Add extend example for Android

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@13831 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/android/extend/src/org/swig/extendexample/SwigExtend.java

@@ -0,0 +1,108 @@
+package org.swig.extendexample;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+import android.widget.ScrollView;
+import android.text.method.ScrollingMovementMethod;
+
+public class SwigExtend extends Activity
+{
+    TextView outputText = null;
+    ScrollView scroller = null;
+
+    /** Called when the activity is first created. */
+    @Override
+    public void onCreate(Bundle savedInstanceState)
+    {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.main);
+
+        outputText = (TextView)findViewById(R.id.OutputText);
+        outputText.setText("Press 'Run' to start...\n");
+        outputText.setMovementMethod(new ScrollingMovementMethod());
+
+        scroller = (ScrollView)findViewById(R.id.Scroller);
+    }
+
+    public void onRunButtonClick(View view)
+    {
+      outputText.append("Started...\n");
+      nativeCall();
+      outputText.append("Finished!\n");
+      
+      // Ensure scroll to end of text
+      scroller.post(new Runnable() {
+        public void run() {
+          scroller.fullScroll(ScrollView.FOCUS_DOWN);
+        }
+      });
+    }
+
+    /** Calls into C/C++ code */
+    public void nativeCall()
+    {
+      /*
+      // ----- Object creation -----
+
+      outputText.append( "Creating some objects:\n" );
+      Circle c = new Circle(10);
+      outputText.append( "    Created circle " + c + "\n");
+      Square s = new Square(10);
+      outputText.append( "    Created square " + s + "\n");
+
+      // ----- Access a static member -----
+
+      outputText.append( "\nA total of " + Shape.getNshapes() + " shapes were created\n" );
+
+      // ----- Member data access -----
+
+      // Notice how we can do this using functions specific to
+      // the 'Circle' class.
+      c.setX(20);
+      c.setY(30);
+
+      // Now use the same functions in the base class
+      Shape shape = s;
+      shape.setX(-10);
+      shape.setY(5);
+
+      outputText.append( "\nHere is their current position:\n" );
+      outputText.append( "    Circle = (" + c.getX() + " " + c.getY() + ")\n" );
+      outputText.append( "    Square = (" + s.getX() + " " + s.getY() + ")\n" );
+
+      // ----- Call some methods -----
+
+      outputText.append( "\nHere are some properties of the shapes:\n" );
+      Shape[] shapes = {c,s};
+      for (int i=0; i<shapes.length; i++)
+      {
+        outputText.append( "   " + shapes[i].toString() + "\n" );
+        outputText.append( "        area      = " + shapes[i].area() + "\n" );
+        outputText.append( "        perimeter = " + shapes[i].perimeter() + "\n" );
+      }
+
+      // Notice how the area() and perimeter() functions really
+      // invoke the appropriate virtual method on each object.
+
+      // ----- Delete everything -----
+
+      outputText.append( "\nGuess I'll clean up now\n" );
+
+      // Note: this invokes the virtual destructor
+      // You could leave this to the garbage collector
+      c.delete();
+      s.delete();
+
+      outputText.append( Shape.getNshapes() + " shapes remain\n" );
+      outputText.append( "Goodbye\n" );
+      */
+    }
+
+    /** static constructor */
+    static {
+        System.loadLibrary("example");
+    }
+}