Develop Reference

how to add the loading screen in to tab in android?

In my application i'm using two tabs one tab app contacts and other one is all contacts ,in application opening a one tab to other one it tack 10sce ,in that time how to add the same type of message like loading screen etc ,
plz tell me how to do that in my android app?
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.tabview);
final TabHost tabHost = getTabHost();
TextView txtTab = new TextView(this);
txtTab.setText("Mobell Contacts");
txtTab.setPadding(8, 9, 8, 9);
txtTab.setTextColor(Color.WHITE);
txtTab.setTextSize(14);
//txtTab.setTypeface(localTypeface1);
txtTab.setGravity(Gravity.CENTER_HORIZONTAL | Gravity.CENTER_VERTICAL);
TabHost.TabSpec spec;
// Initialize a TabSpec for each tab and add it to the TabHost
spec = tabHost.newTabSpec("tab1").setIndicator(txtTab).setContent(new Intent(this, ContactList.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
tabHost.addTab(spec);
TextView txtTab1 = new TextView(this);
txtTab1.setText("All Contacts");
txtTab1.setPadding(8, 9, 8, 9);
txtTab1.setTextColor(Color.WHITE);
txtTab1.setTextSize(14);
//txtTab.setTypeface(localTypeface1);
txtTab1.setGravity(Gravity.CENTER_HORIZONTAL | Gravity.CENTER_VERTICAL);
TabHost.TabSpec spec1;
// Initialize a TabSpec for each tab and add it to the TabHost
spec1 = tabHost.newTabSpec("Tab2").setIndicator(txtTab1).setContent(new Intent(this, TabAct2.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
tabHost.addTab(spec1);
tabHost.getTabWidget().getChildAt(0).setBackgroundColor(Color.parseColor("#101010"));
tabHost.getTabWidget().getChildAt(1).setBackgroundColor(Color.parseColor("#848284"));
tabHost.setOnTabChangedListener(new OnTabChangeListener() {
#Override
public void onTabChanged(String tabId) {
for(int i=0;i<tabHost.getTabWidget().getChildCount();i++)
{
tabHost.getTabWidget().getChildAt(i).setBackgroundColor(Color.parseColor("#848284"));
}
tabHost.getTabWidget().getChildAt(tabHost.getCurrentTab()).setBackgroundColor(Color.parseColor("#181418"));
}
});
}
}
see this code plz tell how to add the progressDialog when tab change one to other...

You can do something like this for showing progress -
public class MainActivity extends Activity {
Button b;
ProgressBar pb1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
b = (Button)findViewById(R.id.button1);
pb1 = (ProgressBar)findViewById(R.id.progressBar1);
}
public void click(View v){
new Thread("thread1"){
public void run(){
try{
for(int i=0; i<10; i++)
{
Thread.sleep(4000);
pb1.setProgress(i*10);
}
}
catch(InterruptedException e){
e.printStackTrace();
}
};
}.start();
}
}
In case you want to show a message, use Spinner.

Show progressbar on center of screen using visibility on/off

Since you are using TabActivity (and you haven't posted your work around yet), so, I am guessing you have used
TabActivity
Activity (for both tabs)
Now, when you switch from one tab to another you are actually calling Activity. So, just create an AsyncTask in the Activity which takes time to load. For instance,
class ContactLoadAsync extends AsyncTask<Void, Void, Void> {
ProgressDialog pd;
#Override
protected void onPreExecute()
pd = ProgressDialog.show(YourActivity.this, "title", "loading", true, false);
}
#Override
protected Void doInBackground(Void... params) {
// call your contact loading functions here
return null;
}
#Override
protected void onPostExecute(Void result) {
pd.dismiss();
}
}
And, call this AsyncTask in onCreate() of your Activity.
new ContactLoadAsync().execute();

Want to exit the application on click of tab

I am making an application where i have set two bottom tabs,
namely "Exit" and "Back".
Now i want to exit from the application on the click of the "Exit" tab(not button).
How can i do that, i know that in android we can never actually close the application, but i want to go to the Home-screen on clicking "exit".
i have studied following link also along with other links
Is quitting an application frowned upon?
EDIT
public class Man_age_ur_PhoneActivity extends TabActivity {
/** Called when the activity is first created. */
ListView listview;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.homepage);
setTabs();
}
private void setTabs()
{
addTab("Exit", R.drawable.tab_exit);
addTab("Back", R.drawable.tab_back);
//To add more tabs just use addTab() method here like previous line.
}
private void addTab(String labelId, int drawableId)
{
TabHost tabHost = getTabHost();
// Intent intent = new Intent(this, c);
TabHost.TabSpec spec = tabHost.newTabSpec("" + labelId);
View tabIndicator = LayoutInflater.from(this).inflate(R.layout.tab_indicator, getTabWidget(), false);
TextView title = (TextView) tabIndicator.findViewById(R.id.title);
title.setText(labelId);
ImageView icon = (ImageView) tabIndicator.findViewById(R.id.icon);
icon.setImageResource(drawableId);
spec.setIndicator(tabIndicator);
// spec.setContent(intent);
tabHost.addTab(spec);
}
}

on Click of your second tab , you just have to write "finish();". This will close previously opened activities and you can exit from your application.

you can use this code
public class Man_age_ur_PhoneActivity extends TabActivity {
/** Called when the activity is first created. */
ListView listview;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.homepage);
setTabs();
getTabHost().setOnTabChangedListener(new OnTabChangeListener() {
#Override
public void onTabChanged(String tabId) {
int i = getTabHost().getCurrentTab();
Log.i("######## ANN CLICK TAB NUMBER", "------" + i);
if (i == 0) {
Log.i("########## Inside onClick tab 0", "onClick tab");
}
else if (i ==1) {
Log.i("########## Inside onClick tab 1", "onClick tab");
}
}
});
}
private void setTabs()
{
addTab("Exit", R.drawable.tab_exit);
addTab("Back", R.drawable.tab_back);
//To add more tabs just use addTab() method here like previous line.
}
private void addTab(String labelId, int drawableId)
{
TabHost tabHost = getTabHost();
// Intent intent = new Intent(this, c);
TabHost.TabSpec spec = tabHost.newTabSpec("" + labelId);
View tabIndicator = LayoutInflater.from(this).inflate(R.layout.tab_indicator, getTabWidget(), false);
TextView title = (TextView) tabIndicator.findViewById(R.id.title);
title.setText(labelId);
ImageView icon = (ImageView) tabIndicator.findViewById(R.id.icon);
icon.setImageResource(drawableId);
spec.setIndicator(tabIndicator);
// spec.setContent(intent);
tabHost.addTab(spec);
}
}
Also import this
import android.widget.TabHost;
import android.widget.TabHost.OnTabChangeListener;
Taken from this link
Android TabWidget detect click on current tab

Generally Android apps shouldn't have an exit option, see for instance this post: http://blog.radioactiveyak.com/2010/05/when-to-include-exit-button-in-android.html
If you really want to, you can also just call System.exit(), this is guaranteed to close down the application completely.

Change tab host intent

I am working on an application that pulls information from the internet. The information is sorted into categories, sub-categories and, sub-sub-categories.
My main view is a TabHost view (the parent categories) with 3 tabs, and the initial list view (the sub-categories). When the user clicks an item in the list view it calls a new list view that displays the child-categories of the chosen sub-category.
I got everything to work except that when a sub category is chosen the tabHost view disappears and the sub-sub-categories are displayed in full screen.
How can I change the intent of the tab to display the child-categories of the sub-category?
EDIT: here is my code, sorry I didn't post it earlier!
My Main view which contains the tabhost:
public class tabwidget extends TabActivity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.tabs);
Resources res = getResources(); // Resource object to get Drawables
TabHost tabHost = getTabHost(); // The activity TabHost
TabHost.TabSpec spec; // Resusable TabSpec for each tab
Intent intent; // Reusable Intent for each tab
// Create an Intent to launch an Activity for the tab (to be reused)
intent = new Intent().setClass(this, category1Activity.class);
// Initialize a TabSpec for each tab and add it to the TabHost
spec = tabHost.newTabSpec("category1").setIndicator("Category1",
res.getDrawable(R.drawable.ic_tab_category1))
.setContent(intent);
tabHost.addTab(spec);
// Do the same for the other tabs
intent = new Intent().setClass(this, category2Activity.class);
spec = tabHost.newTabSpec("category2").setIndicator("Category2",
res.getDrawable(R.drawable.ic_tab_category2))
.setContent(intent);
tabHost.addTab(spec);
intent = new Intent().setClass(this, category3Activity.class);
spec = tabHost.newTabSpec("category3").setIndicator("Category3",
res.getDrawable(R.drawable.ic_tab_category3))
.setContent(intent);
tabHost.addTab(spec);
tabHost.setCurrentTab(0);
}
When the application is started the alcohol tab is selected by default. This is the category1Acitivity listview with the onlclick action that calls the child-categories:
listView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//Toast.makeText(getApplicationContext(), "You clicked item at position"+position,
//Toast.LENGTH_SHORT).show();
Toast.makeText(getApplicationContext(), "Loading "+((TextView) view.findViewById(R.id.categoryname)).getText(),
Toast.LENGTH_SHORT).show();
Intent i = new Intent(category1Activity.this, subCategoryActivity.class);
i.putExtra("id", ((TextView) view.findViewById(R.id.message)).getText());
i.putExtra("catname", ((TextView) view.findViewById(R.id.categoryname)).getText());
i.putExtra("parentcatid", "0");
startActivityForResult(i, ACTIVITY_CREATE);
}
});
The listviews are generated by the category Id which is sent to the server pulls results from the database.

You will have to use ActivityGroups to do that.
http://ericharlow.blogspot.com/2010/09/experience-multiple-android-activities.html
http://united-coders.com/nico-heid/use-android-activitygroup-within-tabhost-to-show-different-activity
However, keep in mind that ActivityGroups are deprecated in ICS.
EDIT: This is my implementation of ActivityGroup:
Activity in a tab:
Intent i = new Intent(v.getContext(), SearchList.class);
i.putExtra("search", search);
View view = SearchActivityGroup.group.getLocalActivityManager()
.startActivity("SearchList", i
.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))
.getDecorView();
// Again, replace the view
SearchActivityGroup.group.replaceView(view);
ActivityGroup:
package nl.dante.SuperDeals;
import java.util.ArrayList;
import android.app.ActivityGroup;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
public class SearchActivityGroup extends ActivityGroup {
View rootView;
// Keep this in a static variable to make it accessible for all the nested
// activities, lets them manipulate the view
public static SearchActivityGroup group;
// Need to keep track of the history if you want the back-button to work
// properly, don't use this if your activities requires a lot of memory.
private ArrayList<View> history;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
/*
* this.history = new ArrayList<View>(); group = this;
*
* // Start the root activity within the group and get its view View
* view = getLocalActivityManager().startActivity("Search", new
* Intent(this,Search.class) .addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))
* .getDecorView();
*
* // Replace the view of this ActivityGroup replaceView(view);
*/
}
#Override
protected void onResume() {
super.onResume();
this.history = new ArrayList<View>();
group = this;
// Start the root activity within the group and get its view
View view = getLocalActivityManager().startActivity("Search", new Intent(this, Search.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)).getDecorView();
// Replace the view of this ActivityGroup
replaceView(view);
}
public void replaceView(View v) {
// Adds the old one to history
if (history.size() == 0) {
if (rootView != null) {
history.add(rootView);
rootView = null;
}
}
history.add(v);
// Changes this Groups View to the new View.
setContentView(v);
}
public void back() {
try {
if (history.size() > 0) {
if (history.size() == 1) {
rootView = history.get(0);
Toasts.ToastImageView(this, "Druk nogmaals BACK om af te sluiten", R.drawable.power_64_off, "red");
}
history.remove(history.size() - 1);
setContentView(history.get(history.size() - 1));
} else {
finish();
}
if (history.size() < 3) {
// Tabhost.bannerImage2.setImageResource(0);
Tabhost.banner.setBackgroundResource(R.drawable.gradient_blue);
}
if (history.size() == 2) {
Tabhost.bannerImage1.setImageResource(R.drawable.sorteer_btn);
}
} catch (Exception ex) {
}
}
public int getHistorySize() {
return history.size();
}
#Override
public void onBackPressed() {
try {
SearchActivityGroup.group.back();
} catch (Exception ex) {
}
return;
}
}

ActivityGroup inside TabHost does not show content after first run

I have issue with ActivityGroup. My app has 4 tabs, 2 of which has ActivityGroup and 2 more simple activity. The problem is that after first run of app content is shown properly, and when leave app through back button and return, tabs with activity group dont shown any content, including menus. While tabs with simple activity work properly.
D'you have any ideas?
Ok, some sort of code)
Setting this tab:
private TabSpec getFrontPageTab() {
Intent intent = new Intent(context, ActivityGroupHome.class);
return tabHost
.newTabSpec("home")
.setIndicator(
getTabView(R.drawable.tabbar_home, "str_home"))
.setContent(intent);
}
ActivityGroupHome:
public class ActivityGroupHome extends ActivityGroupBase {
#Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
ActivityUtils activityUtils = ActivityUtils.getInstance(this);
activityUtils.addActivityGroup("Home", this);
activityUtils.startHomeActivity("Home");
}
}
Methods from ActivityUtils:
public void startHomeActivity(String activityGroupName) {
if (activityGroupName != null) {
startHomeActivityForActivityGroup(activityGroupName);
} else {
Intent intent = new Intent(context, AsyncMainActivity.class);
// intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
context.startActivity(intent);
}
}
private void startHomeActivityForActivityGroup(String activityGroupName) {
ActivityGroupListItem activityGroupItem = activityGroups
.findGroupByName(activityGroupName);
if (activityGroupItem != null) {
Intent intent = new Intent(activityGroupItem.activityGroup,
AsyncMainActivity.class);
intent.putExtra(ACTIVITY_GROUP_NAME, activityGroupItem.name);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
View view = activityGroupItem.activityGroup
.getLocalActivityManager().startActivity("Home", intent)
.getDecorView();
activityGroupItem.activityGroup.setContentView(view);
activityGroupItem.stack.add("Home");
}
}

Android: Starting a new activity from TabHost disables onClick

I have a TabActivity with 4 tabs. When clicking on a button within one of the tabs and starting a new Activity (a new Activity not within the TabHost), the new Activity does not register OnClick(). The new Activity can't even show a Toast wich makes me think the TabHost is somehow blocking the ui?
When putting the Activity as one of the Tabs the OnClick works just fine.
Any ideas what the reason for this is?
I've included 3 classes:
1) The TabActivity
2) The Activity in a tab that starts:
3) The new Activity that cannot register OnClick()
1) TabActivity:
public class OverView extends TabActivity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_overview);
/** TabHost will have Tabs */
TabHost tabHost = (TabHost)findViewById(android.R.id.tabhost);
/** TabSpec used to create a new tab.
* By using TabSpec only we can able to setContent to the tab.
* By using TabSpec setIndicator() we can set name to tab. */
/** tid1 is firstTabSpec Id. Its used to access outside. */
TabSpec Search = tabHost.newTabSpec("tid1");
TabSpec AllArtists = tabHost.newTabSpec("tid1");
TabSpec Favorites = tabHost.newTabSpec("tid1");
TabSpec About = tabHost.newTabSpec("tid1");
/** TabSpec setIndicator() is used to set name for the tab. */
Search. setIndicator("Search");
AllArtists. setIndicator("AllArtists");
Favorites. setIndicator("Favorites");
About. setIndicator("About");
/** TabSpec setContent() is used to set content for a particular tab. */
Search.setContent (new Intent(this, Search.class));
AllArtists.setContent (new Intent(this, AllArtists.class));
Favorites.setContent (new Intent(this, Favorites.class));
About.setContent (new Intent(this, About.class));
/** Add tabSpec to the TabHost to display. */
tabHost.addTab(Search);
tabHost.addTab(AllArtists);
tabHost.addTab(Favorites);
tabHost.addTab(About);
}
}
2) AllArtists (The Activity within the tab. Clicking a list item starts a new Activity):
public class AllArtists extends Activity {
// Debug
private final String TAG = this.getClass().getSimpleName();
// XML
EditText searchBox;
ListView listView;
// Adapter
ListAdapter listAdapter;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_allartists);
listAdapter = new ListAdapter(this, null);
// XML
listView = (ListView)findViewById(R.id.allartists_listview);
searchBox = (EditText)findViewById(R.id.allartists_searchbox);
listView.setAdapter(listAdapter);
listView.setFastScrollEnabled(true);
listView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String memberID = (String)listAdapter.getID(position).toString();
if (!memberID.equals("HEADER")){
Log.d(TAG, "Jumping to Artists.class");
Intent intentArtist = new Intent (AllArtists.this, Artist.class);
intentArtist.putExtra("ID", memberID);
startActivity(intentArtist);
}
}
});
}
3) Artist (The new Activity started. This class does not register OnClick):
public class Artist extends Activity implements OnClickListener{
// Debug
private final String TAG = this.getClass().getSimpleName();
// XML
Button favorite_btn;
LinearLayout tel;
LinearLayout mob;
LinearLayout email;
LinearLayout www1;
LinearLayout www2;
LinearLayout add;
TextView name_tv;
TextView tel_tv;
TextView mob_tv;
TextView email_tv;
TextView www_tv1;
TextView www_tv2;
// Strings
String memberID;
String sirName;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_artist);
Toast.makeText(this, "OK, your in Activity_Artist..", Toast.LENGTH_SHORT);
// XML
favorite_btn = (Button)findViewById(R.id.artist_ib_favorite);
tel = (LinearLayout)findViewById(R.id.artist_tel_container);
mob = (LinearLayout)findViewById(R.id.artist_mob_container);
email = (LinearLayout)findViewById(R.id.artist_email_container);
www1 = (LinearLayout)findViewById(R.id.artist_www_container1);
www2 = (LinearLayout)findViewById(R.id.artist_www_container2);
add = (LinearLayout)findViewById(R.id.artist_add_container);
name_tv = (TextView)findViewById(R.id.artist_tv_name);
tel_tv = (TextView)findViewById(R.id.artist_tel_dynamic);
mob_tv = (TextView)findViewById(R.id.artist_mob_dynamic);
email_tv = (TextView)findViewById(R.id.artist_email_dynamic);
www_tv1 = (TextView)findViewById(R.id.artist_www_dynamic1);
www_tv2 = (TextView)findViewById(R.id.artist_www_dynamic2);
// OnClickListeners
favorite_btn.setOnClickListener(this);
tel.setOnClickListener(this);
mob.setOnClickListener(this);
email.setOnClickListener(this);
www1.setOnClickListener(this);
www2.setOnClickListener(this);
add.setOnClickListener(this);
// Code here to get memberID for fillContent()
}
private void fillContent(String memberID) throws JSONException {
// Code here to fill the TextViews etc with content from the DataBase.
}
#Override
public void onClick(View v) {
switch (v.getId()){
case R.id.artist_ib_favorite:
Toast.makeText(this, "onClick", Toast.LENGTH_SHORT);
Log.d(TAG, "Neo is attempting to insert member into favorites");
MyDB db = new MyDB(this);
db.insertFavorite(memberID, sirName);
break;
case R.id.artist_tel_container:
break;
case R.id.artist_mob_container:
Log.d(TAG, "OMG CLICKED THE MOBILE!");
break;
case R.id.artist_email_container:
break;
case R.id.artist_www_container1:
break;
case R.id.artist_add_container:
break;
}
}
Thanks ;)

For Toast you need to call show.
Toast.makeText(this, "OK, your in Activity_Artist..", Toast.LENGTH_SHORT).show();
For the click Operation on anything apart from Button you need to define
android:clickable="true"
in the layout.

Solved this. In the layout there was an (empty) GridView at the bottom of the layout set to android:layout_height="fill_parent" wich stole the touchevent.
The weird part about this is that when putting the exact same activity with the exact same XML inside a tab, the onClick() worked fine.