Not sure why it crash while looping the array:
Code:
final String tname[] = getResources().getStringArray(R.array.tname);
final int tid[] = getResources().getIntArray(R.array.tid);
final int tlv[] = getResources().getIntArray(R.array.tlv);
int tlength = tname.length;
String pname[] = new String[tlength];
int pid[] = new int[tlength];
for(int i = 0; i < tlength; i++) {
if(tlv[i] <= 0) {
pname[i] = tname[i];
pid[i] = tid[i];
}
}
setListAdapter(new ArrayAdapter<String>(this, R.layout.pMenu, pname));
Thanks in advance!
I am developing an application which draws the path of the user as he moves and calculates the area .
This is the code i am trying my problem is at the start of recording the path the path is drawn even if the user has not moved and sometimes when even if user is moving the path is not drawn .
RouteOverlay class:
public class RouteOverlay extends Overlay {
private GeoPoint gp1;
private GeoPoint gp2;
private int mode = 1;
public RouteOverlay(GeoPoint paramGeoPoint1, GeoPoint paramGeoPoint2,int paramInt)
{
this.gp1 = paramGeoPoint1;
this.gp2 = paramGeoPoint2;
this.mode = paramInt;
}
public void draw(Canvas paramCanvas, MapView paramMapView,
boolean paramShadow)
{
super.draw(paramCanvas, paramMapView, paramShadow);
Projection projection = paramMapView.getProjection();
Paint mPaint = new Paint();
mPaint.setDither(true);
mPaint.setAntiAlias(true);
mPaint.setColor(Color.RED);
mPaint.setStyle(Paint.Style.FILL_AND_STROKE);
mPaint.setStrokeJoin(Paint.Join.ROUND);
mPaint.setStrokeCap(Paint.Cap.ROUND);
mPaint.setStrokeWidth(3);
mPaint.setAlpha(120);
Point p1 = new Point();
Point p2 = new Point();
Path path = new Path();
projection.toPixels(gp1, p1);
projection.toPixels(gp2, p2);
path.moveTo(p2.x,p2.y);
path.lineTo(p1.x,p1.y);
paramCanvas.drawPath(path, mPaint);
}
MainActivity:
public class MainActivity extends MapActivity {
public final LocationListener locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
coordinates.add(location);
mapView.getController().animateTo(getGeoByLocation(location));
drawRoute(coordinates, mapView);
}
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_area_measurement);
this.mapView = ((MapView) findViewById(R.id.mapview));
this.mapView.setBuiltInZoomControls(false);
this.mapView.getController().setZoom(17);
this.coordinates = new ArrayList<Location>();
}
protected boolean isRouteDisplayed() {
return false;
}
private GeoPoint getGeoByLocation(Location location) {
GeoPoint gp = null;
try {
if (location != null) {
double geoLatitude = location.getLatitude() * 1E6;
double geoLongitude = location.getLongitude() * 1E6;
gp = new GeoPoint((int) geoLatitude, (int) geoLongitude);
}
} catch (Exception e) {
e.printStackTrace();
}
return gp;
}
public String getLocationProvider(LocationManager paramLocationManager) {
try {
Criteria localCriteria = new Criteria();
localCriteria.setAccuracy(1);
localCriteria.setAltitudeRequired(false);
localCriteria.setBearingRequired(false);
localCriteria.setCostAllowed(true);
localCriteria.setPowerRequirement(3);
String str = paramLocationManager.getBestProvider(localCriteria,
true);
return str;
} catch (Exception localException) {
while (true) {
localException.printStackTrace();
}
}
}
private void drawRoute(ArrayList<Location> paramArrayList,MapView paramMapView) {
List<Overlay> overlays = paramMapView.getOverlays();
//Changed for smooth rendering
overlays.clear();
for (int i = 1; i < paramArrayList.size(); i++) {
overlays.add(new RouteOverlay(getGeoByLocation(paramArrayList.get(i - 1)), getGeoByLocation(paramArrayList.get(i)),2));
}
}
public void startRecording() {
this.isMeasuring = true;
lm = (LocationManager) getSystemService(LOCATION_SERVICE);
lm.requestLocationUpdates(getLocationProvider(lm),500,2,this.locationListener);
/*if (lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER)){
gpsstatus.setText("Gps Is Enabled");
}else
{ gpsstatus.setText("Gps Is disabled");}*/
}
This probably has to do with the accuracy of the GPS. I didn't really look at your code but maybe you should add some kind of buffer. if (movement>5m){//draw stuff}
I'm new to android,stuck in this part of my code.
I do hope, someone would help me with it.
As ,I've stuck for quite a while and have to complete within 2 days,
If I would like to filter in spinner based on the dates, how should I do it? For example,
I've a list of events, and in my spinner
when I select "Today", it will show out the list for today.
I've tried out the coding, however, I met some error. The part in BOLD, ** is having error.
I would like to get the XML data from here:
[attached in this thread]
the highlighted part
here is my coding: AndroidXMLParsingActivity.java
public class AndroidXMLParsingActivity extends ListActivity implements OnItemSelectedListener {
String[] browseby;
String[] dates = { "Today", "Tomorrow", "Next Week",
};
ArrayList<String> browse = new ArrayList<String>();
ArrayList<String> mPostingData = new ArrayList<String>();
Spinner s1;
ListView listview;
CustomAdapter cus;
// All static variables
static final String URL = " URL ";
// XML node keys
static final String KEY_EVENT = "event"; // parent node
static final String KEY_TITLE = "title";
static final String KEY_START_TIME = "start_time";
@override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ArrayList<HashMap<String, String>> menuItems = new ArrayList<HashMap<String, String>>();
XMLParser parser = new XMLParser();
String xml = parser.getXmlFromUrl(URL); // getting XML
Document doc = parser.getDomElement(xml); // getting DOM element
NodeList nl = doc.getElementsByTagName(KEY_EVENT);
// looping through all item nodes <item>
for (int i = 0; i < nl.getLength(); i++) {
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
Element e = (Element) nl.item(i);
// adding each child node to HashMap key => value
map.put(KEY_TITLE, parser.getValue(e, KEY_TITLE));
map.put(KEY_START_TIME, parser.getValue(e, KEY_START_TIME));
// adding HashList to ArrayList
menuItems.add(map);
}
// Adding menuItems to ListView
ListAdapter adapter = new SimpleAdapter(this, menuItems,
R.layout.list_item, new String[] { KEY_TITLE,KEY_START_TIME }, new int[] {
R.id.title,
R.id.startTime });
setListAdapter(adapter);
// selecting single ListView item
ListView lv = getListView();
lv.setOnItemClickListener(new OnItemClickListener() {
@override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String title = ((TextView) view.findViewById(R.id.title))
.getText().toString();
// Starting new intent
Intent in = new Intent(getApplicationContext(),
SingleMenuItemActivity.class);
in.putExtra(KEY_TITLE, title);
startActivity(in);
}
});
listview = (ListView) findViewById(R.id.listView1);
s1 = (Spinner) findViewById(R.id.spinner1);
for (int i = 0; i < browseby.length; i++) {
browse.add(browseby);
}
// aa = new
// ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,Category);
s1.setOnItemSelectedListener(this);
mPostingData = browse;
for (int i = 0; i < mPostingData.size(); i++) {
if (mPostingData.size() > 0)
Log.i("Datas", mPostingData.get(i));
}
cus = new CustomAdapter(this, 0);
setListAdapter(cus);
ArrayAdapter<String> aa = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, dates);
aa.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
s1.setAdapter(aa);
}
public void onItemSelected(AdapterView<?> parent, View v, int position,
long id) {
// listview.setFilterText(Category[position]);
String Text = s1.getSelectedItem().toString();
cus.getFilter().filter(Text);
cus.notifyDataSetChanged();
}
public void onNothingSelected(AdapterView<?> parent) {
// listview.setFilterText("");
}
public void onListItemClick(ListView parent, View v, int position, long id) {
Toast.makeText(this, "You have selected " + mPostingData.get(position),
Toast.LENGTH_SHORT).show();
}
class CustomAdapter extends ArrayAdapter<String> {
public void setData(ArrayList<String> mPpst) {
mPostingData = mPpst;// contains class items data.
}
@override
******public Filter getFilter() {
return new Filter() {
@override
protected void publishResults(CharSequence constraint,
FilterResults start_time) {
if (start_time.equals("2013-09-25") {
setData((ArrayList<String>) start_time.values);
} else {
setData(browse);// set original values
}
notifyDataSetInvalidated();
}******
@override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults result = new FilterResults();
if (!TextUtils.isEmpty(constraint)) {
constraint = constraint.toString();
ArrayList<String> foundItems = new ArrayList<String>();
if (browse != null) {
for (int i = 0; i < browse.size(); i++) {
if (browse.get(i).contains(constraint)) {
System.out.println("My datas" + browse.get(i));
foundItems.add(browse.get(i));
} else {
}
}
}
result.count = foundItems.size();// search results found
// return count
result.values = foundItems;// return values
} else {
result.count = -1;// no search results found
}
return result;
}
};
}
LayoutInflater mInflater;
public CustomAdapter(Context context, int textViewResourceId) {
super(context, textViewResourceId);
// TODO Auto-generated constructor stub
mInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@override
public int getCount() {
// TODO Auto-generated method stub
return mPostingData.size();
}
@override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
ViewHolder vh;
if (convertView == null) {
vh = new ViewHolder();
convertView = mInflater.inflate(R.layout.row, null);
vh.t1 = (TextView) convertView.findViewById(R.id.textView1);
convertView.setTag(vh);
} else {
// Get the ViewHolder back to get fast access to the TextView
// and the ImageView.
vh = (ViewHolder) convertView.getTag();
}
if (mPostingData.size() > 0)
vh.t1.setText(mPostingData.get(position));
return convertView;
}
}
static class ViewHolder {
TextView t1;
}
}
randomise said:
I'm new to android,stuck in this part of my code.
I do hope, someone would help me with it.
As ,I've stuck for quite a while and have to complete within 2 days,
If I would like to filter in spinner based on the dates, how should I do it? For example,
I've a list of events, and in my spinner
when I select "Today", it will show out the list for today.
I've tried out the coding, however, I met some error. The part in BOLD, ** is having error.
I would like to get the XML data from here:
[attached in this thread]
the highlighted part
here is my coding: AndroidXMLParsingActivity.java
public class AndroidXMLParsingActivity extends ListActivity implements OnItemSelectedListener {
String[] browseby;
String[] dates = { "Today", "Tomorrow", "Next Week",
};
ArrayList<String> browse = new ArrayList<String>();
ArrayList<String> mPostingData = new ArrayList<String>();
Spinner s1;
ListView listview;
CustomAdapter cus;
// All static variables
static final String URL = " URL ";
// XML node keys
static final String KEY_EVENT = "event"; // parent node
static final String KEY_TITLE = "title";
static final String KEY_START_TIME = "start_time";
@override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ArrayList<HashMap<String, String>> menuItems = new ArrayList<HashMap<String, String>>();
XMLParser parser = new XMLParser();
String xml = parser.getXmlFromUrl(URL); // getting XML
Document doc = parser.getDomElement(xml); // getting DOM element
NodeList nl = doc.getElementsByTagName(KEY_EVENT);
// looping through all item nodes <item>
for (int i = 0; i < nl.getLength(); i++) {
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
Element e = (Element) nl.item(i);
// adding each child node to HashMap key => value
map.put(KEY_TITLE, parser.getValue(e, KEY_TITLE));
map.put(KEY_START_TIME, parser.getValue(e, KEY_START_TIME));
// adding HashList to ArrayList
menuItems.add(map);
}
// Adding menuItems to ListView
ListAdapter adapter = new SimpleAdapter(this, menuItems,
R.layout.list_item, new String[] { KEY_TITLE,KEY_START_TIME }, new int[] {
R.id.title,
R.id.startTime });
setListAdapter(adapter);
// selecting single ListView item
ListView lv = getListView();
lv.setOnItemClickListener(new OnItemClickListener() {
@override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String title = ((TextView) view.findViewById(R.id.title))
.getText().toString();
// Starting new intent
Intent in = new Intent(getApplicationContext(),
SingleMenuItemActivity.class);
in.putExtra(KEY_TITLE, title);
startActivity(in);
}
});
listview = (ListView) findViewById(R.id.listView1);
s1 = (Spinner) findViewById(R.id.spinner1);
for (int i = 0; i < browseby.length; i++) {
browse.add(browseby);
}
// aa = new
// ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,Category);
s1.setOnItemSelectedListener(this);
mPostingData = browse;
for (int i = 0; i < mPostingData.size(); i++) {
if (mPostingData.size() > 0)
Log.i("Datas", mPostingData.get(i));
}
cus = new CustomAdapter(this, 0);
setListAdapter(cus);
ArrayAdapter<String> aa = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, dates);
aa.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
s1.setAdapter(aa);
}
public void onItemSelected(AdapterView<?> parent, View v, int position,
long id) {
// listview.setFilterText(Category[position]);
String Text = s1.getSelectedItem().toString();
cus.getFilter().filter(Text);
cus.notifyDataSetChanged();
}
public void onNothingSelected(AdapterView<?> parent) {
// listview.setFilterText("");
}
public void onListItemClick(ListView parent, View v, int position, long id) {
Toast.makeText(this, "You have selected " + mPostingData.get(position),
Toast.LENGTH_SHORT).show();
}
class CustomAdapter extends ArrayAdapter<String> {
public void setData(ArrayList<String> mPpst) {
mPostingData = mPpst;// contains class items data.
}
@override
******public Filter getFilter() {
return new Filter() {
@override
protected void publishResults(CharSequence constraint,
FilterResults start_time) {
if (start_time.equals("2013-09-25") {
setData((ArrayList<String>) start_time.values);
} else {
setData(browse);// set original values
}
notifyDataSetInvalidated();
}******
@override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults result = new FilterResults();
if (!TextUtils.isEmpty(constraint)) {
constraint = constraint.toString();
ArrayList<String> foundItems = new ArrayList<String>();
if (browse != null) {
for (int i = 0; i < browse.size(); i++) {
if (browse.get(i).contains(constraint)) {
System.out.println("My datas" + browse.get(i));
foundItems.add(browse.get(i));
} else {
}
}
}
result.count = foundItems.size();// search results found
// return count
result.values = foundItems;// return values
} else {
result.count = -1;// no search results found
}
return result;
}
};
}
LayoutInflater mInflater;
public CustomAdapter(Context context, int textViewResourceId) {
super(context, textViewResourceId);
// TODO Auto-generated constructor stub
mInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@override
public int getCount() {
// TODO Auto-generated method stub
return mPostingData.size();
}
@override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
ViewHolder vh;
if (convertView == null) {
vh = new ViewHolder();
convertView = mInflater.inflate(R.layout.row, null);
vh.t1 = (TextView) convertView.findViewById(R.id.textView1);
convertView.setTag(vh);
} else {
// Get the ViewHolder back to get fast access to the TextView
// and the ImageView.
vh = (ViewHolder) convertView.getTag();
}
if (mPostingData.size() > 0)
vh.t1.setText(mPostingData.get(position));
return convertView;
}
}
static class ViewHolder {
TextView t1;
}
}
Click to expand...
Click to collapse
Can someone please help me out?
your help will be appreciated.
Thanks
Hi,
I am developing an android app in which i am using csv file and displaying column contents as listview its displaying as [a,b,c,d] in single row how to display them in individual row in listview.Please any one help me how to achive this.
This is my csv file reading code using hashcode.
Code:
public static Map<String,ArrayList<String>> parseCsv(InputStreamReader reader, String separator, boolean hasHeader) throws IOException {
Map<String,ArrayList<String> > values = new LinkedHashMap<String,ArrayList<String>>();
List<String> columnNames = new LinkedList<String>();
BufferedReader br = null;
br = new BufferedReader(reader);
String line;
int numLines = 0;
while ((line = br.readLine()) != null) {
//if (StringUtils.isNotBlank(line)) {
//if (!line.startsWith("#")) {
String[] tokens = line.split(separator);
if (tokens != null) {
for (int i = 0; i < tokens.length; ++i) {
if (numLines == 0) {
columnNames.add(hasHeader ? tokens[i] : ("row_"+i));
} else {
ArrayList<String> column = values.get(columnNames.get(i));
if (column == null) {
column = new ArrayList<String>();
}
column.add(tokens[i]);
values.put(columnNames.get(i), column);
}
}
}
++numLines;
}
// }//
// }//
return values;
listview code is:
Code:
oslist.add(values);
ListView list = (ListView) findViewById(R.id.studentnames);
String name="name";
// Add it listview
ListAdapter adapter = new SimpleAdapter(this,
oslist, R.layout.student_list, new String[] { name }, new int[] { R.id.name});
list.setAdapter(adapter);
Good day to you all. I have problems with my application, no synchronization with db. An error occurs when you try to log in or register, and the error code indicates a request raw.query.
Code my db.
Code:
CREATE TABLE `logpass` (
`_id` INTEGER PRIMARY KEY AUTOINCREMENT,
`login` TEXT,
`pass` TEXT,
`Name` TEXT,
`Surname` TEXT,
`Groupi` TEXT
);
Code DataBaseHelper
Code:
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.sql.SQLException;
import android.content.ContentValues;
import android.database.Cursor;
public class DataBaseHelper extends SQLiteOpenHelper {
public static String DB_NAME = "auth.db";
private static final int SCHEMA = 1;
static final String TABLE = "logpass";
private static String DB_PATH;
public static final String _id ="_id";
public static final String login = "login";
public static final String pass = "pass";
public static final String Name = "Name";
public static final String Surname = "Surname";
public static final String Groupi = "Groupi";
public SQLiteDatabase database;
private Context myContext;
public DataBaseHelper(Context context) {
super(context, DB_NAME, null, SCHEMA);
this.myContext=context;
DB_PATH = "/data/data/com.example.nikita.myapplication/databases/";
}
@Override
public void onCreate(SQLiteDatabase db) {
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
public boolean insert(String login,String pass,String Name,String Surname,String Groupi){
SQLiteDatabase database = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put("login",login);
contentValues.put("pass",pass);
contentValues.put("Name",Name);
contentValues.put("Surname",Surname);
contentValues.put("Groupi",Groupi);
long ins = database.insert( "logpass", null, contentValues);
if (ins==-1) return false;
else return true;
}
public Boolean chklogin(String login){
SQLiteDatabase database = this.getReadableDatabase();
Cursor cursor = database.rawQuery("Select * from logpass where login=?",new String[]{login});
if (cursor.getCount()>0) return false;
else return true;
}
//LoginPassword verification
public Boolean loginpassword(String login,String pass){
SQLiteDatabase database = this.getReadableDatabase();
Cursor cursor = database.rawQuery("select * from logpass where login=? and password=?",new String[]{login,pass});
if (cursor.getCount()>0) return true;
else return false;
}
public void create_db(){
InputStream myInput = null;
OutputStream myOutput = null;
try {
File file = new File(DB_PATH + DB_NAME);
if (!file.exists()) {
this.getReadableDatabase();
myInput = myContext.getAssets().open(DB_NAME);
String outFileName = DB_PATH + DB_NAME;
myOutput = new FileOutputStream(outFileName);
byte[] buffer = new byte[1024];
int length;
while ((length = myInput.read(buffer)) > 0) {
myOutput.write(buffer, 0, length);
}
myOutput.flush();
myOutput.close();
myInput.close();
}
}
catch(IOException ex){
}
}
public void open() throws SQLException {
String path = DB_PATH + DB_NAME;
database = SQLiteDatabase.openDatabase(path, null,
SQLiteDatabase.OPEN_READONLY);
}
@Override
public synchronized void close() {
if (database != null) {
database.close();
}
super.close();
}
}
And code Main Activity (where to log in)
Code:
public class MainActivity extends AppCompatActivity {
Button b1, b2;
EditText e1, e2;
DataBaseHelper database;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
database = new DataBaseHelper(this);
b1 = (Button) findViewById(R.id.accept);
e1 = (EditText) findViewById(R.id.email);
e2 = (EditText) findViewById(R.id.pass);
b1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String login = e1.getText().toString();
String password = e2.getText().toString();
Boolean Chkloginpass = database.loginpassword(login, password);
if
(Chkloginpass == true) {
Toast.makeText(getApplicationContext(), "Successful log in", Toast.LENGTH_SHORT).show();
b1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(MainActivity.this,Main3Activity.class);
startActivity(i);
}
});
} else
Toast.makeText(getApplicationContext(), "Inccorect log or pass", Toast.LENGTH_SHORT).show();
}
});
b2 = (Button) findViewById(R.id.register);
b2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v){
Intent i = new Intent(MainActivity.this, LoginLoginActivity.class);
startActivity(i);
}
});
}
}
Also i can send full database