Screen size density independent pixel resolution

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Terms Screen size, density, density independent pixel, resolution as a picture - pictogram.
mobile-phone-screen-resolution-terms

Test your knowledge
Q: How to find out the phone screen size?
A: (By length of display diagonale in inch - Not to measure a diagonal of device!!!)

Q: What resolution has 720 x 1280 display?
A: (921600 pixels)

Q: What does it mean "240 dpi" screen density?
A: (Display have density 240 x 240 dots - "Tri-color LED etc." - per every physical (real) square inch. If you have icon 240x240 pixels, this will just occupy an area of one square inch on the display.)

Q: Phone have screen density 240 dpi. Image for 160 dpi screen density have size 128x 128 pixels. What will be the size of the image for 240 dpi screen density?
A: (Calculate the virtual pixels size. 128 * (240/160) = 192. You have to resize image to new size 192 x 192 physical pixels and put into folder drawable-hdpi (high) ~240dpi for phone with screen density 240 dpi. ) or use density independend pixels 128dp x 128dp.

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Další témata ....(Topics)

260

SeekBar listener Android Example Source | seekbar-listener-android-example-source

SeekBar setOnSeekBarChangeListener Example. Change TextView font size by SeekBar Example.


        TextView mTextView01 = (TextView)findViewById(R.id.textView01);

        SeekBar  mSeekBarTexSize = (SeekBar)findViewById(R.id.seekBarTextSize);
        mSeekBarTexSize.setMax(100);
        mSeekBarTexSize.setProgress(25);

        mSeekBarTexSize.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            public void onProgressChanged(SeekBar seekBar, int progress,
                    boolean fromUser) {
            	mTextView01.setTextSize((float)progress);
            }

            public void onStartTrackingTouch(SeekBar seekBar) {}
            public void onStopTrackingTouch(SeekBar seekBar) {}
        });

237

The application may be doing too much work on its main thread | the-application-may-be-doing-too-much-work-on-its-main-thread

Warning: The application may be doing too much work on its main thread
Try this sorce code:


import android.os.StrictMode;

public class MyActivity extends Activity {
	static{
		StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
		StrictMode.setThreadPolicy(policy);
	}
	@Override
    public void onCreate(Bundle savedInstanceState) {
//.................. etc.

181

Motorola Droid X | motorola-droid-x

Motorola Droid X cena od 3 000 KCZ Kč (únor.2012)
Spokojenost uživatelů nadprůměrná.
Motorola Droid X je chytrý telefon s operačním systémem Android.
Motorola Droid X je (22.února2012) 8. nejpoužívanějším chytrým telefonem u programu Sky Map viz tabulka.

Android 2.1
Display 854 x 480 pixelů
8 megapixel fotoaparát dual LED flash
720p HD video recording
Music and Video player
8 GB paměť
rozšíření paměti 32 GB
WiFi/DLNA
TI OMAP3630 processor – 1GHz
4.3-inch large display

Motorola Droid X photo pic image

Zdroj obrázku: wikipedia

202

Samsung Galaxy Mini (S5570) | samsung-galaxy-mini-s5570

Brand	Samsung
Model (codename)	Galaxy Mini (S5570)
Price (cena, včetně DPH)	3500 / 06.2012
Display size in Inch (v palcích)	3.14
Display-resolution	240x320
Dotek-typ	kapacitní
CPU typ	MSM7227
CPU MHz	600
CPU core
L2 cache	yes
RAM	256
ROM	512
GPU	Adreno 200
NenaMark2 Benchmark
GPU-GLBenchmark
Baterie mAh	1200
Foto MPx	3
Autofocus	no
Video	QVGA (320 x 240) při 15 frames/s
Official Android ICS	Android Froyo 2.2
CyanogenMod support	yes
Dotek-prstů-max	Dual-touch (two fingers)
Display-ppi	127
Display-retina	39%
Networks	GSM&EDGE (850 / 900 / 1.800 / 1.900 MHz) 3G (900 / 2.100 MHz)
Connectivity	Bluetooth V2.1 , USB V2.0 , USB mass storage , SyncML(DM) , WIFI , AGPS, 3.5 mm jack
Note

Samsung S5570 Galaxy Mini - image
samsung-s5570-galaxy-mini

396

ADB restart device every time Android Studio | adb-restart-device-every-time

Android Studio ADB restart mobile device from USB every time if RUN of DEBUG button pressed

Try to close the mobile application on your device completely before starting again from Android Studio.
Close every fragment.
The problem occurs when the application has multiple fragments.

Date: 13.07.2020 - 08:23

Editace: 2015-11-29 12:26:12
Počet článků v kategorii: 397
Url:screen-size-density-independent-pixel-resolution

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