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How going life cycle if screen orientation changed Android example


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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"]life_cycle_onRestoreInstanceState[/caption]

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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


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Motorola Droid RAZR | motorola-droid-razr


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Spokojenost uživatelů nadprůměrná.
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Motorola Droid RAZR photo pic image
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Import project Android Eclipse | import-project-android-eclipse


Import a new Android project for example downloaded from internet via Eclipse into project folder.

  1. Right click into projects explorer in Eclipse and select Import

  2. Android

  3. Existing Android Code Into Workspace

  4. Root Directory (select folder of downloaded project)

  5. Check your downloaded project

  6. Check Copy project into Workspace

  7. Finish (press)




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SAMSUNG i9220 Galaxy Note | samsung-i9220-galaxy-note


Displej 1280 x 800, 5.3 "
Rozměry 146.85 mm x 83 mm x 9.7 mm
Rozlišení fotoaparátu 8 Mpix
HD video, natačení videosekvencí
Operační system Android
Hlasové ovládání
Přehrávání MP3
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onSensorChanged Android example | onsensorchanged-android-example


Sensor, getSystemService(), getSensorList(), getDefaultDisplay(), WindowManager,
Surface.ROTATION_0, onAccuracyChanged() Android sample.

public class _MotionActivity extends Activity implements SensorEventListener {
    private float mSensorX;
    private float mSensorY;
    private Display mDisplay;
    private SensorManager sm;
    private PowerManager mPowerManager;
    private WindowManager mWindowManager;
   
    TextView textview;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // Get an instance of the SensorManager
        sm = (SensorManager) getSystemService(SENSOR_SERVICE);
        if(sm.getSensorList(Sensor.TYPE_ACCELEROMETER).size()!=0){
        	Sensor s = sm.getSensorList(Sensor.TYPE_ACCELEROMETER).get(0);
        	sm.registerListener(this,s, SensorManager.SENSOR_DELAY_NORMAL);
        }

        // 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);
        textview = (TextView)findViewById(R.id.textView1);
    }
    
    @Override
    public void onSensorChanged(SensorEvent event) {

    	
        if (event.sensor.getType() != Sensor.TYPE_ACCELEROMETER)
            return;

        switch (mDisplay.getRotation()) {
            case Surface.ROTATION_0:
                mSensorX = event.values[0];
                mSensorY = event.values[1];
                textview.setText(String.valueOf( mSensorX));
                break;
            case Surface.ROTATION_90:
                mSensorX = -event.values[1];
                mSensorY = event.values[0];
                textview.setText(String.valueOf( mSensorX));
                break;
            case Surface.ROTATION_180:
                mSensorX = -event.values[0];
                mSensorY = -event.values[1];
                textview.setText(String.valueOf( mSensorX));
                break;
            case Surface.ROTATION_270:
                mSensorX = event.values[1];
                mSensorY = -event.values[0];
                textview.setText(String.valueOf( mSensorX));
                break;
        }

    }

	@Override
	public void onAccuracyChanged(Sensor sensor, int accuracy) {
		// TODO Auto-generated method stub
		
	}
	@Override
	protected void onResume() {
		super.onResume();

             if(sm.getSensorList(Sensor.TYPE_ACCELEROMETER).size()!=0){
        	Sensor s = sm.getSensorList(Sensor.TYPE_ACCELEROMETER).get(0);
        	sm.registerListener(this,s, SensorManager.SENSOR_DELAY_NORMAL);
             }
	}

	@Override
	protected void onPause() {
		
		sm.unregisterListener(this);
		super.onStop();
	}       
    
}



Editace: 2011-10-08 19:24:22
Počet článků v kategorii: 397
Url:how-going-life-cycle-if-screen-orientation-changed-android-example

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