Templates

Standard-GUI

var GUI;

var activity = com.mojang.minecraftpe.MainActivity.currentMainActivity.get();

function newLevel(){
activity.runOnUiThread(new java.lang.Runnable({ run: function(){
        try{
            var layout = new android.widget.LinearLayout(activity);
            layout.setOrientation(1);
GUI = new android.widget.PopupWindow();

            var button = new android.widget.Button(activity);
            button.setText("Button");
            button.setOnClickListener(new android.view.View.OnClickListener({
                onClick: function(viewarg){
                    //Your Code
                }
            }));
            layout.addView(button);

            GUI.setBackgroundDrawable(new android.graphics.drawable.ColorDrawable(android.graphics.Color.TRANSPARENT));
            GUI.showAtLocation(activity.getWindow().getDecorView(), android.view.Gravity.RIGHT | android.view.Gravity.TOP, 0, 0);
        }catch(err){
            print("An error occured: " + err);
        }
    }}));
}

function leaveGame(){
    activity.runOnUiThread(new java.lang.Runnable({ run: function(){
        if(GUI != null){
            GUI.dismiss();
            GUI = null;
        }
    }}));
}