如何解决这个问题 - ＆gt;无法找到显式活动类

时间：2014-06-13 17:30:41

标签： android android-intent android-asynctask android-json

我有一个带有JSON列表视图的片段布局，但是当我点击它们时，我收到了错误。

06-13 13:17:58.492: E/AndroidRuntime(1542): FATAL EXCEPTION: main
06-13 13:17:58.492: E/AndroidRuntime(1542): android.content.ActivityNotFoundException: Unable to find explicit activity class {com.yeftaandrea.plesirsolo/com.yeftaandrea.plesirsolo.KaranganyarAttractionDetailFragment}; have you declared this activity in your AndroidManifest.xml?
06-13 13:17:58.492: E/AndroidRuntime(1542):     at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1628)
06-13 13:17:58.492: E/AndroidRuntime(1542):     at android.app.Instrumentation.execStartActivity(Instrumentation.java:1424)
06-13 13:17:58.492: E/AndroidRuntime(1542):     at android.app.Activity.startActivityForResult(Activity.java:3390)
06-13 13:17:58.492: E/AndroidRuntime(1542):     at android.app.Activity.startActivityForResult(Activity.java:3351)
06-13 13:17:58.492: E/AndroidRuntime(1542):     at android.support.v4.app.FragmentActivity.startActivityFromFragment(FragmentActivity.java:848)
06-13 13:17:58.492: E/AndroidRuntime(1542):     at android.support.v4.app.Fragment.startActivity(Fragment.java:878)
06-13 13:17:58.492: E/AndroidRuntime(1542):     at com.yeftaandrea.plesirsolo.KaranganyarAttractionFragment$1.onItemClick(KaranganyarAttractionFragment.java:80)
06-13 13:17:58.492: E/AndroidRuntime(1542):     at android.widget.AdapterView.performItemClick(AdapterView.java:298)
06-13 13:17:58.492: E/AndroidRuntime(1542):     at android.widget.AbsListView.performItemClick(AbsListView.java:1100)
06-13 13:17:58.492: E/AndroidRuntime(1542):     at android.widget.AbsListView$PerformClick.run(AbsListView.java:2788)
06-13 13:17:58.492: E/AndroidRuntime(1542):     at android.widget.AbsListView$1.run(AbsListView.java:3463)
06-13 13:17:58.492: E/AndroidRuntime(1542):     at android.os.Handler.handleCallback(Handler.java:730)
06-13 13:17:58.492: E/AndroidRuntime(1542):     at android.os.Handler.dispatchMessage(Handler.java:92)
06-13 13:17:58.492: E/AndroidRuntime(1542):     at android.os.Looper.loop(Looper.java:137)
06-13 13:17:58.492: E/AndroidRuntime(1542):     at android.app.ActivityThread.main(ActivityThread.java:5103)
06-13 13:17:58.492: E/AndroidRuntime(1542):     at java.lang.reflect.Method.invokeNative(Native Method)
06-13 13:17:58.492: E/AndroidRuntime(1542):     at java.lang.reflect.Method.invoke(Method.java:525)
06-13 13:17:58.492: E/AndroidRuntime(1542):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
06-13 13:17:58.492: E/AndroidRuntime(1542):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
06-13 13:17:58.492: E/AndroidRuntime(1542):     at dalvik.system.NativeStart.main(Native Method)

这是我的源代码：

1.KaranganyarAttractionFragment 

package com.yeftaandrea.plesirsolo;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import org.apache.http.NameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.TextView;

import com.yeftaandrea.plesirsolo.adapter.KaranganyarJsonAttractionAdapter;

public class KaranganyarAttractionFragment extends Fragment {

    // URL to get contacts JSON
    // JSON Node names
    public static final String TAG_ID = "ID";
    public static final String TAG_NAME = "Name";
    public static final String TAG_ADDRESS = "Address";
    public static final String TAG_PHONE = "Phone";
    public static final String TAG_CITY = "City";
    public static final String TAG_DESCRIPTION = "Description";
    public static final String TAG_AKSESBILITAS = "Aksesbilitas";
    public static final String TAG_Tiket = "Tiket";
    public static final String TAG_FACILITIES = "Faclilities";
    public static final String TAG_LANTITUDE = "Lantitude";
    public static final String TAG_LONGTITUDE = "Longtitude";
    public static final String TAG_PICPATH = "PicPath";

    // Hashmap for ListView
    ArrayList<HashMap<String, String>> attractionList;
    ListView list;

    KaranganyarJsonAttractionAdapter adapter;

    // Progress Dialog
    private ProgressDialog pDialog;

    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {

        View rootView = inflater.inflate(R.layout.fragment_attraction_karanganyar, container, false);

        list = (ListView) rootView.findViewById(R.id.list);

        list.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position,
                    long id) {
                // TODO Auto-generated method stub
                String name = ((TextView) view.findViewById(R.id.Name))
                        .getText().toString();
                String address = ((TextView) view.findViewById(R.id.Address))
                        .getText().toString();
                String phone = ((TextView) view.findViewById(R.id.Phone))
                        .getText().toString();

                Intent i = new Intent(getActivity().getApplicationContext(), KaranganyarAttractionDetailFragment.class);

                i.putExtra("TAG_ID", id);               
                i.putExtra("TAG_NAME", name);   
                i.putExtra("TAG_ADDRESS", address);
                i.putExtra("TAG_PHONE", phone);     
                startActivity(i);
            }
            });

        // Calling async task to get json
        new LoadTask().execute();

        return rootView;
    }

    public void loadAttraction(){
        attractionList = new 
                ArrayList<HashMap<String, String>>();
        JSONParser parser = new JSONParser();

        List<NameValuePair> params = new ArrayList<NameValuePair>();

        try {
            JSONArray attraction = parser.makeHttpRequestArray("http://plesirsolo.meximas.com/plesir/attraction/wisata/karanganyar/", "GET", params);
            // JSONArray attraction = parser.makeHttpRequestArray("http://192.168.56.1:8080/examples/json.html", "GET", params);
            // looping through All messages
            if(attraction!=null){
                for (int i = 0; i < attraction.length(); i++) {
                    JSONObject c = attraction.getJSONObject(i);

                    // Storing each json item in variable
                    String id = c.getString(TAG_ID);
                    String nama = c.getString(TAG_NAME);
                    String address = c.getString(TAG_ADDRESS);
                    String phone = c.getString(TAG_PHONE);
                    String picPath = c.getString(TAG_PICPATH);

                    // creating new HashMap
                    HashMap<String, String> map = new HashMap<String, String>();

                    // adding each child node to HashMap key => value
                    map.put(TAG_ID, id);
                    map.put(TAG_NAME, nama);
                    map.put(TAG_ADDRESS, address);
                    map.put(TAG_PHONE, phone);
                    map.put(TAG_PICPATH, picPath);

                    // adding HashList to ArrayList
                    attractionList.add(map);
                }

                adapter = new KaranganyarJsonAttractionAdapter(
                        getActivity(), attractionList);
            }


        } catch (JSONException e) {
            e.printStackTrace();
        }
    }

    private class LoadTask extends AsyncTask<Void, Void, Void> {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            pDialog = new ProgressDialog(getActivity());
            pDialog.setMessage("Loading Attraction ...");
            pDialog.setIndeterminate(false);
            pDialog.setCancelable(false);
            pDialog.show();
        }

        @Override
        protected Void doInBackground(Void... params) {
            loadAttraction();
            return null;
        }

        @Override
        protected void onPostExecute(Void result) {
            // dismiss the dialog after getting all products
            pDialog.dismiss();
            super.onPostExecute(result);
            list.setAdapter(adapter);
            Log.i("JSON", "TEST");
            Log.i("JSON", attractionList.toString());
        }       

    }

}

  1. KaranganyarJsonAttractionAdapter

    公共类KaranganyarJsonAttractionAdapter扩展了BaseAdapter {

    private ArrayList<HashMap<String, String>> data;
public ImageLoader imageLoader;
private Context context;
public String imageBaseDirectory  = "http://plesirsolo.meximas.com/plesir/images/wisata/";


public KaranganyarJsonAttractionAdapter(Context context,
        ArrayList<HashMap<String, String>> attractionList) {
    this.data = attractionList;
    this.context = context;
    imageLoader = new ImageLoader(context);
}

@Override
public int getCount() {
    // TODO Auto-generated method stub
    if(data != null)
        return data.size();
    return 0;
}

@Override
public Object getItem(int position) {
    // TODO Auto-generated method stub
    return position;
}

@Override
public long getItemId(int position) {
    // TODO Auto-generated method stub
    return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    // TODO Auto-generated method stub
    if (convertView == null) {
        LayoutInflater mInflater = (LayoutInflater) context
                .getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
        convertView = mInflater.inflate(R.layout.list_row2, null);
    }

    TextView Name = (TextView)convertView.findViewById(R.id.Name); // name
    TextView Address = (TextView)convertView.findViewById(R.id.Address); // address
    TextView Phone = (TextView)convertView.findViewById(R.id.Phone); // phone
    ImageView PicPath = (ImageView)convertView.findViewById(R.id.list_image); // thumb image

    HashMap<String, String> attraction = new HashMap<String, String>();
    attraction = data.get(position);

    Log.i("JSON", attraction.toString());

    // Setting all values in listview
    Name.setText(attraction.get(KaranganyarAttractionFragment.TAG_NAME));
    Address.setText(attraction.get(KaranganyarAttractionFragment.TAG_ADDRESS));
    Phone.setText(attraction.get(KaranganyarAttractionFragment.TAG_PHONE));

    Log.i("JSON", attraction.get(KaranganyarAttractionFragment.TAG_NAME));
    imageLoader.DisplayImage(imageBaseDirectory+attraction.get(KaranganyarAttractionFragment.TAG_PICPATH), position, PicPath);
    return convertView;
}

    }

  2. KaranganyarAttractionDetailFragment

    public class KaranganyarAttractionDetailFragment extends Fragment {     //获取联系人JSON的URL     // JSON节点名称     public static final String TAG_ID =＆＃34; ID＆＃34 ;;     public static final String TAG_NAME =＆＃34; Name＆＃34 ;;     public static final String TAG_ADDRESS =＆＃34; Address＆＃34 ;;     public static final String TAG_PHONE =＆＃34; Phone＆＃34 ;;     public static final String TAG_CITY =＆＃34; City＆＃34 ;;     public static final String TAG_DESCRIPTION =＆＃34; Description＆＃34 ;;     public static final String TAG_AKSESBILITAS =＆＃34; Aksesbilitas＆＃34 ;;     public static final String TAG_Tiket =＆＃34; Tiket＆＃34 ;;     public static final String TAG_FACILITIES =＆＃34; Faclilities＆＃34 ;;     public static final String TAG_LANTITUDE =＆＃34; Lantitude＆＃34 ;;     public static final String TAG_LONGTITUDE =＆＃34; Longtitude＆＃34 ;;     public static final String TAG_PICPATH =＆＃34; PicPath＆＃34 ;; 

    // Hashmap for ListView
ArrayList<HashMap<String, String>> attractionList;
ListView list;

KaranganyarJsonAttractionDetailAdapter adapter;

public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {

    View rootView = inflater.inflate(R.layout.fragment_attraction_karanganyar_detail, container, false);

    // Calling async task to get json
    new LoadTask().execute();

    return rootView;


}

public void loadAttraction(){
    attractionList = new 
            ArrayList<HashMap<String, String>>();
    JSONParser parser = new JSONParser();

    List<NameValuePair> params = new ArrayList<NameValuePair>();

    try {
        JSONArray attraction = parser.makeHttpRequestArray("http://plesirsolo.meximas.com/plesir/attraction/wisata/karanganyar/", "GET", params);
        // JSONArray attraction = parser.makeHttpRequestArray("http://192.168.56.1:8080/examples/json.html", "GET", params);
        // looping through All messages
        if(attraction!=null){
            for (int i = 0; i < attraction.length(); i++) {
                JSONObject c = attraction.getJSONObject(i);

                // Storing each json item in variable
                String id = c.getString(TAG_ID);
                String nama = c.getString(TAG_NAME);
                String address = c.getString(TAG_ADDRESS);
                String phone = c.getString(TAG_PHONE);
                String picPath = c.getString(TAG_PICPATH);

                // creating new HashMap
                HashMap<String, String> map = new HashMap<String, String>();

                // adding each child node to HashMap key => value
                map.put(TAG_ID, id);
                map.put(TAG_NAME, nama);
                map.put(TAG_ADDRESS, address);
                map.put(TAG_PHONE, phone);
                map.put(TAG_PICPATH, picPath);

                // adding HashList to ArrayList
                attractionList.add(map);
            }

            adapter = new KaranganyarJsonAttractionDetailAdapter(
                    getActivity(), attractionList);
        }


    } catch (JSONException e) {
        e.printStackTrace();
    }
}

private class LoadTask extends AsyncTask<Void, Void, Void> {

    @Override
    protected Void doInBackground(Void... params) {
        loadAttraction();
        return null;
    }

    @Override
    protected void onPostExecute(Void result) {
        super.onPostExecute(result);
        list.setAdapter(adapter);
        Log.i("JSON", "TEST");
        Log.i("JSON", attractionList.toString());
    }       


}

    }

  3. KaranganyarJsonAttractionDetailAdapter

    public class KaranganyarJsonAttractionDetailAdapter扩展BaseAdapter {

    private ArrayList<HashMap<String, String>> data;
public ImageLoader imageLoader;
private Context context;
public String imageBaseDirectory  = "http://plesirsolo.meximas.com/plesir/images/wisata/";

public KaranganyarJsonAttractionDetailAdapter(Context context,
        ArrayList<HashMap<String, String>> attractionList) {
    this.data = attractionList;
    this.context = context;
    imageLoader = new ImageLoader(context);
}

@Override
public int getCount() {
    // TODO Auto-generated method stub
    if(data != null)
        return data.size();
    return 0;
}

@Override
public Object getItem(int position) {
    // TODO Auto-generated method stub
    return position;
}

@Override
public long getItemId(int position) {
    // TODO Auto-generated method stub
    return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    // TODO Auto-generated method stub
    if (convertView == null) {
        LayoutInflater mInflater = (LayoutInflater) context
                .getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
        convertView = mInflater.inflate(R.layout.fragment_attraction_karanganyar_detail, null);
    }
    TextView Name = (TextView)convertView.findViewById(R.id.Name); // name
    TextView Address = (TextView)convertView.findViewById(R.id.Address); // address
    TextView Phone = (TextView)convertView.findViewById(R.id.Phone); // phone
    ImageView PicPath = (ImageView)convertView.findViewById(R.id.list_image); // thumb image

    HashMap<String, String> attraction = new HashMap<String, String>();
    attraction = data.get(position);

    Log.i("JSON", attraction.toString());

    // Setting all values in listview
    Name.setText(attraction.get(KaranganyarAttractionDetailFragment.TAG_NAME));
    Address.setText(attraction.get(KaranganyarAttractionDetailFragment.TAG_ADDRESS));
    Phone.setText(attraction.get(KaranganyarAttractionDetailFragment.TAG_PHONE));

    Log.i("JSON", attraction.get(KaranganyarAttractionDetailFragment.TAG_NAME));
    imageLoader.DisplayImage(imageBaseDirectory+attraction.get(KaranganyarAttractionDetailFragment.TAG_PICPATH), position, PicPath);
    return convertView;

}

    }

  4. 清单

    <uses-sdk
    android:minSdkVersion="14"
    android:targetSdkVersion="18" />

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.yeftaandrea.plesirsolo.SplashScreen"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name="com.yeftaandrea.plesirsolo.MainActivity"
        android:label="@string/app_name" >
    </activity>
</application>

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

3 个答案:

答案 0 :(得分：0)

你最容易忘记的事情。

<activity
    android:name=".KaranganyarAttractionDetailFragment">
    </activity>

将代码复制并粘贴到清单中。

<uses-sdk
    android:minSdkVersion="14"
    android:targetSdkVersion="18" />

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.yeftaandrea.plesirsolo.SplashScreen"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
    android:name=".KaranganyarAttractionDetailFragment">
    </activity>
    <activity
        android:name="com.yeftaandrea.plesirsolo.MainActivity"
        android:label="@string/app_name" >
    </activity>
</application>

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

答案 1 :(得分：0)

使用此方法只需为应用程序添加名称。

<application
        android:name="com.yeftaandrea.plesirsolo"
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >

答案 2 :(得分：-1)

导航到项目目录中的AndroidManifest.xml文件。将此行放在<application></application>标记之间（应该有类似的标记）。

<activity android:name=".KaranganyarAttractionDetailFragment"></activity>
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