Android PopupWindow全屏

很多应用中经常可以看到弹出这种PopupWindow的效果，做了一个小demo分享一下。demo的思路是通过遍历文件，找到图片以及图片文件夹放置在PopupWindow上面。点击按钮可以弹出这个PopupWindow，这里为PopupWindow设置了动画。

PopupWindow全屏代码提要

受限需要自定义Popupwindow，这里不看Popupwindow里面要展示的内容，主要是设置Popupwindow的高度。

public class PopupwindowList extends PopupWindow { private int mWidth; private int mHeight; private View mContentView; private List<FileBean> mFileBeans; private ListView mListView; public PopupwindowList(Context context,List<FileBean> mFileBeans) { super(context); this.mFileBeans=mFileBeans; //计算宽度和高度 calWidthAndHeight(context); setWidth(mWidth); setHeight(mHeight); mContentView= LayoutInflater.from(context).inflate(R.layout.popupwidow,null); //设置布局与相关属性 setContentView(mContentView); setFocusable(true); setTouchable(true); setTouchable(true); setTouchInterceptor(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { //点击PopupWindow以外区域时PopupWindow消失 if (event.getAction() == MotionEvent.ACTION_OUTSIDE) { dismiss(); } return false; } }); } /** * 设置PopupWindow的大小 * @param context */ private void calWidthAndHeight(Context context) { WindowManager wm= (WindowManager) context.getSystemService(Context.WINDOW_SERVICE); DisplayMetrics metrics= new DisplayMetrics(); wm.getDefaultDisplay().getMetrics(metrics); mWidth=metrics.widthPixels; //设置高度为全屏高度的70% mHeight= (int) (metrics.heightPixels*0.7); }}

点击按钮弹出PopupWindow

mButtonShowPopup.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //点击时弹出PopupWindow，屏幕变暗 popupwindowList.setAnimationStyle(R.style.ListphotoSelect); popupwindowList.showAsDropDown(mButtonShowPopup, 0, 0); lightoff(); } }); private void lightoff() { WindowManager.LayoutParams lp=getWindow().getAttributes(); lp.alpha=0.3f; getWindow().setAttributes(lp); }

一、FileBean类保存信息

FileBean如上图PopupWindow所示，需要保存文件的路径，文件夹的名称，文件夹中文件的数量，文件夹中第一张图片的路径。基本全部为set、get方法

/** * this class is used to record file information like the name of the file 、the path of the file…… * */public class FileBean { private String mFileName; private String mFilePath; private String mFistImgPath; private int mPhotoCount; public String getmFileName() { return mFileName; } public void setmFileName(String mFileName) { this.mFileName = mFileName; } public String getmFilePath() { return mFilePath; } public void setmFilePath(String mFilePath) { this.mFilePath = mFilePath; int index=this.mFilePath.lastIndexOf(File.separator); mFileName=this.mFilePath.substring(index); } public String getmFistImgPath() { return mFistImgPath; } public void setmFistImgPath(String mFistImgPath) { this.mFistImgPath = mFistImgPath; } public int getmPhotoCount() { return mPhotoCount; } public void setmPhotoCount(int mPhotoCount) { this.mPhotoCount = mPhotoCount; }}

二、PopupWidow界面设置

自定义PopupWindow,

public class PopupwindowList extends PopupWindow { private int mWidth; private int mHeight; private View mContentView; private List<FileBean> mFileBeans; private ListView mListView; //观察者模式 public interface OnSeletedListener{ void onselected(FileBean bean); } private OnSeletedListener listener; public void setOnSelecterListener(OnSeletedListener listener){ this.listener=listener; } public PopupwindowList(Context context,List<FileBean> mFileBeans) { super(context); this.mFileBeans=mFileBeans; calWidthAndHeight(context); setWidth(mWidth); setHeight(mHeight); mContentView= LayoutInflater.from(context).inflate(R.layout.popupwidow,null); setContentView(mContentView); setFocusable(true); setTouchable(true); setTouchable(true); setTouchInterceptor(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { //点击PopupWindow以外区域时PopupWindow消失 if (event.getAction() == MotionEvent.ACTION_OUTSIDE) { dismiss(); } return false; } }); initListView(context); initEvent(); } private void initEvent() { } //初始化PopupWindow的listview private void initListView(Context context) { MyListViewAdapter adapter=new MyListViewAdapter(context,0,mFileBeans); mListView= (ListView) mContentView.findViewById(R.id.listview); mListView.setAdapter(adapter); } /** * 设置PopupWindow的大小 * @param context */ private void calWidthAndHeight(Context context) { WindowManager wm= (WindowManager) context.getSystemService(Context.WINDOW_SERVICE); DisplayMetrics metrics= new DisplayMetrics(); wm.getDefaultDisplay().getMetrics(metrics); mWidth=metrics.widthPixels; mHeight= (int) (metrics.heightPixels*0.7); }}

三、点击按钮弹出PopupWindow

public class PopupWindowTest extends AppCompatActivity { private Button mButtonShowPopup; private Set<String> mFilePath; private List<FileBean> mFileBeans; PopupwindowList popupwindowList; private Handler mHandler=new Handler(){ @Override public void handleMessage(Message msg) { super.handleMessage(msg); initPopupWindow(); } }; private void initPopupWindow() { popupwindowList=new PopupwindowList(this,mFileBeans); popupwindowList.setOnDismissListener(new PopupWindow.OnDismissListener() { @Override public void onDismiss() { lighton(); } }); } //PopupWindow消失时，使屏幕恢复正常 private void lighton() { WindowManager.LayoutParams lp=getWindow().getAttributes(); lp.alpha=1.0f; getWindow().setAttributes(lp); } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.popupwindowtestlayout); mButtonShowPopup= (Button) findViewById(R.id.button_showpopup); mFileBeans=new ArrayList<>(); initData(); initEvent(); } private void initEvent() { mButtonShowPopup.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //点击时弹出PopupWindow，屏幕变暗 popupwindowList.setAnimationStyle(R.style.ListphotoSelect); popupwindowList.showAsDropDown(mButtonShowPopup, 0, 0); lightoff(); } }); } private void lightoff() { WindowManager.LayoutParams lp=getWindow().getAttributes(); lp.alpha=0.3f; getWindow().setAttributes(lp); } //开启线程初始化数据，遍历文件找到所有图片文件，及其文件夹与路径进行保存。 private void initData() { if(!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){ ToastUtils.showToast(this,"当前sdcard不用使用"); } new Thread(){ @Override public void run() { super.run(); Uri imgsUri= MediaStore.Images.Media.EXTERNAL_CONTENT_URI; ContentResolver contentResolver=getContentResolver(); Cursor cursor=contentResolver.query(imgsUri,null,MediaStore.Images.Media.MIME_TYPE + "=? or " + MediaStore.Images.Media.MIME_TYPE + "=?",new String[]{"image/jpeg","image/png"},MediaStore.Images.Media.DATA); mFilePath=new HashSet<>(); while (cursor.moveToNext()){ String path=cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA)); File parentfile=new File(path).getParentFile(); if(parentfile==null) continue; String filePath=parentfile.getAbsolutePath(); FileBean fileBean=null; if(mFilePath.contains(filePath)){ continue; }else { mFilePath.add(filePath); fileBean=new FileBean(); fileBean.setmFilePath(filePath); fileBean.setmFistImgPath(path); } if(parentfile.list()==null) continue; int count=parentfile.list(new FilenameFilter() { @Override public boolean accept(File dir, String filename) { if(filename.endsWith(".jpg")||filename.endsWith(".png")||filename.endsWith(".jpeg")){ return true; } return false; } }).length; fileBean.setmPhotoCount(count); mFileBeans.add(fileBean); } cursor.close(); //将mFilePath置空，发送消息，初始化PopupWindow。 mFilePath=null; mHandler.sendEmptyMessage(0x110); } }.start(); }}

四、PopupWindow动画设置。

（1）编写弹出与消失动画

①弹出动画

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android"><translate android:fromXDelta="0" android:toXDelta="0" android:fromYDelta="100%" android:toYDelta="0" android:duration="1000"></translate></set>

②消失动画

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android"> <translate android:fromXDelta="0" android:toXDelta="0" android:fromYDelta="0" android:toYDelta="100%" android:duration="1000"></translate></set>

（2）设置style与调用style

①设置style

在style中进行添加

<resources> <!-- Base application theme. --> <style name="AppTheme" parent="Theme.AppCompat.Light"> <!-- Customize your theme here. --> </style> <style name="ListphotoSelect"> <item name="android:windowEnterAnimation">@anim/animshow</item> <item name="android:windowExitAnimation">@anim/animdismiss</item> </style></resources>

②调用style

为PopupWindow设置动画style

popupwindowList.setAnimationStyle(R.style.ListphotoSelect);

备注：布局很简单不再展示。

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