Fix Android compilation issues

 # Changelog
 
+## 3.6.3
+
+- Fix Android compilation issues
+
 ## 3.6.2
 
 - Added theme color to dropdown item in pageFormat selector in page preview

@@ -35,16 +35,6 @@ for documentation.
       use_frameworks!    # <-- Add this line
    ```
 
-4. Set minimum Android version in `android/app/build.gradle`:
-
-   ```java
-   defaultConfig {
-       ...
-       minSdkVersion 21  // <-- Change this line to 21 or more
-       ...
-   }
-   ```
-
 ## Examples
 
 ```dart

@@ -17,16 +17,20 @@
 package android.print;
 
 import android.content.Context;
+import android.os.Build;
 import android.os.CancellationSignal;
 import android.os.ParcelFileDescriptor;
 import android.util.Log;
 
+import androidx.annotation.RequiresApi;
+
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
 
+@RequiresApi(api = Build.VERSION_CODES.KITKAT)
 public class PdfConvert {
     public static void print(final Context context, final PrintDocumentAdapter adapter,
             final PrintAttributes attributes, final Result result) {

 package net.nfet.flutter.printing;
 
 import android.app.Activity;
+import android.os.Build;
 import android.print.PrintAttributes;
 
 import androidx.annotation.NonNull;
+import androidx.annotation.RequiresApi;
 
 import java.util.HashMap;
 
@@ -21,15 +23,10 @@ public class PrintingHandler implements MethodChannel.MethodCallHandler {
 
     @Override
     public void onMethodCall(@NonNull MethodCall call, @NonNull MethodChannel.Result result) {
+        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT) {
             switch (call.method) {
                 case "printPdf": {
                     final String name = call.argument("name");
-                final Double width = call.argument("width");
-                final Double height = call.argument("height");
-                final Double marginLeft = call.argument("marginLeft");
-                final Double marginTop = call.argument("marginTop");
-                final Double marginRight = call.argument("marginRight");
-                final Double marginBottom = call.argument("marginBottom");
 
                     final PrintingJob printJob =
                             new PrintingJob(activity, this, (int) call.argument("job"));
@@ -70,14 +67,15 @@ public class PrintingHandler implements MethodChannel.MethodCallHandler {
                     assert marginRight != null;
                     assert marginBottom != null;
 
-                PrintAttributes.Margins margins =
-                        new PrintAttributes.Margins(Double.valueOf(marginLeft * 1000.0).intValue(),
+                    PrintAttributes.Margins margins = new PrintAttributes.Margins(
+                            Double.valueOf(marginLeft * 1000.0).intValue(),
                             Double.valueOf(marginTop * 1000.0 / 72.0).intValue(),
                             Double.valueOf(marginRight * 1000.0 / 72.0).intValue(),
                             Double.valueOf(marginBottom * 1000.0 / 72.0).intValue());
 
-                PrintAttributes.MediaSize size = new PrintAttributes.MediaSize("flutter_printing",
-                        "Provided size", Double.valueOf(width * 1000.0 / 72.0).intValue(),
+                    PrintAttributes.MediaSize size =
+                            new PrintAttributes.MediaSize("flutter_printing", "Provided size",
+                                    Double.valueOf(width * 1000.0 / 72.0).intValue(),
                                     Double.valueOf(height * 1000.0 / 72.0).intValue());
 
                     printJob.convertHtml((String) call.argument("html"), size, margins,
@@ -103,9 +101,13 @@ public class PrintingHandler implements MethodChannel.MethodCallHandler {
                     result.notImplemented();
                     break;
             }
+        } else {
+            result.notImplemented();
+        }
     }
 
     /// Request the Pdf document from flutter
+    @RequiresApi(api = Build.VERSION_CODES.KITKAT)
     void onLayout(final PrintingJob printJob, Double width, double height, double marginLeft,
             double marginTop, double marginRight, double marginBottom) {
         HashMap<String, Object> args = new HashMap<>();
@@ -141,6 +143,7 @@ public class PrintingHandler implements MethodChannel.MethodCallHandler {
     }
 
     /// send completion status to flutter
+    @RequiresApi(api = Build.VERSION_CODES.KITKAT)
     void onCompleted(PrintingJob printJob, boolean completed, String error) {
         HashMap<String, Object> args = new HashMap<>();
         args.put("completed", completed);
@@ -152,6 +155,7 @@ public class PrintingHandler implements MethodChannel.MethodCallHandler {
     }
 
     /// send html to pdf data result to flutter
+    @RequiresApi(api = Build.VERSION_CODES.KITKAT)
     void onHtmlRendered(PrintingJob printJob, byte[] pdfData) {
         HashMap<String, Object> args = new HashMap<>();
         args.put("doc", pdfData);
@@ -161,6 +165,7 @@ public class PrintingHandler implements MethodChannel.MethodCallHandler {
     }
 
     /// send html to pdf conversion error to flutter
+    @RequiresApi(api = Build.VERSION_CODES.KITKAT)
     void onHtmlError(PrintingJob printJob, String error) {
         HashMap<String, Object> args = new HashMap<>();
         args.put("error", error);
@@ -170,6 +175,7 @@ public class PrintingHandler implements MethodChannel.MethodCallHandler {
     }
 
     /// send pdf to raster data result to flutter
+    @RequiresApi(api = Build.VERSION_CODES.KITKAT)
     void onPageRasterized(PrintingJob printJob, byte[] imageData, int width, int height) {
         HashMap<String, Object> args = new HashMap<>();
         args.put("image", imageData);
@@ -180,6 +186,8 @@ public class PrintingHandler implements MethodChannel.MethodCallHandler {
         channel.invokeMethod("onPageRasterized", args);
     }
 
+    /// The page has been converted to an image
+    @RequiresApi(api = Build.VERSION_CODES.KITKAT)
     void onPageRasterEnd(PrintingJob printJob) {
         HashMap<String, Object> args = new HashMap<>();
         args.put("job", printJob.index);

@@ -18,20 +18,35 @@ package net.nfet.flutter.printing;
 
 import android.content.Context;
 import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
 import android.content.res.Configuration;
+import android.graphics.Bitmap;
+import android.graphics.Matrix;
+import android.graphics.pdf.PdfRenderer;
 import android.net.Uri;
+import android.os.Build;
 import android.os.Bundle;
 import android.os.CancellationSignal;
+import android.os.Handler;
+import android.os.Looper;
 import android.os.ParcelFileDescriptor;
 import android.print.PageRange;
 import android.print.PdfConvert;
 import android.print.PrintAttributes;
+import android.print.PrintDocumentAdapter;
+import android.print.PrintDocumentInfo;
 import android.print.PrintJob;
+import android.print.PrintJobInfo;
 import android.print.PrintManager;
+import android.util.Log;
 import android.webkit.WebView;
 import android.webkit.WebViewClient;
+
 import androidx.annotation.NonNull;
+import androidx.annotation.RequiresApi;
 import androidx.core.content.FileProvider;
+
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
@@ -39,16 +54,12 @@ import java.io.IOException;
 import java.io.OutputStream;
 import java.nio.ByteBuffer;
 import java.util.HashMap;
-import android.content.pm.PackageManager;
-import android.content.pm.ProviderInfo;
-import android.content.pm.ResolveInfo;
 import java.util.List;
 
-
-
 /**
  * PrintJob
  */
+@RequiresApi(api = Build.VERSION_CODES.KITKAT)
 public class PrintingJob extends PrintDocumentAdapter {
     private static PrintManager printManager;
     private final Context context;
@@ -216,11 +227,14 @@ public class PrintingJob extends PrintDocumentAdapter {
             shareIntent.putExtra(Intent.EXTRA_STREAM, apkURI);
             shareIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
             Intent chooserIntent = Intent.createChooser(shareIntent, null);
-            List<ResolveInfo> resInfoList = context.getPackageManager().queryIntentActivities(chooserIntent, PackageManager.MATCH_DEFAULT_ONLY);
+            List<ResolveInfo> resInfoList = context.getPackageManager().queryIntentActivities(
+                    chooserIntent, PackageManager.MATCH_DEFAULT_ONLY);
 
             for (ResolveInfo resolveInfo : resInfoList) {
                 String packageName = resolveInfo.activityInfo.packageName;
-                context.grantUriPermission(packageName, apkURI, Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION);
+                context.grantUriPermission(packageName, apkURI,
+                        Intent.FLAG_GRANT_WRITE_URI_PERMISSION
+                                | Intent.FLAG_GRANT_READ_URI_PERMISSION);
             }
             context.startActivity(chooserIntent);
             shareFile.deleteOnExit();

@@ -4,7 +4,7 @@ description: Plugin that allows Flutter apps to generate and print documents to
 homepage: https://github.com/DavBfr/dart_pdf/tree/master/printing
 repository: https://github.com/DavBfr/dart_pdf
 issue_tracker: https://github.com/DavBfr/dart_pdf/issues
-version: 3.6.2
+version: 3.6.3
 
 environment:
   sdk: ">=2.3.0 <3.0.0"