I'm developing a Androidapplication and I want to be able to start an activity through a spinner value the user have selected.
As an example: In the main activity you'll see a spinner with the values "Color", "Animals". If you choose "Color" and click on a button called "Proceed", you will come to an activity that list different colors in a listview, but if you choose "Animal" from the spinner, you will come to the same activity, but this time it shows a listview of animals instead.
Can anybody give me a hint on how to do this?
(PS this is an example on how I want it to work, I actually need to call everything from a Web Service)
you can implement android.widget.AdapterView.OnItemSelectedListener and override the method
#Override
public void onItemSelected(AdapterView<?> parent, View view, int pos, long id)
{
// Call the following method to get the selected value of the spinner and perform your
//task to start your desired activity
String selectedValue=parent.getItemAtPosition(pos).toString();
if(selectedValue.equals("Colors"))
{
//do your task using color
}
else if(selectedValue.equals("Animal"))
{
//do your task using animal
}
}
#Override
public void onNothingSelected(AdapterView<?> parent)
{
//Do Nothing
}
The simplest Solution would be for example:
Spinner yourSpinner = (Spinner)view.findViewById(R.id.your_spinner);
String value = yourSpinner.getSelectedItem().toString();
if(value.equalsIgnoreCase("ANIMAL")){
Intent intent = new Intent(yourActivity.this, yourNextActivity.class);
intent.putExtra("VALUE", value);
startActivity(intent)
}
Then in that Activity that You want to start:
Intent intent = getIntent();
String value= intent.getStringExtra("VALUE");
if(value.equalsIgnoreCase("ANIMAL")){
//start the part with animals
}
Its really simple just use bundle and send the appropriate data to your next activity. A small sample would look like this:
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
String spinnerText = spinner.getSelectedItem().toString();
Intent intent = new Intent(A.this,B.class);
intent.putExtra("selection",spinnerText);
}
});
Then in your next activity get the sent text and manipulate accordingly.
Related
I am kind of new to Android development. Could you please tell me, how to navigate to another screen using onListItemClick. I have 200 items in a ListView. If i click an item from the ListView, it has to navigate to another screen which should show the details of the clicked item.
To get what you want you can do something like this...
1>create another activity with certains controls in which you can place your values...
2>on itemclick() of listview...
a>create intent and set values to pass to new activity
b>start new activity with this intent.
3>in oncreate() of new activity
a>retrive the values from intent
b>populate your controls using the values...
I am assuming you are getting the list and detail of actor from database.
I have used the same walk through to display recipe detail of selected recipe in my app.
public class ActorList extends Activity {
ListView myActorList=null;
public final static String selectedActor_ID="will Keep Actor ID";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_actor_list);
//initialize controls
myActorList.setAdapter(adapter);
myActorList.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View v,
int position, long id) {
// TODO Auto-generated method stub
Intent i= new Intent(ActorList.this,ActorDetail.class);
// you have to pass the actor id to next activity
// you can get this actor id from argument of type "long"
i.putExtra(selectedActor_ID, String.valueOf(id));
startActivity(i);
}
});
}
}
//Other Activity To show Detail..
//get the ID of Selected Actor on other activity say "ActorDetail"
public class ActorDetail extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_actor_detail);
ActorID=getIntent().getStringExtra(ActorList.selectedActor_ID);
// now as you have the id here for that particular actor
//fetch the detail of that selected actor thru id and bind it to your layout.
}
}
You need to register the other activity in Manifest file also like this
<activity
android:name=".otherscreenActivity"
</activity>
So I have images in gridview. These images are shown in an activity. When one of the images is clicked, new activity is started with this image. In this activity, If user inputs correct answer, new activity is started that indicates the answer is correct. After user inputs correct answer, I want to set this image more transparent with a check mark in gridwiew. If the user clicks again to this correct view, I want to show same activity which indicates it was solved correct. How can I do that?
Here is my activity which contains grid view:
public class LogoSelectionActivity extends Activity {
.
.
gridview.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
Intent intent = new Intent(LogoSelectionActivity.this, LogoActivity.class);
intent.putExtra ("clicked_position", position);
startActivity(intent);
}
Here is my activity where user enter inputs:
public class LogoActivity extends Activity{
EditText text;
Button check;
Boolean a;
int id;
Names name;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_logo);
check = (Button) findViewById(R.id.Check_button);
text = (EditText) findViewById(R.id.editText1);
ImageView view = (ImageView)findViewById(R.id.imageView1);
final ImageView incorrect = (ImageView)findViewById(R.id.incorrect);
switch (getIntent().getIntExtra ("clicked_position", -1))
{
case 0:
view.setImageResource(R.drawable.adese);
id = R.drawable.adese;
break;
case 1:
view.setImageResource(R.drawable.birvar);
id = R.drawable.birvar;
break;
case 2:
view.setImageResource(R.drawable.agaoglu);
break;
case 3:
view.setImageResource(R.drawable.akinsoft);
break;
default:
view.setImageResource(R.drawable.afra);
id = R.drawable.afra;
}
name = Names.forDrawable(id);
check.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
a=name.isCorrect(text.getText().toString());
if(a==true){
Intent intent = new Intent(LogoActivity.this, CorrectActivity.class);
startActivity(intent);
}
else{
incorrect.setVisibility(0);
incorrect.setVisibility(4);
}
}
});
}
}
I hope I could explain my intention clearly.
There are number of ways to do this. Because this is not problem this is functionality that you want in your project.
According to my logic I am giving you one solution.
Steps:
Create one static array with the length of your items in grid view with default value is 0.
static int[] items = {0,0,0,...};
Now check in getView methode of grid view with the value according to position in array that if it is 0 then it will looks like normal otherwise it will look with different (Here you want transparent with check box this will you get by adding one more image on it.)
If(items[position] == 0){
}else{
}
Now when user taps any image and navigate to other screen (Suppose Activity B) that time pass value of that position from that array and check in Activity B's OnCreate().
gridview.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
Intent intent = new Intent(LogoSelectionActivity.this, LogoActivity.class);
intent.putExtra ("clicked_position", position);
intent.putExtra ("answered_or_not", items[position]);
startActivity(intent);
}
And if answered means if its value is 1 then show accordingly other wise as it is.
And when it user give answer unanswered question make its value 1 in that array.
I hope it will help you can ask if any question.
I'm new to Android. I'm working on a listView-based app: you have a main menu, when you click an item, a new activity starts with another menu; when you click again, a new activity starts with the content you selected. Since I've quite a lot of menu items, I've to create a listener which handles all possible cases, so I've something similar:
#Override public void onItemClick(AdapterView<?> listAdapter, View v, int position, long id) {
String text = ((TextView)v).getText().toString();
//main menu
if (text.equals(K.getStringById(K.ID_MAIN_THEORY))) {
...
} else if (text.equals(K.getStringById(K.ID_MAIN_EXERCISE))) {
...
}
else if (text.equals(K.getStringById(K.ID_MAIN_TABLES))) {
...
}
//here other menus' items: lots of items
...
//back item
else if (text.equals(K.getStringById(K.ID_BACK))) {
activity.finish();
}
Intent i = new Intent(...);
startActivity(i);
}
* K is a class that holds ids' references
There's a way I can avoid hard-coding listener behavior?
** PS: the lists' TextViews don't render properly: text appears light grey, not black! O.o
It's more useful to use the position rather than the view to switch the action of the click event. Your ListView should be populated from some sort of List, therefore when the onClick fires, giving you the position, you can reference that position in the List to know what was clicked.
If you want to click on item and in result it goes to another activity, for example if you have three item and when you click on item A it will redirect you to activity A and if B then to B and so on,
lstview.setOnItemClickListener(new OnItemClickListener()
{
private String input;
public void onItemClick(AdapterView<?> v, View arg1, int index,long arg3)
{
if(index==1)
{
Intent intnt=new Intent(v.getContext(),A.class);
startActivity(intnt);
}
else if (index==2)
{
Intent intnt=new Intent(v.getContext(),B.class);
startActivity(intnt);
}
else
{
Intent intnt=new Intent(v.getContext(),C.class);
startActivity(intnt);
}
}
}
Here in this case you are going to different activities on selection the items in a list view, put your comments for further query.
I solved this way: I think it's pretty good.
//This in K class, where MAPPED_HIERARCHY is a static field
static void activity(android.app.Activity a) {
MAPPED_HIERARCHY = new HashMap<String, ArrayList<String>>();
MAPPED_HIERARCHY.put(a.getResources().getString(R.string.app_name), K.array2list(a.getResources().getStringArray(R.array.menu_main)));
MAPPED_HIERARCHY.put(a.getResources().getString(R.string.main_theory), K.array2list(a.getResources().getStringArray(R.array.menu_theory)));
MAPPED_HIERARCHY.put(a.getResources().getString(R.string.main_exercise), K.array2list(a.getResources().getStringArray(R.array.menu_exercise)));
....
}
static ArrayList<String> getArrayListByString(String string) {
ArrayList<String> copy = new ArrayList<String>(MAPPED_HIERARCHY.get(string).size());
for (String s : MAPPED_HIERARCHY.get(string))
copy.add(s);
return copy; //defensive copy
}
//This in my listener class
#Override public void onItemClick(AdapterView<?> listAdapter, View v, int position, long id) {
String text = ((TextView)v).getText().toString();
ArrayList<String> params = K.getArrayListByString(text);
Intent i = new Intent(...);
i.putExtra("params", params);
activity.startActivity(i);
}
I have a map which links an arraylist containing the menu items with the string wihich causes the menu to be displayed; on the click event, I simply retrieve the arraylist according with the selected item's text.
i have made menu list containing play, settings, exit. but clicking the button doesn take me to the desired activity the listner is not working..can any one help me solve the problem.. will b thankfull..
yes its a list view control..
there are two errors in my code one is that
## The type new AdapterView.OnItemClickListener(){} must implement the inherited abstract method AdapterView.OnItemClickListener.onItemClick(AdapterView, View, int, long)## in LINE1
And the other one is ## View cannot be resolved to a type## in LINE 2
"Actually i want to shift from one screen to another when i click on the item in main menu screen"
Here is the code of main menu
public class MenuActivity extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.menu);
ListView menuList = (ListView) findViewById(R.id.list);
String[] items = {
getResources().getString(R.string.pla),
getResources().getString(R.string.sco),
getResources().getString(R.string.set),
getResources().getString(R.string.hel),
getResources().getString(R.string.qui)
};
ArrayAdapter < String > adapt = new ArrayAdapter < String > (this, R.layout.menu_items, items);
menuList.setAdapter(adapt);
menuList.setOnItemClickListener(new AdapterView.OnItemClickListener() { //LINE 1 error
public void onItemClick(AdapterView <? > parent, View itemClicked, //LINE 2 error
int position, long id) {
TextView textView = (TextView) itemClicked;
String strText = textView.getText().toString();
if (strText.equalsIgnoreCase(getResources().getString(
R.string.pla))) {
// Game
startActivity(new Intent(MenuActivity.this,
GameActivity.class));
} else if (strText.equalsIgnoreCase(getResources().getString(
R.string.hel))) {
// Help
startActivity(new Intent(MenuActivity.this,
HelpActivity.class));
} else if (strText.equalsIgnoreCase(getResources().getString(
R.string.set))) {
//Settings
startActivity(new Intent(MenuActivity.this,
SettingsActivity.class));
} else if (strText.equalsIgnoreCase(getResources().getString(
R.string.sco))) {
// Scores
startActivity(new Intent(MenuActivity.this,
ScoresActivity.class));
}
}
});
}
}
ListView lv = ...;
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> arg0,View arg1, int arg2, long arg3)
{
//Do Your Stuff
}
});
or you can make your custom adapter and write the button's click event
use intent
Intent play= new Intent(getApplicationContext(),Play.class);
startActivity(play);
there's lots of tutorial about menu
This task can be accomplished using one of the android's main building block named as Intents and One of the methods public void startActivity (Intent intent) which belongs to your Activity class.
An intent is an abstract description of an operation to be performed. It can be used with startActivity to launch an Activity, broadcastIntent to send it to any interested BroadcastReceiver components, and startService(Intent) or bindService(Intent, ServiceConnection, int) to communicate with a background Service.
An Intent provides a facility for performing late runtime binding between the code in different applications. Its most significant use is in the launching of activities, where it can be thought of as the glue between activities. It is basically a passive data structure holding an abstract description of an action to be performed.
Refer the official docs -- http://developer.android.com/reference/android/content/Intent.html
public void startActivity (Intent intent) -- Used to launch a new activity.
So suppose you have two Activity class and on a button click's OnClickListener() you wanna move from one Activity to another then --
PresentActivity -- This is your current activity from which you want to go the second activity.
NextActivity -- This is your next Activity on which you want to move.
So the Intent would be like this
Intent(PresentActivity.this, NextActivity.class)
Finally this will be the complete code
public class PresentActivity extends Activity {
protected void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.content_layout_id);
final Button button = (Button) findViewById(R.id.button_id);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Perform action on click
Intent activityChangeIntent = new Intent(PresentActivity.this, NextActivity.class);
// currentContext.startActivity(activityChangeIntent);
PresentActivity.this.startActivity(activityChangeIntent);
}
});
}
}
This exmple is related to button click you can use the code anywhere which is written inside button click's OnClickListener() at any place where you want to switch between your activities like in your setOnItemClickListener.
I have a ListView in activity1 where I have a few items which are the word from the database . The User Clicks on an item in the Listview and it will navigate to activity2 where it should show the details of the word which are stored in database as column word, definitions . But What appears in Screen2 depends on what item was clicked in Screen 1
For Ex - User Clicks A in Screen 1 - Words starting from A come up in Screen 2. Is there any way to pass the row id so that in next screen the word and definition from the database can be displayed.
Thank you in adv..
code for first activity:
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView parent, View v, int position, long id) {
// TODO Auto-generated method stub
Cursor c = mDictCursor;
c.moveToPosition(position);
Intent i = new Intent(FirstActivity.this, SecondActivity.class);
Bundle bundle=new Bundle();
//intent.putExtra("position",position);
bundle.putLong(DBAdapter.KEY_ROWID, id);
bundle.putString(DBAdapter.KEY_TITLE, c.getString(
c.getColumnIndexOrThrow(DBAdapter.KEY_TITLE)));
bundle.putString(DBAdapter.KEY_DEFINITION, c.getString(
c.getColumnIndexOrThrow(DBAdapter.KEY_DEFINITION)));
i.putExtras(bundle);
startActivity(i);
}
SecondActivity code:
Bundle extras = getIntent().getExtras();
mRowId = extras.getLong(DBAdapter.KEY_ROWID);
String title = extras.getString(DBAdapter.KEY_TITLE);
String body = extras.getString(DBAdapter.KEY_DEFINITION);
TextView word = (TextView) findViewById(R.id.word);
word.setText(title);
TextView definition = (TextView) findViewById(R.id.definition);
definition.setText(body);
}
Whenever I am clicking the listview item it is showing dialog to force close. Please help...
you can use Intent object putExtra(String name, int value) method in Screen1(see1) and pass the intent object to Screen2,in Screen2 use getIntExtra(String name, int defaultValue) method of Intent object(see 2).
1.use startActivity(Intent intent) method in Screen1
2.use getIntent() method in Screen2 to get Intent object which you passed in the Screen1
I guess you are looking something similar like this .
https://market.android.com/developer?pub=acharya
https://market.android.com/details?id=com.acharyaapp.malayalam.aksharam.full
(Those are my apps)
Why dont you try using a Singleton class to store information. One Intent can set it and the other intent can read it. I employed that logic in my apps.
EDIT
public class MySingleton {
private static final MySingleton INSTANCE = new MySingleton();
//TODO ... all your variable as public static variables. eg. KEY_TITLE
private MySingleton() { }
public static MySingleton getInstance()
return INSTANCE;
}
}
Inside activities, use them as normal instances. Just make sure to call the getInstance() instead of constructor to get the shared instance.
hope this helps.