Complete BigTask

app/CastleEngineManifest.xml

@@ -7,4 +7,9 @@
     <custom_options><option>-B</option><option>-CX-</option><option>-XX-</option><option>-k--no-undefined</option><option>-k--no-gc-sections</option></custom_options>
     <library_paths />
   </compiler_options>
+  <android>
+    <services>
+      <service name="diagnostic_report_export" />
+    </services>
+  </android>
 </project>

app/android_services/diagnostic_report_export/app/src/main/java/io/castleengine/MainActivity.java

@@ -0,0 +1 @@
+services.add(new ServiceDiagnosticReportExport(this));

app/android_services/diagnostic_report_export/app/src/main/java/io/castleengine/ServiceDiagnosticReportExport.java

@@ -0,0 +1,100 @@
+package io.castleengine;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.net.Uri;
+import java.io.OutputStream;
+import java.nio.charset.StandardCharsets;
+
+public class ServiceDiagnosticReportExport extends ServiceAbstract
+{
+    private static final int REQUEST_CREATE_DOCUMENT = 40127;
+    private static String pendingJson;
+
+    public ServiceDiagnosticReportExport(MainActivity activity)
+    {
+        super(activity);
+    }
+
+    @Override
+    public String getName()
+    {
+        return "diagnostic_report_export";
+    }
+
+    @Override
+    public boolean messageReceived(String[] parts)
+    {
+        if (parts.length != 2 || !parts[0].equals("diagnostic-report-export")) {
+            return false;
+        }
+        if (pendingJson != null) {
+            sendError("Export already pending");
+            return true;
+        }
+
+        pendingJson = parts[1];
+        try {
+            Intent intent = new Intent(Intent.ACTION_CREATE_DOCUMENT);
+            intent.addCategory(Intent.CATEGORY_OPENABLE);
+            intent.setType("application/json");
+            intent.putExtra(Intent.EXTRA_TITLE, "kam-mobile-diagnostics.json");
+            getActivity().startActivityForResult(intent, REQUEST_CREATE_DOCUMENT);
+        } catch (Exception error) {
+            finishError(error);
+        }
+        return true;
+    }
+
+    @Override
+    public void onActivityResult(int requestCode, int resultCode, Intent intent)
+    {
+        if (requestCode != REQUEST_CREATE_DOCUMENT) {
+            return;
+        }
+        if (resultCode == Activity.RESULT_CANCELED) {
+            pendingJson = null;
+            messageSend(new String[] { "diagnostic-report-export-result", "cancel" });
+            return;
+        }
+        if (resultCode != Activity.RESULT_OK || intent == null || intent.getData() == null || pendingJson == null) {
+            finishError("Invalid export result");
+            return;
+        }
+
+        Uri uri = intent.getData();
+        String json = pendingJson;
+        try (OutputStream stream = getActivity().getContentResolver().openOutputStream(uri)) {
+            if (stream == null) {
+                throw new IllegalStateException("Document provider returned no output stream");
+            }
+            stream.write(json.getBytes(StandardCharsets.UTF_8));
+            stream.flush();
+        } catch (Exception error) {
+            finishError(error);
+            return;
+        }
+        pendingJson = null;
+        messageSend(new String[] { "diagnostic-report-export-result", "success" });
+    }
+
+    private void finishError(Exception error)
+    {
+        String message = error.getClass().getSimpleName();
+        if (error.getMessage() != null) {
+            message += ": " + error.getMessage();
+        }
+        finishError(message);
+    }
+
+    private void finishError(String message)
+    {
+        pendingJson = null;
+        sendError(message);
+    }
+
+    private void sendError(String message)
+    {
+        messageSend(new String[] { "diagnostic-report-export-result", "error", message });
+    }
+}