Develop Reference

Passing data from one listview to another

I have been trying to pass the contact data from my second activity's list view to my main activity's list view, upon clicking the checkbox.But the data doesn't get transferred. How do I fix this?
MainActivity.java
package com.example.artist.sender;
import android.Manifest;
import android.app.AlertDialog;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Parcelable;
import android.provider.ContactsContract;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.telephony.SmsManager;
import android.text.Editable;
import android.text.TextUtils;
import android.util.SparseBooleanArray;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import org.w3c.dom.Text;
import java.util.ArrayList;
import java.util.List;
import static android.R.id.input;
import static android.app.AlertDialog.*;
public class MainActivity extends AppCompatActivity {
EditText itemText;
Button addButton;
Button sendText;
TextView text;
Button contact;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
itemText = (EditText) findViewById(R.id.editText);
addButton = (Button) findViewById(R.id.button1);
text=(TextView) findViewById(R.id.textView);
addButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (TextUtils.isEmpty(itemText.getText())||(itemText.getText().length()<10)||(itemText.getText().length()>10)) {
itemText.setError("The number is not valid.");
return;
} else {
text.setText(itemText.getText().toString());
itemText.setText("");
return;
}
}
});
Button delete;
delete = (Button) findViewById(R.id.btn2);
delete.setOnClickListener(new AdapterView.OnClickListener() {
#Override
public void onClick(View view) {
int con=text.getLineCount();
if(con==0)
Toast.makeText(MainActivity.this, "No number available to delete", Toast.LENGTH_SHORT).show();
else
text.setText("");
}
});
sendText=(Button) findViewById(R.id.btn3);
sendText.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
String phoneno = text.getText().toString();
int count = text.getLineCount();
SmsManager smsMgrVar = SmsManager.getDefault();
if (count == 0) {
Toast.makeText(MainActivity.this, "No number available", Toast.LENGTH_SHORT).show();
}
else
if (ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.SEND_SMS) == PackageManager.PERMISSION_GRANTED)
{
try{
smsMgrVar.sendTextMessage(phoneno, null, "Hey There!", null, null);
Toast.makeText(MainActivity.this, "Message Sent",Toast.LENGTH_LONG).show();
}
catch (Exception ErrVar)
{
Toast.makeText(MainActivity.this, "Message Sending Failed", Toast.LENGTH_SHORT).show();
ErrVar.printStackTrace();
}
}
else
{
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
{
requestPermissions(new String[]{Manifest.permission.SEND_SMS}, 10);
}
}
}
});
contact =(Button) findViewById(R.id.btn4);
contact.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
{
startActivity(new Intent(MainActivity.this,contacts.class));
}
}
});
String tempholder=getIntent().getStringExtra("Listviewclickvalue");
text.setText(tempholder);
}
}
contacts.java
package com.example.artist.sender;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import java.util.ArrayList;
import android.annotation.TargetApi;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.ContentResolver;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.provider.ContactsContract;
import android.util.Log;
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;
import static android.Manifest.permission.READ_CONTACTS;
public class contacts extends MainActivity {
private static final int REQUEST_READ_CONTACTS = 444;
private ListView mListView;
private ProgressDialog pDialog;
private Handler updateBarHandler;
ArrayList<String> contactList;
Cursor cursor;
int counter;
ListView list;
String temp;
TextView itemText;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
pDialog = new ProgressDialog(contacts.this);
pDialog.setMessage("Reading contacts...");
pDialog.setCancelable(false);
pDialog.show();
mListView = (ListView) findViewById(R.id.list);
updateBarHandler = new Handler();
// Since reading contacts takes more time, let's 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();
}
});
}
private boolean mayRequestContacts() {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
return true;
}
if (checkSelfPermission(READ_CONTACTS) == PackageManager.PERMISSION_GRANTED) {
return true;
}
if (shouldShowRequestPermissionRationale(READ_CONTACTS)) {
requestPermissions(new String[]{READ_CONTACTS}, REQUEST_READ_CONTACTS);
} else {
requestPermissions(new String[]{READ_CONTACTS}, REQUEST_READ_CONTACTS);
}
return false;
}
/**
* Callback received when a permissions request has been completed.
*/
#Override
public void onRequestPermissionsResult(int requestCode, String[] permissions,
int[] grantResults) {
if (requestCode == REQUEST_READ_CONTACTS) {
if (grantResults.length == 1 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
getContacts();
}
}
}
public void getContacts() {
if (!mayRequestContacts()) {
return;
}
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("\n First Name:" + 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 Phone number:" + 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();
String columns[] = {
ContactsContract.CommonDataKinds.Event.START_DATE,
ContactsContract.CommonDataKinds.Event.TYPE,
ContactsContract.CommonDataKinds.Event.MIMETYPE,
};*/
String where = ContactsContract.CommonDataKinds.Event.TYPE + "=" + ContactsContract.CommonDataKinds.Event.TYPE_BIRTHDAY +
" and " + ContactsContract.CommonDataKinds.Event.MIMETYPE + " = '" + ContactsContract.CommonDataKinds.Event.CONTENT_ITEM_TYPE + "' and " + ContactsContract.Data.CONTACT_ID + " = " + contact_id;
String[] selectionArgs = null;
String sortOrder = ContactsContract.Contacts.DISPLAY_NAME;
/*Cursor birthdayCur = contentResolver.query(ContactsContract.Data.CONTENT_URI, columns, where, selectionArgs, sortOrder);
Log.d("BDAY", birthdayCur.getCount()+"");
if (birthdayCur.getCount() > 0) {
while (birthdayCur.moveToNext()) {
String birthday = birthdayCur.getString(birthdayCur.getColumnIndex(ContactsContract.CommonDataKinds.Event.START_DATE));
output.append("Birthday :" + birthday);
Log.d("BDAY", birthday);
}
}
birthdayCur.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.contact_text, R.id.text1, contactList);
mListView.setAdapter(adapter);
}
});
// Dismiss the progressbar after 500 millisecondds
updateBarHandler.postDelayed(new Runnable() {
#Override
public void run() {
pDialog.cancel();
}
}, 500);
}
}
//passing the number to the mainactivity's textview through intent
list=(ListView) findViewById(R.id.list);
final String listview[] = new String[list.getCount()];
for (int j = 0; j < list.getCount(); j++) {
View v = list.getChildAt(j);
TextView tv = (TextView) v.findViewById(R.id.text1);
listview[j] = (String) tv.getText();
}
itemText = (TextView) findViewById(R.id.text1);
final String number = itemText.getText().toString();
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, android.R.id.text1, listview);
list.setAdapter(adapter);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if ((number.matches("[0-9]+"))&&(number.length()==10))
temp = listview[position].toString();
Intent intent = new Intent(contacts.this, MainActivity.class);
intent.putExtra("Listviewclickvalue", temp);
startActivity(intent);
}
}
);
}
}
logcat
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.artist.sender/com.example.artist.sender.contacts}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ListView.setOnItemClickListener(android.widget.AdapterView$OnItemClickListener)' on a null object reference
This is the logcat for the error. It keeps showing that the setitemOnClickListener keeps referring to a null object whereas, I've already assigned the listview to its respective id.
EDIT:**I've fixed part of the error, by renaming the setContentView(R.layout.activity_main); in the contacts class to setContentView(R.layout.contacts); But now after that, it shows this error, **java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.view.View.findViewById(int)' on a null object reference

If the data in the database, or some other storage, only pass the _id or the location, respectively.
Instead of passing many extras, Android way is, actually, Parcable. Here a nice tutorial from Vogella
public class TestModel implements Parcelable {
String name;
String phoneNumber;
//.....
#Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(this.name);
dest.writeString(this.phoneNumber);
}
public static final Parcelable.Creator<TestModel> CREATOR = new Parcelable.Creator<TestModel>() {
#Override
public TestModel createFromParcel(Parcel source) {
return new TestModel(source);
}
#Override
public TestModel[] newArray(int size) {
return new TestModel[size];
}
};
}

Passing data from one listview to another textview

I have been trying to pass the contact data from my second activity's list view to my main activity's list view, upon clicking the data.But the app crashes just on clicking the contacts button. How do I fix this?
MainActivity.java
package com.example.artist.sender;
import android.Manifest;
import android.app.AlertDialog;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Parcelable;
import android.provider.ContactsContract;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.telephony.SmsManager;
import android.text.Editable;
import android.text.TextUtils;
import android.util.SparseBooleanArray;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import org.w3c.dom.Text;
import java.util.ArrayList;
import java.util.List;
import static android.R.id.input;
import static android.app.AlertDialog.*;
public class MainActivity extends AppCompatActivity {
EditText itemText;
Button addButton;
Button sendText;
TextView text;
Button contact;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
itemText = (EditText) findViewById(R.id.editText);
addButton = (Button) findViewById(R.id.button1);
text=(TextView) findViewById(R.id.textView);
addButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (TextUtils.isEmpty(itemText.getText())||(itemText.getText().length()<10)||(itemText.getText().length()>10)) {
itemText.setError("The number is not valid.");
return;
} else {
text.setText(itemText.getText().toString());
itemText.setText("");
return;
}
}
});
Button delete;
delete = (Button) findViewById(R.id.btn2);
delete.setOnClickListener(new AdapterView.OnClickListener() {
#Override
public void onClick(View view) {
int con=text.getLineCount();
if(con==0)
Toast.makeText(MainActivity.this, "No number available to delete", Toast.LENGTH_SHORT).show();
else
text.setText("");
}
});
sendText=(Button) findViewById(R.id.btn3);
sendText.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
String phoneno = text.getText().toString();
int count = text.getLineCount();
SmsManager smsMgrVar = SmsManager.getDefault();
if (count == 0) {
Toast.makeText(MainActivity.this, "No number available", Toast.LENGTH_SHORT).show();
}
else
if (ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.SEND_SMS) == PackageManager.PERMISSION_GRANTED)
{
try{
smsMgrVar.sendTextMessage(phoneno, null, "Hey There!", null, null);
Toast.makeText(MainActivity.this, "Message Sent",Toast.LENGTH_LONG).show();
}
catch (Exception ErrVar)
{
Toast.makeText(MainActivity.this, "Message Sending Failed", Toast.LENGTH_SHORT).show();
ErrVar.printStackTrace();
}
}
else
{
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
{
requestPermissions(new String[]{Manifest.permission.SEND_SMS}, 10);
}
}
}
});
contact =(Button) findViewById(R.id.btn4);
contact.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
{
startActivity(new Intent(MainActivity.this,contacts.class));
}
}
});
String tempholder=getIntent().getStringExtra("Listviewclickvalue");
text.setText(tempholder);
}
contacts.java
package com.example.artist.sender;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import java.util.ArrayList;
import android.annotation.TargetApi;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.ContentResolver;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.provider.ContactsContract;
import android.util.Log;
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;
import static android.Manifest.permission.READ_CONTACTS;
public class contacts extends MainActivity {
private static final int REQUEST_READ_CONTACTS = 444;
private ListView mListView;
private ProgressDialog pDialog;
private Handler updateBarHandler;
ArrayList<String> contactList;
Cursor cursor;
int counter;
ListView list;
String temp;
TextView itemText;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.contacts);
pDialog = new ProgressDialog(contacts.this);
pDialog.setMessage("Reading contacts...");
pDialog.setCancelable(false);
pDialog.show();
mListView = (ListView) findViewById(R.id.list);
updateBarHandler = new Handler();
// Since reading contacts takes more time, let's 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();
}
});
}
private boolean mayRequestContacts() {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
return true;
}
if (checkSelfPermission(READ_CONTACTS) == PackageManager.PERMISSION_GRANTED)
{
return true;
}
if (shouldShowRequestPermissionRationale(READ_CONTACTS)) {
requestPermissions(new String[]{READ_CONTACTS}, REQUEST_READ_CONTACTS);
} else {
requestPermissions(new String[]{READ_CONTACTS}, REQUEST_READ_CONTACTS);
}
return false;
}
/**
* Callback received when a permissions request has been completed.
*/
#Override
public void onRequestPermissionsResult(int requestCode, String[] permissions,
int[] grantResults) {
if (requestCode == REQUEST_READ_CONTACTS) {
if (grantResults.length == 1 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
getContacts();
}
}
}
public void getContacts() {
if (!mayRequestContacts()) {
return;
}
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("\n First Name:" + 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 Phone number:" + 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();
String columns[] = {
ContactsContract.CommonDataKinds.Event.START_DATE,
ContactsContract.CommonDataKinds.Event.TYPE,
ContactsContract.CommonDataKinds.Event.MIMETYPE,
};*/
String where = ContactsContract.CommonDataKinds.Event.TYPE + "=" + ContactsContract.CommonDataKinds.Event.TYPE_BIRTHDAY +
" and " + ContactsContract.CommonDataKinds.Event.MIMETYPE + " = '" + ContactsContract.CommonDataKinds.Event.CONTENT_ITEM_TYPE + "' and " + ContactsContract.Data.CONTACT_ID + " = " + contact_id;
String[] selectionArgs = null;
String sortOrder = ContactsContract.Contacts.DISPLAY_NAME;
/*Cursor birthdayCur = contentResolver.query(ContactsContract.Data.CONTENT_URI, columns, where, selectionArgs, sortOrder);
Log.d("BDAY", birthdayCur.getCount()+"");
if (birthdayCur.getCount() > 0) {
while (birthdayCur.moveToNext()) {
String birthday = birthdayCur.getString(birthdayCur.getColumnIndex(ContactsContract.CommonDataKinds.Event.START_DATE));
output.append("Birthday :" + birthday);
Log.d("BDAY", birthday);
}
}
birthdayCur.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.contact_text, R.id.text1, contactList);
mListView.setAdapter(adapter);
}
});
// Dismiss the progressbar after 500 millisecondds
updateBarHandler.postDelayed(new Runnable() {
#Override
public void run() {
pDialog.cancel();
}
}, 500);
}
}
//passing the number to the mainactivity's textview through intent
list=(ListView) findViewById(R.id.list);
final String listview[] = new String[list.getCount()];
for (int j = 0; j < list.getCount(); j++) {
View v = list.getChildAt(j);
TextView tv = (TextView) v.findViewById(R.id.text1);
listview[j] = (String) tv.getText();
}
itemText = (TextView) findViewById(R.id.text1);
final String number = itemText.getText().toString();
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, android.R.id.text1, listview);
list.setAdapter(adapter);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if ((number.matches("[0-9]+"))&&(number.length()==10))
temp = listview[position].toString();
Intent intent = new Intent(contacts.this, MainActivity.class);
intent.putExtra("Listviewclickvalue", temp);
startActivity(intent);
}
}
);
}
logcat
java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.view.View.findViewById(int)' on a null object reference
at com.example.artist.sender.contacts.getContacts(contacts.java:236)
at com.example.artist.sender.contacts$1.run(contacts.java:57)
at java.lang.Thread.run(Thread.java:818)
This is the logcat for the error. It keeps showing that the findViewById keeps referring to a null object whereas, I've already assigned all the variables to their respective ids.

Android how to open a specific director in Gallery

My app takes a photo and saves in under Gallery/MyAppname/. I just want to open the My app's directory which is under Gallery. I just want to view all the pictures.
I want to see all the photos as same as Gallery app. Plese check the screenshot:-

You can use a MediaScannerConnectionClient implementation
package com.data.pictures;
import java.io.File;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.media.MediaScannerConnection;
import android.media.MediaScannerConnection.MediaScannerConnectionClient;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class Pictures extends Activity {
String SCAN_PATH;
File[] allFiles ;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_browse_picture);
File folder = new File(Environment.getExternalStorageDirectory().getPath()+"/test/");
allFiles = folder.listFiles();
((Button) findViewById(R.id.button1))
.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
new SingleMediaScanner(Pictures.this, allFiles[0]);
}
});
}
public class SingleMediaScanner implements MediaScannerConnectionClient {
private MediaScannerConnection mMs;
private File mFile;
public SingleMediaScanner(Context context, File f) {
mFile = f;
mMs = new MediaScannerConnection(context, this);
mMs.connect();
}
public void onMediaScannerConnected() {
mMs.scanFile(mFile.getAbsolutePath(), null);
}
public void onScanCompleted(String path, Uri uri) {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(uri);
startActivity(intent);
mMs.disconnect();
}
}
}
For updated question i would suggest use this link to understand Link

Following code opens the specific directory at Gallary. This code works fine for both older and new Android devices. I tested up to Android 6.
public static void openGallery(Context context) {
String bucketId = "";
final String[] projection = new String[] {"DISTINCT " + MediaStore.Images.Media.BUCKET_DISPLAY_NAME + ", " + MediaStore.Images.Media.BUCKET_ID};
final Cursor cur = context.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, projection, null, null, null);
while (cur != null && cur.moveToNext()) {
final String bucketName = cur.getString((cur.getColumnIndex(MediaStore.Images.ImageColumns.BUCKET_DISPLAY_NAME)));
if (bucketName.equals("Your_dir_name")) {
bucketId = cur.getString((cur.getColumnIndex(MediaStore.Images.ImageColumns.BUCKET_ID)));
break;
}
}
Uri mediaUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
if (bucketId.length() > 0) {
mediaUri = mediaUri.buildUpon()
.authority("media")
.appendQueryParameter("bucketId", bucketId)
.build();
}
if(cur != null){
cur.close();
}
Intent intent = new Intent(Intent.ACTION_VIEW, mediaUri);
context.startActivity(intent);
}

How to get contacts' photo?

I need to get contact's photo. So I get the contact's id and ues the folowing function to get photo.
Log.i(MenuActivity.TAG, "START: getContactPhoto; PARAMETERS: id: " + String.valueOf(id));
Uri photoUri = ContentUris.withAppendedId(ContactsContract.Contacts.CONTENT_URI, id);
Bitmap photo;
ContentResolver cr = context.getContentResolver();
InputStream is = ContactsContract.Contacts.openContactPhotoInputStream(cr, photoUri);
photo = BitmapFactory.decodeStream(is);
return photo;
And this to set the photo to imageView
if (photo != null) {
Log.d(MenuActivity.TAG, "Photo exists");
imageView.setImageBitmap(photo);
} else {
Log.e(MenuActivity.TAG, "No photo for contact " + name);
imageView.setImageResource(R.drawable.defult_foto);
}
My logcat:
START: getContactPhoto; PARAMETERS: id: 148
Photo uri: content://com.android.contacts/contacts/148
No photo for contact Ivan
The way I get contact id:
Uri uri = ContactsContract.Data.CONTENT_URI;
String[] projection = new String[]{
ContactsContract.Contacts._ID,
ContactsContract.Contacts.DISPLAY_NAME,
ContactsContract.CommonDataKinds.Event.CONTACT_ID,
ContactsContract.CommonDataKinds.Event.START_DATE,
};
String where =
ContactsContract.Data.MIMETYPE + "= ? AND " +
ContactsContract.CommonDataKinds.Event.TYPE + "=" + ContactsContract.CommonDataKinds.Event.TYPE_BIRTHDAY;
String[] selectionArgs = new String[]{ContactsContract.CommonDataKinds.Event.CONTENT_ITEM_TYPE};
String sortOrder = null;
ContentResolver cr = context.getContentResolver();
Cursor cursor = cr.query(uri, projection, where, selectionArgs, sortOrder);
if (cursor.moveToFirst()) {
while (cursor.moveToNext()) {
try {
id = "no-id";
birthday = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Event.START_DATE));
name = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
id = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts._ID));
// some code
} catch (Exception e) {
Log.e("Days", "No birthday date!");
}
}
}
cursor.close();
But it sais that none of my contact has photo, but it has. I belive smth is wrong. Any ideas?
P.S I'm a bit noob in andrid yet so if it won't be very difficult be specific

Use this sample code to fetch the thumbnails
Layout
<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"
tools:context=".MainActivity" >
<Spinner
android:id="#+id/spinner1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" />
<ImageView
android:id="#+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="#+id/spinner1"
android:layout_marginLeft="58dp"
android:layout_marginTop="60dp"
android:src="#drawable/ic_launcher" />
</RelativeLayout>
Activity code
package com.example.contactsdisplaypic;
import java.io.ByteArrayInputStream;
import android.app.Activity;
import android.content.ContentResolver;
import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.provider.ContactsContract.Contacts;
import android.support.v4.widget.CursorAdapter;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ImageView;
import android.widget.SimpleCursorAdapter;
import android.widget.Spinner;
import android.widget.Toast;
public class MainActivity extends Activity {
Context mContext;
public SimpleCursorAdapter sca;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mContext = this;
new LoadContactsTask().execute();
}
class LoadContactsTask extends AsyncTask<Void, Void, Cursor> {
#Override
protected Cursor doInBackground(Void... params) {
Uri uri = ContactsContract.Data.CONTENT_URI;
String[] projection = new String[]{
ContactsContract.Contacts._ID,
ContactsContract.Contacts.DISPLAY_NAME,
ContactsContract.CommonDataKinds.Event.CONTACT_ID,
ContactsContract.CommonDataKinds.Event.START_DATE,
};
String where =
ContactsContract.Data.MIMETYPE + "= ? AND " +
ContactsContract.CommonDataKinds.Event.TYPE + "=" +
ContactsContract.CommonDataKinds.Event.TYPE_BIRTHDAY;
String[] selectionArgs = new String[]{ContactsContract.CommonDataKinds.Event.CONTENT_ITEM_TYPE};
String sortOrder = null;
ContentResolver cr = mContext.getContentResolver();
Cursor cursor = cr.query(uri, projection, where, selectionArgs, sortOrder);
cursor.moveToFirst();
return cursor;
}
#Override
protected void onPostExecute(Cursor result) {
// create an array to specify which fields we want to display
String[] from = new String[]{ContactsContract.Contacts.DISPLAY_NAME,
ContactsContract.CommonDataKinds.Event.CONTACT_ID};
// create an array of the display item we want to bind our data to
int[] to = new int[]{android.R.id.text1, android.R.id.text2};
// create simple cursor adapter
sca =
new SimpleCursorAdapter(mContext, android.R.layout.simple_expandable_list_item_2, result, from, to,
CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);
sca.setDropDownViewResource( android.R.layout.simple_expandable_list_item_2 );
// get reference to our spinner
Spinner s = (Spinner) findViewById( R.id.spinner1 );
s.setAdapter(sca);
s.setOnItemSelectedListener(new OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parentView,
View selectedItemView, int position, long id) {
Toast.makeText(mContext, "contact id " + sca.getCursor().getString(2), Toast.LENGTH_LONG).show();
new LoadPicturesTask().execute(sca.getCursor().getString(2));
}
#Override
public void onNothingSelected(AdapterView<?> parentView) {
}
});
}
}
private class LoadPicturesTask extends AsyncTask<String, Void, Bitmap[]> {
#Override
protected Bitmap[] doInBackground(String... contactId) {
Bitmap[] array = new Bitmap[2];
Uri contactUri = ContentUris.withAppendedId(Contacts.CONTENT_URI,
Long.parseLong(contactId[0]));
// thumbnail
Uri photoUri = Uri.withAppendedPath(contactUri, Contacts.Photo.CONTENT_DIRECTORY);
Cursor cursor = getContentResolver().query(photoUri,
new String[] {Contacts.Photo.PHOTO}, null, null, null);
try {
if (cursor.moveToFirst()) {
byte[] data = cursor.getBlob(0);
if (data != null) {
array[0] = BitmapFactory.decodeStream(new ByteArrayInputStream(data));
}
}
} finally {
cursor.close();
}
return array;
}
#Override
protected void onPostExecute(Bitmap[] result) {
if (result != null) {
ImageView img1 = (ImageView) findViewById(R.id.imageView1);
img1.setImageBitmap(result[0]);
}
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
I was able to fetch some contacts for whom birthday was stored and then the thumbnail was fetched for whom it was available.

Android multiple contacts from groups and images

I want to do the following.
Pick up three to five contacts out of a special group of contacts or all contacts.
In the list it would be nice to show the contact image.
The selected contacts should have the following information (contact-id, first name, the small version of the contact image to save it as a blob in the database)
I found solutions for the different aspects.
-select multiple contacts:
How to obtain the checked rows in a custom view list
-show contacts from one group
getting contacts from a specified group in android
- photo problem
Getting a Photo from a Contact
But I dont know how to put those together. It would be great if someone could help me putting it together.
Thank you very much!
Frank J.
Solved it, but cant post the answer for some hours.

Solution (not prettyfied yet)
package com.pinkpony.frankj.contactpicker2;
import android.app.Activity;
import android.content.ClipData;
import android.content.ContentResolver;
import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.util.Log;
import android.util.SparseBooleanArray;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import android.app.Activity;
import android.content.ContentResolver;
import android.content.Context;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.util.SparseBooleanArray;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import java.util.List;
import java.util.ArrayList;
import java.util.Map;
/**
* Created by Frank on 28.07.2014.
*/
public class MainActivity extends Activity implements AdapterView.OnItemClickListener {
List<String> name1 = new ArrayList<String>();
List<String> name2 = new ArrayList<String>();
List<String> phno1 = new ArrayList<String>();
List<String> img1 = new ArrayList<String>();
MyAdapter ma ;
Button select;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
loadGroups();
//Toast.makeText(MainActivity.this, toString(), Toast.LENGTH_LONG).show();
Log.d("LongValue", toString());
getAllCallLogs(this.getContentResolver());
ListView lv= (ListView) findViewById(R.id.lv);
ma = new MyAdapter();
lv.setAdapter(ma);
lv.setOnItemClickListener(this);
lv.setItemsCanFocus(false);
lv.setTextFilterEnabled(true);
// adding
select = (Button) findViewById(R.id.button1);
select.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v) {
StringBuilder checkedcontacts= new StringBuilder();
System.out.println(".............."+ma.mCheckStates.size());
for(int i = 0; i < name1.size(); i++)
{
if(ma.mCheckStates.get(i)==true)
{
checkedcontacts.append(name1.get(i).toString());
checkedcontacts.append("\n");
}
else
{
System.out.println("..Not Checked......"+name1.get(i).toString());
}
}
//Toast.makeText(getApplicationContext(), checkedcontacts, 1000).show();
Toast.makeText(MainActivity.this, checkedcontacts, Toast.LENGTH_SHORT).show();
}
});
}
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
// TODO Auto-generated method stub
ma.toggle(arg2);
}
public void getAllCallLogs(ContentResolver cr) {
/* Uri uri = ContactsContract.Contacts.CONTENT_URI;
String[] projection = new String[] { ContactsContract.Contacts._ID,
ContactsContract.Contacts.DISPLAY_NAME };
String selection = ContactsContract.Contacts.IN_VISIBLE_GROUP + " = '"
+ ("1") + "'";
String[] selectionArgs = null;
String sortOrder = ContactsContract.Contacts.DISPLAY_NAME
+ " COLLATE LOCALIZED ASC";
Cursor phones = cr.query(uri, projection, selection, selectionArgs,
sortOrder);
*/
// long groupId = id;
String[] cProjection = { ContactsContract.Contacts.DISPLAY_NAME, ContactsContract.CommonDataKinds.GroupMembership.CONTACT_ID };
Cursor groupCursor = getContentResolver().query(
ContactsContract.Data.CONTENT_URI,
cProjection,
ContactsContract.CommonDataKinds.GroupMembership.GROUP_ROW_ID + "= ?" + " AND "
+ ContactsContract.CommonDataKinds.GroupMembership.MIMETYPE + "='"
+ ContactsContract.CommonDataKinds.GroupMembership.CONTENT_ITEM_TYPE + "'",
new String[] { String.valueOf(6) }, null);
if (groupCursor != null && groupCursor.moveToFirst())
{
do
{
int nameCoumnIndex = groupCursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME);
String name = groupCursor.getString(nameCoumnIndex);
String szFullname=name;
//long contactId = groupCursor.getLong(groupCursor.getColumnIndex(ContactsContract.CommonDataKinds.GroupMembership.CONTACT_ID));
long contactId = groupCursor.getLong(groupCursor.getColumnIndex(ContactsContract.CommonDataKinds.GroupMembership.CONTACT_ID));
// Log.d("your tag", "contact " + name + ":"+String.valueOf(contactId));
name1.add(name);
phno1.add(String.valueOf(contactId));
boolean foundToken = false;
// IDENTIFY Contact based on name and token
String szLookupKey = "";
Uri lkup = Uri.withAppendedPath(ContactsContract.Contacts.CONTENT_FILTER_URI, szFullname);
ContentResolver cr2 = getContentResolver();
Cursor idCursor = getContentResolver().query(lkup, null, null, null, null);
// get all the names
while (idCursor.moveToNext()) {
// get current row/contact ID = ID's are unreliable, so we will go for the lookup key
String szId = idCursor.getString(idCursor.getColumnIndex(ContactsContract.Contacts._ID));
String szName = idCursor.getString(idCursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
szLookupKey = idCursor.getString(idCursor.getColumnIndex(ContactsContract.Contacts.LOOKUP_KEY));
// for this contact ID, search the custom field
Log.d("", "Searching token:" + szId + " Name:" + szName + " LookupKey:" + szLookupKey);
//Log.d(LOG_TAG, "search: "+lid + " key: "+key + " name: "+name);
}
String whereName = ContactsContract.Data.MIMETYPE + " = ? AND " + ContactsContract.CommonDataKinds.StructuredName.CONTACT_ID + " = ?";
String[] whereNameParams = new String[] { ContactsContract.CommonDataKinds.StructuredName.CONTENT_ITEM_TYPE, String.valueOf(contactId) };
Cursor nameCur = getContentResolver().query(ContactsContract.Data.CONTENT_URI, null, whereName, whereNameParams, ContactsContract.CommonDataKinds.StructuredName.GIVEN_NAME);
while (nameCur.moveToNext()) {
String given = nameCur.getString(nameCur.getColumnIndex(ContactsContract.CommonDataKinds.StructuredName.GIVEN_NAME));
String family = nameCur.getString(nameCur.getColumnIndex(ContactsContract.CommonDataKinds.StructuredName.FAMILY_NAME));
String display = nameCur.getString(nameCur.getColumnIndex(ContactsContract.CommonDataKinds.StructuredName.DISPLAY_NAME));
Log.d("your tag", "Vorname " + ":" + given);
name2.add(given);
}
nameCur.close();
} while (groupCursor.moveToNext());
groupCursor.close();
}
}
class MyAdapter extends BaseAdapter implements CompoundButton.OnCheckedChangeListener
{ private SparseBooleanArray mCheckStates;
LayoutInflater mInflater;
TextView tv1,tv;
ImageView im1;
CheckBox cb;
MyAdapter()
{
mCheckStates = new SparseBooleanArray(name1.size());
mInflater = (LayoutInflater)MainActivity.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
private void retrieveContactPhoto(Long contactID) {
Bitmap photo = null;
try {
InputStream inputStream = ContactsContract.Contacts.openContactPhotoInputStream(getContentResolver(),
ContentUris.withAppendedId(ContactsContract.Contacts.CONTENT_URI, new Long(contactID)));
if (inputStream != null) {
photo = BitmapFactory.decodeStream(inputStream);
ImageView imageView = (ImageView) findViewById(R.id.imageView1);
imageView.setImageBitmap(photo);
}
assert inputStream != null;
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return name1.size();
}
#Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
public Bitmap openPhoto(long contactId) {
Uri contactUri = ContentUris.withAppendedId(ContactsContract.Contacts.CONTENT_URI, contactId);
Uri photoUri = Uri.withAppendedPath(contactUri, ContactsContract.Contacts.Photo.CONTENT_DIRECTORY);
Cursor cursor = getContentResolver().query(photoUri,
new String[] {ContactsContract.Contacts.Photo.PHOTO}, null, null, null);
if (cursor == null) {
return null;
}
try {
if (cursor.moveToFirst()) {
byte[] data = cursor.getBlob(0);
if (data != null) {
return BitmapFactory.decodeStream(new ByteArrayInputStream(data));
}
}
} finally {
cursor.close();
}
return null;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View vi=convertView;
if(convertView==null)
vi = mInflater.inflate(R.layout.row, null);
TextView tv= (TextView) vi.findViewById(R.id.textView1);
// tv1= (TextView) vi.findViewById(R.id.textView2);
im1= (ImageView) vi.findViewById(R.id.imageView1);
Bitmap photo = null;
Long contactID=Long.valueOf(phno1.get(position));
im1.setImageBitmap(openPhoto(contactID));
cb = (CheckBox) vi.findViewById(R.id.checkBox1);
tv.setText(""+ name1.get(position));
// tv1.setText(""+phno1.get(position));//
// retrieveContactPhoto(Long.valueOf(phno1.get(position)));
cb.setTag(position);
cb.setChecked(mCheckStates.get(position, false));
cb.setOnCheckedChangeListener(this);
return vi;
}
public boolean isChecked(int position) {
return mCheckStates.get(position, false);
}
public void setChecked(int position, boolean isChecked) {
mCheckStates.put(position, isChecked);
System.out.println("hello...........");
notifyDataSetChanged();
}
public void toggle(int position) {
setChecked(position, !isChecked(position));
}
#Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
// TODO Auto-generated method stub
mCheckStates.put((Integer) buttonView.getTag(), isChecked);
}
}
private class GroupInfo {
String id;
String title;
#Override
public String toString() {
return title+ " ("+id+")";
}
public String getId() {
return id;
}
}
List<GroupInfo> groups = new ArrayList<GroupInfo>();
public void loadGroups() {
final String[] GROUP_PROJECTION = new String[] {
ContactsContract.Groups._ID,
ContactsContract.Groups.TITLE,
ContactsContract.Groups.SUMMARY_WITH_PHONES
};
Cursor c = getContentResolver().query(
ContactsContract.Groups.CONTENT_SUMMARY_URI,
GROUP_PROJECTION,
ContactsContract.Groups.DELETED+"!='1' AND "+
ContactsContract.Groups.GROUP_VISIBLE+"!='0' "
,
null,
null);
final int IDX_ID = c.getColumnIndex(ContactsContract.Groups._ID);
final int IDX_TITLE = c.getColumnIndex(ContactsContract.Groups.TITLE);
Map<String,GroupInfo> m = new HashMap<String, GroupInfo>();
while (c.moveToNext()) {
GroupInfo g = new GroupInfo();
g.id = c.getString(IDX_ID);
g.title = c.getString(IDX_TITLE);
int users = c.getInt(c.getColumnIndex(ContactsContract.Groups.SUMMARY_WITH_PHONES));
if (users>0) {
// group with duplicate name?
GroupInfo g2 = m.get(g.title);
if (g2==null) {
m.put(g.title, g);
groups.add(g);
} else {
g2.id+=","+g.id;
}
}
Log.d("LongValue", g.id+g.title);
}
c.close();
}
}