Get SensorManager PowerManager WindowManager Display Android example


    private SensorManager mSensorManager;
    private PowerManager mPowerManager;
    private WindowManager mWindowManager;
    private Display mDisplay;

// onCreate
   @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

       // Get an instance of the SensorManager
        mSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);

        // Get an instance of the PowerManager
        mPowerManager = (PowerManager) getSystemService(POWER_SERVICE);

        // Get an instance of the WindowManager
        mWindowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
        mDisplay = mWindowManager.getDefaultDisplay();

        setContentView(R.layout.main); // main.xml or your xml file name

}

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Další témata ....(Topics)

259

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) {}
        });

249

Drawable Bitmap get width height Android | drawable-bitmap-get-width-height-android


		Drawable dr = getResources().getDrawable(R.drawable.algebra);
		int h = dr.getIntrinsicHeight();
		int w = dr.getIntrinsicWidth();

		Bitmap ball = BitmapFactory.decodeResource(getResources(), R.drawable.algebra);
		int _nWidth = ball.getWidth();
		int _nHeight = ball.getHeight();

177

Samsung Galaxy Ace | samsung-galaxy-ace

Samsung Galaxy Ace nejlepší cena od 4 500 KCZ Kč (únor.2012)
Samsung Galaxy Ace je chytrý telefon s operačním systémem Android.
Samsung Galaxy Ace je (22.února2012) 4. nejpoužívanějším chytrým telefonem u programu Sky Map viz tabulka.

Galaxy Ace je 3.5G smartphone nabízí i quad-band GSM. Displej je 3,5 palcový TFT kapacitní dotykový LCD HVGA s (320x480) rozlišením. K dispozici je také 5 megapixelový fotoaparát s LED bleskem. Je schopny zaznamenat video v rozlišení QVGA (320x240) a VGA s (640x480) rozlišením. Ace je dodáván s 1350mAh Li-Ion baterií. Ace běží s OS Android 2.2 Froyo a lze jej upgradovat na Android 2.3.6 Gingerbread.

Samsung Galaxy Ace photo pic image

Zdroj obrázku: wikipedia

Spinner ComboBox DropDown set on selected item listener setOnItemSelectedListener Java Android example | spinner-combobox-set-on-selected-item-listener-setonitemselectedlistener-java-android-example

Spinner, ArrayAdapter, setOnItemSelectedListener, onItemSelected, setDropDownViewResource

MainClass.java


public class Vypocet extends Activity {
 Spinner   hSpinnerMetry;
// .......
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

	       hSpinnerMetry = (Spinner) findViewById(R.id.idSpinnerMetry);
	        ArrayAdapter<CharSequence> adapterMetry = ArrayAdapter.createFromResource(
	        		this, R.array.metry_array, android.R.layout.simple_spinner_item);
	        adapterMetry.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
	        hSpinnerMetry.setAdapter(adapterMetry);
			
	           hSpinnerMetry.setOnItemSelectedListener(
	                    new OnItemSelectedListener() {
	                        public void onItemSelected(
	                                AdapterView<?> parent, View view, int position, long id) {
	                        int nPos = position;
	                        }

	                        public void onNothingSelected(AdapterView<?> parent) {
	                        
	                        }
	                    });	        

      }
}

strings.xml



<string-array name="metry_array">
<item>m</item>
<item>dm</item>
<item>cm</item>
<item>mm</item>
</string-array>

How going life cycle if screen orientation changed Android example | how-going-life-cycle-if-screen-orientation-changed-android-example

onSaveInstanceState, onRestoreInstanceState life cycle if screen orientation changed from log file.


// 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"]

android/life_cycle_onRestoreInstanceState-229x300.png

[/caption]

Editace: 2011-11-07 11:43:11
Počet článků v kategorii: 396
Url:get-sensormanager-powermanager-windowmanager-display-android-example