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 mFileBeans;
private ListView mListView;
public PopupwindowList(Context context,List 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 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 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 mFilePath;
private List 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
②消失动画
（2）设置style与调用style
①设置style
在style中进行添加
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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