我正在开发一个应用程序，用于从Web服务获取一些数据并将它们显示到列表视图中。它运作正常。现在我在我的应用程序中包含了一个导航抽屉。首先，用户必须登录。之后，它将进入导航抽屉出现的主屏幕。我不知道碎片，但不知怎的，我已经实现了它来处理导航抽屉上的点击事件。在我的第一次尝试中，我无法使用我的应用程序[包括导航抽屉后]正确处理点击事件。但不知怎的，我也做到了..
我的问题是，当我点击片段中的一个按钮时，它会转到正确的活动，但是当我按下它时，它不会转到我之前可用的导航抽屉片段。
我该如何处理？
以下是我的代码：
public class NavHomeFragment extends Fragment {
public static String url ="my url;
// public static String url ="my url";
public static String confirm;
static String firstName;
public static String ActualImage;
static final String TAG_DATA = "d";
static final String TAG_OBJ_1 = "Appointment";
static final String TAG_OBJ_2 = "PatientProfile";
static final String TAG_PROP_FNAME = "FirstName";
static final String TAG_PROP_LNAME = "LastName";
static final String TAG_STIME = "StartTime";
static final String TAG_ETIME = "EndTime";
static final String TAG_DATE = "Date";
static final String TAG_HID = "PatientPersonId";
static final String TAG_HIDApp = "AppointmentId";
static final String TAG_IMG = "ImageURL";
public static ArrayList<HashMap<String, String>> oslist;
JSONArray androids = null;
JSONObject duplicate;
public static JSONArray dupArray;
public JSONArray getJsonArray() {
return dupArray;
}
public NavHomeFragment()
{
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
oslist = new ArrayList<HashMap<String, String>>();
View rootView = inflater.inflate(R.layout.vardle_home, container, false);
TextView tx = (TextView) rootView.findViewById(R.id.txtrequestCount);
tx.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
if(MotionEvent.ACTION_UP == event.getAction()){
//Home hm = new Home();
new JSONParse().execute();
// Toast.makeText(getActivity(), "Hello", Toast.LENGTH_LONG).show();
}
return false;
}
});
return rootView;
}
public class JSONParse extends AsyncTask<String, String, JSONObject> {
private ProgressDialog pDialog;
public JSONParse(){
}
@Override
protected void onPreExecute() {
super.onPreExecute();
/*fname = (TextView)findViewById(R.id.fname);
lname = (TextView)findViewById(R.id.lname);
stime = (TextView)findViewById(R.id.stime);
etime = (TextView)findViewById(R.id.etime);
date = (TextView)findViewById(R.id.blank);*/
pDialog = new ProgressDialog(getActivity());
pDialog.setMessage("Getting Data ...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
@Override
public JSONObject doInBackground(String... arg0) {
// TODO Auto-generated method stub
JsonParser jParser = new JsonParser();
// Getting JSON from URL
JSONObject json = null;
try {
JSONObject parm = new JSONObject();
//parm.put("PersonID", confirm);
parm.put("caregiverPersonId", MainActivity.confirm);
json = jParser.getJSONFromUrl(parm,url);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
//Toast.makeText(getApplicationContext(), "Hi "+firstName+"You Don't Have Any Requests!", Toast.LENGTH_LONG).show();
}
return json;
}
@Override
public void onPostExecute(JSONObject json) {
// TODO Auto-generated method stub
// String imgUrl = null;
try {
// Getting JSON Array from URL
//JSONObject jobs = json.getJSONObject(TAG_DATA);
String emptyjson = json.getString(TAG_DATA);
if(emptyjson.equals("[]")){
startActivity(new Intent(getActivity(),Empty.class));
}
else
{
androids = json.getJSONArray(TAG_DATA);
//JSONObject appt= new JSONObject(json.getString("d"));
for(int i = 0; i < androids.length(); i++){
ActualImage = "null";
JSONObject c = androids.getJSONObject(i);
// Storing JSON item in a Variable
JSONObject toHid = c.getJSONObject(TAG_OBJ_1);
String Hid = toHid.getString(TAG_HID);
JSONObject job = c.getJSONObject(TAG_OBJ_2);
String url = job.getString("ImageURL");
//String url = "null";
if(!url.equalsIgnoreCase("null")){
if(!url.equalsIgnoreCase("") ) {
String newUrl = url.substring(3);
ActualImage = "http://vardle.paragoncmb.com"+newUrl;
// ActualImage = "http://qa.vardle.com"+newUrl;
}
}
else{
ActualImage = null;
}
firstName = job.getString(TAG_PROP_FNAME);
String lastName = job.getString(TAG_PROP_LNAME);
JSONObject job_two = c.getJSONObject(TAG_OBJ_1).getJSONObject("DayTimeSlot");
String start = job_two.getString(TAG_STIME );
String end = job_two.getString(TAG_ETIME);
/* String ackwardDate = job_two.getString(TAG_DATE);;
Calendar calendar = Calendar.getInstance();
String ackwardRipOff = ackwardDate.replace("/Date(", "").replace(")/", "");
Long timeInMillis = Long.valueOf(ackwardRipOff);
calendar.setTimeInMillis(timeInMillis);
String theDate = (calendar.getTime().toGMTString());
*/
String Ldate = job_two.getString(TAG_DATE);
String ackwardRipOff = Ldate.replace("/Date(", "").replace(")/", "");
Long Ldat = Long.valueOf(ackwardRipOff);
Date date = new Date(Ldat);
String strdate = (String) DateFormat.format("MM/dd/yy", date);
//String date = dateConvert(Ldate);
//long Ldate = job_two.getLong("Date");
//String strdate = (String) DateFormat.format("MM/dd/yy h:mmaa", date);
JSONObject job_three = c.getJSONObject(TAG_OBJ_1);
String AppoinmentID = job_three.getString(TAG_HIDApp);
// Adding value HashMap key => value
HashMap<String, String> map = new HashMap<String, String>();
map.put(MainActivity.TAG_PROP_FNAME, firstName);
map.put(MainActivity.TAG_PROP_LNAME, lastName);
map.put(MainActivity.TAG_STIME , start);
map.put(MainActivity.TAG_ETIME, end);
map.put(MainActivity.TAG_DATE, strdate);
map.put(MainActivity.TAG_HID, Hid);
map.put("ImageURL", ActualImage);
map.put("AppointmentId", AppoinmentID);
oslist.add(map);
//duplicate = new JSONObject();
Intent reult = new Intent(getActivity(),ViewList.class);
//reult.putStringArrayListExtra("map", oslist);
//startActivity(reult);
reult.putExtra("arraylist", oslist);
startActivityForResult(reult, 500);
}
dupArray = new JSONArray();
dupArray.put(oslist);
}
} catch (JSONException e) {
e.printStackTrace();
//Intent reult = new Intent(MainActivity.this,ViewList.class);
//reult.putStringArrayListExtra("map", oslist);
// startActivity(reult);
}
pDialog.dismiss();
}
}
}
这是导航抽屉的类
public class NavigationActivity extends Activity{
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
private ActionBarDrawerToggle mDrawerToggle;
// nav drawer title
private CharSequence mDrawerTitle;
// used to store app title
private CharSequence mTitle;
// slide menu items
private String[] navMenuTitles;
private TypedArray navMenuIcons;
private ArrayList<NavDrawerItem> navDrawerItems;
private NavDrawerListAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.nav_list);
mTitle = mDrawerTitle = getTitle();
// load slide menu items
navMenuTitles = getResources().getStringArray(R.array.nav_drawer_items);
// nav drawer icons from resources
navMenuIcons = getResources()
.obtainTypedArray(R.array.nav_drawer_icons);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.list_slidermenu);
navDrawerItems = new ArrayList<NavDrawerItem>();
// adding nav drawer items to array
// Home
navDrawerItems.add(new NavDrawerItem(navMenuTitles[0], navMenuIcons.getResourceId(0, -1)));
// Find People
navDrawerItems.add(new NavDrawerItem(navMenuTitles[1], navMenuIcons.getResourceId(1, -1)));
// Photos
navDrawerItems.add(new NavDrawerItem(navMenuTitles[2], navMenuIcons.getResourceId(2, -1)));
// Communities, Will add a counter here
navDrawerItems.add(new NavDrawerItem(navMenuTitles[3], navMenuIcons.getResourceId(3, -1), true, "22"));
// Pages
navDrawerItems.add(new NavDrawerItem(navMenuTitles[4], navMenuIcons.getResourceId(4, -1)));
// What's hot, We will add a counter here
navDrawerItems.add(new NavDrawerItem(navMenuTitles[5], navMenuIcons.getResourceId(5, -1), true, "50+"));
// Recycle the typed array
navMenuIcons.recycle();
mDrawerList.setOnItemClickListener(new SlideMenuClickListener());
// setting the nav drawer list adapter
adapter = new NavDrawerListAdapter(getApplicationContext(),
navDrawerItems);
mDrawerList.setAdapter(adapter);
// enabling action bar app icon and behaving it as toggle button
getActionBar().setDisplayHomeAsUpEnabled(true);
getActionBar().setHomeButtonEnabled(true);
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
R.drawable.ic_drawer, //nav menu toggle icon
R.string.app_name, // nav drawer open - description for accessibility
R.string.app_name // nav drawer close - description for accessibility
) {
public void onDrawerClosed(View view) {
getActionBar().setTitle(mTitle);
// calling onPrepareOptionsMenu() to show action bar icons
invalidateOptionsMenu();
}
public void onDrawerOpened(View drawerView) {
getActionBar().setTitle(mDrawerTitle);
// calling onPrepareOptionsMenu() to hide action bar icons
invalidateOptionsMenu();
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
if (savedInstanceState == null) {
// on first time display view for first nav item
displayView(0);
}
}
/**
* Slide menu item click listener
* */
private class SlideMenuClickListener implements
ListView.OnItemClickListener {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
// display view for selected nav drawer item
displayView(position);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// toggle nav drawer on selecting action bar app icon/title
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
// Handle action bar actions click
switch (item.getItemId()) {
case R.id.action_settings:
return true;
default:
return super.onOptionsItemSelected(item);
}
}
/* *
* Called when invalidateOptionsMenu() is triggered
*/
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
// if nav drawer is opened, hide the action items
boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
menu.findItem(R.id.action_settings).setVisible(!drawerOpen);
return super.onPrepareOptionsMenu(menu);
}
/**
* Diplaying fragment view for selected nav drawer list item
* */
private void displayView(int position) {
// update the main content by replacing fragments
Fragment fragment = null;
switch (position) {
case 0:
fragment = new NavHomeFragment();
break;
case 1:
fragment = new FindPeopleFragment();
break;
/*case 2:
fragment = new PhotosFragment();
break;
case 3:
fragment = new CommunityFragment();
break;
case 4:
fragment = new PagesFragment();
break;
case 5:
fragment = new WhatsHotFragment();
break;*/
default:
break;
}
if (fragment != null) {
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.frame_container, fragment).commit();
// update selected item and title, then close the drawer
mDrawerList.setItemChecked(position, true);
mDrawerList.setSelection(position);
setTitle(navMenuTitles[position]);
mDrawerLayout.closeDrawer(mDrawerList);
} else {
// error in creating fragment
Log.e("MainActivity", "Error in creating fragment");
}
}
@Override
public void setTitle(CharSequence title) {
mTitle = title;
getActionBar().setTitle(mTitle);
}
/**
* When using the ActionBarDrawerToggle, you must call it during
* onPostCreate() and onConfigurationChanged()...
*/
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
mDrawerToggle.syncState();
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Pass any configuration change to the drawer toggls
mDrawerToggle.onConfigurationChanged(newConfig);
}
}
这是在单击片段上的按钮后运行的类。从视觉上来说它是列表视图。这里显示的数据是通过调用Web服务。
public class ViewList extends Activity {
private static final String TAG_VER = "ver";
private static final String TAG_NAME = "name";
private static final String TAG_API = "api";
ListView list;
NewsRowAdapter adapter;
ArrayList<HashMap<String, String>> arl;
ArrayList<HashMap<String, String>> empty;
public ViewList()
{
}
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
ActionBar actionBar = getActionBar();
actionBar.setDisplayHomeAsUpEnabled(true);
setContentView(R.layout.activity_main);
arl = (ArrayList<HashMap<String, String>>) getIntent().getSerializableExtra("arraylist");
list =(ListView)findViewById(R.id.list);
adapter = new NewsRowAdapter(getBaseContext(),ViewList.this, R.layout.row, arl);
/*if(adapter.getCount()!=0){
list.setAdapter(adapter);
}*/
/*else{
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Search is empty")
.setCancelable(true)
.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alert = builder.create();
}
*/
list.setAdapter(adapter);
// setListAdapter(adapter);
}
public void handleImage(String url,ImageView im){
if(url.equalsIgnoreCase("null")){
Bitmap bImage = BitmapFactory.decodeResource(getResources(), R.drawable.propic);
im.setImageBitmap(bImage);
}
}
@Override
public void onBackPressed() {
// TODO Auto-generated method stub
super.onBackPressed();
this.finishAffinity();
startActivity(new Intent(ViewList.this,NavHomeFragment.class));
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// TODO Auto-generated method stub
MenuInflater infl = getMenuInflater();
infl.inflate(R.menu.activity_main_actions, menu);
return super.onCreateOptionsMenu(menu);
}
}
请指导我实现这一目标。如果有人会用一些例子指导我，我会很高兴：）
答案 0 :(得分：0)
使用“FLAG_ACTIVITY_CLEAR_TOP”标记开始您的活动。
Intent intent = new Intent(this,ViewList.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);