1 /** 2 * 获取父控件的位置y-popwindow的高度 = 应该显示的y坐标. x这里设置为center 不刻意指定坐标 注意:控件坐标永远是 左上角坐标! 3 * 4 * @param parent 5 */ 6 public void showUp(View parent) { 7 8 int[] location = new int[2]; 9 10 parent.getLocationOnScreen(location); 11 popupWindow.setAnimationStyle(R.style.AnimationPopup); 12 popupWindow.showAtLocation(parent, Gravity.CENTER_HORIZONTAL 13 | Gravity.TOP, 0, location[1] - popupWindow.getHeight() + 20); 14 15 popupWindow.setFocusable(true); 16 popupWindow.setOutsideTouchable(true); 17 18 popupWindow.update(); 19 }
values\style.xml:
1 <resources> 2 <style name="AnimationPopup"> 3 <item name="@android:windowEnterAnimation">@anim/appear</item> 4 <item name="@android:windowExitAnimation">@anim/disappear</item> 5 </style> 6 </resources>
anim\appear.xml
1 <?xml version="1.0" encoding="utf-8"?> 2 <set xmlns:android="http://schemas.android.com/apk/res/android" > 3 4 5 <scale 6 android:duration="500" 7 android:fromXScale="1.0" 8 android:fromYScale="0.5" 9 android:pivotX="0%" 10 android:pivotY="100%" 11 android:toXScale="1" 12 android:toYScale="1" /> 13 14 15 <alpha 16 android:duration="500" 17 android:fromAlpha="0.5" 18 android:interpolator="@android:anim/accelerate_interpolator" 19 android:toAlpha="1.0" /> 20 21 22 </set>
anim\disappear.xml
1 <?xml version="1.0" encoding="utf-8"?> 2 <set xmlns:android="http://schemas.android.com/apk/res/android" > 3 4 5 <scale 6 android:duration="500" 7 android:fromXScale="1.0" 8 android:fromYScale="1" 9 android:pivotX="0%" 10 android:pivotY="100%" 11 android:toXScale="1" 12 android:toYScale="0.5" /> 13 14 15 <alpha 16 android:duration="500" 17 android:fromAlpha="1.0" 18 android:interpolator="@android:anim/accelerate_interpolator" 19 android:toAlpha="0.0" /> 20 21 22 </set>