こんにちは私はフィードをダウンロードするアプリを持っていて、JSONそれが脚の長いものになり始めていますAsyncTaskを使用する必要があることは知っていますが、それをコードに統合する方法がわかりません。
これまでの私の元のコードはここにあります
public class HomeActivity extends ListActivity {
private MergeAdapter adapter=null;
private ArrayAdapter<String> arrayAdapter=null;
private ArrayAdapter<String> arrayAdapter2=null;
private LazyAdapter arrayAdapter3=null;
private static final String apiKey = "7668hhf74hhd3dhhs";
private static final String apiUser = "androiduser";
private static String ChosenLeagueID = null;
private static String ChosenMethod = null;
private static String ChosenTeamId = null;
public String fulldata = null;
public String newsFeedRequest = null;
public String newsFeedURL = null;
public String resultsFeedURL = null;
public String lastMonth = null;
public String HomeTeam = null;
public String AwayTeam = null;
public String HomeScore = null;
public String AwayScore = null;
public String Attendance = null;
public String Division = null;
public String HomeScorers = null;
public String AwayScorers = null;
public String resultsFeedRequest = null;
public String chosenLeagueId = "40";
public List<String> newsList = null;
public List<String> newsList2 = null;
public List<String> newsList3 = null;
public List<String> imageList = null;
public JSONObject resultsDict = null;
public View resultsView = null;
public int newsAmount = 0;
long unixTimeStamp = System.currentTimeMillis() / 1000L;
//add Time Stamp to URL
//public String chosenMethod;
public class PostTask extends AsyncTask<Void, String, Boolean> {
@Override
protected Boolean doInBackground(Void... params) {
boolean result = false;
checkPreferences();
publishProgress("progress");
return result;
}
protected void onProgressUpdate(String... progress) {
StringBuilder str = new StringBuilder();
for (int i = 1; i < progress.length; i++) {
str.append(progress[i] + " ");
}
}
}
static String buildHmacSignature(String pKey, String pStringToSign)
{
String lSignature = "None";
try
{
Mac lMac = Mac.getInstance("HmacSHA256");
SecretKeySpec lSecret = new SecretKeySpec(pKey.getBytes(), "HmacSHA256");
lMac.init(lSecret);
byte[] lDigest = lMac.doFinal(pStringToSign.getBytes());
BigInteger lHash = new BigInteger(1, lDigest);
lSignature = lHash.toString(16);
if ((lSignature.length() % 2) != 0) {
lSignature = "0" + lSignature;
}
}
catch (NoSuchAlgorithmException lEx)
{
throw new RuntimeException("Problems calculating HMAC", lEx);
}
catch (InvalidKeyException lEx)
{
throw new RuntimeException("Problems calculating HMAC", lEx);
}
return lSignature;
}
public void checkPreferences(){
SharedPreferences preferences = getSharedPreferences("prefs", Context.MODE_PRIVATE);
ChosenMethod = preferences.getString("ChosenMethod", ChosenMethod);
ChosenLeagueID = preferences.getString("ChosenLeagueId", ChosenLeagueID);
ChosenTeamId = preferences.getString("ChosenTeamId", ChosenTeamId);
Log.v("lc", "newsurl" + newsFeedURL);
Log.v("myapp", "ChosenMethod Home = " + ChosenMethod);
Log.v("myapp", "ChosenLeagueID Home = " + ChosenLeagueID);
Log.v("myapp", "ChosenTeamID Home = " + ChosenTeamId);
if (ChosenMethod.equals("Team")) {
setContentView(R.layout.homeactteam2);
newsAmount = 5;
loadData();
} else {
setContentView(R.layout.homeact);
newsAmount = 10;
loadDataLeague();
}
}
public void loadresults(){
resultsFeedRequest = "1.0/league-website/" + chosenLeagueId + "/results?&team_id=" + ChosenTeamId + "&limit=31×tamp=" + unixTimeStamp;
resultsFeedURL = "https://www.website.com/_services/api/" + resultsFeedRequest;
String myhash = buildHmacSignature(apiKey, resultsFeedURL);
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost(resultsFeedURL);
List<NameValuePair> pairs = new ArrayList<NameValuePair>();
pairs.add(new BasicNameValuePair("requestToken", myhash));
pairs.add(new BasicNameValuePair("apiUser", apiUser));
try {
post.setEntity (new UrlEncodedFormEntity(pairs));
HttpResponse response = client.execute(post);
BufferedReader reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent(), "UTF-8"));
String json = reader.readLine();
fulldata = String.valueOf(json);
Log.v("myApp","resultsdata" + fulldata);
newsList = new ArrayList<String>();
newsList2 = new ArrayList<String>();
newsList3 = new ArrayList<String>();
imageList = new ArrayList<String>();
JSONObject obj = new JSONObject(json);
JSONObject objData = obj.getJSONObject("data");
JSONArray jArray = objData.getJSONArray("results");
if(jArray.length() < 1){
loadLastResults();
}else{
Log.v("lc", "this month has results");
}
//
// for(int t = 0; t < newsAmount; t++){
// JSONObject newsTitleDict = jArray.getJSONObject(t);
// imageList.add(newsTitleDict.getString("image_small"));
// newsList3.add(newsTitleDict.getString("title"));
//
// }
//
// for(int t = 0; t < 1; t++){
// JSONObject newsTitleDict = jArray.getJSONObject(t);
//
// newsList.add(newsTitleDict.getString("title"));
// newsList2.add(newsTitleDict.getString("title"));
//
// }
//
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void loadLastResults(){
resultsFeedRequest = "1.0/league-website/" + chosenLeagueId + "/results?month=04&team_id=" + ChosenTeamId + "&limit=31×tamp=" + unixTimeStamp;
resultsFeedURL = "https://www.website.com/_services/api/" + resultsFeedRequest;
String myhash = buildHmacSignature(apiKey, resultsFeedURL);
Date anotherCurDate = new Date();
SimpleDateFormat formatter = new SimpleDateFormat("MM");
String CurMonth = formatter.format(anotherCurDate);
int Int = Integer.parseInt(CurMonth);
int MonthInt = Int -1;
CurMonth = (String) (String.valueOf(MonthInt));
if (CurMonth.equals("1")){
lastMonth = "12";
}
else {
if(CurMonth.length() < 2){
lastMonth = "0" + CurMonth;
} else {
lastMonth = CurMonth;
}
}
Log.v("lc","month= " + CurMonth);
Log.v("lc","LastMonth= " + lastMonth);
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost(resultsFeedURL);
List<NameValuePair> pairs = new ArrayList<NameValuePair>();
pairs.add(new BasicNameValuePair("requestToken", myhash));
pairs.add(new BasicNameValuePair("apiUser", apiUser));
try {
post.setEntity (new UrlEncodedFormEntity(pairs));
HttpResponse response = client.execute(post);
BufferedReader reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent(), "UTF-8"));
String json = reader.readLine();
fulldata = String.valueOf(json);
Log.v("myApp","resultsdata" + fulldata);
newsList = new ArrayList<String>();
newsList2 = new ArrayList<String>();
newsList3 = new ArrayList<String>();
imageList = new ArrayList<String>();
JSONObject obj = new JSONObject(json);
JSONObject objData = obj.getJSONObject("data");
JSONArray jArray = objData.getJSONArray("results");
for(int t = 0; t < 1; t++){
resultsDict = jArray.getJSONObject(t);
HomeTeam = resultsDict.getString("hometeam");
AwayTeam = resultsDict.getString("awayteam");
HomeScore = resultsDict.getString("homescore");
AwayScore = resultsDict.getString("awayscore");
Attendance = resultsDict.getString("attendance");
Division = resultsDict.getString("division");
Log.v("lc","hometeam" + HomeTeam);
Log.v("lc","awayteam" + AwayTeam);
}
resultsView = LayoutInflater.from(getBaseContext()).inflate(R.layout.resultscell,
null);
TextView homeTeam = (TextView) resultsView.findViewById(R.id.HomeTeam);
homeTeam.setText(HomeTeam);
TextView awayTeam = (TextView) resultsView.findViewById(R.id.AwayTeam);
awayTeam.setText(AwayTeam);
TextView homeScore = (TextView) resultsView.findViewById(R.id.HomeScore);
homeScore.setText(HomeScore);
TextView awayScore = (TextView) resultsView.findViewById(R.id.AwayScore);
awayScore.setText(AwayScore);
TextView attendance = (TextView) resultsView.findViewById(R.id.Attendence);
attendance.setText("Att:" + Attendance);
TextView division = (TextView) resultsView.findViewById(R.id.Division);
division.setText(Division);
Log.v("lc", "resultsDict" + resultsDict);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void loadnews(){
newsFeedRequest = "1.0/league-website/" + chosenLeagueId + "/news?timestamp=" + unixTimeStamp;
newsFeedURL = "https://www.website.com/_services/api/" + newsFeedRequest;
String myhash = buildHmacSignature(apiKey, newsFeedURL);
Log.v("lc" , "resultsurl=" + resultsFeedURL);
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost(newsFeedURL);
List<NameValuePair> pairs = new ArrayList<NameValuePair>();
pairs.add(new BasicNameValuePair("requestToken", myhash));
pairs.add(new BasicNameValuePair("apiUser", apiUser));
try {
post.setEntity (new UrlEncodedFormEntity(pairs));
HttpResponse response = client.execute(post);
BufferedReader reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent(), "UTF-8"));
String json = reader.readLine();
fulldata = String.valueOf(json);
Log.v("myApp","newsdata" + fulldata);
newsList = new ArrayList<String>();
newsList2 = new ArrayList<String>();
newsList3 = new ArrayList<String>();
imageList = new ArrayList<String>();
JSONObject obj = new JSONObject(json);
JSONObject objData = obj.getJSONObject("data");
JSONArray jArray = objData.getJSONArray("news");
Log.v("lc","newsAmount= " + newsAmount);
for(int t = 0; t < newsAmount; t++){
JSONObject newsTitleDict = jArray.getJSONObject(t);
imageList.add(newsTitleDict.getString("image_small"));
newsList3.add(newsTitleDict.getString("title"));
}
for(int t = 0; t < 1; t++){
JSONObject newsTitleDict = jArray.getJSONObject(t);
newsList.add(newsTitleDict.getString("title"));
// newsList2.add(newsTitleDict.getString("title"));
}
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void mergeAdapterSetup(){
arrayAdapter = new ArrayAdapter<String>(this, R.layout.single_item, newsList);
arrayAdapter2 = new ArrayAdapter<String>(this, R.layout.resultscell, newsList2);
//arrayAdapter3 = new ArrayAdapter(this, R.layout.complex_item, newsList3);
String[] mStrings = (String[]) imageList.toArray(new String[imageList.size()]);
String[] news = (String[]) newsList3.toArray(new String[newsList3.size()]);
arrayAdapter3 = new LazyAdapter(this, mStrings, news);
ListView list = getListView();
list.setTextFilterEnabled(true);
LayoutInflater inflater = (LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE );
View header = inflater.inflate( R.layout.homeheader, list, false);
View header2 = inflater.inflate( R.layout.homeheader2, list, false);
View header3 = inflater.inflate( R.layout.homeheader3, list, false);
//setListAdapter (arrayAdapter);
adapter = new MergeAdapter();
adapter.addView(header);
adapter.addAdapter(arrayAdapter);
adapter.addView(header2);
adapter.addView(resultsView);
adapter.addView(header3);
adapter.addAdapter(arrayAdapter3);
setListAdapter(adapter);
}
public void loadDataLeague(){
String myhash = buildHmacSignature(apiKey, newsFeedURL);
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost(newsFeedURL);
List<NameValuePair> pairs = new ArrayList<NameValuePair>();
pairs.add(new BasicNameValuePair("requestToken", myhash));
pairs.add(new BasicNameValuePair("apiUser", apiUser));
try {
post.setEntity (new UrlEncodedFormEntity(pairs));
HttpResponse response = client.execute(post);
BufferedReader reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent(), "UTF-8"));
String json = reader.readLine();
fulldata = String.valueOf(json);
Log.v("myApp","newsdata" + fulldata);
newsList = new ArrayList<String>();
newsList2 = new ArrayList<String>();
newsList3 = new ArrayList<String>();
imageList = new ArrayList<String>();
JSONObject obj = new JSONObject(json);
JSONObject objData = obj.getJSONObject("data");
JSONArray jArray = objData.getJSONArray("news");
Log.v("lc","newsAmount= " + newsAmount);
for(int t = 0; t < newsAmount; t++){
JSONObject newsTitleDict = jArray.getJSONObject(t);
imageList.add(newsTitleDict.getString("image_small"));
newsList3.add(newsTitleDict.getString("title"));
}
for(int t = 0; t < 1; t++){
JSONObject newsTitleDict = jArray.getJSONObject(t);
newsList.add(newsTitleDict.getString("title"));
newsList2.add(newsTitleDict.getString("title"));
}
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
arrayAdapter = new ArrayAdapter<String>(this, R.layout.single_item, newsList);
arrayAdapter2 = new ArrayAdapter<String>(this, R.layout.single_item, newsList2);
//arrayAdapter3 = new ArrayAdapter(this, R.layout.complex_item, newsList3);
String[] mStrings = (String[]) imageList.toArray(new String[imageList.size()]);
String[] news = (String[]) newsList3.toArray(new String[newsList3.size()]);
arrayAdapter3 = new LazyAdapter(this, mStrings, news);
ListView list = getListView();
list.setTextFilterEnabled(true);
LayoutInflater inflater = (LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE );
View header3 = inflater.inflate( R.layout.homeheader3, list, false);
//setListAdapter (arrayAdapter);
adapter = new MergeAdapter();
adapter.addView(header3);
adapter.addAdapter(arrayAdapter3);
setListAdapter(adapter);
}
public void loadData(){
loadresults();
loadnews();
mergeAdapterSetup();
}
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
PostTask jsontask;
jsontask = new PostTask();
jsontask.execute();
Button backbtn = (Button) findViewById(R.id.backbtn);
//Listening to button event
backbtn.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
//Starting a new Intent
Intent previousScreen = new Intent(getApplicationContext(), ChooseTeamActivity.class);
ChosenMethod = "null";
SharedPreferences preferences = getSharedPreferences("prefs", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = preferences.edit();
editor.putString("ChosenMethod", ChosenMethod);
editor.commit();
previousScreen.putExtra("FullData", fulldata);
startActivity(previousScreen);
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == R.id.home) {
startActivity(new Intent(HomeActivity.this, HomeActivity.class));
return(true);
}
if (item.getItemId() == R.id.match) {
startActivity(new Intent(HomeActivity.this, MatchActivity.class));
return(true);
}
if (item.getItemId() == R.id.teams) {
startActivity(new Intent(HomeActivity.this, TeamsActivity.class));
return(true);
}
if (item.getItemId() == R.id.twitter) {
startActivity(new Intent(HomeActivity.this, TwitterActivity.class));
return(true);
}
if (item.getItemId() == R.id.info) {
startActivity(new Intent(HomeActivity.this, InfoActivity.class));
return(true);
}
return(super.onOptionsItemSelected(item));
}
}
エラー
java.lang.NullPointerException
06-07 12:56:34.338: E/AndroidRuntime(2688): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1821)
06-07 12:56:34.338: E/AndroidRuntime(2688): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1842)
06-07 12:56:34.338: E/AndroidRuntime(2688): at android.app.ActivityThread.access$1500(ActivityThread.java:132)
06-07 12:56:34.338: E/AndroidRuntime(2688): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1038)
06-07 12:56:34.338: E/AndroidRuntime(2688): at android.os.Handler.dispatchMessage(Handler.java:99)
06-07 12:56:34.338: E/AndroidRuntime(2688): at android.os.Looper.loop(Looper.java:143)
06-07 12:56:34.338: E/AndroidRuntime(2688): at android.app.ActivityThread.main(ActivityThread.java:4263)
06-07 12:56:34.338: E/AndroidRuntime(2688): at java.lang.reflect.Method.invokeNative(Native Method)
06-07 12:56:34.338: E/AndroidRuntime(2688): at java.lang.reflect.Method.invoke(Method.java:507)
06-07 12:56:34.338: E/AndroidRuntime(2688): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
06-07 12:56:34.338: E/AndroidRuntime(2688): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
06-07 12:56:34.338: E/AndroidRuntime(2688): at dalvik.system.NativeStart.main(Native Method)
06-07 12:56:34.338: E/AndroidRuntime(2688): Caused by: java.lang.NullPointerException
06-07 12:56:34.338: E/AndroidRuntime(2688): at HomeActivity.onCreate(HomeActivity.java:637)
06-07 12:56:34.338: E/AndroidRuntime(2688): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1072)
06-07 12:56:34.338: E/AndroidRuntime(2688): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1785)