webview all'interno della listview: conflitti di eventi di tocco Quindi non in grado di pizzicare Zoom IN/OUT in Android

Question

Ho un listview personalizzato che viene riempito con webview. Voglio usare il pizzico zoom in/Zoom out per il mio webview. Ma non riesco a ottenere il pizzico dello zoom in avanti/indietro in modo flessibile quando pizzico lo webview che sta attivando lo scorrimento listview's su e giù.

come è possibile gestire l'evento di scorrimento SU/GIÙ per listview e pizzicare contemporaneamente per webview.

qui è la mia 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> 

ecco il mio 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> 

e qui è la mia 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

è necessario implementare setOnTouchListener ascoltatore in WebView e scrivere questa dichiarazione all'interno 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; 
    } 

}); 

per maggiori dettagli

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

A cura

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

ho fatto questa cosa con 2 viste di scorrimento. Può essere che ti può aiutare un po '. qui è il mio codice:

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; 
         } 
        });