Question

当我点击ListItem时，我想要出现一个新活动，这是我的整个代码：

这是ListViewActivity的代码：

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

import json.JSONParser;

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

import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;

public class IntervActivity extends ListActivity implements OnItemClickListener
{
    //private static final String TAG_PID = "ID";
    private static final String TAG_NAME = "name";
    ArrayList<HashMap<String, String>> actList;
    private ProgressDialog progressMessage;
    private static String url_act= "http://10.0.2.2/Scripts/liste_interventions.php";
    //private static String url_act= "http://192.168.43.95/android_Web_Service/actualite.php";
    JSONParser jParser = new JSONParser();
    JSONArray act = null;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.interv_list);
        actList = new ArrayList<HashMap<String, String>>();
        new LoadAllact().execute();

           // Get listview
         ListView lv = getListView();
         lv.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {
                // getting values from selected ListItem
                String name= ((TextView) view.findViewById(R.id.name)).getText().toString();

                // Starting new intent
                Intent in = new Intent(IntervActivity.this,
                        DetailsActivity.class);
                // sending pid to next activity
                in.putExtra(TAG_NAME, name);
                startActivity(in);
            }
        });



    }


    class LoadAllact extends AsyncTask<String,String,String> 
    {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            progressMessage = new ProgressDialog(IntervActivity.this);
            progressMessage.setMessage("chargement actualité...");
            progressMessage.setIndeterminate(false);
            progressMessage.setCancelable(false);
            progressMessage.show();
        }

        protected String doInBackground(String... args) {
        List<NameValuePair> params = new ArrayList<NameValuePair>();
        JSONObject json = jParser.makeHttpRequest(url_act, "GET", params);
        Log.d("actualite: ", json.toString());
        try {
            int success = json.getInt("success");

            if (success == 1)
            {
                act = json.getJSONArray("act");
                for (int i = 0; i < act.length(); i++) 
                {
                    JSONObject c = act.getJSONObject(i);
                    // String   id = c.getString("id");
                     String name = c.getString("name");

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

                     // adding each child node to HashMap key => value
                     //map.put("Int_id",    id);
                     map.put("Int_name", name);
                    actList.add(map);
                }
            }
        } catch (JSONException e) {e.printStackTrace();}
        return null;
        }
        protected void onPostExecute(String file_url) 
        {
            progressMessage.dismiss();
            runOnUiThread(new Runnable() 
            {
                public void run() {
                ListAdapter adapter = new SimpleAdapter(
                        IntervActivity.this, actList,
                R.layout.interv_list_item, new String[] {"Int_name"},
                new int[]{ R.id.name });
                setListAdapter(adapter);
                }
            });

        }

    }


    @Override
    public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
        // TODO Auto-generated method stub

    }
    }

这是我在单击ListView的任何项目时想要显示的DetailsActivity的代码：

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

import json.JSONParser;

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

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.MenuItem;
import android.widget.EditText;
import android.widget.TextView;

public class DetailsActivity extends Activity {
     private static final String TAG_NAME = "name";
     public String name;   
      private static final String TAG_SUCCESS = "success";
     ArrayList<HashMap<String, String>> actList;
        private ProgressDialog pDialog;
        private static String url_int_details= "http://10.0.2.2/Scripts/details_intervention.php";
        //private static String url_act= "http://192.168.43.95/android_Web_Service/actualite.php";
        JSONParser jParser = new JSONParser();

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.details_activity);

        Intent i = getIntent();

        // getting product id (pid) from intent
       String name = i.getStringExtra("name");

        // Getting complete product details in background thread
        new GetProductDetails().execute();




    }
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();



        return super.onOptionsItemSelected(item);
    }
    class GetProductDetails extends AsyncTask<String, String, String> {

        /**
         * Before starting background thread Show Progress Dialog
         * */
        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            pDialog = new ProgressDialog(DetailsActivity.this);
            pDialog.setMessage("Loading product details. Please wait...");
            pDialog.setIndeterminate(false);
            pDialog.setCancelable(true);
            pDialog.show();
        }

        /**
         * Getting product details in background thread
         * */
        protected String doInBackground(String... params) {


            // updating UI from Background Thread
            runOnUiThread(new Runnable() {
                public void run() {
                    // Check for success tag
                    int success;
                    try {
                        // Building Parameters
                        List<NameValuePair> params = new ArrayList<NameValuePair>();
                        params.add(new BasicNameValuePair("name", name));

                        // getting product details by making HTTP request
                        // Note that product details url will use GET request
                        JSONObject json = jParser.makeHttpRequest(
                                url_int_details, "GET", params);

                        // check your log for json response
                        Log.d("Single Product Details", json.toString());

                        // json success tag
                        success = json.getInt(TAG_SUCCESS);
                        if (success == 1) {
                            // successfully received product details
                            JSONArray productObj = json
                                    .getJSONArray("interv"); // JSON Array

                            // get first product object from JSON Array
                            JSONObject product = productObj.getJSONObject(0);

                            TextView tvLibelle = (TextView) 
                                    findViewById(R.id.textView1);
                            tvLibelle.setText(product.getString("name"));
                            TextView tvDate= (TextView) 
                                    findViewById(R.id.textView2);
                            tvDate.setText(product.getString("date"));
                            TextView tvEchéance= (TextView) 
                                    findViewById(R.id.textView3);
                            tvEchéance.setText(product.getString("date_deadline"));
                            TextView tvPriorité= (TextView) 
                                    findViewById(R.id.textView4);
                            tvPriorité.setText(product.getString("priority"));
                            TextView tvDescription= (TextView) 
                                    findViewById(R.id.textView5);
                            tvDescription.setText(product.getString("description"));
                            TextView tvEtat= (TextView) 
                                    findViewById(R.id.textView6); 
                            tvEtat.setText(product.getString("state"));
                        }else{
                            // product with pid not found
                        }
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                }
            });

            return null;
        }

        /**
         * After completing background task Dismiss the progress dialog
         * **/
        protected void onPostExecute(String file_url) {
            // dismiss the dialog once got all details
            pDialog.dismiss();
        }
    }
}

这是DetailsActivity xml代码：

<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"
    android:gravity="top"

    android:background="#99E7E5"
    tools:context="com.example.mobisav.DetailsActivity" >

    <TextView
        android:id="@+id/textView6"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/textView4"
        android:layout_alignBottom="@+id/textView4"
        android:layout_alignRight="@+id/textView2"
        android:hint="@string/Etat"
        android:textAppearance="?android:attr/textAppearanceSmall" />

    <TextView
        android:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView2"
        android:layout_below="@+id/textView2"
        android:layout_marginTop="36dp"
        android:hint="@string/Echeance"
        android:textAppearance="?android:attr/textAppearanceSmall" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_toRightOf="@+id/textView5"
        android:hint="@string/Nom_intervention" />

    <TextView
        android:id="@+id/textView4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignRight="@+id/textView1"
        android:layout_centerVertical="true"
        android:hint="@string/Priority"
        android:textAppearance="?android:attr/textAppearanceSmall" />

    <TextView
        android:id="@+id/textView5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/button1"
        android:layout_alignLeft="@+id/textView6"
        android:layout_marginBottom="33dp"
        android:hint="@string/Description"
        android:textAppearance="?android:attr/textAppearanceSmall" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView1"
        android:layout_marginTop="28dp"
        android:hint="@string/Date"
        android:textAppearance="?android:attr/textAppearanceSmall" />

    <Button
        android:id="@+id/button1"
        style="?android:attr/buttonStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_marginBottom="14dp"
        android:layout_toLeftOf="@+id/textView4"
        android:hint="@string/Appeler" />

</RelativeLayout>

最后这是与数据库匹配的php文件：

<?php
// array for JSON response
$response = array();
$hostname_localhost ='localhost';
$port_localhost =5432;
$database_localhost ='techmobi';
$username_localhost ='openpg';
$password_localhost ='openpgpwd';
$localhost = "host='$hostname_localhost' port='$port_localhost' dbname='$database_localhost' user='$username_localhost' password='$password_localhost'";
// check for post data
$connexion =pg_connect($localhost) or die ("Erreur de connexion ".pg_last_error());
if (isset($_GET["name"])) {
    $name = $_GET["name"];
$query_search = "SELECT id, name, date, priority, state, description, date_deadline FROM crm_helpdesk WHERE name = $name";
$query_exec = pg_query($query_search) or die(pg_error());
if (!empty($query_exec )) {
        // check for empty result
        if (pg_num_rows($result) > 0) {

            $query_exec = pg_fetch_array($query_exec );

            $interv = array();
            $interv["id"] = $query_exec ["id"];
            $interv["name"] = $query_exec ["name"];
            $interv["date"] = $query_exec ["date"];
            $interv["description"] = $query_exec ["description"];
            $interv["priority"] = $query_exec ["priority"];
            $interv["state"] = $query_exec ["state"];
            $interv["date_deadline"] = $query_exec ["date_deadline"];

            // success
            $response["success"] = 1;

            // user node
            $response["interv"] = array();

            array_push($response["interv"], $interv);

            // echoing JSON response
            echo json_encode($response);
        } else {
            // no product found
            $response["success"] = 0;
            $response["message"] = "No product found";

            // echo no users JSON
            echo json_encode($response);
        }
    } else {
        // no product found
        $response["success"] = 0;
        $response["message"] = "No product found";

        // echo no users JSON
        echo json_encode($response);
    }
} else {
    // required field is missing
    $response["success"] = 0;
    $response["message"] = "Required field(s) is missing";

    // echoing JSON response
    echo json_encode($response);
}
?>

当我运行我的应用程序并单击列表中的任何项目时，会出现一个新活动，但数据库中没有数据。

请帮忙

Answer 1

好吧，问题是function rIN() { randomImgNumber = (Math.round(imgNumber * Math.random())) - 1; if (randomImgNumber === "undefined") { rIN(); } return imgArray[randomImgNumber]; }中的字符串url_int_details与DetailsActivity相同。我在url_act中可以看到的是：您使用“http://10.0.2.2/Scripts/details_intervention.php”中的GET方法。这个网址包含一个listView，如你所说，但不是一个细节。那么如何解决这个问题呢。您应该像这样创建DetailsActivity：

new_url_int_details

您的网址必须包含您商品的ID。我做了一些像你的想法，你可以从我的项目中学到更多东西。这是我的Detail_Activity：

http://10.0.2.2/Scripts/details_intervention.php?id=12

}

这是我的php文件：

public class FMovieDetailsActivity extends Activity {
ArrayList<CinemaItems> cinemaList;
String id;
TextView tvNameF;
TextView tvLengthF;
TextView tvIMDbF;
TextView tvStartF;
TextView tvDescriptionF;
TextView tvCatF;
TextView tvTrailer;
TextView tvLengthTrailer;
ListView listView;
Button btnTrailer;

private Context context;

ImageView f_imageTrailer;
ImageView f_imageView;
private static final String TAG_ID = "id";
private static final String TAG_FUTURE_MOVIE = "future_movie";
private static final String TAG_NAME_F = "movienameF";
private static final String TAG_DESCRIPTION_F = "descriptionF";
private static final String TAG_IMDB_F = "imdbF";
private static final String TAG_LENGTH_F = "lengthF";
private static final String TAG_CAT = "cat_name";
private static final String TAG_IMAGE_F = "m_imageF";
private static final String TAG_SUCCESS_F = "success";
private static final String TAG_START_F = "startdateF";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.moviedetails);
    cinemaList = new ArrayList<CinemaItems>();

    Intent i = getIntent();
    id = i.getStringExtra(TAG_ID);
    new JSONAsyncTask().execute();

    tvNameF = (TextView) findViewById(R.id.tvMovieName);
    tvLengthF = (TextView) findViewById(R.id.tvLength);
    tvIMDbF = (TextView) findViewById(R.id.tvIMdb);
    tvStartF = (TextView) findViewById(R.id.tvStartDate);
    tvDescriptionF = (TextView) findViewById(R.id.tvDescription);
    tvCatF = (TextView) findViewById(R.id.tvCategory);
    f_imageView = (ImageView) findViewById(R.id.imageMovieDetail);

    ActionBar actionBar = getActionBar();
    actionBar.setDisplayHomeAsUpEnabled(true);

}

class JSONAsyncTask extends AsyncTask<String, String, String> {
    ProgressDialog dialog;

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        dialog = new ProgressDialog(FMovieDetailsActivity.this);
        dialog.setMessage("Loading, please wait");
        dialog.setTitle("Connecting server");
        dialog.show();
        dialog.setCancelable(false);
    }

    @Override
    protected String doInBackground(String... urls) {
        try {
            List<NameValuePair> params = new ArrayList<NameValuePair>();
            params.add(new BasicNameValuePair(TAG_ID, id));
            Log.i("show parse id", id);
            String paramString = URLEncodedUtils.format(params, "utf-8");
            //this is your problem, You lack of this url
            String url = ServicesConfig.SERVICES_HOST + ServicesConfig.SERVICES_GET_FUTURE_DETAILS + "?"
                    + paramString;

            Log.i("show url", url);
            HttpGet httpget = new HttpGet(url);
            HttpClient httpClient = new DefaultHttpClient();
            HttpResponse respone = httpClient.execute(httpget);
            HttpEntity entity = respone.getEntity();
            return EntityUtils.toString(entity, "UTF-8");

        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    @Override
    protected void onPostExecute(String respone) {
        try {

            JSONObject jsono = new JSONObject(respone);
            int success = jsono.optInt(TAG_SUCCESS_F, 0);
            if (success == 1) {
                JSONObject jsonObject = jsono.getJSONObject(TAG_FUTURE_MOVIE);
                tvNameF.setText(jsonObject.optString(TAG_NAME_F));
                tvIMDbF.setText("IMDb: " + jsonObject.optString(TAG_IMDB_F));
                tvLengthF.setText("Duration: " + jsonObject.optString(TAG_LENGTH_F));
                tvStartF.setText("Start: " + jsonObject.optString(TAG_START_F));
                tvDescriptionF.setText(jsonObject.optString(TAG_DESCRIPTION_F));
                tvCatF.setText(jsonObject.optString(TAG_CAT));

                Picasso.with(context).load(ServicesConfig.SERVICES_HOST + jsonObject.optString(TAG_IMAGE_F)).fit()
                        .into(f_imageView);
            } else {
                Toast.makeText(getBaseContext(), "Unable to fetch data from server", Toast.LENGTH_SHORT).show();
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
        dialog.dismiss();
    }

}

@Override
public boolean onOptionsItemSelected(MenuItem item) {

    switch (item.getItemId()) {
    case android.R.id.home:

        this.finish();
        return true;

    }
    return super.onOptionsItemSelected(item);
}

ListView的OnItemClick

1 个答案: