1. 设置Dialog在窗口底部,且宽度最大。
Window window = getDialog().getWindow(); WindowManager.LayoutParams layoutParams = window.getAttributes(); layoutParams.gravity = Gravity.BOTTOM; layoutParams.width = WindowManager.LayoutParams.MATCH_PARENT; window.setAttributes(layoutParams);
或 使用Dialog可类似处理,进行屏幕位置的设置。
Window window = getDialog().getWindow(); WindowManager.LayoutParams layoutParams = window.getAttributes(); layoutParams.gravity = Gravity.CENTER; //居中显示 window.setAttributes(layoutParams);
设置对话框外部背景
getDialog().getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT)); //去掉背景色
设置主题
getDialog().requestWindowFeature(Window.FEATURE_NO_TITLE);
实例:
public class WifiListDialog extends DialogFragment { private Context mContext; @Override public void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); mContext = getActivity(); } @Override public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_wifi_dialog, null); getDialog().requestWindowFeature(Window.FEATURE_NO_TITLE); getDialog().getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT)); //去掉背景色(一些设备上由于系统主题原因会有背景边框) Window window = getDialog().getWindow(); WindowManager.LayoutParams layoutParams = window.getAttributes(); layoutParams.gravity = Gravity.BOTTOM; layoutParams.width = WindowManager.LayoutParams.MATCH_PARENT; window.setAttributes(layoutParams); initView(view); return view; } ... }
2. Activity也可作为Dialog使用,使用Activity作为对话框使用时,若希望宽度占满屏幕,则需要进行如下设置:
设置Activity主题(以Dialog风格显示):
<style name="ActivityDialog" parent="Theme.AppCompat.Dialog"> <item name="android:windowNoTitle">true</item> <item name="android:windowBackground">@null</item> //必须设置该属性为空,才能占满屏幕,否则会有边界空白 </style>
<activity android:name=".module.homepage.ActivitySelectDevice" android:theme="@style/ActivityDialog" android:launchMode="singleTop"/>
在Activity的oncreate()方法中设置宽度占满屏(同理,可设置宽度具体大小)
public class ActivitySelectDevice extends Activity { @Override public void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_xxx); Display display = getWindowManager().getDefaultDisplay(); WindowManager.LayoutParams layoutParams = getWindow().getAttributes(); layoutParams.width = display.getWidth(); getWindow().setAttributes(layoutParams); } }
或 (这两种方式实际是一样的)
DisplayMetrics dm = new DisplayMetrics(); getWindowManager().getDefaultDisplay().getMetrics(dm); getWindow().setLayout(dm.widthPixels, getWindow().getAttributes().height);
注意:如果只是设置了布局宽度,而没有将 android:windowBackground 属性置为 null,那么对话框宽度不能占满屏,会有边界区域。
3. 设置Dialog的大小(宽高)
public class AppDialog extends Dialog { public AppDialog(Context context) { super(context, R.style.dialogTheme); View view = LayoutInflater.from(context).inflate(R.layout.dialog_xxx, null); setContentView(view); WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE); Display display = wm.getDefaultDisplay(); //获取屏幕宽高 Point point = new Point(); display.getSize(point); Window window = getWindow(); WindowManager.LayoutParams layoutParams = window.getAttributes(); //获取当前对话框的参数值 layoutParams.width = (int) (point.x * 0.5); //宽度设置为屏幕宽度的0.5 layoutParams.height = (int) (point.y * 0.5); //高度设置为屏幕高度的0.5 // layoutParams.width = (int) (display.getWidth() * 0.5); // layoutParams.height = (int) (display.getHeight() * 0.5); window.setAttributes(layoutParams); } }