S'il vous plaît guider dans la classe suivante ce que je dois enregistrer dans.utilisation android onSaveInstanceState
S'il vous plaît me souviens que je suis en utilisant une seule chaîne qui est que je suis retriving de méthode getextra et il n'y a rien que je pense que je devrais stocker dans la suivant la méthode substituée.
protected void onSaveInstanceState(Bundle outState) {
// TODO Auto-generated method stub
super.onSaveInstanceState(outState);
}
Pouvez-vous me guider sur ce qu'il faut stocker dans la méthode d'instance onsave et quoi ne pas faire?
package com.wozzon.activity;
import java.util.ArrayList;
import org.json.JSONArray;
import org.json.JSONObject;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.Intent;
import android.graphics.Typeface;
import android.os.Bundle;
import android.text.Html;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.AdapterView.OnItemClickListener;
import com.wozzon.json.JSONService;
import com.wozzon.model.SearchCriteria;
import com.wozzon.pl.UIFactory;
import com.wozzon.util.Util;
import com.wozzon.util.WLConstants;
public class HomeBrowse extends Activity implements OnItemClickListener{
private final static String TAG = HomeBrowse.class.getSimpleName();
private ArrayList<BrowseRow> model=new ArrayList<BrowseRow>();
private BrowseAdapter adapter;
private ListView list;
private TextView browseTitle;
private TextView changeLink;
private SearchCriteria sc =SearchCriteria.getInstance();
private JSONArray jsonArray;
private ProgressDialog m_ProgressDialog = null;
private Runnable progressRunnable;
@Override
public void onCreate(Bundle savedInstanceState) {
try {
super.onCreate(savedInstanceState);
setContentView(R.layout.browse);
String errorMsg =Util.getExtraValue(getIntent().getExtras(), WLConstants.ERROR_MSG);
list =(ListView)findViewById(R.id.browse_cats);
if(errorMsg!= null){
UIFactory.displayAlert(new AlertDialog.Builder(HomeBrowse.this), "Status", errorMsg);
}
progressRunnable = new Runnable(){
@Override
public void run() {
try {
loadData();
} catch (Throwable e) {
Log.e(TAG, e.getMessage());
}
runOnUiThread(returnRes);
}
};
m_ProgressDialog = ProgressDialog.show(HomeBrowse.this,
"Please wait...", "Loading ...", true);
Thread thread = new Thread(progressRunnable);
thread.start();
} catch (Throwable e) {
Log.e(TAG, e.getMessage());
Util.handleError(HomeBrowse.this, HomeBrowse.class, e.getMessage());
//UIFactory.displayAlert(new AlertDialog.Builder(HomeBrowse.this), "Error Loading categories", e.getMessage());
}
}
private void loadData()throws Throwable{//loading object
jsonArray = JSONService.getJsonArray(getResources().getString(R.string.catJson));
}
private void fillResultRows(JSONArray jsonArray, BrowseAdapter adapter)throws Throwable{
BrowseRow br = null;
try {
for(int a=0; a<jsonArray.length(); a++){
JSONObject jsonObj = jsonArray.getJSONObject(a);
br = new BrowseRow();
br.name=jsonObj.getString("title");
br.image=jsonObj.getString("image");
br.searchType = jsonObj.getInt("searchType");
if(jsonObj.has("categoryIds")){
br.categoryIds = jsonObj.getString("categoryIds").replaceAll("-", ",");
}
if(jsonObj.has("subCategoryIds")){
br.subCategoryIds = jsonObj.getString("subCategoryIds").replaceAll("-", ",");
}
adapter.add(br);
}
} catch (Throwable e) {
throw e;
}
}
class BrowseAdapter extends ArrayAdapter<BrowseRow> {
BrowseAdapter() {
super(HomeBrowse.this, android.R.layout.simple_list_item_1, model);
}
public View getView(int position, View convertView,
ViewGroup parent) {
View row=convertView;
ResultWrapper wrapper=null;
if (row==null) {
LayoutInflater inflater=getLayoutInflater();
row=inflater.inflate(R.layout.browse_row, null);
wrapper=new ResultWrapper(row);
row.setTag(wrapper);
}
else {
wrapper=(ResultWrapper)row.getTag();
}
wrapper.populateFrom(model.get(position));
return(row);
}
}
class ResultWrapper {
private TextView name;
private String catIds="0";
private String subCatIds="0";
private ImageView image;
private int searchType;
private View row=null;
ResultWrapper(View row) {
this.row=row;
}
void populateFrom(BrowseRow r) {
getName().setText(r.name);
getIcon().setImageResource(getImageIcon(Integer.parseInt(r.image)));
catIds =r.categoryIds;
subCatIds = r.subCategoryIds;
searchType =r.searchType;
}
TextView getName() {
if (name==null) {
name=(TextView)row.findViewById(R.id.browse_row_name);
}
return name;
}
ImageView getIcon() {
if (image==null) {
image=(ImageView)row.findViewById(R.id.browse_row_icon);
}
return image;
}
}
private int getImageIcon(int catId){
int imageSource=R.drawable.all_cats;
switch(catId){
case WLConstants.CATEGORY_FILM: imageSource =R.drawable.film; break;
case WLConstants.CATEGORY_MUSIC: imageSource =R.drawable.music; break;
case WLConstants.CATEGORY_ARTS: imageSource =R.drawable.art; break;
case WLConstants.CATEGORY_KIDS: imageSource =R.drawable.museum; break;
case WLConstants.CATEGORY_GALLERY_MUSEUM: imageSource =R.drawable.kids; break;
case WLConstants.CATEGORY_COMEDY: imageSource =R.drawable.comedy; break;
case WLConstants.CATEGORY_NIGHT_CLUBS: imageSource =R.drawable.clubs; break;
case WLConstants.CATEGORY_ATTRACTION: imageSource =R.drawable.touristattractions; break;
case WLConstants.CATEGORY_VARIOUS_EVENTS: imageSource =R.drawable.all_cats; break;
case WLConstants.CATEGORY_ALL_FOOD_DRINK: imageSource =R.drawable.restaurants; break;
}
return imageSource;
}
@Override
public void onItemClick(AdapterView<?> adp, View view, int item, long arg3) {
try {
if("".equals(sc.getSearchLocation()) && (!(Util.locationFound(sc.getGeoLocation()) && sc.isUK()))){
UIFactory.displayAlert(new AlertDialog.Builder(HomeBrowse.this), "Error", "Please provide location");
return;
}
ResultWrapper wrap = (ResultWrapper)view.getTag();
sc.setCategoryIds(wrap.catIds);
sc.setSubCategoryIds(wrap.subCatIds);
sc.setSearchType(wrap.searchType);
goSearch();
} catch (Throwable e) {
Log.e(TAG, e.getMessage());
Util.handleError(HomeBrowse.this, HomeBrowse.class, e.getMessage());
//UIFactory.displayAlert(new AlertDialog.Builder(this), "Error", e.getMessage());
}
}
private void applyListener(){
list.setOnItemClickListener(this);
changeLink.setOnClickListener(onclickListener);
}
private final void goSearch(){
try {
sc.setSearchString("");
Intent mainIntent = new Intent(HomeBrowse.this,SearchResults.class);
startActivity(mainIntent);
} catch (Throwable e) {
Log.e(TAG, e.getMessage());
Util.handleError(HomeBrowse.this, HomeBrowse.class, e.getMessage());
}
}
public OnClickListener onclickListener = new OnClickListener(){
// @Override
public void onClick(View aView) {
try {
int componentId =aView.getId();
switch(componentId){
case R.id.tv_changeDateType:
Intent intent = new Intent(HomeBrowse.this,TimeLocationSettings.class);
startActivity(intent);
break;
}
} catch (Exception e) {
Log.e(TAG, e.getMessage());
Util.handleError(HomeBrowse.this, HomeBrowse.class, e.getMessage());
}
}
};
private void configComponents(){
String titleStr,location = "";
String dateCrtStr = Util.getDateCritieraStr(sc.getDateCriteria());
titleStr= dateCrtStr;
if(!"".equals(sc.getSearchLocation())){
location = sc.getSearchLocation();
}else if(sc.isNearMe()){
location="Near me";
}else{
location = "Postcode or town";
}
titleStr = titleStr + " - "+ location;
browseTitle.setText(titleStr);
changeLink.setTypeface(Typeface.DEFAULT, Typeface.BOLD);
}
public class BrowseRow {
private String name = "";
private String image = "";
private String categoryIds="0";
private String subCategoryIds="0";
private int searchType=1;
}
private Runnable returnRes = new Runnable() {
@Override
public void run() {
try {
browseTitle = (TextView)findViewById(R.id.browsePageTite);
changeLink = (TextView)findViewById(R.id.tv_changeDateType);
changeLink.setText(Html.fromHtml("<a href='#'>Change</a>"));
adapter=new BrowseAdapter();
applyListener();
configComponents();
fillResultRows(jsonArray, adapter);
if(jsonArray == null){
UIFactory.displayAlert(new AlertDialog.Builder(HomeBrowse.this), "Error", "Error Loading categories");
return;
}
list.setAdapter(adapter);
} catch (Throwable e) {
e.printStackTrace();
}
m_ProgressDialog.dismiss();
}
};
}
Il existe un bon exemple et une description de l'enregistrement et de la restauration de l'état d'instance dans le Bloc-notes Tutoriel, Exercice 3. Je suggère de lire ceci pour mieux comprendre ces concepts: http://developer.android.com /resources/tutorials/notepad/notepad-ex3.html –