Every fragment must have an empty constructor Android Java Class
You have to add constructor!
public static class YourFragment extends Fragment {
//you have to add constructor!!!!!
public YourFragment(){}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.activity_main, container, false);
return view;
}
}
396LW NO topic_id
AD
Další témata ....(Topics)
onSaveInstanceState, onRestoreInstanceState life cycle if screen orientation changed from log file.
Diagram of life cycle onSaveInstanceState, onRestoreInstanceState
[caption id="attachment_1169" align="alignleft" width="229" caption="Life cycle onRestoreInstanceState"]
[/caption]
// 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"]

String s = "Some text for appending
";
TextView mTitle = (TextView) findViewById(R.id.title_text);
mTitle.setText(R.string.app_name); // insert text from strings.xml
mTitle.append(s); // append string like a variable value
mTitle.append("My string will appended
"); // append string
You can insert this source code into onCreate in your activity file
If you often copy your Android project to another you have to using function for obtaining varied information about package.
This code show how get package name in Android application as string:
This code show how get package name in Android application as string:
Context context = getContext(); // this.getContext(); getApplicationContext(); etc.
String sPackName = context.getPackageName();
Brand | Samsung |
Model (codename) | Galaxy Y (S5360) |
Cena, včetně DPH | 2400 / 06.2012 |
Display size (v palcích) | 3 |
Display-resolution | 240x320 |
Dotek-typ | kapacitní |
CPU typ | BCM21553 |
CPU MHz | 832 |
CPU core | |
L2 cache | ? |
RAM | 256 |
ROM | 512 |
GPU | VideoCore IV |
NenaMark2 Benchmark | 12 |
GPU-GLBenchmark | |
Baterie mAh | 1200 |
Foto MPx | 2 |
Autofocus | ne |
Video | |
Official Android ICS | Android OS v 2.3 |
CyanogenMod support | |
Dotek-prstů-max | |
Display-ppi | 133 |
Display-retina | 41% |
Network | čîtyřpásmový GSM 850/900/1800/1900 MHz , HSDPA 2100 MHz |
Connectivity | Bluetooth v2.0 plus EDR plus support A2DP, USB host |
Pozn. | CPU ARMv6, GPU 20MT/s OpenGL ES 2.0 |

Editace: 2014-09-10 10:40:35
Počet článků v kategorii: 396
Url:every-fragment-must-have-an-empty-constructor-android-java-class