自定义Dialog实现全屏和位置在屏幕底部

// 设置dialog宽度全屏
WindowManager windowManager = this.getWindow().getWindowManager();
Display display = windowManager.getDefaultDisplay();
WindowManager.LayoutParams lp = this.getWindow().getAttributes();
lp.width = (int) (display.getWidth()); // 设置宽度
this.getWindow().setAttributes(lp);
this.getWindow().getDecorView().setPadding(0, 0, 0, 0);// 默认Theme.Dialog还是存在padding的
this.getWindow().setGravity(Gravity.BOTTOM);
this.getWindow().setWindowAnimations(R.style.TimePickDialog);// 设置dialog显示动画