Android笔记（2）popwindow

1.建立anim动画文件 (1)建立popshow_anim.xml文件(popwindow显示动画)

<?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android"> <translate android:duration="500" android:fromYDelta="100%p" android:toYDelta="0" /> <alpha android:duration="500" android:fromAlpha="0.0" android:toAlpha="1.0" /> </set>

(2)建立pophidden_anim.xml文件(popwindow退出动画)

<?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android"> <translate android:duration="500" android:fromYDelta="0" android:toYDelta="50%p" /> <alpha android:duration="500" android:fromAlpha="1.0" android:toAlpha="0.0" /> </set>

2.布局文件pop.xml(此处写弹出的内容)

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> </LinearLayout>

3.Activity文件

public class Activity extends AppCompatActivity { private View contentView; private PopupWindow popupWindow; protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //初始化 showPopwindow(); //将背景透明化 WindowManager.LayoutParams params=GoodsDetail.this.getWindow().getAttributes(); params.alpha=0.5f; GoodsDetail.this.getWindow().setAttributes(params); //弹出 popupWindow.showAtLocation(contentView, Gravity.BOTTOM, 0, 0); //退出 if (popupWindow != null && popupWindow.isShowing()) { popupWindow.dismiss(); WindowManager.LayoutParams params=getActivity().getWindow().getAttributes(); params.alpha=1f; getActivity().getWindow().setAttributes(params); } } private void showPopwindow() { contentView = LayoutInflater.from(GoodsDetail.this).inflate( R.layout.pop, null); //此处使用contentView.findViewById找pop.xml中控件 popupWindow = new PopupWindow(contentView, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT); popupWindow.setFocusable(true);// 取得焦点 //注意 要是点击外部空白处弹框消息 那么必须给弹框设置一个背景色 不然是不起作用的 popupWindow.setBackgroundDrawable(new BitmapDrawable()); //点击外部消失 popupWindow.setOutsideTouchable(true); //设置可以点击 popupWindow.setTouchable(true); //进入退出的动画 popupWindow.setAnimationStyle(R.style.mypopwindow_anim_style); //popupWindow隐藏时恢复屏幕正常透明度 popupWindow.setOnDismissListener(new PopupWindow.OnDismissListener() { @Override public void onDismiss() { WindowManager.LayoutParams params=GoodsDetail.this.getWindow().getAttributes(); params.alpha=1f; GoodsDetail.this.getWindow().setAttributes(params); } }); } }

4.在style中

<style name="mypopwindow_anim_style"> <item name="android:windowEnterAnimation">@anim/popshow_anim</item> <!-- 指定显示的动画xml --> <item name="android:windowExitAnimation">@anim/pophidden_anim</item> <!-- 指定消失的动画xml --> </style>