在我的应用中，我允许用户选择五个联系人（逐个），以便我可以向选定的联系人发送自定义消息。我想将选定的联系人保存到DataBase。当用户点击＆＃34;选择联系人按钮＆＃34;时，它会打开手机的联系簿，所选联系人将显示在列表视图中。同样，他可以添加5个联系人，我想将它们保存在DataBase中。我已经能够编写一些代码，但不知道如何保存联系人。请帮助。
MainActivity.java
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
message = (EditText) findViewById(R.id.et_message);
DatabaseHandler db = new DatabaseHandler(this);
/**
* CRUD Operations
* */
// Inserting Contacts
Log.d("Insert: ", "Inserting ..");
// Reading all contacts
Log.d("Reading: ", "Reading all contacts..");
List<ContactItems> contacts = db.getAllContacts();
for (ContactItems cn : contacts) {
String log = "Id: "+cn.getType()+" ,Name: " + cn.getName() + " ,Phone: " + cn.getNumber();
// Writing Contacts to log
Log.d("Name: ", log);
}
/************************** saving custom message *****************************/
// for saving text that user can change as per need
final SharedPreferences preferences = PreferenceManager
.getDefaultSharedPreferences(this);
// loads the text that has been stored to SP and set it to Edit Text
message.setText(preferences.getString("autoSave", ""));
// adding addTextChangedListner() to the Edit Text View
message.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
// TODO Auto-generated method stub
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
// saving text after it is changed by the user
preferences.edit().putString("autoSave", s.toString()).commit();
}
});
ListView contactlist = (ListView) findViewById(R.id.contactListitems);
Resources res = getResources();
adapter = new CustomAdapter(MainActivity.this, selectedContactList, res);
contactlist.setAdapter(adapter);
/**************************EDIT******************************************/
contactlist.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
String contactData = selectedContactList.get(arg2).toString();
}
});
// defining button elements for picking contacts from phone-book
btn_cntct = (Button) findViewById(R.id.bpickperson);
btn_cntct.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
if (selectedContactList.size() < 5) {
// TODO Auto-generated method stub
// using Intent for fetching contacts from phone-book
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType(ContactsContract.CommonDataKinds.Phone.CONTENT_ITEM_TYPE);
startActivityForResult(intent, REQUESTCODE);
} else {
// print toast for not allowing user to add more contacts
Toast.makeText(getApplicationContext(),
"You Can Only Add 5 Contacts ", Toast.LENGTH_SHORT)
.show();
}
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if (data != null) {
Uri uri = data.getData();
Log.i("data", uri.toString());
if (uri != null) {
Cursor c = null;
try {
c = getContentResolver()
.query(uri,
new String[] {
ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME,
ContactsContract.CommonDataKinds.Phone.NUMBER,
ContactsContract.CommonDataKinds.Phone.TYPE },
null, null, null);
if (c != null && c.moveToFirst()) {
final ContactItems item = new ContactItems(
c.getString(0), c.getString(1), c.getInt(2));
item.setName(c.getString(0));
item.setNumber(c.getString(1));
item.setType(c.getInt(2));
selectedContactList.add(item);
Set<ContactItems> s = new TreeSet<ContactItems>(
new Comparator<ContactItems>() {
@Override
public int compare(ContactItems o1,
ContactItems o2) {
// for preventing duplicacy of contacts
// and calling toast
if (o1.number.equals(o2.number)) {
Toast.makeText(
getApplicationContext(),
"Selected Number Already Exists",
Toast.LENGTH_SHORT).show();
} else {
}
return o1.getNumber().compareTo(
o2.getNumber());
}
});
s.addAll(selectedContactList);
selectedContactList.clear();
selectedContactList.addAll(s);
adapter.notifyDataSetChanged();
// save the task list to preference
}
} finally {
if (c != null) {
c.close();
}
}
}
}
}
}
ContactItems.java
public class ContactItems {
String name = "";
String number = "";
int type = 0;
public ContactItems(String name, String number, int type) {
super();
this.name = name;
this.number = number;
this.type = type;
}
public ContactItems(Parcel source) {
// TODO Auto-generated constructor stub
this.name = source.readString();
this.number = source.readString();
this.type = source.readInt();
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getNumber() {
return number;
}
public void setNumber(String number) {
this.number = number;
}
public int getType() {
return type;
}
public void setType(int type) {
this.type = type;
}
public static final Parcelable.Creator<ContactItems> CREATOR = new Parcelable.Creator<ContactItems>() {
@Override
public ContactItems createFromParcel(Parcel source) {
return new ContactItems(source);
}
@Override
public ContactItems[] newArray(int size) {
return new ContactItems[size];
}
};
}
DatabaseHandler.java
public class DatabaseHandler extends SQLiteOpenHelper {
// All Static variables
// Database Version
private static final int DATABASE_VERSION = 1;
// Database Name
private static final String DATABASE_NAME = "contactManager";
// contact table name
private static final String TABLE_CONTACTS = "contacts";
// contacts table column names
private static final String KEY_NAME = "name";
private static final String KEY_PH_NO = "phone_number";
private static final String KEY_ID = "id";
public DatabaseHandler(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
// TODO Auto-generated constructor stub
}
// Creating Tables
@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
String CREATE_CONACTS_TABLE = "CREATE TABLE " + TABLE_CONTACTS + "("
+ KEY_ID + " INTEGER PRIMARY KEY," + KEY_NAME + " TEXT,"
+ KEY_PH_NO + " TEXT" + ")";
db.execSQL(CREATE_CONACTS_TABLE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
db.execSQL("DROP TABLE IF EXISTS" + TABLE_CONTACTS);
onCreate(db);
}
/**
* All CRUD(Create, Read, Update, Delete) Operations
*/
// Adding new contact
void addContact(ContactItems contact) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(KEY_NAME, contact.getName()); // Contact Name
values.put(KEY_PH_NO, contact.getNumber()); // Contact Phone
// Inserting Row
db.insert(TABLE_CONTACTS, null, values);
db.close(); // Closing database connection
}
// Getting single contact
ContactItems getContact(int id) {
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.query(TABLE_CONTACTS, new String[] { KEY_ID,
KEY_NAME, KEY_PH_NO }, KEY_ID + "=?",
new String[] { String.valueOf(id) }, null, null, null, null);
if (cursor != null)
cursor.moveToFirst();
ContactItems contact = new ContactItems(cursor.getString(2),
cursor.getString(1), Integer.parseInt(cursor.getString(0)));
// return contact
return contact;
}
// Getting All Contacts
public List<ContactItems> getAllContacts() {
List<ContactItems> contactList = new ArrayList<ContactItems>();
// Select All Query
String selectQuery = "SELECT * FROM " + TABLE_CONTACTS;
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
// looping through all rows and adding to list
if (cursor.moveToFirst()) {
do {
ContactItems contact = new ContactItems(null);
contact.setType(Integer.parseInt(cursor.getString(0)));
contact.setName(cursor.getString(1));
contact.setNumber(cursor.getString(2));
// Adding contact to list
contactList.add(contact);
} while (cursor.moveToNext());
}
// return contact list
return contactList;
}
// Updating single contact
public int updateContact(ContactItems contact) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(KEY_NAME, contact.getName());
values.put(KEY_PH_NO, contact.getNumber());
// updating row
return db.update(TABLE_CONTACTS, values, KEY_ID + " = ?",
new String[] { String.valueOf(contact.getType()) });
}
// Deleting single contact
public void deleteContact(ContactItems contact) {
SQLiteDatabase db = this.getWritableDatabase();
db.delete(TABLE_CONTACTS, KEY_ID + " = ?",
new String[] { String.valueOf(contact.getType()) });
db.close();
}
// Getting contacts Count
public int getContactsCount() {
String countQuery = "SELECT * FROM " + TABLE_CONTACTS;
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(countQuery, null);
cursor.close();
// return count
return cursor.getCount();
}
}
CustomAdapter.java
public class CustomAdapter extends BaseAdapter {
/*********** Declare Used Variables *********/
private Activity activity;
private ArrayList<ContactItems> data;
private static LayoutInflater inflater = null;
public Resources res;
// ListModel tempValues=null;
int i = 0;
String selectedNum = " ";
/************* CustomAdapter Constructor *****************/
public CustomAdapter(Activity a, ArrayList<ContactItems> d,
Resources resLocal) {
/********** Take passed values **********/
activity = a;
data = d;
res = resLocal;
/*********** Layout inflator to call external xml layout () ***********/
inflater = (LayoutInflater) activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
/******** What is the size of Passed Arraylist Size ************/
public int getCount() {
if (data.size() <= 0)
return 1;
return data.size();
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
/********* Create a holder Class to contain inflated xml file elements *********/
public static class ViewHolder {
public TextView text;
public TextView textNumber;
public ImageView image;
}
/****** Depends upon data size called for each row , Create each ListView row *****/
@SuppressLint("DefaultLocale")
public View getView(int position, View convertView, ViewGroup parent) {
final int pos = position;
View vi = convertView;
ViewHolder holder;
// check if converView is null, if it is null it probably means
if (convertView == null) {
/****** Inflate tabitem.xml file for each row ( Defined below ) *******/
vi = inflater.inflate(R.layout.contactlistitem, null);
/****** View Holder Object to contain tabitem.xml file elements ******/
// if it is not null, just reuse it from the recycler
holder = new ViewHolder();
holder.text = (TextView) vi.findViewById(R.id.contactname);
holder.textNumber = (TextView) vi.findViewById(R.id.contactnumber);
holder.image = (ImageView) vi.findViewById(R.id.deleteimage);
/************ Set holder with LayoutInflater ************/
vi.setTag(holder);
} else
holder = (ViewHolder) vi.getTag();
if (data.size() <= 0) {
holder.text.setText("Add Contacts");
holder.textNumber.setText(" ");
holder.image.setVisibility(View.GONE);
} else {
/***** Get each Model object from Arraylist ********/
/************ Set Model values in Holder elements ***********/
holder.text.setText("" + data.get(position).getName());
holder.textNumber.setText("" + data.get(position).getNumber());
holder.image.setVisibility(View.VISIBLE);
holder.image.setImageResource(res.getIdentifier("delete_button",
null, null));
holder.image.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
AlertDialog.Builder build = new AlertDialog.Builder(
activity);
build.setTitle("Delete");
build.setMessage("Are You Sure");
build.setPositiveButton("Delete",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
// TODO Auto-generated method stub
data.remove(pos);
MainActivity.adapter.notifyDataSetChanged();
dialog.dismiss();
}
});
/*
* data.remove(pos);
* MainActivity.adapter.notifyDataSetChanged();
*/
build.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
// TODO Auto-generated method stub
dialog.dismiss();
}
});
build.show();
}
});
/******** Set Item Click Listner for LayoutInflater for each row *******/
}
// return the view for a single item in the listview
return vi;
}
}