我开发了一个应用程序，将我的android应用程序连接到远程服务器，并在listview中显示数据。
我做了所有的事情，但是数据没有显示在listview中。
这些是我用来完成的文件，请帮助我:
MediaActivity.java
package com.shadatv.shada;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Locale;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.res.Configuration;
import android.net.ParseException;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
public class MediaActivity extends OptionsMenu {
Locale locale;
// boolean mybooks;
Configuration config = new Configuration();
static SharedPreferences sharedPreferenceid;
static SharedPreferences.Editor editorid;
public static final String Myid = "Myid";
String myid = "";
InputStream is = null;
StringBuilder sb = null;
String resultt = "";
JSONArray jArray;
String result = null;
public DAOCanticles cantDatabase = null;
int numberofrowssss;
int responseCode;
String targetcover, targetbname, targetauthname;
public String caNameField = "", caLinkField = "", caImgField = "";
// ///////////////////ONLINE BESTSALED//////////////////////
String caNameJson, caLinkJson, caImgJson;
public ArrayList<String> caNameHolder = new ArrayList<String>();
public ArrayList<String> caLinkHolder = new ArrayList<String>();
public ArrayList<String> caImgHolder = new ArrayList<String>();
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.media);
cantDatabase = new DAOCanticles(this);
new LoadData().execute();
}
// =============================================================================
public void onClickPrograms(View view) {
startActivity(new Intent("com.shadatv.ProgramsActivity"));
}
// =============================================================================
public void onClickCanticles(View view) {
startActivity(new Intent("com.shadatv.CanticlesActivity"));
}
// =============================================================================
public void onClickDocumentaries(View view) {
startActivity(new Intent("com.shadatv.DocumentariesActivity"));
}
// =============================================================================
private class LoadData extends AsyncTask<Void, Void, Void> {
public ProgressDialog progressDialog1;
@Override
protected Void doInBackground(Void... params) {
cantDatabase.deletetable();
getCanticlesByJSON();
addCanticles();
return null;
}
@Override
// can use UI thread here
protected void onPreExecute() {
CharSequence contentTitle = getString(R.string.loading);
this.progressDialog1 = ProgressDialog.show(MediaActivity.this, "",
contentTitle);
}
// -------------------------------------------//
@Override
protected void onPostExecute(final Void unused) {
this.progressDialog1.dismiss();
}
}
// =============================================================================
public void getCanticlesByJSON() {
try {
HttpClient httpclient = new DefaultHttpClient();
try {
} catch (Exception e) {
Log.e("my_log_tag", e.toString());
}
// buffered reader
try {
HttpPost httppost = new HttpPost(
"http://dt-works.com/ags/shadatv/canticles/android_data");
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
BufferedReader reader = new BufferedReader(
new InputStreamReader(is, "UTF-8"), 80);
sb = new StringBuilder();
sb.append(reader.readLine() + "'n");
String line = "0";
while ((line = reader.readLine()) != null) {
sb.append(line + "'n");
}
is.close();
result = EntityUtils.toString(entity);
//result = sb.toString();
} catch (Exception e) {
Log.e("my_log_tag", e.toString());
}
try {
result = result.substring(1);
jArray = new JSONArray(result);
JSONObject json_data = null;
for (int i = 0; i < jArray.length(); i++) {
json_data = jArray.getJSONObject(i);
caNameJson = json_data.getString("ca_name");
caLinkJson = json_data.getString("ca_link");
caImgJson = json_data.getString("ca_link");
caNameHolder.add(caNameJson);
caLinkHolder.add(caLinkJson);
caImgHolder.add(caImgJson);
}
} catch (JSONException e) {
Log.e("my_log_tag", e.toString());
}
} catch (ParseException e) {
Log.e("my_log_tag", e.toString());
} catch (Exception e) {
Log.e("my_log_tag", e.toString());
}
}
// =============================================================================
public void addCanticles() {
try {
for (int i = 0; i < caNameHolder.size(); i++) {
caNameField = caNameHolder.get(i);
caLinkField = caLinkHolder.get(i);
caImgField = caImgHolder.get(i);
cantDatabase.createCanticle(caNameField, caLinkField,
caImgField);
}
} catch (Exception e) {
Log.e("my_log_tag", "notfilled yet");
}
}
}
CanticlesActivity.java
package com.shadatv.shada;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.zip.ZipInputStream;
import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.CipherOutputStream;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
import android.content.SharedPreferences;
import android.database.Cursor;
public class CanticlesActivity extends Activity {
int read;
boolean flage;
final Context context = this;
String picpath="http://img.youtube.com/vi/";
ArrayList<String> getCaName = new ArrayList<String>();
ArrayList<String> getCaLink = new ArrayList<String>();
ArrayList<String> getCaImg = new ArrayList<String>();
String targetCaName;
String targetCaLink;
String targetCaImg;
File sdcard = Environment.getExternalStorageDirectory();
File shadaRoot = new File (sdcard.getAbsolutePath() + "/Shada_Folder");
BitmapFactory.Options options = new BitmapFactory.Options();
Bitmap bm ;
ImageView img ;
public DAOCanticles cantDatabase =null;
byte[] encoded;
String value;
String useriddd;
//=============================================================================
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.canticles);
cantDatabase = new DAOCanticles(this);
new LoadData().execute();
}
//=============================================================================
private class LoadData extends AsyncTask<Void, Void, Void> {
private ProgressDialog progressDialog;
@Override
// can use UI thread here
protected void onPreExecute() {
CharSequence contentTitle = getString(R.string.loading);
this.progressDialog = ProgressDialog.show(CanticlesActivity.this,"",contentTitle);
}
//-------------------------------------------//
@Override
protected void onPostExecute(final Void unused) {
this.progressDialog.dismiss();
showCanticles();
}
//-------------------------------------------//
@Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
// HTTP post
getCanticles();
return null;
}
}
//=============================================================================
public void getCanticles() {
try{
Cursor canticles = cantDatabase.getCanticlesList();
do{
getCaName.add(canticles.getString(0));
getCaLink.add(canticles.getString(1));
getCaImg.add(canticles.getString(2));
}
while(canticles.moveToNext());
}catch(Exception e){
}
}
//=============================================================================
public void Downloadimage(String imgURL) {
try {
String finlpth="";
finlpth=picpath + imgURL + "/2.jpg";
shadaRoot.mkdirs();
URL u = new URL(finlpth);
HttpURLConnection c = (HttpURLConnection) u.openConnection();
c.setRequestMethod("GET");
c.setDoOutput(true);
c.connect();
File DownloadedFile=new File(shadaRoot, imgURL + ".jpg");
// if(!outfile.exists())
FileOutputStream f = new FileOutputStream(DownloadedFile);
InputStream in = c.getInputStream();
byte[] buffer = new byte[1024];
int len1 = 0;
while ((len1 = in.read(buffer)) > 0) {
f.write(buffer, 0, len1);
}
f.close();
} catch (Exception e) {
Log.d("Downloader", e.getMessage());
}
}
//=============================================================================
public void showCanticles()
{
final ListView listview = (ListView) findViewById(R.id.listView1);
for(int i=0; i < getCaName.size(); i++)
{
String caName=getCaName.get(i);
String caLink=getCaLink.get(i);
String caImg=getCaImg.get(i);
Toast.makeText(getBaseContext(), caName, Toast.LENGTH_SHORT).show();
if(!caImg.equalsIgnoreCase("0"))
{
Downloadimage(caLink);
}
}
listview.setOnItemClickListener(new ListView.OnItemClickListener(){
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
long selectedItemId = listview.getSelectedItemId();
ListAdapter adapterr = listview.getAdapter();
String selectedValue = (adapterr.getItem(position)).toString();
String selectedCaName=getCaName.get(position);
String selectedCaLink=getCaLink.get(position);
// // custom dialog
final Dialog dialog = new Dialog(context);
dialog.setContentView(R.layout.customdialogue);
dialog.setTitle(selectedCaName);
// set the custom dialog components - text, image and button
String selectedbookcover=getCaImg.get(position);
String test= shadaRoot+"/"+ selectedCaName;
String myJpgPath = test+".jpg";
TextView caLink = (TextView) dialog.findViewById(R.id.ca_link);
caLink.setText(selectedCaLink);
options.inSampleSize = 6;
Button dialogButton = (Button) dialog.findViewById(R.id.dialogButtonOK);
// if button is clicked, close the custom dialog
dialogButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
dialog.dismiss();
}
});
dialog.show();
dialog.getWindow().setLayout(350,350);
}
});
listview.setAdapter(new DataAdapter(
CanticlesActivity.this,
getCaName.toArray(new String[getCaName.size()]),
getCaLink.toArray(new String[getCaLink.size()]),
getCaImg.toArray(new String[getCaImg.size()])));
}
}
canticles.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/bg1"
android:orientation="vertical" >
<ListView
android:id="@+id/listView1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:divider="#b5b5b5"
android:dividerHeight="1dp"
android:listSelector="@drawable/list_selector" >
</ListView>
</LinearLayout>
custom_grid.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@drawable/list_selector"
android:gravity="left"
android:orientation="horizontal"
android:padding="10dip" >
<!-- ListRow Left sied Thumbnail image -->
<ImageView
android:id="@+id/caImgView"
android:layout_width="57dip"
android:layout_height="84dip"
android:layout_alignLeft="@+id/linearLayout1"
android:layout_alignTop="@+id/linearLayout1"
android:paddingLeft="0dip"
android:scaleType="fitXY"
android:src="@drawable/noimage" />
<LinearLayout
android:id="@+id/linearLayout2"
android:layout_width="170dip"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/targetmonth1"
android:layout_alignTop="@+id/targetmonth1"
android:layout_marginLeft="16dp"
android:layout_toRightOf="@+id/targetmonth1"
android:orientation="vertical"
android:padding="0dip" >
<TextView
android:id="@+id/caNameView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="@+id/linearLayout1"
android:layout_centerHorizontal="true"
android:layout_gravity="center_horizontal"
android:text="dddddddd"
android:textColor="#040404"
android:textSize="13dip"
android:textStyle="bold"
android:typeface="sans" />
<TextView
android:id="@+id/caLinkView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/caNameView"
android:layout_alignRight="@+id/caNameView"
android:layout_below="@+id/caNameView"
android:layout_gravity="center_horizontal"
android:text="author"
android:textColor="#343434"
android:textSize="9dip"
android:typeface="sans" />
</LinearLayout>
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:src="@drawable/arrow" />
</RelativeLayout>
使用
公共List 代替 公共ArrayList