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View getId is null Android


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If you create a button or view programmatically with OnClickListener you can set a tag key before button in parent layout is added.
And get correct button by this tag getTag() instead getId() in OnClickListener etc.

Button button = new Button(getApplicationContext());
int idOfButton = button.getId(); // return -1

button.setTag("my_button");
String sTag = (String) button.getTag(); // return "my_button"


397LW NO topic_id




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Další témata ....(Topics)


180

HTC Incredible 2 | htc-incredible-2


HTC Incredible 2 cena od 6 000 KCZ Kč (únor.2012)
Spokojenost uživatelů nadprůměrná.
HTC Incredible 2 je chytrý telefon s operačním systémem Android.
HTC Incredible 2 je (22.února2012) 7. nejpoužívanějším chytrým telefonem u programu Sky Map viz tabulka.

HTC Incredible 2 - video recense

64

Leap year date time Java Android example | leap-year-date-time-java-android-example


GregorianCalendar cal = new GregorianCalendar(); Boolean b = cal.isLeapYear(2012); // true, Android example.



public class MainActivity extends Activity {
TextView txtV;
	Context cntx;
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        txtV = (TextView)findViewById(R.id.idLabel);
        cntx = this;
        StringBuilder strBuild = new StringBuilder();
        
         GregorianCalendar cal = new GregorianCalendar();
         Boolean b = cal.isLeapYear(2012); // true
         strBuild.append("Is leap year 2012? " + b + "

"); b = cal.isLeapYear(2014); // false strBuild.append("Is leap year 2014? " + b + "
"); txtV.setText(strBuild); } }
25

Copy sqlite database from apk package to device folder Android example | copy-sqlite-database-from-apk-to-device-folder-android-example


Put your sglite database to Android Eclipse project folder named Assets.
On device will copy database file to application folder as this example:



 public void createDatabase(Context myContext) throws IOException {
    String sPackName = myContext.getPackageName();
    InputStream assetsDB = myContext.getAssets().open("myDatabase");
    OutputStream dbOut = new FileOutputStream("/data/data/"+sPackName+"/database");
 
    byte[] buffer = new byte[1024];
    int length;
    while ((length = assetsDB.read(buffer))>0){
      dbOut.write(buffer, 0, length);
    }
 
    dbOut.flush();
    dbOut.close();
    assetsDB.close();
}


83

Hashtable key value pair add put get pair Java Android example | hashtable-key-value-pair-add-put-get-pair-java-android-example


How add pair of strings to Hashtable, how get pair key value from Hashtable, how split string, basic Java Android example.

MainClass.java

import java.util.Enumeration;
import java.util.Hashtable;
public class MainClass {
	public static void main(String[] arg) {
		
		// english;germany dictionary
		String[] arrayOfString = { "one;eine", "two;zwei", "three;drei" };

	    Hashtable<String, String> hashTable = new Hashtable<String, String>();
	    for(String s: arrayOfString){
	    	String[] array = s.split(";");
	    	String sKey ="", sValue="";
	    	if(array.length > 1){
	    	sKey = array[0]; sValue = array[1];
	    		hashTable.put(sKey, sValue);
	    	}
	    }

	    Enumeration<String> enumer = hashTable.keys();
	    while (enumer.hasMoreElements()) {
	      String keyFromTable = (String) enumer.nextElement();
	      // get Returns the value to which the specified key is mapped, 
	      // or null if this map contains no mapping for the key
	      System.out.println(keyFromTable + " = " + hashTable.get(keyFromTable));
	    }       

	    
	}
}
/*
two = zwei
one = eine
three = drei
 */
199

HTC One S | htc-one-s-nejlepsi-smartphone


Nejlepší Smartphone jaro 2012.
n
Brand HTC
Model (codename) One S
Price - (Cena, včetně DPH) 13000
Display size in Inch (v palcích) 4.3
Display-resolution (rozlišení) 960x540
Dotek-typ multi-touch capacitive
CPU typ MSM8260A
CPU MHz 1500
CPU core 2
L2 cache
ROM 16 GB
RAM 1 GB
GPU Adreno 225
NenaMark2 Benchmark
GPU-GLBenchmark
Battery mAh 1650 mAh, 10.5 hours of talk time and 13.2 days of stand-by time
Foto MPx 8
Autofocus AF
Video HD záznam videa, 1920×1080 (1080p HD) @ 30 frame/s - 3GP, .3G2, MP4, WMV, AVI
Official Android ICS Android 4.0 Ice Cream Sandwich, HTC Sense 4.0 overlay
CyanogenMod support
Dotek-prstů-max
Display-ppi
Display-retina
Network HSPA/WCDMA: • Europe/Asia: 850/900/2100 MHz GSM/GPRS/EDGE: • 850/900/1800/1900 MHz
Connectivity 3.5 mm stereo audio jack Bluetooth with aptX™ enabled (Bluetooth® 4.0) Wi-Fi®: IEEE 802.11b/g/n DLNA® for wirelessly streaming media from the phone to a compatible TV or computer micro-USB 2.0 (5-pin) port with mobile high-definition video link (MHL) for USB or HDMI connection (Special cable required for HDMI connection.)
Pozn.


Pdf file


htc one s smartphone

Video - záznam a kvalita videa HTC One S
**


Editace: 2016-03-25 18:39:13
Počet článků v kategorii: 397
Url:view-getid-is-null-android

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