I'm not sure why it keeps force closing as soon as I click on one of the items from the listview. I get the position and pass it on to other activity but as soon as I try and display it or put it in an editText, it shuts down. It's probably something simple but I am lost.
First Activity
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id)
{
itemPosition = position;
String itemValue = (String) listView.getItemAtPosition(position);
Intent myIntent = new Intent(view.getContext(), EnterInfoActivity.class);
myIntent.putExtra("position",itemPosition);
startActivity(myIntent);
}
});
Second Activity:
protected void onCreate(Bundle savedInstantState){
super.onCreate(savedInstantState);
setContentView(R.layout.enterinfo_layout);
int value;
Bundle extras = getIntent().getExtras();
value = extras.getInt("position");
Toast.makeText(getApplicationContext(), value, Toast.LENGTH_LONG);
}
You cannot set an int value as toast text. Android assumes that an int value is a reference to a string in the strings.xml, which of course cannot be found. If you want to show the toast like that, then you need to convert the int to a String
Toast.makeText(getApplicationContext(),String.valueOf(value), Toast.LENGTH_LONG);
Related
I am trying to save listview selected position in a string and passing to next activity as shown below:
I have set my listview default selection to first row by setting it as :
lv1.setAdapter(adapter);
lv1.setItemChecked(0, true);
lv1.setSelection(0);
Declaration variables:
int myposition;
String myvalue;
LIstView ItemClick:
lv1.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> a, View v, int position,
long id) {
myposition=position;
myvalue = String.valueOf(myposition);
}
});
This is how I move it to next activity using button click:
btnNxt.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(getApplicationContext(),Step3Activity.class);
// Pass a single position
i.putExtra("selposition", myvalue);
// Open SingleItemView.java Activity
startActivity(i);
}
});
This is how I get the intent on the newActivity:
Intent i = getIntent();
// Get a single position
position = i.getExtras().getInt("selposition");
myvalue = String.valueOf(position);
Toast.makeText(getBaseContext(),
myvalue,
Toast.LENGTH_SHORT).show();
But it always gives me the position '0'. So am i getting this by setting the default selection of 1st row ? Can anyone clarify me with this?
try something like this to get the value:
position = Integer.parseInt(i.getExtras().getString("selposition"));
Hope it will work.
I am trying to pass a value on my ListView to my second activity using Intents. I am not sure how to pass the text value to the second activity my Intent leads to. Right now my Intent is able to connect to the second activity on tap but it doesn't pass the string of the tapped value.
I feel that I need to pass something into my launchEditItem() but I am not sure what. These are the two functions I am dealing with right now.
private void launchEditItem() {
Intent i = new Intent(this, EditItemActivity.class);
i.putExtra("itemOnList", ); // list item into edit text
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) {
launchEditItem();
}
});
}
I'm not sure what value to place into the i.putExtra(), but I think I need to pass an argument into the launchEditItem().
This is what is currently in my second Activity:
public class EditItemActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_edit_item);
Intent i = getIntent();
String ItemToEdit = i.getStringExtra("itemOnList");
// place into EditText using ItemToEdit
}
I'm also not sure how to place this String value (ItemToEdit) into an EditText box. I'm new to android dev so I'm learning as much as I can thank you!
* EDIT *
I guess I'm a bit too vague in my question. Here is the entire code of the small app I am working on
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;
#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();
}
private void launchEditItem() {
Intent i = new Intent(this, EditItemActivity.class);
i.putExtra("itemOnList", ); // list item into edit text
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) {
launchEditItem();
}
});
}
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();
}
}
}
String[] link_list;
int currenttrack=0;
link_list=new String[]{
"W-TE_Ys4iwM",//1
"oozgmH3ZP14",//2
"o_v9MY_FMcw",//3
"36mCEZzzQ3o",//4
}
First activity
list.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
currenttrack=arg2;
Intent videoIntent=new Intent(MainActivity.this,VideoView.class);
videoIntent.putExtra("filename", link_list[currenttrack]);
startActivity(videoIntent);
}
});
In your Second Activity
// getting intent data
// get intent data
Intent i = getIntent();
Bundle extras = i.getExtras();
filename = extras.getString("filename");
Log.e("File Name", filename);
and your done :)
In your current Activity, create a new Intent:
Intent i = new Intent(getApplicationContext(), NewActivity.class);
i.putExtra("new_variable_name","value");
startActivity(i);
Then in the new Activity, retrieve those values:
Bundle extras = getIntent().getExtras();
if (extras != null) {
String value = extras.getString("new_variable_name");
}
I am not sure if i understood where is the value. Well if the value is in EditText do something like:
private void launchEditItem(String text) {
Intent i = new Intent(this, EditItemActivity.class);
i.putExtra("itemOnList", text); // list item into edit text
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) {
EditText editView = (EditText) item.findById(R.id.ItemToEdit);
String text = editView != null ? editView.getText().toString() : "";
launchEditItem(text);
}
});
}
1 - I have some doubt with:
i.putExtra("itemOnList", );
You'd better pass a value:
i.putExtra("itemOnList", "something");
2 - To valorize a control, you must obtain a reference to it first. Something like:
EditText edt =
(EditText) findViewById(R.id.activity_edit_item_my_EditText); // or whatever id you assigned to it (it MUST HAVE AN ID)
Do it AFTER setContentView().
Then you can set it's text like:
edt.setText(ItemToEdit); // Now it should contain "something"
Just as simple as that
[EDIT]
If you aren't sure what to pass so is to pass in the "tapped" value in the ListView into the putExtra, modify your listview click handler code:
list.setOnItemClickListener
(
new OnItemClickListener()
{
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3)
{
// TODO Auto-generated method stub
Intent videoIntent = new Intent(MainActivity.this, VideoView.class);
videoIntent.putExtra("filename", (((TextView) v).getText().toString());
startActivity(videoIntent);
}
}
);
It should work immediately.
01: Current Activity
String pass_value ="value";
Intent intent = new Intent(getApplicationContext(),NewActivity.class);
intent.putExtra("var_name",pass_value);
startActivity(intent);
02: New Activity
String value = getIntent().getExtras().getString("var_name");
I am trying to set the text of an EditText via a ListView. Once the user chooses a product from the ListView, it will then go back to the activity that holds the EditText, and change the text within the EditText.
I am relatively new to Android and Java, so excuse me for being an absolute nub.
List Java:
final ListView listViewCPU = (ListView) findViewById(R.id.listViewCPU);
listViewCPU.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
String CPUList[] = {
"Products go here", "Products go here", "Products go here", "Products go here", "Products go here", "Products go here" };
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, CPUList);
listViewCPU.setAdapter(adapter);
listViewCPU.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> listview, View myView,
int pos, long mylng) {
String CPU = (String) listview.getAdapter().getItem(pos);
Intent i = new Intent(getApplicationContext(), ListmenuActivity.class);
i.putExtra(" ", CPU);
startActivity(i);
}
});
}
}
EditText Java:
I am getting the error on "EditText4" defining "Syntax error on token "EditText4", delete this token"
EditText CPU = (EditText) findViewById(R.id.autoCompleteTextView4);
CPU.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent CPUList = new Intent(getApplicationContext(),
CPUList.class);
startActivityForResult(CPUList, 0);
}
Intent i = getIntent();
String product = i.getStringExtra(" ");
EditText CPU = ((EditText)findViewById(R.id.EditText4));
EditText4.setText(getIntent(i).getStringExtra(""));
});
Should be CPU.setText not EditText4 as you dont really have that defined (as long as I can see)
you set this way
#Override
public void onItemClick(AdapterView<?> listview, View myView,
int pos, long mylng) {
String CPU = (String) listview.getAdapter().getItem(pos);
Intent i = new Intent(getApplicationContext(), ListmenuActivity.class);
i.putExtra("key", CPU);
startActivity(i);
}
});
get the value like that
Intent i = getIntent();
String product = i.getStringExtra("key");
EditText CPU = ((EditText)findViewById(R.id.EditText4));
CPU.setText(product);
EditText CPU = ((EditText)findViewById(R.id.EditText4));
You are mising a semicolon on this line :)
Once the user chooses a product from my ListView, it then puts the selected text from that ListView into an EditText. The problem I am having is when the user selects a product from the list, and then presses back, it comes up with the list again instead of returning to the EditText activity.
I have tried using "finish();" after the activity starts but nothing seems to be working.
Activity that holds the EditText that launches the List activity:
EditText CPU = (EditText) findViewById(R.id.autoCompleteTextView4);
CPU.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent CPUList = new Intent(getApplicationContext(),
CPUList.class);
startActivityForResult(CPUList, 1);
Intent i = getIntent();
String product = i.getStringExtra("key");
EditText CPU = ((EditText) findViewById(R.id.autoCompleteTextView4));
CPU.setText(product);
}
});
List view class
#Override
public void onCreate(Bundle OnsaveInstanceState) {
super.onCreate(OnsaveInstanceState);
setContentView(R.layout.activity_cpulist);
ListView listViewCPU = (ListView) findViewById(R.id.listViewCPU);
listViewCPU.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
String CPUList[] = {
"CPU's go here", "CPU's go here", "CPU's go here", "CPU's go here" };
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, CPUList);
listViewCPU.setAdapter(adapter);
listViewCPU.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> listview, View myView,
int pos, long mylng) {
String CPU = (String) listview.getAdapter().getItem(pos);
Intent i = new Intent();
i.putExtra("key", CPU);
setResult(1, i);
finish();
}
});
You need to launch your activity in a way that it doesn't get added to back stack.
Here's how you do that: https://stackoverflow.com/a/12358563/375929
If I understand you correctly, you are calling finish() on the wrong Activity. If you want the list Activity to finish then that's where you need to call finish()
#Override
public void onItemClick(AdapterView<?> listview, View myView,
int pos, long mylng) {
String CPU = (String) listview.getAdapter().getItem(pos);
Intent i = new Intent(getApplicationContext(),
ListmenuActivity.class);
i.putExtra("key", CPU);
startActivity(getIntent());
startActivity(i);
finish(); // finish here
}
and remove finish() from your EditText Activity
Another issue I see is it looks like you are starting that second bit of code with the first using startActivityForResult() but you aren't sending back a result in your second code. Instead, you seem to be starting another Activity. It seems that second bit should be more like
#Override
public void onItemClick(AdapterView<?> listview, View myView,
int pos, long mylng) {
String CPU = (String) listview.getAdapter().getItem(pos);
Intent i = new Intent();
i.putExtra("key", CPU);
setResult(1, i);
finish(); // finish here
}
I'm a working on a recipe app, and I was wondering if you can use list items to change screen, send text to next activity, just like you would using a button,
if its possible then how do i do it?
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// When clicked, show a toast with the TextView text
Toast.makeText(getApplicationContext(), ((TextView) view).getText(),
Toast.LENGTH_SHORT).show();
Intent intent = new Intent(CURRENT_ACTIVITY.this*, NEW_ACTIVITY.class);
intent.putExtra("keyName", "somevalue");
startActivity(intent);
}
});
in Activity B
Bundle extras = getIntent().getExtras();
if(extras !=null)
{
String value = extras.getString("keyName");
}