自定义dialog布局

public Dialog createDialog(Context context) {
        dialog = new Dialog(context, R.style.Theme_DataSheet);
        inflater = LayoutInflater.from(context);

        view = inflater.inflate(R.layout.dialog_picture_select, null);
        view.findViewById(R.id.tv_1).setOnClickListener(this);
        view.findViewById(R.id.tv_2).setOnClickListener(this);

        Window window = dialog.getWindow();
//        window.getDecorView().setPadding(0, 0, 0, 0);
        WindowManager.LayoutParams lp = window.getAttributes();
//        lp.width = WindowManager.LayoutParams.MATCH_PARENT;
//        lp.height = WindowManager.LayoutParams.WRAP_CONTENT;
        lp.dimAmount = 0.2f;
        lp.gravity = Gravity.BOTTOM;
        dialog.onWindowAttributesChanged(lp);

        dialog.setCanceledOnTouchOutside(true);
        dialog.setContentView(view);

        return dialog;
    }