Android开发学习笔记之Dialog

是dialog成为系统级，点home键也不会消失，父activity销毁也不会消失，多用于系统升级

dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT)

<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>

Dialog的style例子

<style name="CustomTheme" parent="@android:style/Theme.Dialog"> 
        <item name="android:windowNoTitle">true</item>
  <item name="android:layout_width">wrap_content</item>
  <item name="android:layout_height">wrap_content</item>
  <item name="android:gravity">center</item>
  <item name="android:windowIsTranslucent">true</item>
  <item name="android:windowFrame">@null</item>
  <item name="android:windowBackground">@android:color/transparent</item>
  <item name="android:windowIsFloating">true</item>
  <item name="android:windowContentOverlay">@null</item>
  <item name="android:windowAnimationStyle">@android:style/Animation.Dialog</item>
  <item name="android:backgroundDimEnabled">true</item>
  <item name="android:background">@android:color/transparent</item>
  </style>

特制的Dialog，带动画、背景透明、位置任意

mDialog = new Dialog(context, R.style.ShareMenuDialog);
mDialog.setContentView(view);
mDialog.setCanceledOnTouchOutside(true);

Window window = mDialog.getWindow();     
window.setGravity(Gravity.BOTTOM);     //设置位于底部
window.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));   //设置背景为透明色
window.setWindowAnimations(R.style.ShareAnimation);       //设置动画

WindowManager.LayoutParams mParams = mDialog.getWindow().getAttributes();    //获取属性

WindowManager windowManager =(WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
Display display = windowManager.getDefaultDisplay();
mParams.width = (int) (display.getWidth() * 1.0);      //设置宽为屏幕宽度
        

mDialog.getWindow().setAttributes(mParams);        //设置属性
mDialog.show();

<resources>


    <!-- Application theme. -->
    <style name="AppTheme" parent="@android:style/Theme.Light.NoTitleBar">
        <!-- All customizations that are NOT specific to a particular API-level can go here. -->
    </style>

    <!-- 对话框样式-->
    <style name="ShareMenuDialog">
        <item name="android:windowFrame">@null</item>
        <item name="android:windowNoTitle">true</item>
        <item name="android:windowIsFloating">true</item>
        <item name="android:windowContentOverlay">@null</item>
        <item name="android:windowIsTranslucent">true</item>
        <item name="android:backgroundDimEnabled">true</item>
    </style>

    <!--对话框动画-->
    <style name="ShareAnimation" parent="android:Animation">
        <item name="android:windowEnterAnimation">@anim/kk_menu_in</item>
        <item name="android:windowExitAnimation">@anim/kk_menu_out</item>
    </style>


</resources>

/*  anim/kk_menu_in.xml   */

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/decelerate_interpolator" >


    <translate
        android:duration="500"
        android:fromYDelta="100%p"
        android:toYDelta="0" />


</set>

/* anim/kk_menu_out.xml */

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/accelerate_interpolator" >


    <translate
        android:duration="500"
        android:fromYDelta="0"
        android:toYDelta="100%p" />


</set>