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Android PopupWindow Android PopupWindow全屏仔细讲解及实例代码

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 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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