Allow building for Android SDK 16

@@ -3,6 +3,7 @@
 ## 3.5.0
 ## 3.5.0
 
 
 - Add decoration options to the PdfPreview Widget [Marcos Rodriguez]
 - Add decoration options to the PdfPreview Widget [Marcos Rodriguez]
+- Allow building for Android SDK 16
 
 
 ## 3.4.0
 ## 3.4.0
 
 

@@ -25,7 +25,7 @@ android {
     compileSdkVersion 28
     compileSdkVersion 28
 
 
     defaultConfig {
     defaultConfig {
-        minSdkVersion 19
+        minSdkVersion 16
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
     }
     lintOptions {
     lintOptions {

@@ -14,7 +14,7 @@ public class PrintingHandler implements MethodChannel.MethodCallHandler {
     private final Activity activity;
     private final Activity activity;
     private final MethodChannel channel;
     private final MethodChannel channel;
 
 
-    public PrintingHandler(@NonNull Activity activity, @NonNull MethodChannel channel) {
+    PrintingHandler(@NonNull Activity activity, @NonNull MethodChannel channel) {
         this.activity = activity;
         this.activity = activity;
         this.channel = channel;
         this.channel = channel;
     }
     }
@@ -34,8 +34,7 @@ public class PrintingHandler implements MethodChannel.MethodCallHandler {
                 final PrintingJob printJob =
                 final PrintingJob printJob =
                         new PrintingJob(activity, this, (int) call.argument("job"));
                         new PrintingJob(activity, this, (int) call.argument("job"));
                 assert name != null;
                 assert name != null;
-                printJob.printPdf(
-                        name, width, height, marginLeft, marginTop, marginRight, marginBottom);
+                printJob.printPdf(name);
 
 
                 result.success(1);
                 result.success(1);
                 break;
                 break;

@@ -73,13 +73,16 @@ public class PrintingJob extends PrintDocumentAdapter {
     }
     }
 
 
     static HashMap<String, Object> printingInfo() {
     static HashMap<String, Object> printingInfo() {
+        final boolean canPrint = android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
+        final boolean canRaster = Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP;
+
         HashMap<String, Object> result = new HashMap<>();
         HashMap<String, Object> result = new HashMap<>();
         result.put("directPrint", false);
         result.put("directPrint", false);
-        result.put("dynamicLayout", true);
-        result.put("canPrint", true);
-        result.put("canConvertHtml", true);
+        result.put("dynamicLayout", canPrint);
+        result.put("canPrint", canPrint);
+        result.put("canConvertHtml", canRaster);
         result.put("canShare", true);
         result.put("canShare", true);
-        result.put("canRaster", true);
+        result.put("canRaster", canRaster);
         return result;
         return result;
     }
     }
 
 
@@ -181,8 +184,7 @@ public class PrintingJob extends PrintDocumentAdapter {
         thread.start();
         thread.start();
     }
     }
 
 
-    void printPdf(@NonNull String name, Double width, Double height, Double marginLeft,
-            Double marginTop, Double marginRight, Double marginBottom) {
+    void printPdf(@NonNull String name) {
         jobName = name;
         jobName = name;
         printJob = printManager.print(name, this, null);
         printJob = printManager.print(name, this, null);
     }
     }

@@ -17,22 +17,14 @@
 package net.nfet.flutter.printing;
 package net.nfet.flutter.printing;
 
 
 import android.app.Activity;
 import android.app.Activity;
-import android.content.Context;
-import android.print.PrintAttributes;
 
 
 import androidx.annotation.NonNull;
 import androidx.annotation.NonNull;
 
 
-import java.util.HashMap;
-
 import io.flutter.embedding.engine.plugins.FlutterPlugin;
 import io.flutter.embedding.engine.plugins.FlutterPlugin;
 import io.flutter.embedding.engine.plugins.activity.ActivityAware;
 import io.flutter.embedding.engine.plugins.activity.ActivityAware;
 import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding;
 import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding;
 import io.flutter.plugin.common.BinaryMessenger;
 import io.flutter.plugin.common.BinaryMessenger;
-import io.flutter.plugin.common.EventChannel;
-import io.flutter.plugin.common.MethodCall;
 import io.flutter.plugin.common.MethodChannel;
 import io.flutter.plugin.common.MethodChannel;
-import io.flutter.plugin.common.MethodChannel.MethodCallHandler;
-import io.flutter.plugin.common.MethodChannel.Result;
 import io.flutter.plugin.common.PluginRegistry.Registrar;
 import io.flutter.plugin.common.PluginRegistry.Registrar;
 
 
 /**
 /**
@@ -73,7 +65,7 @@ public class PrintingPlugin implements FlutterPlugin, ActivityAware {
     }
     }
 
 
     @Override
     @Override
-    public void onDetachedFromEngine(FlutterPluginBinding binding) {
+    public void onDetachedFromEngine(@NonNull FlutterPluginBinding binding) {
         channel.setMethodCallHandler(null);
         channel.setMethodCallHandler(null);
         channel = null;
         channel = null;
         handler = null;
         handler = null;