Export feature

You can now export (it's an early stage) your manual entries to a file to restore it later
- Choose where to put your backup
- Code for encrypting data (will be enabled soon)
- Update version number to 0.0.6

app/build.gradle

@@ -6,10 +6,15 @@ android {
         applicationId "com.herbron.moodl"
         minSdkVersion 19
         targetSdkVersion 27
-        versionCode 5
+        versionCode 6
-        versionName "0.0.5"
+        versionName "0.0.6"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
     }
+
+    dataBinding {
+        enabled = true
+    }
+
     buildTypes {
         release {
             minifyEnabled false
@@ -32,7 +37,7 @@ dependencies {
     implementation 'com.android.support:cardview-v7:27.1.1'
     implementation 'com.mcxiaoke.volley:library:1.0.19'
     implementation 'com.diogobernardino:williamchart:2.5.0'
-    implementation 'com.android.support.constraint:constraint-layout:1.1.0'
+    implementation 'com.android.support.constraint:constraint-layout:1.1.2'
     implementation 'com.android.support:support-v4:27.1.1'
     implementation 'com.android.support:palette-v7:27.1.1'
     implementation 'com.daimajia.swipelayout:library:1.2.0@aar'
@@ -47,9 +52,11 @@ dependencies {
     implementation 'com.mattprecious.swirl:swirl:1.1.0'
     implementation 'com.wdullaer:materialdatetimepicker:3.5.2'
     implementation 'com.jmedeisis:draglinearlayout:1.1.0'
+    implementation 'com.applandeo:material-file-picker:1.0.0'
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'com.android.support.test:runner:1.0.2'
     androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
 
     implementation files('../libs/binance-api.jar')
+    implementation files('../libs/commons-codec-1.11.jar');
 }

app/src/main/java/com/herbron/moodl/Activities/SettingsActivity.java

@@ -7,6 +7,7 @@ import android.app.Dialog;
 import android.app.KeyguardManager;
 import android.content.Context;
 import android.content.DialogInterface;
+import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.pm.PackageManager;
 import android.content.res.Configuration;
@@ -42,7 +43,12 @@ import android.widget.LinearLayout;
 import android.widget.ProgressBar;
 import android.widget.TextView;
 
+import com.applandeo.FilePicker;
+import com.applandeo.constants.FileType;
+import com.applandeo.listeners.OnSelectFileListener;
 import com.herbron.moodl.BuildConfig;
+import com.herbron.moodl.DataManagers.DataCrypter;
+import com.herbron.moodl.DataManagers.DatabaseManager;
 import com.herbron.moodl.FingerprintToolkit.FingerprintDialogFragment;
 import com.herbron.moodl.FingerprintToolkit.FingerprintHandler;
 import com.herbron.moodl.MoodlBox;
@@ -64,10 +70,10 @@ import java.security.UnrecoverableKeyException;
 import java.security.cert.CertificateException;
 import java.text.SimpleDateFormat;
 import java.util.ArrayList;
-import java.util.Calendar;
 import java.util.Date;
 import java.util.List;
 import java.util.Locale;
+import java.util.regex.Pattern;
 
 import javax.crypto.Cipher;
 import javax.crypto.KeyGenerator;
@@ -169,7 +175,7 @@ public class SettingsActivity extends AppCompatPreferenceActivity {
         bindPreferenceSummaryToValue(findPreference("default_currency"));
         bindPreferenceSummaryToValue(findPreference("minimum_value_displayed"));
 
-        findPreference("import").setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
+        findPreference("export").setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
             @Override
             public boolean onPreferenceClick(Preference preference) {
 
@@ -178,7 +184,33 @@ public class SettingsActivity extends AppCompatPreferenceActivity {
                 View dialogView = LayoutInflater.from(context).inflate(R.layout.dialog_import_data, null, true);
                 dialogBuilder.setView(dialogView);
 
-                CheckBox enterPasswordCheckbox = dialogView.findViewById(R.id.checkboxEnterPassword);
+                File backupDirectory = new File(Environment.getExternalStorageDirectory(), getString(R.string.app_name));
+
+                if (!backupDirectory.exists()) {
+                    if (!backupDirectory.mkdirs()) {
+                        Log.d("moodl", "Error while creating directory");
+                    }
+                }
+
+                final TextView textViewFilePath = dialogView.findViewById(R.id.textViewFilePath);
+                textViewFilePath.setText(backupDirectory.getAbsolutePath());
+                textViewFilePath.setOnClickListener(new View.OnClickListener() {
+                    @Override
+                    public void onClick(View view) {
+                        new FilePicker.Builder(SettingsActivity.this, new OnSelectFileListener() {
+                            @Override
+                            public void onSelect(File file) {
+                                textViewFilePath.setText(file.getAbsolutePath());
+                            }
+                        }).fileType("moodl")
+                                .hideFiles(true)
+                                .directory(backupDirectory.getAbsolutePath())
+                                .mainDirectory(Environment.getExternalStorageDirectory().getAbsolutePath())
+                                .show();
+                    }
+                });
+
+                final CheckBox enterPasswordCheckbox = dialogView.findViewById(R.id.checkboxEnterPassword);
                 final TextInputLayout textInputLayoutPassword = dialogView.findViewById(R.id.textInputLayoutPassword);
 
                 enterPasswordCheckbox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@@ -196,54 +228,34 @@ public class SettingsActivity extends AppCompatPreferenceActivity {
                     }
                 });
 
-                dialogBuilder.setTitle("Restore backup");
+                dialogBuilder.setTitle("Create backup");
                 dialogBuilder.setPositiveButton("Confirm", new DialogInterface.OnClickListener() {
                     public void onClick(DialogInterface dialog, int whichButton) {
 
                         checkPermissions();
                         SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd_HH-mm-ss", Locale.getDefault());
                         Date currentDate = new Date();
-                        //String fileName = getString(R.string.app_name) + "_" + formatter.format(currentDate) + ".backup";
+                        String fileName = getString(R.string.app_name) + "_" + formatter.format(currentDate) + ".backup";
-                        String fileName = "backup.moodl";
+                        DatabaseManager databaseManager = new DatabaseManager(SettingsActivity.this);
 
-                        File dir = new File(Environment.getExternalStorageDirectory(), getString(R.string.app_name));
+                        File backupFile = new File(textViewFilePath.getText() + "/" + fileName);
-
-                        if (!dir.exists()) {
-                            if (!dir.mkdirs()) {
-                                Log.d("moodl", "Error while creating directory");
-                            }
-                        }
-
-                        File backupFile = new File(dir + "/" + fileName);
-
-                        if(backupFile.exists())
-                        {
-                            try (FileReader fileReader = new FileReader(backupFile)) {
-                                BufferedReader bufferedReader = new BufferedReader(fileReader);
-
-                                String line;
-
-                                while((line = bufferedReader.readLine()) != null)
-                                {
-                                    Log.d("moodl", line);
-                                }
-                            } catch (IOException e) {
-                                Log.d("moodl", "Error > " + e);
-                            }
-                        }
-                        else
-                        {
-                            Log.d("moodl", "Not backup file found");
 
                         try (PrintWriter printWriter = new PrintWriter(new FileWriter(backupFile, true))) {
 
-                                printWriter.write("Some data");
+                            if(enterPasswordCheckbox.isChecked())
+                            {
+                                DataCrypter.updateKey(textInputLayoutPassword.getEditText().getText().toString());
+                                printWriter.write(DataCrypter.encrypt(SettingsActivity.this, databaseManager.getBackupData()));
+                            }
+                            else
+                            {
+                                printWriter.write(databaseManager.getBackupData());
+                            }
 
                             printWriter.close();
                         } catch (IOException e) {
                             Log.d("moodl", "Error > " + e);
                         }
-                        }
 
                         dialog.dismiss();
                     }

app/src/main/java/com/herbron/moodl/DataManagers/DataCrypter.java

@@ -0,0 +1,66 @@
+package com.herbron.moodl.DataManagers;
+
+import android.content.Context;
+import android.util.Log;
+
+import com.herbron.moodl.R;
+
+import org.apache.commons.codec.binary.Base64;
+
+import java.io.UnsupportedEncodingException;
+import java.security.InvalidAlgorithmParameterException;
+import java.security.InvalidKeyException;
+import java.security.Key;
+import java.security.NoSuchAlgorithmException;
+
+import javax.crypto.BadPaddingException;
+import javax.crypto.Cipher;
+import javax.crypto.IllegalBlockSizeException;
+import javax.crypto.NoSuchPaddingException;
+import javax.crypto.spec.IvParameterSpec;
+import javax.crypto.spec.SecretKeySpec;
+
+public class DataCrypter {
+
+    private static Key aesKey;
+
+    public static void updateKey(String key)
+    {
+        for(int i = 0; key.getBytes().length < 32; i++)
+        {
+            key += "0";
+        }
+
+        try {
+            aesKey = new SecretKeySpec(key.getBytes("UTF-8"), "AES");
+        } catch (UnsupportedEncodingException e) {
+            Log.d("moodl", "Error while creating encryption key " + e.getMessage());
+        }
+    }
+
+    public static String encrypt(Context context, String data)
+    {
+        String encryptedData = null;
+
+        try {
+
+            IvParameterSpec ivParameterSpec = new IvParameterSpec(context.getString(R.string.ivKey).getBytes("UTF-8"));
+
+            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
+            cipher.init(Cipher.ENCRYPT_MODE, aesKey, ivParameterSpec);
+
+            byte[] encryptedBytes = cipher.doFinal(data.getBytes());
+
+            encryptedData = Base64.encodeBase64String(encryptedBytes);
+        } catch (NoSuchPaddingException | NoSuchAlgorithmException
+                | InvalidKeyException | BadPaddingException
+                | IllegalBlockSizeException | UnsupportedEncodingException
+                | InvalidAlgorithmParameterException e) {
+
+            Log.d("moodl", "Error while encrypting data " + e.getMessage());
+
+        }
+
+        return encryptedData;
+    }
+}

app/src/main/java/com/herbron/moodl/DataManagers/DatabaseManager.java

@@ -144,11 +144,33 @@ public class DatabaseManager extends SQLiteOpenHelper{
         return result.getInt(0);
     }
 
-    public int deleteCurrencyFromWatchlist(String symbol)
+    public void deleteCurrencyFromWatchlist(String symbol)
     {
         SQLiteDatabase db = this.getWritableDatabase();
 
-        return db.delete(TABLE_WATCHLIST, KEY_WATCHLIST_SYMBOL + " = '" + symbol + "'", null);
+        db.delete(TABLE_WATCHLIST, KEY_WATCHLIST_SYMBOL + " = '" + symbol + "'", null);
+        db.close();
+    }
+
+    public String getBackupData()
+    {
+        String selectQuerry = "SELECT * FROM " + TABLE_MANUAL_CURRENCIES;
+        SQLiteDatabase db = this.getWritableDatabase();
+        Cursor result = db.rawQuery(selectQuerry, null);
+
+        String backupData = "";
+
+        while(result.moveToNext())
+        {
+            for(int i = 0; i < result.getColumnCount(); i++)
+            {
+                backupData += result.getString(i) + ";@";
+            }
+
+            backupData += "\n";
+        }
+
+        return backupData;
     }
 
     public List<Currency> getAllCurrenciesFromWatchlist()

app/src/main/res/drawable/background_filepath.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item>
+        <shape android:shape="rectangle">
+            <solid android:color="@color/separationColor"/>
+
+            <corners android:radius="5dp"/>
+            <padding
+                android:left="3dp"
+                android:right="3dp"
+                android:top="3dp"
+                android:bottom="3dp"/>
+        </shape>
+    </item>
+</selector>

app/src/main/res/layout/dialog_import_data.xml

@@ -9,6 +9,13 @@
     android:padding="5dp"
     android:focusableInTouchMode="true">
 
+    <TextView
+        android:id="@+id/textViewFilePath"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:hint="Click to select"
+        android:background="@drawable/background_filepath"/>
+
     <CheckBox
         android:id="@+id/checkboxConserveData"
         android:layout_width="match_parent"
@@ -31,7 +38,8 @@
         android:id="@+id/checkboxEnterPassword"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:text="@string/enter_password"/>
+        android:text="@string/enter_password"
+        android:enabled="false"/>
 
     <android.support.design.widget.TextInputLayout
         android:id="@+id/textInputLayoutPassword"

app/src/main/res/values/strings.xml

@@ -21,6 +21,8 @@
 
     <string name="pref_title_version">Version</string>
 
+    <string name="ivKey">0123456789MoodlH</string> <!--Must be 16 characters-->
+
     <string name="pref_title_export">Export manual entries</string>
     <string name="pref_title_import">Import manual entries</string>
 

app/src/main/res/xml/pref_main.xml

@@ -28,11 +28,11 @@
         android:title="@string/pref_title_category_data_backup">
 
         <PreferenceScreen android:title="@string/pref_title_export"
-            android:key="export"
+            android:key="export"/>
-            android:enabled="false"/>
 
         <Preference android:title="@string/pref_title_import"
-            android:key="import"/>
+            android:key="import"
+            android:enabled="false"/>
 
     </PreferenceCategory>
 

build.gradle

@@ -19,9 +19,8 @@ allprojects {
     repositories {
         google()
         jcenter()
-        maven {
+        maven { url "https://jitpack.io" }
-            url "https://jitpack.io"
+        maven { url "http://dl.bintray.com/lukaville/maven" }
-        }
     }
 }