCountry"
android:hint="Country"
android:layout_below="@+id/textView"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/etPopulation"
android:inputType="number"
android:hint="Population"
android:layout_below="@+id/etCountry"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Add"
android:id="@+id/btn"
android:layout_below="@+id/etPopulation"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<TextView android:text="@string/hello_world" android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/textView" />
<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/lv"
android:layout_below="@+id/textView"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="119dp" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Clear"
android:id="@+id/btn1"
android:layout_below="@+id/etPopulation"
android:layout_alignRight="@+id/lv"
android:layout_alignEnd="@+id/lv"
android:layout_marginRight="56dp"
android:layout_marginEnd="56dp" />
</RelativeLayout>
customitem.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="asddff"
android:textSize="24sp"
android:padding="16dp"
android:id="@+id/tv" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="population"
android:textColor="#ff9857ff"
android:textSize="24sp"
android:padding="16dp"
android:id="@+id/tv1" />
</LinearLayout>
MainActivity.java
package com.example.user.listview;
import android.content.Intent;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.AdapterView;
import android.widget.Button;
import android.view.View;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends ActionBarActivity implements View.OnClickListener{
EditText etCountry;
EditText etPopulation;
CountryAdapter adapter;
Button btn;
Button btn1;
ListView lv;
List<Country> countryInfo;
Country country;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
}
private void init() {
countryInfo = new ArrayList<Country>();
etCountry = (EditText) findViewById(R.id.etCountry);
etPopulation = (EditText) findViewById(R.id.etPopulation);
btn = (Button) findViewById(R.id.btn);
btn1 = (Button) findViewById(R.id.btn1);
btn.setOnClickListener(this);
btn1.setOnClickListener(this);
lv = (ListView) findViewById(R.id.lv);
//lv.setOnItemClickListener(this);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onClick(View v) {
if(v.getId()==R.id.btn) {
country = new Country();
country.setCountry(etCountry.getText().toString());
country.setPolulation(etPopulation.getText().toString());
countryInfo.add(country);
adapter = new CountryAdapter(this, countryInfo);
lv.setAdapter(adapter);
adapter.notifyDataSetChanged();
etCountry.setText("");
etPopulation.setText("");
}
if(v.getId()==R.id.btn1)
{
adapter.clear();
}
}
}
CountryAdapter.java
package com.example.user.listview;
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 java.util.List;
/**
* Created by PC21 on 24/1/2015.
*/
public class CountryAdapter extends ArrayAdapter<Country> {
LayoutInflater inflater;
ViewHolder holder;
public CountryAdapter(Context context, List<Country> objects) {
super(context, 0, objects);
inflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if(convertView == null) // getting from catch
{
convertView = inflater.inflate(R.layout.customitem,null);
holder = new ViewHolder();
holder.tv = (TextView) convertView.findViewById(R.id.tv);
holder.tv1 = (TextView) convertView.findViewById(R.id.tv1);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
Country c1 = getItem(position);
holder.tv.setText(c1.getCountry());
holder.tv1.setText(c1.getPolulation());
return convertView;
}
static class ViewHolder{
public TextView tv;
public TextView tv1;
}
}
Country.java
package com.example.user.listview;
/**
* Created by PC21 on 24/1/2015.
*/
public class Country {
private String country;
private String polulation;
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country = country;
}
public String getPolulation() {
return polulation;
}
public void setPolulation(String polulation) {
this.polulation = polulation;
}
}
Output:
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