add ability to pass page size to android (#116)

* Update PdfConverter.java

update to use letter. need to use options passed

* add ability to pass page size to android

* missed closing parentheses

* added missing import

* fixed convert to bool

* forgot new for constructor

Author: snyderra

README.md

@@ -93,14 +93,14 @@ export default class Example extends Component {
 | `fileName` | `string` | Random  | Custom Filename excluding .pdf extension
 | `base64` | `boolean` | false  | return base64 string of pdf file (not recommended)
 | `directory` | `string` |default cache directory| Directory where the file will be created (`Documents` folder in example above). Please note, on iOS `Documents` is the only custom value that is accepted.
+| `height` | number | 792  | Set document height (points)
+| `width` | number | 612  | Set document width (points)
 
 
 #### iOS Only
 
 | Param | Type | Default | Note |
 |---|---|---|---|
-| `height` | number | 792  | Set document height (points)
-| `width` | number | 612  | Set document width (points)
 | `paddingLeft` | number | 10  | Outer left padding (points)
 | `paddingRight` | number | 10  | Outer right padding (points)
 | `paddingTop` | number | 10  | Outer top padding (points)

android/src/main/java/android/print/PdfConverter.java

@@ -144,7 +144,7 @@ private PrintAttributes getDefaultPrintAttrs() {
         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) return null;
 
         return new PrintAttributes.Builder()
-                .setMediaSize(PrintAttributes.MediaSize.ISO_A4)
+                .setMediaSize(PrintAttributes.MediaSize.NA_LETTER)
                 .setResolution(new PrintAttributes.Resolution("RESOLUTION_ID", "RESOLUTION_ID", 600, 600))
                 .setMinMargins(PrintAttributes.Margins.NO_MARGINS)
                 .build();

android/src/main/java/com/christopherdro/htmltopdf/RNHTMLtoPDFModule.java

@@ -14,6 +14,7 @@
 
 import android.os.Environment;
 import android.print.PdfConverter;
+import android.print.PrintAttributes;
 
 public class RNHTMLtoPDFModule extends ReactContextBaseJavaModule {
 
@@ -22,6 +23,8 @@ public class RNHTMLtoPDFModule extends ReactContextBaseJavaModule {
     private static final String DIRECTORY = "directory";
     private static final String BASE_64 = "base64";
     private static final String BASE_URL = "baseURL";
+    private static final String HEIGHT = "height";
+    private static final String WIDTH = "width";
 
     private static final String PDF_EXTENSION = ".pdf";
     private static final String PDF_PREFIX = "PDF_";
@@ -76,20 +79,36 @@ public void convert(final ReadableMap options, final Promise promise) {
         destinationFile = getTempFile(fileName);
       }
 
+      PrintAttributes pagesize=null;
+      if(options.hasKey(HEIGHT) && options.hasKey(WIDTH)) {
+        pagesize=new PrintAttributes.Builder()
+                .setMediaSize(new PrintAttributes.MediaSize("custom","CUSTOM",
+                        (int)(options.getInt(WIDTH)*1000/72.0),
+                        (int)(options.getInt(HEIGHT)*1000/72.0))
+                )
+                .setResolution(new PrintAttributes.Resolution("RESOLUTION_ID", "RESOLUTION_ID", 600, 600))
+                .setMinMargins(PrintAttributes.Margins.NO_MARGINS)
+                .build();
+      }
+
       convertToPDF(htmlString,
               destinationFile,
               options.hasKey(BASE_64) && options.getBoolean(BASE_64),
               Arguments.createMap(),
               promise,
-              options.hasKey(BASE_URL) ? options.getString(BASE_URL) : null);
+              options.hasKey(BASE_URL) ? options.getString(BASE_URL) : null,
+              pagesize
+              );
     } catch (Exception e) {
       promise.reject(e);
     }
   }
 
   private void convertToPDF(String htmlString, File file, boolean shouldEncode, WritableMap resultMap, Promise promise,
-      String baseURL) throws Exception {
-      PdfConverter.getInstance().convert(mReactContext, htmlString, file, shouldEncode, resultMap, promise, baseURL);
+      String baseURL,PrintAttributes printAttributes) throws Exception {
+      PdfConverter pdfConverter=PdfConverter.getInstance();
+      if(printAttributes!=null) pdfConverter.setPdfPrintAttrs(printAttributes);
+      pdfConverter.convert(mReactContext, htmlString, file, shouldEncode, resultMap, promise, baseURL);
   }
 
   private File getTempFile(String fileName) throws IOException {