exporting data to file

app/build.gradle

@@ -58,6 +58,5 @@ dependencies {
     implementation 'org.apache.poi:poi:3.12'
  //   implementation 'org.apache.poi:poi-ooxml:3.12'
     implementation 'com.fasterxml:aalto-xml:1.0.0'
-    implementation 'net.rdrei.android.dirchooser:library:3.2@aar'
 
 }

app/src/main/AndroidManifest.xml

@@ -1,8 +1,14 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
     package="cc.pogoda.mobile.pogodacc">
 
     <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.MANAGE_DOCUMENTS"
+        tools:ignore="ProtectedPermissions" />
+
 
     <application
         android:allowBackup="true"

app/src/main/java/cc/pogoda/mobile/pogodacc/activity/ExportDataActivity.java

@@ -4,8 +4,12 @@ import androidx.annotation.Nullable;
 import androidx.appcompat.app.AppCompatActivity;
 
 import android.content.Intent;
+import android.content.UriPermission;
+import android.database.Cursor;
 import android.net.Uri;
 import android.os.Bundle;
+import android.provider.DocumentsContract;
+import android.provider.MediaStore;
 import android.text.Editable;
 import android.view.View;
 import android.widget.ArrayAdapter;
@@ -21,6 +25,12 @@ import org.greenrobot.eventbus.ThreadMode;
 import org.threeten.bp.ZoneId;
 import org.threeten.bp.ZonedDateTime;
 
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.PrintWriter;
+import java.util.List;
+
 import cc.pogoda.mobile.pogodacc.R;
 import cc.pogoda.mobile.pogodacc.dao.StationDataDao;
 import cc.pogoda.mobile.pogodacc.file.ExcelExport;
@@ -35,7 +45,7 @@ public class ExportDataActivity extends AppCompatActivity {
 
     private Button selectStationButton;
 
-    private Button startExportButton;
+    private Button startExportButton, outputFileButton;
 
     private Spinner outputFormat;
 
@@ -49,19 +59,33 @@ public class ExportDataActivity extends AppCompatActivity {
 
     WeatherStation stationToExport = null;
 
+    Uri exportUri;
+
     public WeatherStation getStationToExport() {
         return stationToExport;
     }
 
     public void openDirectory(Uri uriToLoad) {
-        // Choose a directory using the system's file picker.
+//        // Choose a directory using the system's file picker.
-        Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT_TREE);
+//        Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT_TREE);
+//
+//        // Optionally, specify a URI for the directory that should be opened in
+//        // the system file picker when it loads.
+//        //intent.putExtra(DocumentsContract.EXTRA_INITIAL_URI, uriToLoad);
+//
+//        act.startActivityForResult(intent, 123);
+
+        Intent intent = new Intent(Intent.ACTION_CREATE_DOCUMENT);
+        intent.addCategory(Intent.CATEGORY_OPENABLE);
+        intent.setType("application/vnd.ms-excel");
+        intent.putExtra(Intent.EXTRA_TITLE, "text.xls");
 
         // Optionally, specify a URI for the directory that should be opened in
-        // the system file picker when it loads.
+        // the system file picker when your app creates the document.
-        //intent.putExtra(DocumentsContract.EXTRA_INITIAL_URI, uriToLoad);
+        //intent.putExtra(DocumentsContract.EXTRA_INITIAL_URI, pickerInitialUri);
+
+        startActivityForResult(intent, 123);
 
-        act.startActivityForResult(intent, 123);
     }
 
     public int getExportLnInHours() {
@@ -108,7 +132,7 @@ public class ExportDataActivity extends AppCompatActivity {
 
         switch (selected) {
             case "CSV" : return 1;
-            case "MS Excel XLSX": return 2;
+            case "MS Excel XLS": return 2;
         }
 
         return -1;
@@ -117,17 +141,30 @@ public class ExportDataActivity extends AppCompatActivity {
     @Override
     protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
 
-        String s;
-
         if (requestCode == 123 && resultCode == RESULT_OK) {
             Uri uri = data.getData();
 
-            String decoded = Uri.decode(uri.toString());
+            grantUriPermission(getPackageName(), uri, Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
+            getContentResolver().takePersistableUriPermission(uri, Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
 
-            s = uri.getPath();
+            exportUri = uri;
 
-            System.out.println(decoded);
+//            try {
-            System.out.println(s);
+//
+//                OutputStream out = getContentResolver().openOutputStream(uri);
+//
+//                PrintWriter writer = new PrintWriter(out);
+//
+//                writer.write("dupajasia");
+//
+//                writer.flush();
+//                writer.close();
+//                out.close();
+//            } catch (FileNotFoundException e) {
+//                e.printStackTrace();
+//            } catch (IOException e) {
+//                e.printStackTrace();
+//            }
 
         }
 
@@ -152,6 +189,15 @@ public class ExportDataActivity extends AppCompatActivity {
         exportLn = findViewById(R.id.editTextNumberExport);
         datePicker = findViewById(R.id.datePickerExportStartDate);
         outputFormat = findViewById(R.id.spinnerOutputFormat);
+        outputFileButton = findViewById(R.id.buttonExportTarget);
+
+        outputFileButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                openDirectory(null);
+
+            }
+        });
 
         selectStationButton.setOnClickListener(new View.OnClickListener() {
 
@@ -187,10 +233,12 @@ public class ExportDataActivity extends AppCompatActivity {
 
                     int format = act.getOutputFormat();
 
-                    openDirectory(null);
-
                     if (format == 2) {
-                        ExcelExport.exportToExcel(stationData, toExport, act.getApplicationContext());
+                        try {
+                            ExcelExport.exportToExcel(stationData, toExport, act.getApplicationContext(), getContentResolver().openOutputStream(exportUri));
+                        } catch (FileNotFoundException e) {
+                            e.printStackTrace();
+                        }
 
                     }
 

app/src/main/java/cc/pogoda/mobile/pogodacc/file/ExcelExport.java

@@ -15,6 +15,7 @@ import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
+import java.io.OutputStream;
 
 import cc.pogoda.mobile.pogodacc.type.WeatherStation;
 import cc.pogoda.mobile.pogodacc.type.web.ListOfStationData;
@@ -22,7 +23,11 @@ import cc.pogoda.mobile.pogodacc.type.web.ListOfStationData;
 public class ExcelExport {
 
 
-    public static boolean exportToExcel(ListOfStationData data, WeatherStation station, Context context) {
+    public static boolean exportToExcel(ListOfStationData data, WeatherStation station, Context context, OutputStream out) {
+
+        if (out == null) {
+            return false;
+        }
 
         Cell cell;
 
@@ -56,13 +61,12 @@ public class ExcelExport {
         cell = header.createCell(7);
         cell.setCellValue("Wind Gusts");
 
-        File file = new File(context.getExternalFilesDir(null), "test.xls");
-        FileOutputStream fileOutputStream = null;
 
         try {
-            fileOutputStream = new FileOutputStream(file);
+            workbook.write(out);
 
-            workbook.write(fileOutputStream);
+            out.flush();
+            out.close();
         } catch (FileNotFoundException e) {
             e.printStackTrace();
         } catch (IOException e) {

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

@@ -13,7 +13,7 @@
         android:layout_width="362dp"
         android:layout_height="47dp"
         android:layout_marginStart="28dp"
-        android:layout_marginTop="44dp"
+        android:layout_marginTop="32dp"
         android:layout_marginEnd="21dp"
         android:backgroundTint="#56039BE5"
         android:text="@string/select_station_export"
@@ -25,9 +25,7 @@
         android:id="@+id/textViewStationToExport"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginStart="175dp"
+        android:layout_marginTop="8dp"
-        android:layout_marginTop="14dp"
-        android:layout_marginEnd="178dp"
         android:fontFamily="@font/alegreya_sans_sc_medium"
         android:text="@string/dash"
         android:textAllCaps="true"
@@ -40,23 +38,23 @@
         android:id="@+id/spinnerOutputFormat"
         android:layout_width="247dp"
         android:layout_height="29dp"
-        android:layout_marginTop="52dp"
+        android:layout_marginTop="8dp"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/textViewStationToExport" />
+        app:layout_constraintTop_toBottomOf="@+id/textView" />
 
     <TextView
         android:id="@+id/textView"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginTop="64dp"
+        android:layout_marginTop="16dp"
         android:fontFamily="@font/alegreya_sans_sc_medium"
         android:text="@string/output_export_format"
         android:textSize="20sp"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintHorizontal_bias="0.498"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/buttonSelectStationExport" />
+        app:layout_constraintTop_toBottomOf="@+id/textViewStationToExport" />
 
 
     <DatePicker
@@ -77,12 +75,11 @@
         android:id="@+id/textView2"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginTop="12dp"
+        android:layout_marginTop="16dp"
         android:fontFamily="@font/alegreya_sans_sc_medium"
-        android:text="@string/start_data"
+        android:text="@string/export_from"
         android:textSize="20sp"
         app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="0.497"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@+id/spinnerOutputFormat" />
 
@@ -90,7 +87,7 @@
         android:id="@+id/editTextNumberExport"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginTop="12dp"
+        android:layout_marginTop="8dp"
         android:ems="10"
         android:inputType="number"
         app:layout_constraintEnd_toEndOf="parent"
@@ -102,7 +99,7 @@
         android:id="@+id/textView3"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginTop="22dp"
+        android:layout_marginTop="16dp"
         android:fontFamily="@font/alegreya_sans_sc_medium"
         android:text="@string/export_ln"
         android:textSize="20sp"
@@ -125,10 +122,22 @@
         android:id="@+id/buttonExportStart"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginTop="9dp"
         android:backgroundTint="#56039BE5"
         android:text="@string/start_export"
         app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.498"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/buttonExportTarget" />
+
+    <Button
+        android:id="@+id/buttonExportTarget"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:backgroundTint="#56039BE5"
+        android:text="@string/output_fn"
+        app:iconTint="#56039BE5"
+        app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@+id/editTextNumberExport" />
 

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

@@ -121,7 +121,7 @@
     <string name="holfuy_id" translatable="false">Holfuy ID</string>
     <string name="email" translatable="false">Email</string>
     <string name="csv" translatable="false">CSV</string>
-    <string name="xlsx" translatable="false">MS Excel XLSX</string>
+    <string name="xlsx" translatable="false">MS Excel XLS</string>
     <string-array name="export_formats">
         <item>@string/email</item>
         <item>@string/csv</item>