找不到用于处理Intent的活动{act = android.intent.action.VIEW dat =}

Question

我正在尝试启动在Android浏览器中打开链接的意图。

我用XML拉式解析器填充了listview，其中包含每个项目的url。

奇怪的是，前几项效果很好，需要我下载链接，但是以下项无法正常工作，单击后崩溃。

    view.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {

            String url = worldpopulationlist.get(position).getPopulation();
            Intent i = new Intent(Intent.ACTION_VIEW);

            i.setData(Uri.parse(url));

            context.startActivity(i);
        }
    });

Logcat错误：

 FATAL EXCEPTION: main
 android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.VIEW dat= }
    at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1632)
    at android.app.Instrumentation.execStartActivity(Instrumentation.java:1424)
    at android.app.Activity.startActivityForResult(Activity.java:3424)
    at android.app.Activity.startActivityForResult(Activity.java:3385)
    at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:840)
    at android.app.Activity.startActivity(Activity.java:3627)
    at android.app.Activity.startActivity(Activity.java:3595)
    at Search.ListViewAdapter$1.onClick(ListViewAdapter.java:95)
    at android.view.View.performClick(View.java:4438)
    at android.view.View$PerformClick.run(View.java:18422)
    at android.os.Handler.handleCallback(Handler.java:733)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:136)
    at android.app.ActivityThread.main(ActivityThread.java:5001)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:515)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
    at dalvik.system.NativeStart.main(Native Method)

编辑：

这是我的SerachActivity.java

public class SearchActivity extends Fragment {
    // Declare Variables
    ListView listview;
    ListViewAdapter adapter;
    ProgressDialog mProgressDialog;
    static String RATINGPOINTS = "ratingPoints";
    static String APPHEADLINE = "appHeadline";
    static String STOREURL = "storeURL";
    static String ICONURL = "iconUrl";
    EditText editsearch;
    private List<mobAppModel> worldpopulationlist = null;

    @Override
       public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        Log.i("mobAppModel", "OnCreate()");    
        View rootView = inflater.inflate(R.layout.listview_main, container, false);

        // Execute DownloadXML AsyncTask
        new DownloadXML().execute();
        return rootView; }

    // DownloadXML AsyncTask
    private class DownloadXML extends AsyncTask<Void, Void, Void> {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            // Create a progressdialog
            mProgressDialog = new ProgressDialog(getActivity());
            // Set progressdialog title
//          mProgressDialog.setTitle("Please wait");
//          // Set progressdialog message
//          mProgressDialog.setMessage("Loading...");
//          mProgressDialog.setIndeterminate(false);
//          // Show progressdialog
//          mProgressDialog.show();
        }

        @Override
        protected Void doInBackground(Void... params) {
            // Create the array
            worldpopulationlist = new ArrayList<mobAppModel>();
            XMLParser parser = new XMLParser();
            // Retrive nodes from the given website URL in XMLParser.class
            String xml = parser.getXmlFromUrl("https://dl.dropboxusercontent.com/s/te0c0s7y7zr79tm/kategorijeXML.xml");
            // Retrive DOM element
            Document doc = parser.getDomElement(xml);

            try {
                // Locate the NodeList name
                NodeList nl = doc.getElementsByTagName("appInfo");
                for (int i = 0; i < nl.getLength(); i++) {
                    Element e = (Element) nl.item(i);
                    mobAppModel map = new mobAppModel();
                    map.setRank(parser.getValue(e, RATINGPOINTS));
                    map.setCountry(parser.getValue(e, APPHEADLINE));
                    map.setPopulation(parser.getValue(e, STOREURL));
                    map.setFlag(parser.getValue(e, ICONURL));

                    worldpopulationlist.add(map);
                }
            } catch (Exception e) {
                Log.e("Error", e.getMessage());
                e.printStackTrace();
            }
            return null;
        }

        @Override
        protected void onPostExecute(Void args) {
            // Locate the listview in listview_main.xml
            listview = (ListView) getView().findViewById(R.id.listview);
            // Pass the results into ListViewAdapter.java
            adapter = new ListViewAdapter(getActivity(),
                    worldpopulationlist);
            // Binds the Adapter to the ListView
            listview.setAdapter(adapter);
            // Close the progressdialog
            mProgressDialog.dismiss();
            // Locate the EditText in listview_main.xml
            editsearch = (EditText) getView().findViewById(R.id.search);

            // Capture Text in EditText
            editsearch.addTextChangedListener(new TextWatcher() {

                @Override
                public void afterTextChanged(Editable arg0) {
                    // TODO Auto-generated method stub
                    String text = editsearch.getText().toString()
                            .toLowerCase(Locale.getDefault());
                    adapter.filter(text);
                }

                @Override
                public void beforeTextChanged(CharSequence arg0, int arg1,
                        int arg2, int arg3) {
                    // TODO Auto-generated method stub
                }

                @Override
                public void onTextChanged(CharSequence arg0, int arg1,
                        int arg2, int arg3) {
                    // TODO Auto-generated method stub
                }
            });
        }
    }
}

这是意图所在的ListViewAdapter：

public class ListViewAdapter extends BaseAdapter {

    // Declare Variables
    Context context;
    LayoutInflater inflater;
    ArrayList<HashMap<String, String>> data;
    ImageLoader imageLoader;
    private List<mobAppModel> worldpopulationlist = null;
    private ArrayList<mobAppModel> arraylist;

    public ListViewAdapter(Context context,
            List<mobAppModel> worldpopulationlist) {
        this.context = context;
        this.worldpopulationlist = worldpopulationlist;
        inflater = LayoutInflater.from(context);
        this.arraylist = new ArrayList<mobAppModel>();
        this.arraylist.addAll(worldpopulationlist);
        imageLoader = new ImageLoader(context);
    }

    public class ViewHolder {
        TextView ocjena;
        TextView naziv;
        TextView developer;
        ImageView iconUrl;
    }

    @Override
    public int getCount() {
        return worldpopulationlist.size();
    }

    @Override
    public Object getItem(int position) {
        return worldpopulationlist.get(position);
    }

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

    public View getView(final int position, View view, ViewGroup parent) {
        final ViewHolder holder;
        if (view == null) {
            holder = new ViewHolder();
            view = inflater.inflate(R.layout.listview_item, null);  
            // Locate the TextViews in listview_item.xml
            holder.ocjena = (TextView) view.findViewById(R.id.ocjena);
            holder.naziv = (TextView) view.findViewById(R.id.naziv);
            holder.developer = (TextView) view.findViewById(R.id.developer);
            // Locate the ImageView in listview_item.xml
            holder.iconUrl = (ImageView) view.findViewById(R.id.iconUrl); 
            view.setTag(holder);
        } else {
            holder = (ViewHolder) view.getTag();
        }
        // Set the results into TextViews
        holder.ocjena.setText(worldpopulationlist.get(position).getRank());
        holder.naziv.setText(worldpopulationlist.get(position).getCountry());
        holder.developer.setText(worldpopulationlist.get(position)
                .getPopulation());
        // Set the results into ImageView
        imageLoader.DisplayImage(worldpopulationlist.get(position).getFlag(),
                holder.iconUrl);
        // Listen for ListView Item Click
        view.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {

                String url = worldpopulationlist.get(position).getPopulation();
                Intent i = new Intent(context, ListViewAdapter.class);
                i = new Intent(Intent.ACTION_VIEW);

                i.setData(Uri.parse(url));

                context.startActivity(i);
            }
        });
        return view;
    }

    // Filter Class
    public void filter(String charText) {
        charText = charText.toLowerCase(Locale.getDefault());
        worldpopulationlist.clear();
        if (charText.length() == 0) {
            worldpopulationlist.addAll(arraylist);
        } else {
            for (mobAppModel wp : arraylist) {
                if (wp.getCountry().toLowerCase(Locale.getDefault())
                        .contains(charText)) {
                    worldpopulationlist.add(wp);
                }
            }
        }
        notifyDataSetChanged();
    }
}

SS：

Answer 1

您不应该为列表中的每个项目设置onClickListener 。 这是非常低效的。 相反，您应该在活动中的ListView上设置onItemClickListener 。 单击某项时，将使用单击列表中的位置来调用此方法。