java: add keyboard handling button and button for opening console on screen

app/src/main/java/org/etlegacy/app/ETLActivity.java

@@ -1,12 +1,77 @@
 package org.etlegacy.app;
 
+import android.content.Context;
+import android.content.res.AssetManager;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.os.Bundle;
+import android.view.View;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.Button;
+import android.widget.ImageButton;
+import android.widget.RelativeLayout;
+
 import org.libsdl.app.SDLActivity;
 
+import java.io.IOException;
+import java.io.InputStream;
+
 public class ETLActivity extends SDLActivity
 {
+    private Bitmap getBitmapFromAsset(String strName)
+    {
+        AssetManager assetManager = getAssets();
+        InputStream istr = null;
+        try {
+            istr = assetManager.open(strName);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        Bitmap bitmap = BitmapFactory.decodeStream(istr);
+        Bitmap resized = Bitmap.createScaledBitmap(bitmap, 80, 80, true);
+        return resized;
+    }
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        Button btn = new Button(getApplicationContext());
+        btn.setText("Keyboard");
+        btn.setId(1);
+        btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+                imm.toggleSoftInput(InputMethodManager.SHOW_FORCED,0);
+            }
+        });
+
+        mLayout.addView(btn);
+
+        ImageButton btn2 = new ImageButton(getApplicationContext());
+        btn2.setImageBitmap(getBitmapFromAsset("btn_keyboard.png"));
+        btn2.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                SDLActivity.onNativeKeyDown(68);
+            }
+        });
+
+        RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(
+                RelativeLayout.LayoutParams.WRAP_CONTENT,
+                RelativeLayout.LayoutParams.WRAP_CONTENT);
+
+        lp.addRule(RelativeLayout.ALIGN_PARENT_RIGHT, btn.getId());
+
+        mLayout.addView(btn2, lp);
+
+    }
+
     @Override
     protected String[] getLibraries() {
         return new String[] {
+                "SDL2",
                 "etl"
         };
     }