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Sample : Data persistence with local database #2

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Sample : Data persistence with local database #2

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32 changes: 18 additions & 14 deletions app/src/main/java/com/yalantis/beamazingtoday/sample/ExampleActivity.java
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Original file line number Diff line number Diff line change
Expand Up @@ -20,7 +20,6 @@
import com.yalantis.beamazingtoday.ui.widget.BatRecyclerView;
import com.yalantis.beamazingtoday.util.TypefaceUtil;

import java.util.ArrayList;
import java.util.List;

/**
Expand All @@ -31,8 +30,11 @@ public class ExampleActivity extends AppCompatActivity implements BatListener, O
private BatRecyclerView mRecyclerView;
private BatAdapter mAdapter;
private List<BatModel> mGoals;

private BatItemAnimator mAnimator;

private GoalDatabaseOpenHelper mDatabaseHelper;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Expand All @@ -47,19 +49,11 @@ protected void onCreate(Bundle savedInstanceState) {
mRecyclerView = (BatRecyclerView) findViewById(R.id.bat_recycler_view);
mAnimator = new BatItemAnimator();

mDatabaseHelper = GoalDatabaseOpenHelper.getInstance(this);
mGoals = mDatabaseHelper.getGoals();

mRecyclerView.getView().setLayoutManager(new LinearLayoutManager(this));
mRecyclerView.getView().setAdapter(mAdapter = new BatAdapter(mGoals = new ArrayList<BatModel>() {{
add(new Goal("first"));
add(new Goal("second"));
add(new Goal("third"));
add(new Goal("fourth"));
add(new Goal("fifth"));
add(new Goal("sixth"));
add(new Goal("seventh"));
add(new Goal("eighth"));
add(new Goal("ninth"));
add(new Goal("tenth"));
}}, this, mAnimator).setOnItemClickListener(this).setOnOutsideClickListener(this));
mRecyclerView.getView().setAdapter(mAdapter = new BatAdapter(mGoals, this, mAnimator).setOnItemClickListener(this).setOnOutsideClickListener(this));

ItemTouchHelper itemTouchHelper = new ItemTouchHelper(new BatCallback(this));
itemTouchHelper.attachToRecyclerView(mRecyclerView.getView());
Expand All @@ -76,19 +70,29 @@ public void onClick(View v) {

@Override
public void add(String string) {
mGoals.add(0, new Goal(string));
Goal goal = new Goal(string);
mDatabaseHelper.addGoal(goal);

mGoals.add(0, goal);
mAdapter.notify(AnimationType.ADD, 0);
}

@Override
public void delete(int position) {
Goal goal = (Goal)mGoals.get(position);
mDatabaseHelper.removeGoal(goal);

mGoals.remove(position);
mAdapter.notify(AnimationType.REMOVE, position);
}

@Override
public void move(int from, int to) {
if (from >= 0 && to >= 0) {
Goal goal = (Goal)mGoals.get(from);
goal.setChecked(!goal.isChecked());
mDatabaseHelper.updateCheckStatus(goal);

mAnimator.setPosition(to);
BatModel model = mGoals.get(from);
mGoals.remove(model);
Expand Down
12 changes: 12 additions & 0 deletions app/src/main/java/com/yalantis/beamazingtoday/sample/Goal.java
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Original file line number Diff line number Diff line change
Expand Up @@ -11,10 +11,18 @@ public class Goal implements BatModel {

private boolean isChecked;

private int id;

public Goal(String name) {
this.name = name;
}

public Goal(int id, String name, boolean isChecked) {
this.id = id;
this.name = name;
this.isChecked = isChecked;
}

public String getName() {
return name;
}
Expand All @@ -27,6 +35,10 @@ public void setChecked(boolean checked) {
isChecked = checked;
}

public int getId() { return id;}

public void setId(int id) { this.id = id; }

@Override
public boolean isChecked() {
return isChecked;
Expand Down
145 changes: 145 additions & 0 deletions app/src/main/java/com/yalantis/beamazingtoday/sample/GoalDatabaseOpenHelper.java
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Original file line number Diff line number Diff line change
@@ -0,0 +1,145 @@
package com.yalantis.beamazingtoday.sample;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;

import com.yalantis.beamazingtoday.interfaces.BatModel;

import java.util.ArrayList;
import java.util.List;

public class GoalDatabaseOpenHelper extends SQLiteOpenHelper {

private static GoalDatabaseOpenHelper sInstance;

// Database Info
private static final String DATABASE_NAME = "GoalsDatabase";
private static final int DATABASE_VERSION = 1;

// Table Names
private static final String TABLE_GOALS = "goals";

// User Table Columns
private static final String KEY_GOAL_ID = "id";
private static final String KEY_GOAL_LABEL = "label";
private static final String KEY_GOAL_CHECKED = "checked";

private GoalDatabaseOpenHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}

public static synchronized GoalDatabaseOpenHelper getInstance(Context context) {
if (sInstance == null) {
sInstance = new GoalDatabaseOpenHelper(context.getApplicationContext());
}
return sInstance;
}

@Override
public void onConfigure(SQLiteDatabase db) {
super.onConfigure(db);
db.setForeignKeyConstraintsEnabled(true);
}

@Override
public void onCreate(SQLiteDatabase db) {

String CREATE_USERS_TABLE = "CREATE TABLE " + TABLE_GOALS +
"(" +
KEY_GOAL_ID + " INTEGER PRIMARY KEY," +
KEY_GOAL_LABEL + " TEXT," +
KEY_GOAL_CHECKED + " BOOL DEFAULT 0" +
")";

db.execSQL(CREATE_USERS_TABLE);

List<BatModel> dummyGoals = new ArrayList<BatModel>() {{
add(new Goal("first"));
add(new Goal("second"));
add(new Goal("third"));
add(new Goal("fourth"));
add(new Goal("fifth"));
add(new Goal("sixth"));
add(new Goal("seventh"));
add(new Goal("eighth"));
add(new Goal("ninth"));
add(new Goal("tenth"));
}};

for (BatModel goal : dummyGoals) {
ContentValues value = new ContentValues();
value.put(KEY_GOAL_LABEL, goal.getText());
value.put(KEY_GOAL_CHECKED, goal.isChecked());
db.insert(TABLE_GOALS, null, value);
}
}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
if (oldVersion != newVersion) {
// Will be implemented when needed
}
}

public void addGoal(Goal goal) {
// Create and/or open the database for writing
SQLiteDatabase db = getWritableDatabase();
db.beginTransaction();
try {
ContentValues values = new ContentValues();
values.put(KEY_GOAL_LABEL, goal.getName());
values.put(KEY_GOAL_CHECKED, goal.isChecked());
db.insertOrThrow(TABLE_GOALS, null, values);

db.setTransactionSuccessful();
} catch (Exception e) {
Log.d(this.toString(), "Error while trying to add goal to database.");
} finally {
db.endTransaction();
}
}

public List<BatModel> getGoals() {
List<BatModel> goalList = new ArrayList<>();

SQLiteDatabase db = getReadableDatabase();
Cursor cursor = db.query(TABLE_GOALS, null, null, null, null, null, null);
try {
if (cursor.moveToFirst()) {
do {
int id = cursor.getInt(cursor.getColumnIndex(KEY_GOAL_ID));
String name = cursor.getString(cursor.getColumnIndex(KEY_GOAL_LABEL));
boolean isChecked = cursor.getInt(cursor.getColumnIndex(KEY_GOAL_CHECKED)) != 0;
System.err.println(isChecked);
goalList.add(new Goal(id, name, isChecked));
} while(cursor.moveToNext());
}
} catch (Exception e) {
Log.d(this.toString(), "Error while trying to get goals from database.");
} finally {
if (cursor != null && !cursor.isClosed()) {
cursor.close();
}
}
return goalList;
}

public boolean removeGoal(Goal goal) {
SQLiteDatabase db = getReadableDatabase();
String whereClause = KEY_GOAL_ID + "=?";
String[] whereArgs = new String[] { String.valueOf(goal.getId()) };
return db.delete(TABLE_GOALS, whereClause, whereArgs) != 0;
}

public boolean updateCheckStatus(Goal goal) {
SQLiteDatabase db = getReadableDatabase();
String whereClause = KEY_GOAL_ID + "=" + goal.getId();
ContentValues value = new ContentValues();
value.put(KEY_GOAL_CHECKED, goal.isChecked());
return db.update(TABLE_GOALS, value, whereClause, null) != 0;
}
}