Compressing converting a bitmap to PNG format Android example
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public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(new SampleView(this));
}
private static Bitmap codec(Bitmap src, Bitmap.CompressFormat format,
int quality) {
ByteArrayOutputStream os = new ByteArrayOutputStream();
src.compress(format, quality, os);
byte[] array = os.toByteArray();
return BitmapFactory.decodeByteArray(array, 0, array.length);
}
private static class SampleView extends View {
// CONSTRUCTOR
public SampleView(Context context) {
super(context);
setFocusable(true);
}
@Override
protected void onDraw(Canvas canvas) {
Paint paint = new Paint();
canvas.drawColor(Color.YELLOW);
Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.flower_blue);
Bitmap bPNGcompress = codec(bmp, Bitmap.CompressFormat.PNG, 0);
int h = bmp.getHeight();
canvas.drawBitmap(bmp, 10,10, paint);
canvas.drawBitmap(bPNGcompress, 10,10 + h + 10, paint);
}
}
}
397LW NO topic_id
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Další témata ....(Topics)
Locale lc = Locale.getDefault(); // default now locale on device
String sCountry = lc.getCountry(); // CZ
lc = new Locale("fr","FR"); //FRANCE .. Locale(language, country);
String sCountry2 = lc.getDisplayCountry(); // Francie
Locale locale = Locale.GERMAN;
String sCountry3 = locale.getDisplayCountry(); // ""
Locale locale = Locale.GERMAN;
DateFormat formatter = new SimpleDateFormat("HH:mm:ss zzzz", locale);
String s = formatter.format(new Date());//13:40:39 GMT+00:00
// array of locales
Locale[] locales = { new Locale("fr", "FR"), new Locale("de", "DE"),
new Locale("en", "US") };
Locale locale = Locale.US;
// for date
DateFormat dateFormatterEurope = DateFormat.getDateInstance(DateFormat.DEFAULT,
Locale.GERMANY);
Calendar myCalendar = Calendar.getInstance();
String sDate = dateFormatterEurope.format(myCalendar.getTime());
final byte[] langBytes = locale.getLanguage().getBytes(Charsets.US_ASCII);
// UTF-8 most widely used text format for to properly display of text
final Charset utfEncoding = Charsets.UTF_8;
String text = "ěščřžýáíéůú";
final byte[] textBytes = text.getBytes(utfEncoding);
// other Locale
CANADA
CANADA_FRENCH
CHINA
CHINESE
ENGLISH
FRANCE
FRENCH
GERMAN
GERMANY
ITALIAN
ITALY
JAPAN
JAPANESE
KOREA
KOREAN
PRC // Locale constant for zh_CN.
ROOT // Locale constant for the root locale.
SIMPLIFIED_CHINESE
TAIWAN
TRADITIONAL_CHINESE Locale constant for zh_TW.
UK
US
Try this trick.
In AndroidManifest - activity tag write this code
App hold data of a views if will to rotation of device.
In AndroidManifest - activity tag write this code
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"
App hold data of a views if will to rotation of device.
<activity
android:name=".Tests_Activity"
android:label="@string/app_name"
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize" />
Close one project:¨
-right click on project
- select Close project
Close more projects:
- right click on project
- select Close Unrelated Projects
Hide closed projects:
- package explorer
- view menu
- select Closed projects
-right click on project
- select Close project
Close more projects:
- right click on project
- select Close Unrelated Projects
Hide closed projects:
- package explorer
- view menu
- select Closed projects
onSaveInstanceState, onRestoreInstanceState life cycle if screen orientation changed from log file.
Diagram of life cycle onSaveInstanceState, onRestoreInstanceState
[caption id="attachment_1169" align="alignleft" width="229" caption="Life cycle onRestoreInstanceState"]
[/caption]
// starts activity
15:27:12.801: INFO/onCreate(1828): onCreate()
15:27:12.811: INFO/onStart(1828): onStart()
15:27:12.821: INFO/onResume(1828): onResume()
// activity is running
15:27:33.651: DEBUG/dalvikvm(307): GC_EXPLICIT freed 186K, 53%
free 2770K/5831K, external 981K/1038K, paused 99ms
// change emulator state Ctrl+F11 landscape, portrait
15:27:40.427: INFO/ActivityManager(74): Config changed:
{ scale=1.0 imsi=310/260 loc=en_US touch=3 keys=2/1/2 nav=3/1 orien=2 layout=18 uiMode=17 seq=64}
// saved all variable values if need
15:27:40.581: INFO/onSaveInstanceState(1828): onSaveInstanceState()
15:27:40.602: INFO/onPause(1828): onPause()
15:27:40.612: INFO/onStop(1828): onStop()
15:27:40.631: INFO/onDestroy(1828): onDestroy()
// activity goes back to onCreate !!!!!!!!!
15:27:40.692: INFO/onCreate(1828): onCreate()
15:27:40.701: INFO/onStart(1828): onStart()
// restore all saved values of variables
15:27:40.711: INFO/onRestoreInstanceState(1828): onRestoreInstanceState()
// you can using saved values by onSaveInstanceState() in onResume
15:27:40.721: INFO/onResume(1828): onResume()
Diagram of life cycle onSaveInstanceState, onRestoreInstanceState
[caption id="attachment_1169" align="alignleft" width="229" caption="Life cycle onRestoreInstanceState"]
[/caption]While cycle Java basic example with array of strings.
MainClass.java
MainClass.java
public class MainClass {
public static void main(String[] arg) {
String[] arrayOfString = { "Hello", "people", "hello", "world!" };
int i = 0;
while ( i < arrayOfString.length ){
System.out.println(arrayOfString[i]);
i++;
}
}
}
Editace: 2013-12-09 13:09:31
Počet článků v kategorii: 397
Url:compressing-converting-a-bitmap-to-png-format-android-example
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