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Random number Java


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Generate random number Android Java example source code.

		Random rand = new Random();
		int i = rand.nextInt() % 256; // range -255  +255
		System.out.print(i + "

"); // -184 i = Math.abs(rand.nextInt() % 12); // range 0 +11 System.out.print(i); // 7



// Math.random() start with 0.  e.g. 0.35981234 
int nRan = (int) (Math.random()*10); // 0 - 10

// nextDouble(), nextFloat(), nextInt(), nextLong() returns 0 - 10
import java.util.Random;´

Random r = new Random();
int nRan = r.nextInt(); // 0 - 10
double dRan = r.nextDouble() * 10; // e.g. 7.496285271597397

nextDouble – return 0 - 1
nextFloat – same as double
nextInt –  -2147483648  +2147483647
nextLong –  -922337203685775808  +9223372036854775807
nextGaussian –  0.0 aberation 1.0.

397LW NO topic_id




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Další témata ....(Topics)


49

Emulator window was out of view and was recentred - Android emulator warning | emulator-window-was-out-of-view-and-was-recentred-android-emulator-warning


Emulator window was out of view and was recentred
Emulator] WARNING: Data partition already in use. Changes will not persist!
Emulator] WARNING: SD Card image already in use: C:\Documents and Settings\user_name\.android\avd\hvga21_up1_7.avd/sdcard.img
Emulator] WARNING: Cache partition already in use. Changes will not persist!

Basic step
Try restart Eclipse if using from menu File->Restart

Other solutions

Solution 1: try restart ADB server
//android.okhelp.cz/how-quickly-restart-adb-exe-adb-server-android-emulator-example/


Solution 2:

Delete Run Configuration


//android.okhelp.cz/android-emulator-wont-run-application-started-from-eclipse/





Solution 3:
Try delete:

c:\Documents and Settings\user_name\.android\avd\my_avd.avd\cache.img
c:\Documents and Settings\user_name\.android\avd\my_avd.avd\userdata-qemu.img



Try solution 4:
Eclipse menu select Window->Preferences->Android

Windows 32

FROM: C:\Program Files\Android\android-sdk
TO: C:\PROGRA~1\Android\android-sdk

Windows 64

FROM: C:\Program Files (x86)\Android\android-sdk
TO: C:\PROGRA~2\Android\android-sdk
176

HTC Desire HD | htc-desire-hd


HTC Desire HD cena od 7 000 KCZ Kč (únor.2012)
HTC Desire HD je chytrý telefon běžící na operačním systému Android.
HTC Desire HD je (22.února2012) druhým nejpoužívanějším chytrým telefonem u programu Sky Map viz tabulka.

Smartphone má hliníkový unibody design, vybaven je Androidem 2.2 (Froyo) a HTC Sense displayem. Na zadní straně jsou dvě plastové krytky, jedna obsahuje baterii, druhá SIM kartu a paměťovou kartu microSDHC. Telefon je vybaven 4,3 palcovým WVGA LCD TFT dotykovým displayem, 8 megapixelovým fotoaparátem (lze nahrávat 720p video), podpora pro HSPA / W-CDMA a quad-band GSM / GPRS / EDGE.


Telefon je vybaven 1 GHz CPU Scorpion MSM8255 procesorem. Tato druhá generace Snapdragon procesoru má nízkou spotřebu energie.

HTC HD má 768 MB RAM a 1,5 GB interní paměti flash. K dispozici je také slot pro microSDHC / XC kartu s kapacitou až 32 GB dat.

HTC Desire HD photo pic image
samsung galaxy s2
Zdroj obrázku: wikipedia
134

Draw Oval Android basic example | draw-oval-android-basic-example


drawOval(), setStrokeWidth(), setStyle()


public class MainActivity extends Activity {
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(new SampleView(this));
	}

	private static class SampleView extends View {

		// CONSTRUCTOR
		public SampleView(Context context) {
			super(context);
			setFocusable(true);

		}

		@Override
		protected void onDraw(Canvas canvas) {

			canvas.drawColor(Color.CYAN);
			Paint p = new Paint();
			// smooths
			p.setAntiAlias(true);
			p.setColor(Color.RED);
			p.setStyle(Paint.Style.STROKE); 
			p.setStrokeWidth(4.5f);
			// opacity
			//p.setAlpha(0x80); //
 
			canvas.drawOval(new RectF(50, 50, 20, 40), p);;
		}

	}
}
252

How get bitmap dimension without loading Android example | how-get-bitmap-dimension-without-loading-android-example


Bitmap Width, Height without memory allocation:

BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeResource(getResources(), R.id.myimage, options);
// now opts.outWidth and opts.outHeight are the dimension of the
// bitmap, even though Bitmap is null
int imageHeight = options.outHeight;
int imageWidth = options.outWidth;
String imageType = options.outMimeType;
166

Multiple substitutions specified in non-positional format | multiple-substitutions-specified-in-non-positional-format


Multiple substitutions specified in non-positional format;did you mean to add the formatted="false" attribute?
Wiktionary, WiktionarySimple
location C:\documents\WiktionarySimple\res\values\strings.xml
Issue:


    <string name="template_user_agent">"%s/%s (Linux; Android)"</string>
    <string name="template_wotd_title">"Wiktionary:Word of the day/%s %s"</string>
    <string name="template_define_url">"//en.wiktionary.org/wiki/%s"</string>

Solution:

   <string name="template_user_agent" translatable="false">"%1$s/%2$s (Linux; Android)"</string>
    <string name="template_wotd_title">"Wiktionary:Word of the day/%1$s %2$s"</string>
    <string name="template_define_url" translatable="false">"//en.wiktionary.org/wiki/%s"</string>



Editace: 2013-12-09 10:54:07
Počet článků v kategorii: 397
Url:random-number-java

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