How to call a contact from a contact list in Android Studio?
This code allows me to get a list of contacts from a custom phone and display them. I'm working on some changes, I've added a Call button with each individual contact, but I'm having a hard time figuring out how to get just the phone number. Once I get the phone number, I'll just do this to call the number:
Intent callIntent = new Intent(Intent.ACTION_CALL);
callIntent.setData(Uri.parse("0377778888"));
How can I find out which number to call? How do I know that the user's x has the number y and then pass that number to the intent?
Here is the code:
Contacts.java
package edu.utep.cs.cs4330.easytech;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.ContentResolver;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.provider.ContactsContract;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
import java.util.ArrayList;
public class Contacts extends Activity {
private ListView mListView;
private ProgressDialog pDialog;
private Handler updateBarHandler;
ArrayList<String> contactList;
Cursor cursor;
int counter;
Button callContact;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.contacts_list_view);
pDialog = new ProgressDialog(this);
pDialog.setMessage("Reading contacts...");
pDialog.setCancelable(false);
pDialog.show();
mListView = (ListView) findViewById(R.id.list);
updateBarHandler = new Handler();
callContact = (Button) findViewById(R.id.callContact);
// Since reading contacts takes more time, let run it on a separate thread.
new Thread(new Runnable() {
@Override
public void run() {
getContacts();
}
}).start();
// Set onclicklistener to the list item.
mListView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
//TODO Do whatever you want with the list data
Toast.makeText(getApplicationContext(), "Item clicked : \n" + contactList.get(position), Toast.LENGTH_SHORT).show();
}
});
}
public void getContacts() {
contactList = new ArrayList<String>();
String phoneNumber = null;
String email = null;
Uri CONTENT_URI = ContactsContract.Contacts.CONTENT_URI;
String _ID = ContactsContract.Contacts._ID;
String DISPLAY_NAME = ContactsContract.Contacts.DISPLAY_NAME;
String HAS_PHONE_NUMBER = ContactsContract.Contacts.HAS_PHONE_NUMBER;
Uri PhoneCONTENT_URI = ContactsContract.CommonDataKinds.Phone.CONTENT_URI;
String Phone_CONTACT_ID = ContactsContract.CommonDataKinds.Phone.CONTACT_ID;
String NUMBER = ContactsContract.CommonDataKinds.Phone.NUMBER;
Uri EmailCONTENT_URI = ContactsContract.CommonDataKinds.Email.CONTENT_URI;
String EmailCONTACT_ID = ContactsContract.CommonDataKinds.Email.CONTACT_ID;
String DATA = ContactsContract.CommonDataKinds.Email.DATA;
StringBuffer output;
ContentResolver contentResolver = getContentResolver();
cursor = contentResolver.query(CONTENT_URI, null, null, null, null);
// Iterate every contact in the phone
if (cursor.getCount() > 0) {
counter = 0;
while (cursor.moveToNext()) {
output = new StringBuffer();
// Update the progress message
updateBarHandler.post(new Runnable() {
public void run() {
pDialog.setMessage("Reading contacts : " + counter++ + "/" + cursor.getCount());
}
});
String contact_id = cursor.getString(cursor.getColumnIndex(_ID));
String name = cursor.getString(cursor.getColumnIndex(DISPLAY_NAME));
int hasPhoneNumber = Integer.parseInt(cursor.getString(cursor.getColumnIndex(HAS_PHONE_NUMBER)));
if (hasPhoneNumber > 0) {
output.append("\nName: " + name);
//This is to read multiple phone numbers associated with the same contact
Cursor phoneCursor = contentResolver.query(PhoneCONTENT_URI, null, Phone_CONTACT_ID + " = ?", new String[]{contact_id}, null);
while (phoneCursor.moveToNext()) {
phoneNumber = phoneCursor.getString(phoneCursor.getColumnIndex(NUMBER));
output.append("\n" + phoneNumber);
}
phoneCursor.close();
// Read every email id associated with the contact
Cursor emailCursor = contentResolver.query(EmailCONTENT_URI, null, EmailCONTACT_ID + " = ?", new String[]{contact_id}, null);
while (emailCursor.moveToNext()) {
email = emailCursor.getString(emailCursor.getColumnIndex(DATA));
output.append("\n Email:" + email);
}
emailCursor.close();
}
// Add the contact to the ArrayList
contactList.add(output.toString());
}
// ListView has to be updated using a ui thread
runOnUiThread(new Runnable() {
@Override
public void run() {
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getApplicationContext(), R.layout.list_item, R.id.text1, contactList);
mListView.setAdapter(adapter);
}
});
// Dismiss the progressbar after 500 millisecondds
updateBarHandler.postDelayed(new Runnable() {
@Override
public void run() {
pDialog.cancel();
}
}, 500);
}
}
}
contacts_list_view.xml
To display the list of contacts
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="edu.utep.cs.cs4330.easytech.Home">
<ImageView
android:layout_width="0dp"
android:layout_height="0dp"
android:scaleType="centerCrop"
android:src="@drawable/back4"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:layout_constraintBottom_creator="1"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1"
tools:layout_constraintTop_creator="1" />
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_margin="20dp">
<ListView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</RelativeLayout>
</android.support.constraint.ConstraintLayout>
list_item.xml
Each individual contact
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="5dp"
android:paddingTop="5dp">
<Button
android:id="@+id/callContact"
android:layout_width="125dp"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerInParent="true"
android:text="Call" />
<TextView
android:id="@+id/text1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toLeftOf="@+id/callContact"
android:layout_alignTop="@+id/callContact"
android:layout_alignParentLeft="true"
android:textSize="16sp"
android:textColor="@android:color/black" />
</RelativeLayout>
Any hints are appreciated, thanks.
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2 answers
So this is a way to "check" if the user has selected the desired contact: I added a dialog box, so when you click on a contact in the list, it asks if you are sure of this:
Note. SelectUser TmpUser is a class that is used to arrange contacts in a list, if you have a contact list you should use the object with name, phone number, etc. that you used to create the list.
// A dilaog that will open when a contact is clicked, verify that you want to delete the contact.
protected void areYouSureDialog(final SelectUser tmpUser) {
final String userPhoneNumber = tmpUser.getPhone();
new AlertDialog.Builder(this)
.setTitle("Call a Contact")
.setMessage("Are you sure you want to call:" + userPhoneNumber)
.setPositiveButton("Call", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
callUser(userPhoneNumber);
}
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// Do nothing.
}
})
.setIcon(android.R.drawable.ic_dialog_alert)
.show();
}
We now have a Call Contact function:
public void callUser(String phoneNum) {
Intent callIntent = new Intent(Intent.ACTION_CALL);
callIntent.setData(Uri.parse("tel:" + phoneNum + ""));
if (ActivityCompat.checkSelfPermission(CallActivity.this,
Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
return;
}
startActivity(callIntent);
}
And don't forget to add the permissin manifest:
<uses-permission android:name="android.permission.CALL_PHONE" />
Hope this answers your question.
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