RadioButton RadioGroup Java Android example

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RadioButton RadioGroup Android example source code for Android developer
Example for *.xml files


       <RadioGroup android:id="@+id/idRadio_group"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="20dp"
            android:orientation="vertical">

            <RadioButton android:id="@+id/idRadio_1"
                android:text="@string/textLabel_1"/>
            <RadioButton android:id="@+id/idRadio_2"
                android:text="@string/textLabel_2"/>
            <RadioButton android:id="@+id/idRadio_3"
                android:text="@string/textLabel_3"/>

        </RadioGroup>

Example for *.java files


// import
import android.widget.RadioGroup;
// get handle of RadioGroup
RadioGroup  mRadioGroup = (RadioGroup) findViewById(R.id.idRadio_group);

// which RadioButton is selected for example in some function body
         int nUnits = 10; // decimetry
    	 int nIdRadio = mRadioGroup.getCheckedRadioButtonId();
    			if(nIdRadio == R.id.idRadio_1) nUnits = 1; // metr
    			else if(nIdRadio == R.id.idRadio_2) nUnits = 10; // decimetr
    			else if(nIdRadio == R.id.idRadio_3) nUnits = 100; // cm
    			else if(nIdRadio == R.id.idRadio_4) nUnits = 1000; // mm


// listener for RadioGroup Java Android example
       mRadioGroup.setOnCheckedChangeListener(
                new RadioGroup.OnCheckedChangeListener() {
                    public void onCheckedChanged(RadioGroup group,
                            int checkedId) {
                        Log.v("Selected", "New radio item selected: " + checkedId);
                        recordNewUIState();
                    }
                });

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Android app setup preferences, settings, open, read, write, onStop(), onPause(), getSharedPreferences(), SharedPreferences.Editor getInt(), getBoolean(), getString() , putInt(), putString(), putBoolean() example source code.



import android.content.SharedPreferences;

public class MainClass extends Activity {
  public static final String PREFERENCES_NAME = "MyPrefsFile";
  String myNewString;
  int myNewInt;
  Boolean myNewBool;


   @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
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      SharedPreferences settings = getSharedPreferences(PREFERENCES_NAME, 0);
			
     String sDefault = "Hello!";
      String sStringFromPrefFile = settings.getString("myString", sDefault); // new text  or default Hello!
          
      int nDefaultIndex = 2; //
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      Boolean bDefault = false;
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    @Override
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    @Override
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    }
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    	try {
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    		SharedPreferences.Editor editor = settings.edit();
 
    		editor.putString("myString", myNewString);
     		editor.putInt("nMyInt", myNewInt);
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Set Default Start Up Activity Class Java AndroidManifest xml | set-default-start-up-activity-class-java-androidmanifest-xml

Insert into your default start up activity tag inten-filter tag with action MAIN and category LAUNCHER


            <intent-filter>
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AndroidManifest.xml


<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="//schemas.android.com/apk/res/android"
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                <category android:name="android.intent.category.LAUNCHER" />
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</manifest>

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Try set bigger line-height of links and font size for example:


/*in css*/
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line-height: 48px;
font-size: 20px;
background-color: rgb(255,204,0);
}

/* in html page set class of link*/
<a class="links" href="m.mydomen.com/mypage.html">Blah blah mypage</a>

// or in css for all links on page
a {
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// in AndroidManifest.xml
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// in MyActivity.java
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int nOrientation =	getResources().getConfiguration().orientation;
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	if(nOrientation != Configuration.ORIENTATION_LANDSCAPE)
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}
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}

How to make a quick start the android emulator | how-to-make-a-quick-start-the-android-emulator

Very very quick start of Android Emulator from Eclipse.

Go to Eclipse s menu Window -> Android SDK and AVD Manager

Select Virtual devices

Select check box Snapshot: Enabled

Press Edit AVD button.

If will closed Android Emulator all data will saved on disk.
If will reopen Android Emulator, configuration and data will read from disk.

[caption id="attachment_768" align="alignleft" width="300" caption="android-emulator-enable-quick-start"]

[/caption]

Editace: 2011-09-26 20:48:27
Počet článků v kategorii: 397
Url:radiobutton-radiogroup-android-example

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