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Eclipse ADT plugin not recent graphical layout editor


Click to Android version combobox - drop down menu and select your version, which just using (have instaled). For example: You updated ADT by SDK manager, but forget to update Android version. You can use lower version from drop down menu, which using your project, or do update of Android by SDK manager.
adt-plugin-not-recent

397LW NO topic_id



Další témata ....(Topics)


255

Play Sound Android Example | play-sound-android-example



import android.content.Context;
import android.media.AudioManager;
import android.media.SoundPool;

public class SoundManager
{
  private SoundPool soundPool;
  private int[] sm;
  Context context;

  public SoundManager(Context context) {
    this.context = context;
    soundPool = new SoundPool(4, AudioManager.STREAM_MUSIC, 0);
    sm = new int[2];
    // fill your sounds
    sm[0] = soundPool.load(context, R.raw.my_sound1, 1);
    sm[1] = soundPool.load(context, R.raw.my_sound2, 1);
  }

  public final void playSound(int sound) {
      AudioManager mgr = (AudioManager)context.getSystemService(
          Context.AUDIO_SERVICE);  
      float streamVolumeCurrent =
          mgr.getStreamVolume(AudioManager.STREAM_MUSIC);
      float streamVolumeMax = mgr.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
      float volume = streamVolumeCurrent / streamVolumeMax;
      soundPool.play(sm[sound], volume, volume, 1, 0, 1f);
  }

  public final void cleanUpIfEnd() {
    sm = null;
    context = null;
    soundPool.release();
    soundPool = null;
  }
}
8

Display screen size resolution density dimension Android | display-screen-dimension


Get display, screen resolution - dimension Android phone development example source code.

 Display display = getWindowManager().getDefaultDisplay();
int nWidth = display.getWidth();
int nHeight = display.getHeight();

          DisplayMetrics metrics = new DisplayMetrics();
            getWindowManager().getDefaultDisplay().getMetrics(metrics);
            //get density per inch for example: 120 , 160 , 240
            mXDpi = metrics.xdpi; // 160 The exact physical pixels per inch of the screen in the X dimension. 
            mYDpi = metrics.ydpi;

// density
int nDensity = metrics.densityDpi; // 160 screen density expressed as dots-per-inch

          float  mMetersToPixelsX = mXDpi / 0.0254f; // 1 inch == 0.0254 metre
          float  mMetersToPixelsY = mYDpi / 0.0254f;
          
// Resolution
// The total number of physical pixels on a screen.
int wPix = metrics.widthPixels; // 320 The absolute width of the display in pixels.
int hPix = metrics.heightPixels; // 480 The absolute height of the display in pixels.
int nWidthDisplay = (wPix < hPix)? wPix : hPix;

float nWidthScreenInInch = wPix / mXDpi; //320 / 160 == 2.0 in inch.
float nHeightScreenInInch = hPix / mYDpi; //480 / 160 == 3.0 in inch.

// for example:
// density 120 per inch
//width 320 pix / 120 dpi == width 2.66 inch
//height 480 pix / 120 dpi == height 4.0 inch 

// density 240 per inch
//width 320 pix / 240 dpi == width 1.33 inch
//height 480 pix / 240 dpi == height 2.0 inch 




Example:
HTC Desire HD
11 (4.3) Diagonal cm (in)
480×800 Resolution
85 (217) ppcm (PPI - Pixels per inch)

480 / 217 = 2.21 inch
800 / 217 = 3.69 inch
Math.sqrt( 2.21*2.21 + 3.69 * 3.69) = 4.3 inch - diagonal

//en.wikipedia.org/wiki/Pixels_per_inch
//en.wikipedia.org/wiki/Dots_per_inch

Typical screen widths:

320dp: a typical phone screen (240x320 ldpi, 320x480 mdpi, 480x800 hdpi, etc).
480dp: a tweener tablet like the Streak (480x800 mdpi).
600dp: a 7” tablet (600x1024 mdpi).
720dp: a 10” tablet (720x1280 mdpi, 800x1280 mdpi, etc).


Emulator skins in the Android SDK
//developer.android.com/guide/practices/screens_support.html









































Low density (120), ldpi

Medium density (160), mdpi

High density (240), hdpi

Extra high density (320), xhdpi

Small screen
QVGA (240x320) 480x640

Normal screen
WQVGA400 (240x400)

WQVGA432 (240x432)
HVGA (320x480) WVGA800 (480x800)

WVGA854 (480x854)

600x1024
640x960

Large screen
WVGA800** (480x800)

WVGA854** (480x854)
WVGA800* (480x800)

WVGA854* (480x854)

600x1024

Extra Large screen
1024x600 WXGA (1280x800)

1024x768
1280x768
1536x1152
1920x1152

1920x1200
2048x1536
2560x1536

2560x1600
* To emulate this configuration, specify a
custom density of 160 when creating an AVD that uses a WVGA800 or WVGA854 skin.

** To emulate this configuration, specify a custom density of 120 when creating an AVD that
uses a WVGA800 or WVGA854 skin.

† This skin is available with the Android 3.0 platform
18

long in java example | long-in-java-example


Android development

long is 64 bit signed type and used when int is not large enough to hold the value.

long je celé číslo 64 bitů -9223372036854775808 +9223372036854775807 a používá se tam, kde typ int není schopen pojmout takovou hodnotu čísla.


		// declaration and assignment of value type long
		long n = 22337203685477580L;
		// print formated value
		System.out.printf("The value of x is %d%n", n); // 22337203685477580
		System.out.format("%+,8d%n%n", n); // +22 337 203 685 477 580

		// declaring more variables in single statement
		long lo1 = 12L, lo2 = 56, lo3 = 1455555555589L;

		// long range of value
		System.out.println(Long.MAX_VALUE); // 9223372036854775807
		System.out.println(Long.MIN_VALUE); // -9223372036854775808

		// check if a string is a valid number in Java example
		// convert string to long Java example
		String sLong = "1288888888888888";
		long longParse = Long.parseLong(sLong);

		// convert strings to numbers
		long longFromString = (Long.valueOf(sLong)).longValue();

		// long to string in Java example code
		Long longObj = new Long(229999999999L);
		String str = longObj.toString();
		// else
		Long longS = 888888888888L;
		String strLong = longS.toString();

		// compare two long variables
		Long longComp1 = 5555L;
		if (longComp1.equals(55555555L))
			System.out.print("true");

		// compares the two specified long values in Java example

		int i = longS.compareTo(444444L); // -1 first < second
		// 0 first == second
		// 1 first > second
		System.out.print(i);
249

Snow Text Effects Paint.NET | snow-text-effects-paint-net


For some graphics you can use Paint.NET editor.
//www.getpaint.net/
How create Snow Effects on Text by 1 minute show this video:

244

Replace graphic accent diacritic Java Function | replace-graphic-accent-java-function


Replace diacritic marks: Á Č Ď É Ě Í Ň Ó Ř Š Ť Ú Ů Ý Ž
á č ď é ě í ň ó ř š ť ú ů ý ž


public String replaceDiacritic (String inputStr) {
	
	Map<String, String> replacements = new LinkedHashMap<String,String>() {{
		//Velká
		put("Á","A");
		put("Č","C");
		put("Ď","D");
		put("É","E");
		put("Ě","E");
		put("Í","I");
		put("Ň","N");
		put("Ó","O");
		put("Ř","R");
		put("Š","S");
		put("Ť","T");
		put("Ú","U");
		put("Ů","U");
		put("Ý","Y");
		put("Ž","Z");
		//Malá  "," ");
		put("á","a");
		put("č","c");
		put("ď","d");
		put("é","e");
		put("ě","e");
		put("í","i");
		put("ň","n");
		put("ó","o");
		put("ř","r");
		put("š","s");
		put("ť","t");
		put("ú","u");
		put("ů","u");
		put("ý","y");
		put("ž","z");
		}
	};
	for(Map.Entry<String, String> entry : replacements.entrySet()) {
          inputStr =  inputStr.replaceAll(entry.getKey(), entry.getValue());
         }	
	return inputStr;
}
	


Editace: 2015-10-23 20:37:35
Počet článků v kategorii: 397
Url:eclipse-adt-plugin-not-recent-graphical-layout-editor
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