Rw8PFfZQ

1activity main
2
3
4<?xml version="1.0" encoding="utf-8"?>
5<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
6    xmlns:app="http://schemas.android.com/apk/res-auto"
7    xmlns:tools="http://schemas.android.com/tools"
8    android:orientation="vertical"
9    android:layout_width="match_parent"
10    android:layout_height="match_parent"
11    tools:context="com.example.vladimir.thirdfinal.MainActivity">
12
13    <EditText
14        android:id="@+id/fname"
15        android:layout_width="match_parent"
16        android:layout_height="wrap_content" />
17
18    <EditText
19        android:id="@+id/lname"
20        android:layout_width="match_parent"
21        android:layout_height="wrap_content" />
22
23    <EditText
24        android:id="@+id/num"
25        android:layout_width="match_parent"
26        android:layout_height="wrap_content" />
27
28    <Button
29        android:id="@+id/btn"
30        android:layout_width="match_parent"
31        android:layout_height="wrap_content"
32        android:text="Upload"
33        android:onClick="addToContactList"/>
34
35    <android.support.v7.widget.RecyclerView
36        android:id="@+id/rv"
37        android:layout_width="match_parent"
38        android:layout_height="wrap_content"></android.support.v7.widget.RecyclerView>
39
40
41</LinearLayout>
42
43
44
45main activity
46
47package com.example.vladimir.thirdfinal;
48
49import android.content.ContentValues;
50import android.database.Cursor;
51import android.database.sqlite.SQLiteDatabase;
52import android.support.v7.app.AppCompatActivity;
53import android.os.Bundle;
54import android.support.v7.widget.LinearLayoutManager;
55import android.support.v7.widget.RecyclerView;
56import android.util.Log;
57import android.view.View;
58import android.widget.EditText;
59
60public class MainActivity extends AppCompatActivity {
61
62    private ContactListAdapter mAdapter;
63    private SQLiteDatabase mDb;
64    private EditText mncn;
65    private EditText mncs;
66    private EditText mncnum;
67
68    private final static String LOG_TAG = MainActivity.class.getSimpleName();
69
70    @Override
71    protected void onCreate(Bundle savedInstanceState) {
72        super.onCreate(savedInstanceState);
73        setContentView(R.layout.activity_main);
74
75        RecyclerView crv;
76
77        crv = (RecyclerView) this.findViewById(R.id.rv);
78        mncn =(EditText) this.findViewById(R.id.fname);
79        mncs =(EditText) this.findViewById(R.id.lname);
80        mncnum =(EditText) this.findViewById(R.id.num);
81
82        crv.setLayoutManager(new LinearLayoutManager(this));
83
84        ContactDBHelper dbHelper = new ContactDBHelper(this);
85
86        mDb = dbHelper.getWritableDatabase();
87
88        Cursor cursor = getAllContacts();
89
90        mAdapter = new ContactListAdapter(this , cursor);
91
92        crv.setAdapter(mAdapter);
93    }
94
95    public void addToContactList(View view) {
96        if(mncn.getText().length() == 0 ||
97                mncs.getText().length() == 0 ||
98                mncnum.getText().length() == 0) {
99            return;
100        }
101        int phone = 0;
102        try {
103            phone = Integer.parseInt(mncnum.getText().toString());
104        }catch(NumberFormatException ex){
105            Log.e(LOG_TAG,"Failed to convert"+ex.getMessage());
106        }
107
108        addNewContact(mncn.getText().toString(),phone);
109
110        mAdapter.swapCursor(getAllContacts());
111
112        mncnum.clearFocus();
113
114        mncn.getText().clear();
115        mncs.getText().clear();
116        mncnum.getText().clear();
117    }
118
119    private Cursor getAllContacts() {
120        return mDb.query(
121                ContactContract.ContactEntry.TABLE_NAME,
122                null,
123                null,
124                null,
125                null,
126                null,
127                null
128        );
129    }
130
131    private long addNewContact(String name,String surename,int phone)
132    {
133        ContentValues cv = new ContentValues();
134        cv.put(ContactContract.ContactEntry.COLUMN_CONTACT_NAME, name);
135        cv.put(ContactContract.ContactEntry.COLUMN_CONTACT_SURENAME, surename);
136        cv.put(ContactContract.ContactEntry.COLUMN_CONTACT_NUMBER, phone);
137
138        return mDb.insert(ContactContract.ContactEntry.TABLE_NAME, null, cv);
139    }
140}
141
142
143contact xml
144
145
146
147<?xml version="1.0" encoding="utf-8"?>
148<LinearLayout
149    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
150    android:layout_height="match_parent"
151    android:orientation="vertical">
152
153    <TextView
154        android:id="@+id/txtv1"
155        android:layout_width="wrap_content"
156        android:layout_height="wrap_content"
157        android:text="TextView" />
158
159    <TextView
160        android:id="@+id/txtv2"
161        android:layout_width="wrap_content"
162        android:layout_height="wrap_content"
163        android:text="TextView" />
164
165    <TextView
166        android:id="@+id/txtv3"
167        android:layout_width="wrap_content"
168        android:layout_height="wrap_content"
169        android:text="TextView" />
170
171</LinearLayout>
172
173
174contactContract
175
176
177package com.example.vladimir.thirdfinal;
178
179import android.provider.BaseColumns;
180
181/**
182 * Created by Vladimir on 15.05.2018.
183 */
184
185public class ContactContract {
186
187    public static final class ContactEntry implements BaseColumns {
188        public static final String TABLE_NAME="contactlist";
189        public static final String COLUMN_CONTACT_NAME = "contactName";
190        public static final String COLUMN_CONTACT_SURENAME = "contactSurename";
191        public static final String COLUMN_CONTACT_NUMBER = "contactNumber";
192    }
193
194}
195
196
197contact db helper
198
199package com.example.vladimir.thirdfinal;
200
201import android.content.Context;
202import android.database.sqlite.SQLiteDatabase;
203import android.database.sqlite.SQLiteOpenHelper;
204
205
206
207/**
208 * Created by Vladimir on 15.05.2018.
209 */
210
211public class ContactDBHelper extends SQLiteOpenHelper {
212
213    private static final String DATABASE_NAME = "contacts.db";
214    private static final int DATABASE_VERSION = 1;
215
216    public ContactDBHelper(Context context) {
217
218        super(context,DATABASE_NAME,null,DATABASE_VERSION);
219
220    }
221
222    @Override
223    public void onCreate(SQLiteDatabase sqLiteDatabase) {
224
225        final String SQL_CREATE_CONTACTS_TABLE = "CREATE TABLE " + ContactContract.ContactEntry.TABLE_NAME + " (" +
226                ContactContract.ContactEntry._ID + " INTEGER PRIMARY KEY AUTOINCREMENT," +
227                ContactContract.ContactEntry.COLUMN_CONTACT_NAME + " TEXT NOT NULL," +
228                ContactContract.ContactEntry.COLUMN_CONTACT_SURENAME + " TEXT NOT NULL," +
229                ContactContract.ContactEntry.COLUMN_CONTACT_NUMBER + "INTEGER NOT NULL" +
230                "); ";
231
232        sqLiteDatabase.execSQL(SQL_CREATE_CONTACTS_TABLE);
233
234    }
235
236    @Override
237    public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i,int i1) {
238        sqLiteDatabase.execSQL("DROP TABLE IF EXISTS " + ContactContract.ContactEntry.TABLE_NAME);
239        onCreate(sqLiteDatabase);
240    }
241
242}
243
244contact list adapter
245
246
247package com.example.vladimir.thirdfinal;
248
249import android.content.Context;
250import android.database.Cursor;
251import android.support.v7.widget.RecyclerView;
252import android.view.LayoutInflater;
253import android.view.View;
254import android.view.ViewGroup;
255import android.widget.TextView;
256
257/**
258 * Created by Vladimir on 15.05.2018.
259 */
260
261public class ContactListAdapter extends RecyclerView.Adapter<ContactViewHolder> {
262
263    private Cursor mCursor;
264    private Context mContext;
265
266    public ContactListAdapter(Context context,Cursor cursor) {
267        this.mCursor = cursor;
268        this.mContext = context;
269    }
270
271    @Override
272    public ContactViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
273        LayoutInflater inflanter = LayoutInflater.from(mContext);
274        View view = inflanter.inflate(R.layout.contact,parent,false);
275        return new ContactViewHolder(view);
276    }
277
278    @Override
279    public void onBindViewHolder(ContactViewHolder holder, int position) {
280        if(!mCursor.moveToPosition(position))
281            return;
282
283        String name = mCursor.getString(mCursor.getColumnIndex(ContactContract.ContactEntry.COLUMN_CONTACT_NAME));
284        String surname = mCursor.getString(mCursor.getColumnIndex(ContactContract.ContactEntry.COLUMN_CONTACT_SURENAME));
285        String num = mCursor.getString(mCursor.getColumnIndex(ContactContract.ContactEntry.COLUMN_CONTACT_NUMBER));
286
287        holder.nametv.setText(name);
288        holder.surenametv.setText(surname);
289        holder.numtv.setText(num);
290    }
291
292    @Override
293    public int getItemCount() {
294        return mCursor.getCount();
295    }
296
297    public void swapCursor(Cursor newCursor) {
298        if(mCursor != null) mCursor.close();
299        mCursor=newCursor;
300        if (newCursor != null) {
301            this.notifyDataSetChanged();
302        }
303    }
304
305    class ContactViewHolder extends RecyclerView.ViewHolder {
306        TextView nametv;
307        TextView surenametv;
308        TextView numtv;
309
310        public ContactViewHolder(View itemView) {
311            super(itemView);
312
313            nametv = (TextView) itemView.findViewById(R.id.txtv1);
314            surenametv = (TextView) itemView.findViewById(R.id.txtv2);
315            numtv = (TextView) itemView.findViewById(R.id.txtv3);
316        }
317    }
318}