Showing phone contact on listview

Showing phone contact on listview. Listview serves to accommodate the names of contact (phone book). Preview the end result of this exercise looks like Picture 1.

The following steps:

1. Create new project

Project Name : contactList
Package Name : com.concact.list
Activity Name : ContactListActivity
Target Device : Andorid 2.3

2. Add widgets ListView on activity_main.xml

activity_main.xml

<?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" android:orientation="vertical" > <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" /> <ListView android:id="@+id/list" android:layout_width="match_parent" android:layout_height="wrap_content" > </ListView></LinearLayout>

3. The core of is contactListActivity.java

ContactListActivity

import android.app.Activity;
import android.content.ContentResolver;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.Toast;

public class ContactListActivity extends Activity {
ListAdapter adapter;
String[] item, number;
ListView listView;
Cursor mCursor;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
listView = (ListView) findViewById(R.id.list);
}

@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
readContacts();
}

public void readContacts() {
ContentResolver cr = getContentResolver();
Cursor cur = cr.query(ContactsContract.Contacts.CONTENT_URI, null,
null, null, null);

if (cur.getCount() > 0) {
int i = 0;
int j = 0;
item = new String[cur.getCount()];
number = new String[cur.getCount()];
while (cur.moveToNext()) {
String id = cur.getString(cur
.getColumnIndex(ContactsContract.Contacts._ID));
String name = cur
.getString(cur
.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
if (Integer
.parseInt(cur.getString(cur
.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER))) > 0) {
System.out.println("name : " + name + ", ID : " + id);
item[i++] = name;
// get the phone number
Cursor pCur = cr.query(
ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
null,
ContactsContract.CommonDataKinds.Phone.CONTACT_ID
+ " = ?", new String[] { id }, null);

while (pCur.moveToNext()) {
String phone = pCur
.getString(pCur
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
System.out.println("phone" + phone);
number[j++] = phone;
}
pCur.close();

}
}
ArrayAdapter<String> g = new ArrayAdapter<String>(
getApplicationContext(),
android.R.layout.simple_dropdown_item_1line, item);
listView.setAdapter(g);
listView.setOnItemClickListener(new OnItemClickListener() {

@Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// TODO Auto-generated method stub
String v = number[arg2];
Toast.makeText(getApplicationContext(), v,
Toast.LENGTH_SHORT).show();
}
});
}
}

}

4. Add some user permissions in AndroidManifest.xml (line 8)

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.contact.list" android:versionCode="1" android:versionName="1.0" >
<uses-sdk android:minSdkVersion="8" /> <uses-permission android:name="android.permission.READ_CONTACTS"/> <application android:icon="@drawable/ic_launcher" android:label="@string/app_name" > <activity android:name=".ContactListActivity" android:label="@string/app_name" android:theme="@android:style/Theme.Light"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application></manifest>

Completed. Congratulations creative with android!