Writing to memory and reading from memory.

app/src/main/AndroidManifest.xml

@@ -11,7 +11,9 @@
         android:label="@string/app_name"
         android:theme="@style/AppTheme"
         tools:replace="android:icon,android:theme">
+
         <activity android:name=".SendReminder"></activity>
+
         <activity
             android:name=".MainActivity"
             android:label="@string/app_name">
@@ -21,15 +23,25 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+
         <activity
             android:name=".ReminderAddActivity"
-            android:label="@string/title_activity_add_reminder" />
+            android:label="@string/title_activity_add_reminder">
+            <intent-filter>
+                <action
+                    android:name="android.intent.action.PICK"/>
+                <category
+                    android:name="android.intent.category.DEFAULT"/>
+                <category
+                    android:name="android.intent.category.OPENABLE"/>
+                <data android:mimeType="text/plain"/>
+                <data android:mimeType="image/*"/>
+            </intent-filter>
+        </activity>
+
         <activity
             android:name=".ReminderEditActivity"
             android:label="@string/title_activity_edit_reminder" />
-        <activity
-            android:name=".LicencesActivity"
-            android:label="@string/title_activity_licenses" />
 
         <receiver android:name=".AlarmReceiver" />
         <receiver android:name=".BootReceiver">
@@ -38,9 +50,17 @@
             </intent-filter>
         </receiver>
 
-        <service
-            android:name=".AlarmService"
-            android:enabled="true" />
+        <provider
+            android:name="androidx.core.content.FileProvider"
+            android:authorities="com.blanyal.remindme.fileprovider"
+            android:exported="false"
+            android:grantUriPermissions="true">
+            <!-- ressource file to create -->
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/file_paths">
+            </meta-data>
+        </provider>
     </application>
 
 </manifest>
\ No newline at end of file

app/src/main/java/com/blanyal/remindme/MainActivity.java

@@ -42,8 +42,6 @@ import com.bignerdranch.android.multiselector.MultiSelector;
 import com.bignerdranch.android.multiselector.SwappingHolder;
 import com.google.android.material.floatingactionbutton.FloatingActionButton;
 
-import com.bignerdranch.android.multiselector.ModalMultiSelectorCallback;
-
 import java.text.DateFormat;
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
@@ -55,7 +53,7 @@ import java.util.List;
 
 
 public class MainActivity extends AppCompatActivity {
-    private RecyclerView mList;
+    private RecyclerView reminderListView;
     private SimpleAdapter mAdapter;
     private Toolbar mToolbar;
     private TextView mNoReminderView;
@@ -77,7 +75,7 @@ public class MainActivity extends AppCompatActivity {
         // Initialize views
         mToolbar = (Toolbar) findViewById(R.id.toolbar);
         mAddReminderButton = (FloatingActionButton) findViewById(R.id.add_reminder);
-        mList = (RecyclerView) findViewById(R.id.reminder_list);
+        reminderListView = (RecyclerView) findViewById(R.id.reminder_list);
         mNoReminderView = (TextView) findViewById(R.id.no_reminder_text);
 
         // To check is there are saved reminders
@@ -89,11 +87,11 @@ public class MainActivity extends AppCompatActivity {
         }
 
         // Create recycler view
-        mList.setLayoutManager(getLayoutManager());
-        registerForContextMenu(mList);
+        reminderListView.setLayoutManager(getLayoutManager());
+        registerForContextMenu(reminderListView);
         mAdapter = new SimpleAdapter();
         mAdapter.setItemCount(getDefaultItemCount());
-        mList.setAdapter(mAdapter);
+        reminderListView.setAdapter(mAdapter);
 
         // Setup toolbar
         setSupportActionBar(mToolbar);
@@ -371,7 +369,7 @@ public class MainActivity extends AppCompatActivity {
             @Override
             public void onClick(View v) {
                 if (!mMultiSelector.tapSelection(this)) {
-                    mTempPost = mList.getChildAdapterPosition(v);
+                    mTempPost = reminderListView.getChildAdapterPosition(v);
 
                     int mReminderClickID = IDmap.get(mTempPost);
                     selectReminder(mReminderClickID);

app/src/main/java/com/blanyal/remindme/NotificationHelper.java

@@ -67,7 +67,7 @@ public class NotificationHelper extends ContextWrapper {
                   .setContentTitle(getApplicationContext().getResources().getString(R.string.app_name))
                   .setTicker(mTitle)
                   .setContentText(mTitle)
-                  .setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION))
+                  .setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM))
                   .setContentIntent(mClick)
                   .setAutoCancel(true)
                   .setOnlyAlertOnce(true);

app/src/main/java/com/blanyal/remindme/ReminderAddActivity.java

@@ -20,11 +20,16 @@ package com.blanyal.remindme;
 import android.app.AlertDialog;
 import android.app.DatePickerDialog;
 import android.app.TimePickerDialog;
+import android.content.Context;
 import android.content.DialogInterface;
+import android.content.Intent;
+import android.net.Uri;
 import android.os.Bundle;
+import android.os.Environment;
 import android.text.Editable;
 import android.text.InputType;
 import android.text.TextWatcher;
+import android.util.Log;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
@@ -37,9 +42,15 @@ import android.widget.Toast;
 
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.widget.Toolbar;
+import androidx.core.app.ShareCompat;
+import androidx.core.content.FileProvider;
 
 import com.google.android.material.floatingactionbutton.FloatingActionButton;
 
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStreamWriter;
 import java.util.Calendar;
 
 
@@ -423,9 +434,8 @@ public class ReminderAddActivity extends AppCompatActivity {
             case R.id.save_reminder:
                 mTitleText.setText(mTitle);
 
-                if (mTitleText.getText().toString().length() == 0)
+                if (mTitleText.getText().toString().trim().length() == 0)
                     mTitleText.setError("Reminder Title cannot be blank!");
-
                 else {
                     saveReminder();
                 }
@@ -440,6 +450,42 @@ public class ReminderAddActivity extends AppCompatActivity {
                 onBackPressed();
                 return true;
 
+            // On clicking send reminder button
+            // Initiate sender routine
+            case R.id.send_reminder:
+
+                Context context = this;
+
+                //First write the data to a temporary file
+                String filename = "myfile.txt";
+                String fileContents = "Hello world!";
+                FileOutputStream outputStream;
+
+                try {
+                    outputStream = openFileOutput(filename, Context.MODE_PRIVATE);
+                    outputStream.write(fileContents.getBytes());
+                    outputStream.close();
+                } catch (Exception e) {
+                    e.printStackTrace();
+                }
+
+
+                //Pick the written file and send
+                File filePath = context.getFilesDir();
+                File fileToSend = new File(filePath, filename);
+                Uri fileUri = FileProvider.getUriForFile(context,
+                                                "com.blanyal.remindme.fileprovider", fileToSend);
+                Intent share = new Intent();
+                share.setAction(Intent.ACTION_SEND);
+                share.setDataAndType( fileUri, getContentResolver().getType(fileUri));
+                share.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
+                share.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
+                //share.setType("text/ovpn");
+                //share.putExtra(MediaStore.)
+                Intent shareIntent = Intent.createChooser(share, null);
+
+                startActivity(shareIntent);
+
             default:
                 return super.onOptionsItemSelected(item);
         }

app/src/main/res/xml/file_paths.xml

+<?xml version="1.0" encoding="utf-8"?>
+<paths xmlns:android="http://schemas.android.com/apk/res/android">
+    <root-path
+        name="root"
+        path="." />
+    <external-path
+        name="external"
+        path="." />
+    <external-files-path
+        name="external_files"
+        path="." />
+    <cache-path
+        name="cache"
+        path="." />
+    <external-cache-path
+        name="external_cache"
+        path="." />
+    <files-path
+        name="files"
+        path="." />
+</paths>
\ No newline at end of file