Save Restore Array List Android Example

How add item to ArrayList, sort ArrayList, search find index of item in ArrayList, min(), max() Java basic example.

import java.util.ArrayList;
import java.util.Collections;

public class MainClass {
	public static void main(String[] arg) {
		String[] arrayOfString = {"nothing", "Hello", "people"
				, "bye-bye", "hello", "world!", "End" };
		   ArrayList<String> arrayList = new ArrayList<String>();
            for(String s: arrayOfString)
		     arrayList.add(s);

		    Collections.sort(arrayList);
		    // foreach
		    for (String str: arrayList)
		      System.out.println(str);
		    
		    Object objMin = Collections.min(arrayList);
		    System.out.println("Min is: " + objMin);
		    
		    Object objMax = Collections.max(arrayList);
		    System.out.println("Max is: " + objMax);
		    
		    int index = Collections.binarySearch(arrayList, "people");
		    System.out.println("Index of people is: " + index);
		    
		  }

		
	
}
/*
End
Hello
bye-bye
hello
nothing
people
world!
Min is: End
Max is: world!
Index of people is: 5
*/

Map TreeMap add key value pair get find pair by key Java Android example.

MainClass.java

import java.util.Map;
import java.util.TreeMap;

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

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

       // check if key exists 	    
	   if( map.containsKey("two")){
		System.out.print("two = " + map.get("two"));
	   }
	}
}
/*
two = zwei
 */

Call requires permission which may be rejected by user: code should explicitly check to see if permission is available (with `checkPermission`) or explicitly handle a potential `SecurityException`

try {
// your code for example: 
//  LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);         
//  Criteria criteria = new Criteria();
//        provider = locationManager.getBestProvider(criteria, false);
//  locationManager.requestLocationUpdates(provider, 400, 1, this);
        } catch (SecurityException e) {
            e.printStackTrace();
        }

Issue:
ActivityThread: Failed to find provider

Try check this authority tags if they are all the same:
(com.yourdomen.yourproject.YourContentProviderClass replace your path to YourContentProviderClass)

res/xml/serchable.xml
Tag searchable

<searchable xmlns:android="//schemas.android.com/apk/res/android"
android:blahblah 
......
android:searchSuggestAuthority="com.yourdomen.yourproject.YourContentProviderClass"

AndroidManifest.xml
Tag provider

 <provider android:name=".YourContentProviderClass"
                  android:authorities="com.yourdomen.yourproject.YourContentProviderClass" />

Code look up at the Api Demos

android_fragments arguments attributes - three fragments on screen


android_fragments_alert_dialog


android_fragments_context_menu


android_fragments_custom_animation


android_fragments_dialog


android_fragments_dialog_or_activity


fragment_hide_show


fragment_layout


fragments_list_array


fragment_menu


android_fragments_get_result_from_fragment and tabs in two rows


android_fragments_recive_result


android_fragments_stack


fragment_tabs