Develop Reference

select the random image id every 24 hours

I want to select an image id every 24 hours . for example at special time like 12 a.m , i able to select a random id to set it to my imageview.
I know to use alarm manager , but I do not know how to use it.
here I just selected my random id like this ans set to SharedPreferences and finally it get it.
i want to this every 24 hours.
would you please help?
I am new with android.
private void setBG(int bg) {
SharedPreferences.Editor share1 = getSharedPreferences("share1", Context.MODE_PRIVATE).edit();
share1.putInt("bg", bg);
share1.commit();
}
private int getBG() {
SharedPreferences share1 = getSharedPreferences("share1", Context.MODE_PRIVATE);
return share1.getInt("bg", R.drawable.pg19);
}
private void showBGS() {
Random rand = new Random();
int rndInt = rand.nextInt(18) + 1;
String drawableName = "pg"+ rndInt;
int resID = getResources().getIdentifier(drawableName, "drawable", getPackageName());
setBG(resID);
}

How to "ellipsize" the title of a AlertDialog in the middle? [duplicate]

This question already has answers here:
Android TextView with multiline and "android:ellipsize = middle"
(5 answers)
Closed 6 years ago.
I have an AlertDialog whose title is supposed to be something like
Copying "xxx" to...
In case xxx is a very long string I would like it to be shortened instead of the whole title: it's important that the "to..." part is visible!
To make an example, if xxx == "A very long text here is being displayed!" I want the title of the AlertDialog to be:
Copying "A very long text here is bein..." to...
How to do it?

Logic = take a string> decide length you need to display > check the length of the string you have> remove unwanted characters to keep the length you want > reset new sting with other characters you need to add > set it as head!
String headText = "add anything you want here as head";
String newHead;
int maxCharYouWant= 25; // your word limit to display
if(headText.length()>25){
newHead = headText.substring(0, Math.min(headText.length(), 18)); // Get the first N number of words-> here 18
newHead = "\""+newHead+".."+"\""+"to.."; // reset with your format
}else {
newHead = headText; // length is ok no need to change it
}
LayoutInflater inflater = getLayoutInflater();
View dialogLayout = inflater.inflate(R.layout.body_layout, null); // for body
AlertDialog.Builder builder = new AlertDialog.Builder(Test.this);
TextView textView = new TextView(Test.this);
textView.setText(newHead);
builder.setCustomTitle(textView);// set your heading
builder.setView(dialogLayout);
builder.show();
Edit: To get the number of chars for the screen you can use a some method like this (I did not tested this on multiple devises for 1080 it returns 32.. you can try and see )
Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
DisplayMetrics metrics = getResources().getDisplayMetrics();
int width = (int)((float)size.x/metrics.scaledDensity);
TextView textView = new TextView(Test.this);
int totalCharstoFit= textView.getPaint().breakText(headText, 0, headText.length(), true, width, null);
Read more about breakText

delete/modify selected text in EdiText in android

I entered text in an EditText while designing a form filling app. Now, if i select part of that text, and wish to delete/modify it, I am not getting how to do it. All other options show how to clear entire textbox. How to clear just selected text.

EditText inputText=(EditText)findViewById(R.id.edit);
String inputString=inputText.getText().toString();
//To get the selected String
int selectionStart=inputText.getSelectionStart();
int selectionEnd=inputText.getSelectionEnd();
String selectedText = inputString.substring(selectionStart, selectionEnd);
if(!selectedText.isEmpty())
{
//Modify the selected StringHere
String modifiedString="...your modification logic here...";
//If you wish to delete the selected text
String selectionDeletedString=inputString.replace(selectedText,"");
inputText.setText(selectionDeletedString);
//If you wish to modify the selected text
String selectionModifiedString=inputString.replace(selectedText,modifiedString);
inputText.setText(selectionModifiedString);
}

You need to extract the string with
String fromEditText = editText.getText();
Now, you can do with string whatever you want and then put it back like
editText.setText(myString);
For operations with strings google working with strings and chars java on google.

Try this..
public void modifyText(View view ) {
if (view instanceof EditText) {
if(view.getText().toString().equals("Selected text")){
view.setText("Your Text");
}
}
if (view instanceof ViewGroup) {
for (int i = 0; i < ((ViewGroup) view).getChildCount(); i++) {
View innerView = ((ViewGroup) view).getChildAt(i);
modifyText(innerView);
}
}
}
call this in your activity modifyText(findViewById(R.id.rootView));
This will modify all EditText in the current activity

I found this to be the best solution.
String contents = editText.getText().toString(), newText;
newText = contents.substring(0, noteEdit.getSelectionStart()) +
contents.substring(editText.getSelectionEnd(), contents.length());
editText.setText(newText);

Edit Selection
An easy and best(maybe) way of modifying the selected text.
int start = descriptionBox.getSelectionStart();
int end = descriptionBox.getSelectionEnd();
String modifiedText = "*" + descriptionBox.getText().subSequence(start, end) + "*";
descriptionBox.getText().replace(start, end, modifiedText);
Input Text ( '|' indicate selection )
hello |world|
Output Text
hello *world*
Delete Selection
All you have to do is replace the start and end of selection with empty String.
int start = descriptionBox.getSelectionStart();
int end = descriptionBox.getSelectionEnd();
descriptionBox.getText().replace(start, end, "");

Android: IndexOutOfBounds Error when deleting row in ListView

I have an application that has 2 screens. The first screen has a ListView of movies with a row consisting of 3 Elements: Title, Date and Gross declared in strings.xml. The user has the option of adding a movie by clicking the menu button, which sends him to another screen. The second screen has 3 Edit texts that correspond to Title Date and Gross, which is alphabetically sorted straight away when it returns to screen 1.
Similarly, the user can also Edit/Delete entries by long clicking a row thatbrings up a context menu. The Edit function works like this:
a.) User long clicks Titanic and chooses Edit
b.) Row gets deleted, and user is brought to screen 2
c.) Edit texts are populated with the initial data from the deleted Row
d.) When user edits data, new movie is added at the bottom of the ListView.
The problem arises when the user deletes this new movie at the bottom of the ListView. Logcat gives a
java.lang.IndexOutOfBoundsException: Invalid index 50, size is 50
Here is my code (Take note I am using Perst to persist data, but I don;t think that won't really matter with my problem):
case R.id.contextedit:
Lab9_082588FetchDetails row = (Lab9_082588FetchDetails) getListView()
.getItemAtPosition(info.position);
Intent editData = new Intent(MovieList.this, Lab9_082588Edit.class);
String startTitle = row.getTitle();
String startGross = row.getGross();
String startDate = row.getDate();
editData.putExtra(Lab9_082588Edit.TITLE_STRING, startTitle);
editData.putExtra(Lab9_082588Edit.GROSS_STRING, startGross);
editData.putExtra(Lab9_082588Edit.DATE_STRING, startDate);
startActivityForResult(editData, MovieList.EDIT_MOVIE);
int posEdit = info.position;
String editTitle = results.get(info.position).getTitle();
results.remove(posEdit);
adapter.notifyDataSetChanged();
//Perst
Index<Lab9_082588FetchDetails> rootEdit = (Index<Lab9_082588FetchDetails>) db
.getRoot();
rootEdit.remove(editTitle, results.get((int) info.id));
db.setRoot(rootEdit);
return true;
Edit Class:
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection using item.getItemId()
switch (item.getItemId()) {
case R.id.edit:
next();
break;
}
return true;
}
private void next() {
// TODO Auto-generated method stub
EditText movieTitle = (EditText) findViewById(R.id.etTitle);
EditText movieGross = (EditText) findViewById(R.id.etGross);
EditText movieDate = (EditText) findViewById(R.id.etDate);
String title = movieTitle.getText().toString();
String gross = movieGross.getText().toString();
String date = movieDate.getText().toString();
if ((title.length() > 0) && (gross.length() > 0)
&& (date.length() == 4)) {
Intent hobby = getIntent();
hobby.putExtra(Lab9_082588Edit.TITLE_STRING, title);
hobby.putExtra(Lab9_082588Edit.GROSS_STRING, gross);
hobby.putExtra(Lab9_082588Edit.DATE_STRING, date);
setResult(RESULT_OK, hobby);
finish();
}
}
Delete function:
int posDelete = info.position;
String deleteTitle = results.get(
info.position).getTitle();
results.remove(posDelete);
adapter.notifyDataSetChanged();
Index<Lab9_082588FetchDetails> rootDelete = (Index<Lab9_082588FetchDetails>) db
.getRoot();
rootDelete.remove(deleteTitle,
results.get(info.position));
db.setRoot(rootDelete); //Perst
return;
OnActivityResult (Edit):
case EDIT_MOVIE:
Lab9_082588FetchDetails edittedMovie = new Lab9_082588FetchDetails();
NumberFormat formatterEdit = new DecimalFormat("###,###,###");
edittedMovie.setTitle(data
.getStringExtra(Lab9_082588Add.TITLE_STRING));
edittedMovie.setGross("$"
+ formatterEdit.format(Double.parseDouble(data
.getStringExtra(Lab9_082588Add.GROSS_STRING))));
edittedMovie.setDate(data
.getStringExtra(Lab9_082588Add.DATE_STRING));
results.add(edittedMovie);
adapter.notifyDataSetChanged();
Populating the Listview:
for (int i = 0; i < items.size(); i++) {
Lab9_082588FetchDetails sr = new Lab9_082588FetchDetails();
sr.setTitle(items.get(i).getTitle());
sr.setGross(items.get(i).getGross());
sr.setDate(items.get(i).getDate());
results.add(sr);
Collections.sort(results, ignoreCaseStart);
}
How do I remedy this?

This problem occurs because in your delete function, you first remove the element from the results collection("results.remove(posDelete);"), and then, a few lines later, you call "results.get(info.position)" to fetch a parameter for the rootDelete.remove call, but which is already removed.
If the element is the last element of your collection, let's say the 50th element, the value for "info.position" is 50. You remove one element, so the number of elements is now 49. In the rootDelete.remove line you call results.get(50), which produces the error.

android xml node parse array adapter weird

I have an odd problem, (see shorter version at the bottom first please)
When my activity starts for the first time, the listview shows the dataset fine. The adapter is a custom adapter which shows 2 rows of text and an image. I call an asynctask upon a click event to the listview, the dataset updates in accordance with whatever was clicked on in the listview - more specifically the arrays which are associated with the adapter become rewritten with the parsings of some xml, and then notifyachapterdatasetchanged method is called to update the listview in the onPostExecute function. However I always get NullPointerException when I am iterating through some xml (which is very well formed and validates). ALso its worth mentioing that the algorithm that parses the desired values is good, because as mentioned above, if i write to just 1 element of the array then I dont get the error I just get the last node value so its looping in the correct places. i.e If I simple try to copy the current node value I am parsing during the loop into, say, producyTypes[0] then the last value from within the loop actually makes it to the listview as it constantly overwrites this elemet of the array
Here is my code.`
public class main extends Activity implements OnItemClickListener
{
String selectedType="";
ListView lview3;
ImageView iv;
ListViewCustomAdapter adapter;
String test = "";
List<String> ls;
String productTypes[] = {"Monitor","Components","Systems","Laptops","Flash / Usb Memory",
"Networking","Cables","Peripherals","Sound and Vision", "Software"};
String productsIncluded[] = {"Sizes (inches) 17, 19, 20",
"Motherboards, PSU, Cases, Fans/Heatsinks/Coolers, Barebones Systems, Blue-Ray/DVD. Card Readers, Controller Cards, Drive Enclosures, Sound Cards",
"Bundles, Switches and Hubs, Print Servers, Accessories/Modules",
"Cables for: Drives, Networking, HDMI/Monitor, Audio/Video, USB/Firewire, Power, Miscellaneous",
"Mice, Connectors, Bluetooth Devices",
"Mp3/Mp4 Solar Panel",
"Anti-Virus, Internet Security, Operating Systems, Office,,
"",
""};
private static int images[] = {R.drawable.monitor, R.drawable.components, R.drawable.systems,
R.drawable.laptops, R.drawable.flashusb, R.drawable.networking, R.drawable.cables, R.drawable.
peripherals, R.drawable.soundandvision, R.drawable.software};
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
iv = (ImageView)findViewById(R.id.ImageView01);
iv.setImageResource(R.drawable.logo);
iv.setVisibility(View.VISIBLE);
lview3 = (ListView) findViewById(R.id.listView3);
adapter = new ListViewCustomAdapter(main.this, productTypes, productsIncluded, images);
lview3.setAdapter(adapter);
lview3.setOnItemClickListener(main.this);
}
#Override
public void onItemClick(AdapterView arg0, View arg1, int position, long id) {
selectedType = "";
if(position == 0)
{
selectedType= "Monitors";
}
if(position == 1)
{
selectedType= "Hard Drives";
}
Toast.makeText(this, Integer.toString(position), Toast.LENGTH_SHORT).show();
new async().execute();
/*
Intent intent = new Intent(getApplicationContext(),activitywo.class);
Bundle bundle =new Bundle();
bundle.putString("selectedType",selectedType);
intent.putExtras(bundle);
startActivity(intent);
//Toast.makeText(this, "Title => "+productTypes[position]+" \n Description => "+productsIncluded[position], Toast.LENGTH_SHORT).show();
*/
}
private class async extends AsyncTask<String, Void, Void> {
// UI Thread
protected void onPreExecute() {
}
// automatically done on worker thread (separate from UI thread)
protected Void doInBackground(final String... args) {
try{
Resources res = getResources();
InputStream in;
in = res.openRawResource(R.raw.core);
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document dom = builder.parse(in);
Element root = dom.getDocumentElement();
NodeList items = root.getElementsByTagName("entry");
count=0;
for(int i =0;i<items.getLength();i++){
Node item = items.item(i);
NodeList properties = item.getChildNodes();
//productsDefinedByTypeArray = new String[properties.getLength()];
for(int j = 0;j<properties.getLength();j++){
Node property = properties.item(j);
String name = property.getNodeName();
if(name.equalsIgnoreCase("g:product_type")){//everytime we hit g:product_type grab the value
String strText = property.getFirstChild().getNodeValue();
if(strText.contains(selectedType)){
//
for(int k = 0;k<properties.getLength();k++){
Node propertysecond = properties.item(k);
String namesecond = propertysecond.getNodeName();
if(namesecond.equalsIgnoreCase("title")){//everytime we hit title grab the value
String strTextsecond = propertysecond.getFirstChild().getNodeValue();
productTypes[0] = strTextsecond;
yo = strTextsecond;
count++;
}
}
}
}
}
}
The code crashes at the point where I am trying to copy the value of a "title" node that I parse out of my xml file into the list-String-. I am using a list-string- to show that even if you try and copy the value into the array itself (the array that is associated with the adapter), even if you comment out the notifydatasetchanged () line the program still crashes. The xml is well formed and very consistent. I know this because (aecept the fact its really small and I have read it all) ! Why can I not copy every node value into my array/list whilst the loop is in progress?
Any help is massively appreciated. Thank you.
Shorter version:
I cannot write to the List
if(strText.contains(selectedType)){
//
for(int k = 0;k<properties.getLength();k++){
property = properties.item(k);
name = property.getNodeName();
if(name.equalsIgnoreCase("title")){//everytime we hit title grab the value
String strTextsecond = property.getFirstChild().getNodeValue().toString();
ls.add(strTextsecond.toString());
//test = strTextsecond;
}
}
}

Maybe you forget initialize ls? I don't find in your code something like:
ls = new List<String>();