In manifest
<activity
. . . .
.
android:theme="@android:style/Theme.Translucent.NoTitleBar.Fullscreen"
. . . . . . .
>
</activity>
Thursday, February 21, 2013
How to create a splash screen
public class SplashActivity extends Activity {
private static String TAG =
SplashActivity.class.getName();
private static long SLEEP_TIME = 5; // Sleep for some time
@Override
protected void onCreate(Bundle
savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash);
// Start timer and launch main activity
IntentLauncher launcher = new
IntentLauncher();
launcher.start();
}
private class IntentLauncher extends Thread
{
@Override
/**
* Sleep for some time and than start new
activity.
*/
public void run() {
try {
// Sleeping
Thread.sleep(SLEEP_TIME*1000);
} catch (Exception e) {
Log.e(TAG, e.getMessage());
}
// Start main activity
Intent intent = new
Intent(SplashActivity.this,mainactivity.class);
SplashActivity.this.startActivity(intent);
SplashActivity.this.finish();
}
}
}
In manifest
<activity
. . . . . .
android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
. . . . . . . . . .
>
</activity>
Saturday, January 26, 2013
Create custom dialog :
code:
final Dialog d = new Dialog(myActivity.this);
d.setContentView(R.layout.mylayout);
d.setTitle("my title");
final EditText edit = (EditText)d.findViewById(R.id.txtedit);
Button btn = (Button)d.findViewById(R.id.txtbtn);
d.show();
layout:
<Button
android:id="@+id/btnAdd"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<EditText
android:id="@+id/txtItem2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="text" />
Change color of alertdialog button
Button b = dialogf.getButton(DialogInterface.BUTTON_NEGATIVE);
if(b != null){
b.setBackgroundDrawable(getResources().getDrawable(R.drawable.loginbutton));
b.setTextColor(getResources().getColor(android.R.color.white));
}
Iterate through array values and insert to sqlite db:
String [] arrayA ={"a","b","c"};
Value[] adst =new Value[arrayA.length];
for( int i = 0; i < arrayA.length; i++)
{
String something = arrayA[i];
Value dist =new Value();
dist.setname(something);
adst[i]=dist;
}
valuedao.insertInTx(adst);
Removing duplicate rows from sqlite table
db.execSQL("delete from TABLENAME where rowid not in (select min(rowid) from TABLENAME group by COLOUMNNAME);");
Count number of rows in a sqlite table
long numRows = DatabaseUtils.queryNumEntries(db,"Table_name");
Get image from sdcard and put in imageview
File imageFile2 =new File(Environment.getExternalStorageDirectory(),"/images/"+imagef2);
if(imageFile2!=null)
{
Bitmap bitmap2 = BitmapFactory.decodeFile(imageFile2.getAbsolutePath());
imageview.setImageBitmap(bitmap2);
}
Delete image from sdcard:
File file =new File(Environment.getExternalStorageDirectory(),yourfilename);
file.delete();
Populate AlertDialog with CheckBoxes
boolean[] isChecked = null;
final List<CharSequence> selectedItems = new ArrayList<CharSequence>();
final CharSequence[] others = {"value1","value2", "value3", "value4" };
AlertDialog.Builder buildnew = new AlertDialog.Builder(this);
buildnew .setTitle("Select ");
buildnew .setMultiChoiceItems(others,isChecked, new DialogInterface.OnMultiChoiceClickListener() {
public void onClick(DialogInterface dialog, int which, boolean isChecked) {
if(isChecked)
{ selectedItems.add(others[which]);
}
else
{
selectedItems.remove(others[which]);
}
StringBuilder stringBuilder = new StringBuilder();
for(CharSequence item : selectedItems)
stringBuilder.append(item + ",");
edittext.setText(stringBuilder.toString());
}
});
buildnew.setPositiveButton("Done", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which)
{
dialog.dismiss();
}
});
buildnew .create();
buildnew .show();
Sunday, January 20, 2013
Create Excel file and store in sdcard
Create an excel file in android :
Download jxl.jar from
try the following code in your class file
an excel file will be created in sdcard
String Fnamexls="testfile" + ".xls";
File sdCard = Environment.getExternalStorageDirectory();
File directory = new File (sdCard.getAbsolutePath() + "/newfolder");
directory.mkdirs();
File file = new File(directory, Fnamexls);
WorkbookSettings wbSettings = new WorkbookSettings();
wbSettings.setLocale(new Locale("en", "EN"));
WritableWorkbook workbook;
try {
int a = 1;
workbook = Workbook.createWorkbook(file,
wbSettings);
//workbook.createSheet("Report",
0);
WritableSheet sheet =
workbook.createSheet("First Sheet", 0);
Label label = new Label(0, 2, "SECOND");
Label label1 = new Label(0,1,"first");
Label label0 = new Label(0,0,"HEADING");
Label label3 = new Label(1,0,"Heading2");
Label label4 = new Label(1,1,String.valueOf(a));
try {
sheet.addCell(label);
sheet.addCell(label1);
sheet.addCell(label0);
sheet.addCell(label4);
sheet.addCell(label3);
} catch (RowsExceededException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (WriteException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
workbook.write();
try {
workbook.close();
} catch (WriteException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//createExcel(excelSheet);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
export sqlite to excel
http://sourceforge.net/projects/sqlitebrowser/
- download sqlitebrowser
Open Sqlitedatabrowser
File open database- select ur db file
After it is opened
Go to file – export – table as csv file
Export table as csv file
Select table name –click Export
Open excel
Goto file - Open
Select -All files in the right side and choose ur file
Then select Delimited
Next –
Select Comma also as delimiter
Next
Finish
Now you can see the db fields in excel sheet
Now go to file – save as – excel
Thus your db is converted to excel.
Export sqlitedb to excel
download software from this link
Select
sqlitedatabase - in
source
db location - in
database
next
Select
Msexcel – in destination
Location where you want to store the excel sheet - in database
Next
Select all tables
Su bmit
Migration completed message is displayed , just ignore the
remaining.
Exit
Convert sqlite to excel
Connect
to database:
-Database group – local host
-Next
-Ready
-Ctrl+shft+C
Click the object browser(marked in red)
U will find all the tables listed
Right click on the respective table –
Data Management – export data – xcel
Select the format
Export
install apk file to emulator from command line:
first add environment variable (right click computer –properties - advanced settings – environment variable)
PATH – path of adb – (ex:d:\android\platform-tools)
go to command prompt
cd (adb.exe path)location of adb (ex: cd d:\android\platform-tools )
Adb devices – shows list of devices present (emulator which Is active)
Adb install “apk location” (ex: c:\users\desktop\sample.apk)
General error :
- failure install failed older sdk
Emulator api level is lesser than the target api declared in manifest – change it
Slide-in Animation
slide- in slide out animations for activity transition(left to right):
Intent in = new intetn(this,bactivity);
Startactivity(i);
animateactivity.this.overridePendingTransition(R.anim.slide-in-left,R.anim.slide-out-right);
check if sd card is available:
public static boolean checkStorageAvailability() {
return Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED);
}
save image in sdcard
start camera intent and save image in sdcard:
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == IMAGE_CAPTURE)
{
if (resultCode == RESULT_OK)
{
imageName = String.valueOf(System.currentTimeMillis()) + ".jpg";
}
}
}
public void startCamera()
{
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
imageName = "newImage"+String.valueOf(System.currentTimeMillis()) + ".jpg";
File file = new File(Environment.getExternalStorageDirectory().getPath(), “/images/" +imageName);
imageUri = Uri.fromFile(file);
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
startActivityForResult(intent, IMAGE_CAPTURE);
}
Check if internet is available:
//return true if the application can access the internet
private static boolean haveInternet(Context context) {
NetworkInfo info = ((ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE)).getActiveNetworkInfo();
if (info == null || !info.isConnected())
{
return false;
}
if (info.isRoaming()) {
return true;
}
return true;
}
Saturday, January 19, 2013
limit Editext values
Set limit on number of digits entered in edittext :
In layout
Android:maxLength=”2”
Hide soft keyboard
Hide soft keyboard in edit text:
edit = (EditText) findViewById(R.id.txtedit);
InputMethodManager im = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
im.hideSoftInputFromWindow(edit.getWindowToken(), 0);
Go to gps settings screen
Go to gps settings screen (to check gps availablity):
Intent in = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(in);
Disable Landscape Mode
disable landscape mode for all or one activity:
in manifest
<android . . . >
. . .
<manifest . . . >
. . .
<application>
<activity android:name=".MyActivity"
android:screenOrientation="portrait"
android:configChanges="keyboardHidden|orientation">
</activity>
</application>
</manifest>
</android>
in activity oncreate
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}
Get Current date with timestamp:
get current date with timestamp as a string ---
string date = (DateFormat.format("dd-MM-yyyy hh:mm:ss", new java.util.Date()).toString());
Get only time –
String mytime = java.text.DateFormat.getTimeInstance().format(Calendar.getInstance().getTime());
Get only date -
String mydate =java.text.DateFormat.getDateTimeInstance().format(Calendar.getInstance().getTime());
DatePicker widget
call the date dialog by
showDialog(DATE_DIALOG_ID);
declare constant
static final int DATE_DIALOG_ID = 333;
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case DATE_DIALOG_ID:
// set date picker as current date
return new DatePickerDialog(this, datePickerListener, year, month,
day);
}
return null;
}
private DatePickerDialog.OnDateSetListener datePickerListener = new DatePickerDialog.OnDateSetListener() {
// when dialog box is closed, below method will be called.
public void onDateSet(DatePicker view, int selectedYear, int selectedMonth, int selectedDay)
{
year = selectedYear;
month = selectedMonth;
day = selectedDay;
editext.setText(new StringBuilder()
// Month is 0 based, just add 1
.append(day).append("/").append(month + 1).append("/")
.append(year).append(" "));
}
};
Wednesday, January 16, 2013
check if gps is on or off:
public static boolean hasGPSCapability(Context context) {
final LocationManager mgr = (LocationManager)context.getSystemService(Context.LOCATION_SERVICE);
boolean status = mgr.isProviderEnabled(LocationManager.GPS_PROVIDER);
return status;
android on back button pressed
public void onBackPressed() {
AlertDialog.Builder builder = new AlertDialog.Builder(yourActivity.this);
builder.setMessage("Are you sure you want to exit?")
.setCancelable(false)
.setPositiveButton("Yes",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Intent home = new Intent(yourActivity.this,yourhomeActivity.class);
startActivity(home);
}
})
.setNegativeButton("No", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alert = builder.create();
alert.show();
}
};
go to phone home screen on back pressed
public void onBackPressed() {
AlertDialog.Builder builder = new AlertDialog.Builder(MenuActivity.this);
builder.setMessage("Are you sure you want to exit?")
.setCancelable(false)
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
})
.setNegativeButton("No", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
builder.create();
builder.show();
}
};
populate alertdialog with array
Alertdialog popup with list values:
final CharSequence[] digitList = {"1", "2", "3","4","5","6" };
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Select");
builder.setSingleChoiceItems(digitList, -1, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
editest.setText(digitList[which].toString());
dialog.dismiss();
}
});
builder.create();
builder.show();
Tuesday, January 8, 2013
Reading exif info
How to get
the Exif info of an image :
Private
string selected imagepath;
if (resultCode == RESULT_OK)
imageName =
String.valueOf(System.currentTimeMillis()) +
".jpg";
Uri selectedImageUri =
data.getData();
selectedImagePath
= getRealPathFromURI(selectedImageUri);
Log.w("Path
of Capture image", "Camera Image Path :"+ selectedImagePath);
Getexifinfo();
}
}
public String getRealPathFromURI(Uri contentUri) {
try {
String[] proj =
{ MediaStore.Images.Media.DATA
};
Cursor cursor =
managedQuery(contentUri, proj, null,
null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
catch (Exception e) {
return contentUri.getPath();
}}
private void getexifinfo()
{
try {
ExifInterface
exif = new
ExifInterface(selectedImagePath);
StringBuilder builder
= new StringBuilder();
builder.append("Date &
Time: " + getExifTag(exif,ExifInterface.TAG_DATETIME) + "\n\n");
builder.append("Flash: " +
getExifTag(exif,ExifInterface.TAG_FLASH) + "\n");
builder.append("Focal Length:
" +
getExifTag(exif,ExifInterface.TAG_FOCAL_LENGTH) + "\n\n");
builder.append("GPS
Datestamp: " + getExifTag(exif,ExifInterface.TAG_FLASH) + "\n");
builder.append("GPS Latitude:
" +
getExifTag(exif,ExifInterface.TAG_GPS_LATITUDE) + "\n");
builder.append("GPS Latitude
Ref: " + getExifTag(exif,ExifInterface.TAG_GPS_LATITUDE_REF) + "\n");
builder.append("GPS
Longitude: " + getExifTag(exif,ExifInterface.TAG_GPS_LONGITUDE) + "\n");
builder.append("GPS Longitude
Ref: " + getExifTag(exif,ExifInterface.TAG_GPS_LONGITUDE_REF) + "\n");
builder.append("GPS
Processing Method: " + getExifTag(exif,ExifInterface.TAG_GPS_PROCESSING_METHOD) + "\n");
builder.append("GPS
Timestamp: " + getExifTag(exif,ExifInterface.TAG_GPS_TIMESTAMP) + "\n\n");
builder.append("Image Length:
" +
getExifTag(exif,ExifInterface.TAG_IMAGE_LENGTH) + "\n");
builder.append("Image Width:
" +
getExifTag(exif,ExifInterface.TAG_IMAGE_WIDTH) + "\n\n");
builder.append("Camera Make:
" +
getExifTag(exif,ExifInterface.TAG_MAKE) + "\n");
builder.append("Camera Model:
" +
getExifTag(exif,ExifInterface.TAG_MODEL) + "\n");
builder.append("Camera
Orientation: " + getExifTag(exif,ExifInterface.TAG_ORIENTATION) + "\n");
builder.append("Camera White
Balance: " + getExifTag(exif,ExifInterface.TAG_WHITE_BALANCE) + "\n");
TextView info = (TextView)findViewById(R.id.exifinfo);
info.setText(builder.toString());
(for latitude ,
longitude the values are retrieved as degrees ,minutes, seconds so we convert
to degreee )
Float
Latitude, Longitude;
String
attrLATITUDE = exif.getAttribute(ExifInterface.TAG_GPS_LATITUDE);
//this gives
the latitude in degrees minutes seconds
String attrLATITUDE_REF =
exif.getAttribute(ExifInterface.TAG_GPS_LATITUDE_REF);
String attrLONGITUDE = exif.getAttribute(ExifInterface.TAG_GPS_LONGITUDE);
String attrLONGITUDE_REF =
exif.getAttribute(ExifInterface.TAG_GPS_LONGITUDE_REF);
//convert to degrees
if(attrLATITUDE_REF.equals("N")){
Latitude = convertToDegree(attrLATITUDE);
}
else{
Latitude = 0 -
convertToDegree(attrLATITUDE);
}
if(attrLONGITUDE_REF.equals("E")){
Longitude = convertToDegree(attrLONGITUDE);
}
else{
Longitude = 0 -
convertToDegree(attrLONGITUDE);
}
Toast.makeText(getApplicationContext(),latitude+longitude+ Toast.LENGTH_LONG).show();
}
catch (IOException e) {
//
TODO Auto-generated catch block
e.printStackTrace();
}
}
private Float convertToDegree(String
stringDMS){
Float result = null;
String[] DMS = stringDMS.split(",",
3);
String[] stringD = DMS[0].split("/",
2);
Double D0 = new Double(stringD[0]);
Double D1 = new Double(stringD[1]);
Double FloatD = D0/D1;
String[] stringM = DMS[1].split("/",
2);
Double M0 = new Double(stringM[0]);
Double M1 = new Double(stringM[1]);
Double FloatM = M0/M1;
String[] stringS = DMS[2].split("/",
2);
Double S0 = new Double(stringS[0]);
Double S1 = new Double(stringS[1]);
Double FloatS = S0/S1;
result = new Float(FloatD + (FloatM/60) + (FloatS/3600));
return
result;
};
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