Develop Reference

How can I get value from an arrayadapter to pass it another activity

Here I'm trying to send my value that gets from a spinner (array adapter) to another activity. I populate my spinner using json and my spinner is something like below.
ArrayAdapter<String> adp = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, villageList);
spinner_village.setAdapter(adp);
spinner_village.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
try {
JSONObject villageObject = arrayList.get(position);
String villageId = villageObject.getString("id");
String villageName = villageObject.getString("name");
String villageCode = villageObject.getString("village_code");
Toast.makeText(Region.this, villageCode, Toast.LENGTH_SHORT).show();
} catch (JSONException e) {
e.printStackTrace();
}
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
Now I'm trying to get "villageCode" to my on create a method so that I can pass this value to my another activity. What I've done so far is
spinner_next.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(Region.this, Participant_Details.class)
.putExtra("catment_code", **-----**);
Region.this.startActivity(intent);
Region.this.finish();
}
})
putextra is giving error. How can I resolve it or what is the problem.

You can set the string villageCode as global variable (You can make your variable global by declaring it in the class level It should not be inside any method in your class) and then you extract the value of the string in your onClick method. Like so:
spinner_next.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(Region.this, Participant_Details.class)
.putExtra("catment_code", villageCode); //the value is being set here
Region.this.startActivity(intent);
Region.this.finish();
}
})

Replacing, updating, and saving text file for ListView Android

I am trying to update my ListView text file by replacing the word I just edited from returning from a Second Activity. Currently the output I am getting is a Toast of the word I just edited in the variable name in my onActivityResult().
How my app works.
Tap on item in ListView
Opens to Activity 2 with tapped item in EditText
edit the item and press save to return to first activity
edited item returns in variable name and is displayed in popup (toast)
I want to replace the item I just edited with the old item and save it so then when I reopen the app, the updated/edited item is in place of the old item.
I feel as though I have the parts to complete this but I am just starting on android development so I taking quite a while to figure this out. I was wondering if someone could lead me in the right direction.
Here is my Activity:
public class ToDoActivity extends Activity {
private ArrayList<String> todoItems;
private ArrayAdapter<String> todoAdapter; // declare array adapter which will translate the piece of data to teh view
private ListView lvItems; // attach to list view
private EditText etNewItem;
private final int REQUEST_CODE = 20;
//private Intent i;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_to_do);
etNewItem = (EditText) findViewById(R.id.etNewItem);
lvItems = (ListView) findViewById(R.id.lvItems); // now we have access to ListView
//populateArrayItems(); // call function
readItems(); // read items from file
todoAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, todoItems); //create adapter
lvItems.setAdapter(todoAdapter); // populate listview using the adapter
//todoAdapter.add("item 4");
setupListViewListener();
setupEditItemListener();
//onActivityResult(REQUEST_CODE, RESULT_OK, );
}
private void launchEditItem(String item) {
Intent i = new Intent(this, EditItemActivity.class);
i.putExtra("itemOnList", item); // list item into edit text
startActivityForResult(i, REQUEST_CODE);
//startActivity(i);
}
private void setupEditItemListener() { // on click, run this function to display edit page
lvItems.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> adapter, View item, int pos, long id) {
String text = (String) lvItems.getItemAtPosition(pos);
launchEditItem(text);
}
});
}
private void setupListViewListener() {
lvItems.setOnItemLongClickListener(new OnItemLongClickListener() {
#Override
public boolean onItemLongClick(AdapterView<?> adapter, View item, int pos, long id) {
todoItems.remove(pos);
todoAdapter.notifyDataSetChanged(); // has adapter look back at the array list and refresh it's data and repopulate the view
writeItems();
return true;
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.to_do, menu);
return true;
}
public void onAddedItem(View v) {
String itemText = etNewItem.getText().toString();
todoAdapter.add(itemText); // add to adapter
etNewItem.setText(""); //clear edit text
writeItems(); //each time to add item, you want to write to file to memorize
}
private void readItems() {
File filesDir = getFilesDir(); //return path where files can be created for android
File todoFile = new File(filesDir, "todo.txt");
try {
todoItems = new ArrayList<String>(FileUtils.readLines(todoFile)); //populate with read
}catch (IOException e) { // if files doesn't exist
todoItems = new ArrayList<String>();
}
}
private void writeItems() {
File filesDir = getFilesDir(); //return path where files can be created for android
File todoFile = new File(filesDir, "todo.txt");
try {
FileUtils.writeLines(todoFile, todoItems); // pass todoItems to todoFile
} catch (IOException e) {
e.printStackTrace();
}
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK && requestCode == REQUEST_CODE) {
String name = data.getExtras().getString("EditedItem");
Toast.makeText(this, name, Toast.LENGTH_LONG).show();
//writeItems();
}
}
}
If needed, I'll post my second Activity as well but I don't think it is necessary. However ask and you shall receive!

The solution you came up with is a bit basic and really limits you if it goes about resolving problem you mentioned. What I mean is that the Adapter you're using for your ListView consists only of simple ArrayList<String>, which prevents you from knowing which element is name you're looking for.
Better solution would be to create your own Adapter where each element would have a special key or something, but I'm afraid it's a bit too complicated for you for now. Keep in mind that it's possible and often very useful to create custom Adapters though.
What I thought could be possible in your case is a little hack maybe, but it works ONLY if you're totally sure that name is always stored at n-th position, let's say at 10th position.
Then you can do this:
private final int NAME_POSITION = 10;
Now that you have this position, you should find 10th line in your file, erase it and store new value. I won't be writing this code, because it's not really related to this question. There is a lot of questions about file reading/writing in Java on Stackoverflow that you should easily find the solution if you don't know how to do it yet. Basically you have to put this in this place:
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK && requestCode == REQUEST_CODE) {
String name = data.getExtras().getString("EditedItem");
Toast.makeText(this, name, Toast.LENGTH_LONG).show();
// Write your name to file now
}
}
The second approach would be to forget about files and use SharedPreferences for the updated name:
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK && requestCode == REQUEST_CODE) {
String name = data.getExtras().getString("EditedItem");
Toast.makeText(this, name, Toast.LENGTH_LONG).show();
SharedPrefrences sp = getSharedPreferences("MySavedValues", 0); // Open SharedPreferences with name MySavedValues
Editor editor = sp.edit();
editor.putString("Name", name); // Store name with key "Name". This key will be then used to retrieve data.
editor.commit();
}
}
and in onCreate():
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_to_do);
etNewItem = (EditText) findViewById(R.id.etNewItem);
lvItems = (ListView) findViewById(R.id.lvItems); // now we have access to ListView
//populateArrayItems(); // call function
readItems(); // read items from file
SharedPreferences sp = getSharedPreferences("MySavedValues", 0); // Open SharedPreferences with name MySavedValues
String name = sp.getString("Name", ""); // If there isn't any string stored with key "Name", it will return empty string
if(!name.isEmpty()) {
todoItems.set(NAME_POSITION, name);
}
todoAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, todoItems); //create adapter
lvItems.setAdapter(todoAdapter); // populate listview using the adapter
//todoAdapter.add("item 4");
setupListViewListener();
setupEditItemListener();
//onActivityResult(REQUEST_CODE, RESULT_OK, );
}
I haven't tested it, so you have to do it yourself. Also if you find my answer a bit complicated, feel free to ask about anything.

How to get data from text file onListItemClick in android?

I am currently working on an app to make mods for minecraft. My app has a simple file manager where I want to get the file data and put it in another activity in an EditText, when the user selects a file. I don't know how to get the data and send it to an EditText in another activity.
EDIT:
This is my OpenScript.class which I'm trying to push the data inside the file in a EditText on another activity but I have no clue how to do that.
public class OpenScript extends ListActivity {
private List<String> items =null;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.scripts_list);
getFiles(new File("/sdcard/ChatoGuy1/ModPE Scripter/Scripts").listFiles());
}
#Override
protected void onListItemClick(ListView l, View v, int position, long id) {
try{
Intent i = new Intent(this, ScriptWriter.class);
i.putExtra("code", /* ? */);
startActivityForResult(i, 1);
}
catch(Exception e){
}
}
private void getFiles(File[] files) {
items = new ArrayList<String>();
for (File file : files) {
items.add(file.getPath());
}
ArrayAdapter<String> fileList = new ArrayAdapter<String>(this, R.layout.file_list_row, items);
setListAdapter(fileList);
}
}
Second Activity:
public class ScriptWriter extends Activity{
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.code_editor);
final EditText editText = (EditText) findViewById(R.id.codeEditor);
final Button codeSave = (Button) findViewById(R.id.bCodeSave);
//get file
Intent intent = getIntent();
String test = intent.getExtras().getString("code");
//read file
StringBuilder text = new StringBuilder();
try {
BufferedReader br = new BufferedReader(new FileReader(test));
String line;
while ((line = br.readLine()) != null) {
text.append(line);
text.append('\n');
}
}
catch (IOException e) {
Toast.makeText(this, "File does not exist.", Toast.LENGTH_LONG).show();
}
editText.setText(text);
}
}

How to get data from text file onListItemClick in android?
#Override
protected void onListItemClick(ListView l, View v, int position, long id) {
try{
TextView tv = v.findViewById(<id_of_infliated_textView_in_your_adapter_class>)
String path - tv.getText().toString();
Intent i = new Intent(this, ScriptWriter.class);
i.putExtra("code", path );
startActivityForResult(i, 1);
}
catch(Exception e){
}
}
The above code works when you use the custom adapter (creating your own adapter class and infiliating layout file).
In your case it is quite simple.
How could I go about doing that? I can't seem to understand on how to
send the URI to my second activity. I know how to read a file from a
given path but not when user selects a file
To get the file path
As you already declare your Array list globally, and using this method in your code.
private void getFiles(File[] files) {
items = new ArrayList<String>();
for (File file : files) {
items.add(file.getPath());
}
ArrayAdapter<String> fileList = new ArrayAdapter<String>(this, R.layout.file_list_row, items);
setListAdapter(fileList);
}
make one more method saying "getFileAtPosition"
private String getFileAtPosition(int position){
return items.get(position);
}
And call the above function in your onListItemClick method
#Override
protected void onListItemClick(ListView l, View v, int position, long id) {
try{
Intent i = new Intent(this, ScriptWriter.class);
i.putExtra("code",getFileAtPosition(position));
startActivityForResult(i, 1);
}
catch(Exception e){
}
}

When the user selects a file on Activity A, you want to open a file and read it's contents and send the contents to Activity B where it will be displayed in an EditText widget. Right?
There's no need to send the file contents to Activity B in an intent. Just send the file URI as part of the intent to Activity B and then do the file read operation there and populate your EditText. That's much cleaner.
HTH.

How to select itemclick event for listview with multiple rows in android?

I am trying to get values from server and retrieved response from server, the details responsed from server are need to be displayed in a listview, i achieved that too, but while onitemclick process only first row in list view performs the click action but it is not performing for the remaining rows, how can i achieve it, dat is whatever the row and item i'm selecting it has to be processed by my code, here is my code for the reference, .........
public void userInterface() throws JSONException
{
if(json_user.get(0) != null)
{
downloadList1 = (ListView)findViewById(R.id.lvinbox);
populateData();
downloadList1.setOnItemClickListener(new OnItemClickListener()
{
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3)
{
// TODO Auto-generated method stub
fma=(TextView)findViewById(R.id.src);
st=(TextView)findViewById(R.id.sub);
fma.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
// TODO Auto-generated method stub
String fm=fma.getText().toString();
String s=st.getText().toString();
Intent m = new Intent(getApplicationContext(), InActivity.class);
m.putExtra("f", fm);
m.putExtra("s", s);
startActivity(m);
}
});
st.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
// TODO Auto-generated method stub
String fm=fma.getText().toString();
String s=st.getText().toString();
Intent m = new Intent(getApplicationContext(), InActivity.class);
m.putExtra("f", fm);
m.putExtra("s", s);
startActivity(m);
}
});
}
});
}
else
{
Toast.makeText(getApplicationContext(),"Empty", Toast.LENGTH_LONG).show();
finish();
Intent menu = new Intent(getApplicationContext(), MenActivity.class);
menu.putExtra("username", dest);
startActivity(menu);
}
}
public void populateData() throws JSONException
{
resultVector = new Vector<ListDataItemInbox>();
int len = json_user.length();
System.out.println("length--------------------->"+len);
for(int i=0;i<len;i++)
{
JSONObject obj=json_user.getJSONObject(i);
listData = new ListDataItemInbox();
listData.sets(obj.getString(KEY_S));
listData.setd(obj.getString(KEY_D));
resultVector.add(listData);
myHandler.post(myRunnable);
}
}
private Handler myHandler = new Handler();
private Runnable myRunnable = new Runnable()
{
public void run()
{
customListAdapter = new ListViewAdapterInbox(InActivity.this);
customListAdapter.setResultsData(resultVector);
downloadList1.setAdapter(customListAdapter);
}
};

You can do something like this.
make the ArrayList in list adapter class
ArrayList<Integer> selectedIds = new ArrayList<Integer>();
and create this method also in that same class.
public void toggleSelected(Integer position){
selectedIds.clear();
selectedIds.add(position);
}
Now whenever you click on any item of listview pass that item position to this method. And inside your getView method set the check before setting the text. something like this..
if (selectedIds.contains(position)){
----- your code ----
}else{
----- your code ----
}
it perform the operation only on selected position . Try it.!

Progress Dialog between to activites/intents

I am trying to pass information form one Activity to the other and while doing that I would like to have a progress dialog show. Mainly when the second activity is processing the information. I have been reading up and the proper way of doing it seems to be asynctask. Or is there another way of doing it?
Here is my code: Activity one
public class SearchActivity extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.search);
final EditText edittext = (EditText) findViewById(R.id.edittext);
edittext.setOnKeyListener(new OnKeyListener() {
public boolean onKey(View v, int keyCode, KeyEvent event) {
// If the event is a key-down event on the "enter" button
if ((event.getAction() == KeyEvent.ACTION_DOWN)
&& (keyCode == KeyEvent.KEYCODE_ENTER)) {
// Perform action on key press
String query = edittext.getText().toString();
// gets the text and makes sure its a string
Intent intent = new Intent(SearchActivity.this,
DissertationActivity.class);
intent.putExtra("query1", query);
startActivity(intent);
return true;
}
return false;
}
});
final Button button = (Button) findViewById(R.id.searchButton);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
String query = edittext.getText().toString();
// gets the text and makes sure its a string
Intent intent = new Intent(SearchActivity.this,
DissertationActivity.class);
intent.putExtra("query1", query);
startActivity(intent);
}
});
}
}
This is the Second activity:
public class DissertationActivity extends ListActivity {
/** Called when the activity is first created. */
public ArrayList<String> book_Array = new ArrayList<String>();
ArrayAdapter<String> adapter;
String href = "";
String href1 = "";
String search_Word = "";
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Bundle extras = getIntent().getExtras();
search_Word = extras.getString("query1");
adapter = new ArrayAdapter<String>(this, R.layout.list_item_1,
book_Array);
setListAdapter(adapter);
ListView lv = getListView();
lv.setTextFilterEnabled(true);
try {
Document doc = null;
Document guestLink = null;
guestLink = Jsoup.connect("https://aulib.abdn.ac.uk:443/F").get();
Element link = guestLink.select("p > a").first();
href1 = link.attr("href");
href = href1.substring(0, href1.length() - 2); // removes -0 from
// the
// href_Array.add(href); //adds href to the array because string
// wont add to the public var.
doc = Jsoup.connect(
href + "&request=" + search_Word
+ "&find_code=WRD&adjacent=N&x=0&y=0").get();
// System.out.println(doc);
Elements headings = doc.select("td:eq(3)");
// System.out.println(headings);
for (Element heading : headings) {
// System.out.println(heading.text());
String j = heading.text();
book_Array.add(j);
}
} catch (IOException e) {
e.printStackTrace();
}
book_Array.remove(0);
adapter.notifyDataSetChanged();
book_Array.remove(1);
adapter.notifyDataSetChanged();
book_Array.remove(2);
adapter.notifyDataSetChanged();
book_Array.remove("Search");
adapter.notifyDataSetChanged();
book_Array.remove(" | ");
adapter.notifyDataSetChanged();
book_Array.remove(0);
adapter.notifyDataSetChanged();
lv.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> a, View v, int position,
long id) {
// Context context = getApplicationContext();
int query = position;
// String text = book_Array.get(position);
// int duration = Toast.LENGTH_SHORT;
// Toast toast = Toast.makeText(context,
// String.valueOf(position), //shows the postion in the array
// list
// duration);
// toast.show();
Intent intent = new Intent(DissertationActivity.this,
FullDetailsActivity.class);
intent.putExtra("href", href);
intent.putExtra("query1", (int) query);
intent.putExtra("search_Word", search_Word);
startActivity(intent);
}
});
}
}
I tried using:
this.pd = ProgressDialog.show(this, "Working..", "Downloading Data...",
true, false);
But that didn't work.
How would I go about, so that it displays a progress dialog in between the activities?
Thanks for your help!

Calling ProgressDialog.show will block the UI thread. So the progress dialog/bar will not show up until the method has returned. So we can create a thread for our method to run within it. This will avoid blocking the main UI Thread.
Sample code -
ProgressDialog spinnerDialog = ProgressDialog.show(
Placeholder.this, "","Your text ", true);
new Thread(new Runnable() {
public void run() {
//your method code
return;
}
}).start();