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。