small improvements

app/src/main/java/com/erz/joystick/MainActivity.java

@@ -15,13 +15,16 @@ public class MainActivity extends AppCompatActivity implements JoyStick.JoyStick
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         gameView = (GameView) findViewById(R.id.game);
-        ((JoyStick)findViewById(R.id.joy1)).setListener(this);
-        ((JoyStick)findViewById(R.id.joy1)).setPadColor(Color.parseColor("#55ffffff"));
-        ((JoyStick)findViewById(R.id.joy1)).setButtonColor(Color.parseColor("#55ff0000"));
-        ((JoyStick)findViewById(R.id.joy2)).setListener(this);
-        ((JoyStick)findViewById(R.id.joy2)).enableStayPut(true);
-        ((JoyStick)findViewById(R.id.joy2)).setButtonSize(50);
-        ((JoyStick)findViewById(R.id.joy2)).setButtonDrawable(R.drawable.droid);
+        JoyStick joy1 = (JoyStick) findViewById(R.id.joy1);
+        joy1.setListener(this);
+        joy1.setPadColor(Color.parseColor("#55ffffff"));
+        joy1.setButtonColor(Color.parseColor("#55ff0000"));
+
+        JoyStick joy2 = (JoyStick) findViewById(R.id.joy2);
+        joy2.setListener(this);
+        joy2.enableStayPut(true);
+        joy2.setPadBackground(R.drawable.pad);
+        joy2.setButtonDrawable(R.drawable.button);
     }
 
     @Override

joysticklibrary/src/main/java/com/erz/joysticklibrary/JoyStick.java

@@ -137,7 +137,7 @@ public class JoyStick extends View {
             paint.setColor(padColor);
             canvas.drawCircle(centerX, centerY, radius, paint);
         } else {
-            temp.set(posX - radius, posY - radius, posX + radius, posY + radius);
+            temp.set(centerX - radius, centerY - radius, centerX + radius, centerY + radius);
             canvas.drawBitmap(padBGBitmap, null, temp, paint);
         }
         if (buttonBitmap == null) {
@@ -219,8 +219,8 @@ public class JoyStick extends View {
 
     //size of button is a percentage of the minimum(width, height)
     //percentage must be between 25 - 50
-    public void setButtonSize(int p) {
-        percentage = p;
+    public void setButtonRadiusScale(int scale) {
+        percentage = scale;
         if (percentage > 50) percentage = 50;
         if (percentage < 25) percentage = 25;
     }