webview bên trong listview: Chạm vào xung đột sự kiện Do đó không thể pinch Phóng to/OUT trong android

Question

Tôi có một tùy chỉnh listview được lấp đầy với webview. Tôi muốn sử dụng chế độ phóng to thu nhỏ/Thu nhỏ cho webview của tôi. Nhưng tôi không nhận được sự phóng to/thu nhỏ một cách linh hoạt khi tôi véo webview nó đang kích hoạt di chuyển lên và xuống listview's.

làm cách nào tôi có thể xử lý sự kiện LÊN/XUỐNG cuộn cho listview và chụm đồng thời webview.

ở đây là tôi listview_layout.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
android:layout_width="match_parent" 
android:layout_height="match_parent" > 

ListView 
    android:id="@+id/listReader" 
    android:layout_width="match_parent" 
    android:layout_height="fill_parent" 
    android:layout_below="@+id/readerHeader" 
    android:divider="@android:color/background_dark" 
    android:dividerHeight="5dp" > 
</ListView> 

ở đây là tôi webview_layour.xml

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

<WebView 
    android:id="@+id/webView1" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:layout_alignParentTop="true" 
    android:layout_centerHorizontal="true" 
    android:clickable="true" 
    android:focusable="false" 
    android:focusableInTouchMode="false" 
    android:scrollbars="none" /> 
</RelativeLayout> 

và đây là tôi java file

public class WebViewBookReader extends Activity { 
static final String URL = "http://www.XXXXXXXX.com/requesthandler.ashx"; 
static final String KEY_ITEM_LOGIN = "Result"; // parent node 
static final String KEY_STATUS = "Status"; 
static final String KEY_CUSTOMERID = "CustomerID"; 
static final String KEY_FNAME = "FirstName"; 

ArrayList<String> URLs = null; 
Activity act = this; 
LayoutInflater inflater = null; 
Context context = WebViewBookReader.this; 

InputMethodManager imm; 
SharedPreferences presForLastLogin; 
ImageAdapter adapter; 

/** Called when the activity is first created. */ 
@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.book_reader_layout); 

    imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE); 
    getInfo = getIntent(); 

    URLs = new ArrayList<String>(); 
    listView = (ListView) findViewById(R.id.listReader); 

    cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); 



@Override 
protected void onStart() { 

    super.onStart(); 


    if (cm.getActiveNetworkInfo() != null 
      && cm.getActiveNetworkInfo().isAvailable() 
      && cm.getActiveNetworkInfo().isConnected()) { 

     new LoadBookPages().execute(""); 
    } else { 
     Toast.makeText(
       context, 
       "Connectivity Error..!\nNo any active Internet Connection Found.", 
       Toast.LENGTH_LONG).show(); 
    } 

} 

public class ImageAdapter extends BaseAdapter { 

    public ImageAdapter(Context c) { 
     context = c; 
    } 

    // ---returns the number of images--- 
    public int getCount() { 
     return URLs.size(); 

    } 

    public ImageAdapter(Context ctx, Activity act) { 
     inflater = (LayoutInflater) act 
       .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    } 

    // ---returns the ID of an item--- 
    public Object getItem(int position) { 
     return position; 
    } 

    public long getItemId(int position) { 
     return position; 
    } 

    // ---returns an ImageView view--- 
    public View getView(final int position, View convertView, 
      ViewGroup parent) { 

     // ImageView bmImage; 

     View vi = convertView; 
     if (convertView == null) { 
      vi = inflater.inflate(R.layout.book_reader_list_style, parent, 
        false); 
      holder = new ViewHolder(); 

      holder.webView = (WebView) vi.findViewById(R.id.webView1); 

      // holder.webView.setInitialScale(scaleWebView); 
      WebSettings webSettings = holder.webView.getSettings(); 
      holder.webView.setVerticalScrollBarEnabled(false); 
      holder.webView.setHorizontalScrollBarEnabled(false); 
      holder.webView.setVisibility(View.VISIBLE); 
      webSettings.setLoadWithOverviewMode(true); 
      webSettings.setUseWideViewPort(false); 

      webSettings.setBuiltInZoomControls(true); 
      webSettings.setSupportZoom(true); 
      webSettings.setLoadWithOverviewMode(true); 

      holder.webView.setOnClickListener(new OnClickListener() { 

       @Override 
       public void onClick(View v) { 
        Log.i("Webview", "Clicked"); 

       } 
      }); 

      vi.setTag(holder); 
     } else { 

      holder = (ViewHolder) vi.getTag(); 
     } 

     holder.webView 
       .loadDataWithBaseURL(
         null, 
         "<!DOCTYPE html><html><body style = \"text-align:center\"><img style=\"border-style:dotted;border-width:5px;border-color:black;\" src= " 
           + URLs.get(position) 
           + " alt=\"page Not Found\"></body></html>", 
         "text/html", "UTF-8", null); 

     return vi; 

    } 
} 

class ViewHolder { 
    WebView webView; 
    ImageButton btnZoomIn; 
    ImageButton btnZoomOut; 

} 

class LoadBookPages extends AsyncTask<String, Integer, String> { 
    ImageAdapter adapter = new ImageAdapter(context, act); 
    ProgressDialog progressDialog; 

    @Override 
    protected void onPreExecute() { 
     super.onPreExecute(); 
     progressDialog = ProgressDialog.show(context, "Loading Book...", 
       "Please Wait..."); 
    } 

    @Override 
    protected String doInBackground(String... params) { 

     for (int i = 1; i <= bookPageCount; i++) { 
      URLs.add(bookLink + i + ".jpg"); 
      publishProgress(i); 

     } 

     return null; 
    } 

    @Override 
    protected void onProgressUpdate(Integer... values) { 

     super.onProgressUpdate(values); 

     progressDialog.setMessage(values[0] 
       + " Page(s) Loaded \nPlease wait..."); 

    } 

    @Override 
    protected void onPostExecute(String result) { 

     super.onPostExecute(result); 
     Toast.makeText(context, "Page No. " + pageNo, Toast.LENGTH_SHORT) 
       .show(); 
     listView.setAdapter(adapter); 
     listView.requestFocus(); 
     progressDialog.dismiss(); 
     listView.setSelection(pageNo - 1); 
    } 

} 

private class UIThread_BookMark extends AsyncTask<String, Integer, String> { 

    ProgressDialog progressDialog; 

    @Override 
    protected void onPreExecute() { 
     super.onPreExecute(); 

     progressDialog = ProgressDialog.show(context, "BookMarking...", 
       "Please Wait..."); 
    } 

    @Override 
    protected String doInBackground(String... params) { 

     String URL = params[0]; 

     XMLParser parser = new XMLParser(); 

     String XMLString = parser.getXmlFromUrl_BookMark(URL, 
       Home.CustomerID, Integer.valueOf(bookID), pageNo); 
     Document doc = parser.getDomElement(XMLString); 
     NodeList nl = doc.getElementsByTagName(KEY_ITEM_LOGIN); 
     Element e = (Element) nl.item(0); 

     loginStatus = parser.getValue(e, KEY_STATUS); 

     if (loginStatus.equals("OK")) { 

      publishProgress(1); 

     } else { 

      publishProgress(0); 
     } 
     return null; 
    } 

    @Override 
    protected void onProgressUpdate(Integer... values) { 
     super.onProgressUpdate(values); 
     if (values[0] == 1) { 

      Toast.makeText(context, "BookMark Successful", 
        Toast.LENGTH_SHORT).show(); 

      if (getInfo.getStringExtra("CHECK_FOR_NOWREADING") 
        .equals("YES")) { 
       NowReading.pageNoReadingNow.set(
         getInfo.getIntExtra("BOOK_NO_INLIST", pageNo), 
         pageNo + ""); 
       Toast.makeText(context, "BookMark Updated", 
         Toast.LENGTH_SHORT).show(); 
       BookOverView.updatePageFlag = true; 
       BookOverView.tempPageNo = pageNo + ""; 
      } else { 
       NowReading.BookTitle = null; 
       NowReading.BookRating = null; 
       NowReading.BookDescription = null; 
       NowReading.BookCoverPhotos = null; 
       NowReading.BookAuther = null; 
       NowReading.BookPublishDate = null; 
       NowReading.BookCode = null; 
       NowReading.BookID = null; 
       NowReading.BookPageCount = null; 
       NowReading.bitmapArray = null; 
       NowReading.pageNoReadingNow = null; 
       BookOverView.updatePageFlag = false; 
      } 

     } else if (values[0] == 0) { 
      Toast.makeText(context, "Already BookMarked.", 
        Toast.LENGTH_LONG).show(); 
     } 
    } 

    @Override 
    protected void onPostExecute(String result) { 
     super.onPostExecute(result); 
     progressDialog.dismiss(); 
    } 
} 
} 

Answer 1

bạn cần phải thực hiện setOnTouchListener nghe trên WebView và viết bản Tuyên Bố này bên onTouch()

webView.setOnTouchListener(new View.OnTouchListener() { 

    @Override 
    public boolean onTouch(View v, MotionEvent event) {      

     if(event.getAction()==MotionEvent.ACTION_UP){ 
      webView.getParent().requestDisallowInterceptTouchEvent(false); 

     }else         
      webView.getParent().requestDisallowInterceptTouchEvent(true); 

     return false; 
    } 

}); 

để xem chi tiết hơn

http://developer.android.com/reference/android/view/ViewParent.html#requestDisallowInterceptTouchEvent%28boolean%29

Sửa

Detecting pinch in Android

How to detect the pinch-zoom event with OnGestureListener in Android?

http://www.krvarma.com/2010/10/multi-touch-in-android/

http://code.almeros.com/android-multitouch-gesture-detectors#.UP4qp4Zu_ox

Answer 2

Tôi đã làm điều này với 2 quan điểm di chuyển. Có thể nó có thể giúp bạn một chút. đây là mã của tôi:

ScrollView s_parent=(ScrollView)detailView.findViewById(R.id.parent_scroll); 
        ScrollView s_child=(ScrollView)detailView.findViewById(R.id.child_scroll); 
        s_child.setOnTouchListener(new View.OnTouchListener() { 


         @Override 
         public boolean onTouch(View v, MotionEvent event) { 
          // TODO Auto-generated method stub 
          //Log.v("scrooll_touch","CHILD TOUCH"); 
          // Disallow the touch request for parent scroll on touch of child view 
           v.getParent().requestDisallowInterceptTouchEvent(true); 
           return false; 

         } 
        }); 

        s_parent.setOnTouchListener(new View.OnTouchListener() { 

         public boolean onTouch(View v, MotionEvent event) { 
          // Log.v("scrooll_touch","PARENT TOUCH"); 
          findViewById(R.id.child_scroll).getParent().requestDisallowInterceptTouchEvent(false); 
          return false; 
         } 
        });