1、一般情况下，系统默认的Dialog显示位置为屏幕居中：
pbDialog = new ProgressDialog(MainActivity.this);
pbDialog.setMessage("请稍等，加载中");
pbDialog.show();
2、设置Dialog显示位置在屏幕底部：
pbDialog = new ProgressDialog(MainActivity.this);
pbDialog.setMessage("请稍等，加载中");
WindowManager.LayoutParams params = pbDialog.getWindow().getAttributes();
pbDialog.getWindow().setGravity(Gravity.BOTTOM);
pbDialog.show();
3、设置Dialog显示位置在屏幕底部，并且距离底部100px:
pbDialog = new ProgressDialog(MainActivity.this);
pbDialog.setMessage("请稍等，加载中");
WindowManager.LayoutParams params = pbDialog.getWindow().getAttributes();
pbDialog.getWindow().setGravity(Gravity.BOTTOM);
params.y = 100;
pbDialog.getWindow().setAttributes(params);
pbDialog.show();
android--自定义ProgressDialog显示位置(其它Dialog子类都可以设置),布布扣,bubuko.com