array list city android

private String[] arrListCity;
arrListCity = getResources().getStringArray(R.array.list_city_new);
public void prepareArrayLits()
    {
        itemList = new ArrayList<Object>();
        for(int i=0; i< arrListCity.length; i++)
          {
            Log.w(">>>>>>>>>>> test array", arrListCity[i]);
            AddObjectToList(R.drawable.arrow, arrListCity[i], "Kim Tuyến run rẩy khi chụp ảnh với nhện - VN's Next Top Model");
          }
       
    }

Shared Preferences button back splash with android exam

//Splash
public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.loading);
        app_preferences = PreferenceManager.getDefaultSharedPreferences(this);
        check = app_preferences.getInt("check", 1);
    }
//
protected void onResume() {
        // TODO Auto-generated method stub
        if(check==1){
            newTimerCounter(3);
        }else {
            finish();
        }
        super.onResume();
    }
//Activity Main
public boolean onKeyDown(int keyCode, KeyEvent event) {
        // TODO Auto-generated method stub
         if ((keyCode == KeyEvent.KEYCODE_BACK)) {
             SplashActivity.check = 0;
             Log.d(this.getClass().getName(), "back button pressed");
            }
            return super.onKeyDown(keyCode, event);

    }

send Bundle value intent with android exam

//Activity 1
public void onClick(View arg0) {
                long value;
                if (tinhthanh == 0) {
                    value = 1;
                }
                else {
                  value = 0;
                }
                Bundle sendBundle = new Bundle();
                sendBundle.putLong("value", value);
                Intent i = new Intent(VNTaxiCallActivity.this, ListTaxi.class);
                i.putExtras(sendBundle);
                startActivity(i);
                overridePendingTransition( R.anim.slide_in_left, R.anim.slide_out_left );
            }
//Activity 2
Bundle receiveBundle = this.getIntent().getExtras();
            final long int_tinhthanh = receiveBundle.getLong("value");
            lblHeader =  (TextView) findViewById(R.id.lblHeaderCity);
            if(int_tinhthanh==1){
                Taxi_HaNoi();
            } else if (int_tinhthanh==2) {
                Taxi_DaNang();
            } else if (int_tinhthanh==3) {
                Taxi_HCM();
            }else {
                Taxi_CanTho();
            }

sort abc listview adapter android exam

java.util.Arrays.sort(arrListCity, java.text.Collator.getInstance(new Locale("vi")));

exit app android exam

 private void quitApplication() {
  try {
   ActivityManager manager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
   List<ActivityManager.RunningAppProcessInfo> process = manager
     .getRunningAppProcesses();
   int pid = 0;
   for (RunningAppProcessInfo runningAppProcessInfo : process) {
    if (runningAppProcessInfo.processName
      .equals(this.getPackageName())) {
     pid = runningAppProcessInfo.pid;
     break;
    }
   }
   android.os.Process.killProcess(pid);
  } catch (Exception e) {
   Log.e(TAG, TAG + e);
  }
 }

ListViewAdapter android exam

/*public void initComponent()
    {
        lblHeader = (TextView)findViewById(R.id.lblHeaderCity);
        lvCity = (ListView)findViewById(R.id.lvCity);
        arrListCity = getResources().getStringArray(R.array.list_city_central);
       
        lblHeader.setText(R.string.central);
        ListViewAdapter adapter = new ListViewAdapter(this, arrListCity);
        lvCity.setAdapter(adapter);
    }*/

Android: Quickly building a menu for an application

After creating an Android Project in Eclipse called “AndroidMenus” I then set about creating a new XML file in a folder (you need to create this folder) called “menu” under the “res” (parent) folder. I named the xml file “mymenu.xml” and added this:

<?xml version="1.0" encoding="utf-8"?> <menu xmlns:android="http://schemas.android.com/apk/res/android">     <item android:id="@+id/menuItem1"           android:icon="@drawable/menu_item1"           android:title="@string/menu_item1" />     <item android:id="@+id/menuItem2"           android:icon="@drawable/menu_item2"           android:title="@string/menu_item2" /> </menu>

As you can see we need to make sure we have some icons for the menu as well as some menu item strings in the strings.xml file which is located in the “res/values” folder. Here is my modified strings.xml file:

<?xml version="1.0" encoding="utf-8"?> <resources>     <string name="hello">Hello World, AndroidMenus!</string>     <string name="app_name">Android Menus</string>     <string name="menu_item1">Item 1</string>     <string name="menu_item2">Item 2</string> </resources>

The “main.xml” file can be left just as the project wizard created it however you need to modify the “AndroidMenus.java” file to override the onCreateOptionsMenu method.

package com.giantflyingsaucer; import android.app.Activity; import android.os.Bundle; import android.view.Menu; import android.view.MenuInflater; public class AndroidMenus extends Activity {     /** Called when the activity is first created. */     @Override     public void onCreate(Bundle savedInstanceState)     {         super.onCreate(savedInstanceState);         setContentView(R.layout.main);     }     @Override     public boolean onCreateOptionsMenu(Menu menu)     {         MenuInflater menuInflater = getMenuInflater();         menuInflater.inflate(R.menu.mymenu, menu);         return true;     } }

You also need to create some icons and place them into the appropriate folders as seen below:

Once you’ve got this done you can run the project. In the emulator press the “Menu” button to trigger the menu.
Results:

Yes its pretty ugly but like I said I’m not a graphics person. If you click on the menu items nothing happens, lets change this now by adding some Java code to the “AndroidMenus.java” file. For this we need to override the onOptionsItemSelected method.

package com.giantflyingsaucer; import android.app.Activity; import android.os.Bundle; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.widget.Toast; public class AndroidMenus extends Activity {     /** Called when the activity is first created. */     @Override     public void onCreate(Bundle savedInstanceState)     {         super.onCreate(savedInstanceState);         setContentView(R.layout.main);     }     @Override     public boolean onCreateOptionsMenu(Menu menu)     {         MenuInflater menuInflater = getMenuInflater();         menuInflater.inflate(R.menu.mymenu, menu);         return true;     }     @Override     public boolean onOptionsItemSelected(MenuItem item)     {         // Handle item selection         switch (item.getItemId())         {         case R.id.menuItem1:             Toast.makeText(AndroidMenus.this, "Menu Item 1 was pressed", 3000).show();             return true;         case R.id.menuItem2:             Toast.makeText(AndroidMenus.this, "Menu Item 2 was pressed", 3000).show();             return true;         default:             return super.onOptionsItemSelected(item);         }     } }

You can see with the code depending what choice is made is reflected with a quick toast notification.
Results:










Full download

Using SQLite with Android to power an AutoComplete textbox

Like my previous Android article make sure you have the Android SDK and Eclipse tools for Android all setup and configured.
I created a new Android Project in Eclipse and called it “UsingSQLite”. I used Android 1.6 as my target but you can use a newer version of Android if you wish.
The first thing to do is create a new file called “list_item.xml” inside of the “layout” folder.

Add the following XML to it:

<?xml version="1.0" encoding="utf-8"?> <TextView xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:padding="10dp"     android:textSize="16sp"     android:textColor="#000"> </TextView>

That file contains the TextView that will be used to hold the autocomplete data.
Now go into the “main.xml” file and modify it like so:

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:orientation="horizontal"     android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:padding="5dp">     <TextView         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="@string/COUNTRY_LABEL" />     <AutoCompleteTextView android:id="@+id/autocompleteCountry"         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:layout_marginLeft="5dp"/> </LinearLayout>

That gives you a label (well a textview really) that says “Country” and the autocomplete textview. You might also notice I’m pulling some data from the string resources so you need to update the “strings.xml” (located in the “values” folder) to this:

<?xml version="1.0" encoding="utf-8"?> <resources>     <string name="hello">Hello World, UsingSQLite!</string>     <string name="app_name">Using SQLite</string>     <string name="COUNTRY_LABEL">Country</string> </resources>

That it for the XML we need to add and edit. We can move onto the class that will do most of the heavy lifting as far as using the SQLite database. Keep in mind I’ve tailored this class to be specific to simply loading and storing the “Countries” data. You can broaden out the code when your comfortable with it and improve on it and make it more generic if you wish. For now all I want is the ability to put in some country names and get them back to populate the autocomplete textview.
Here is the code for “SQLiteCountryAssistant.java”:

package com.giantflyingsaucer;   import android.database.*; import android.database.sqlite.*; import android.content.ContentValues; import android.content.Context; import android.util.Log;   public class SQLiteCountryAssistant extends SQLiteOpenHelper {     private static final String DB_NAME = "usingsqlite.db";     private static final int DB_VERSION_NUMBER = 1;     private static final String DB_TABLE_NAME = "countries";     private static final String DB_COLUMN_1_NAME = "country_name";       private static final String DB_CREATE_SCRIPT = "create table " + DB_TABLE_NAME +                             " (_id integer primary key autoincrement, country_name text not null);)";       private SQLiteDatabase sqliteDBInstance = null;       public SQLiteCountryAssistant(Context context)     {         super(context, DB_NAME, null, DB_VERSION_NUMBER);     }       @Override     public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)     {         // TODO: Implement onUpgrade     }       @Override     public void onCreate(SQLiteDatabase sqliteDBInstance)     {         Log.i("onCreate", "Creating the database...");         sqliteDBInstance.execSQL(DB_CREATE_SCRIPT);     }       public void openDB() throws SQLException     {         Log.i("openDB", "Checking sqliteDBInstance...");         if(this.sqliteDBInstance == null)         {             Log.i("openDB", "Creating sqliteDBInstance...");             this.sqliteDBInstance = this.getWritableDatabase();         }     }       public void closeDB()     {         if(this.sqliteDBInstance != null)         {             if(this.sqliteDBInstance.isOpen())                 this.sqliteDBInstance.close();         }     }       public long insertCountry(String countryName)     {         ContentValues contentValues = new ContentValues();         contentValues.put(DB_COLUMN_1_NAME, countryName);         Log.i(this.toString() + " - insertCountry", "Inserting: " + countryName);         return this.sqliteDBInstance.insert(DB_TABLE_NAME, null, contentValues);     }       public boolean removeCountry(String countryName)     {         int result = this.sqliteDBInstance.delete(DB_TABLE_NAME, "country_name='" + countryName + "'", null);           if(result > 0)             return true;         else             return false;     }       public long updateCountry(String oldCountryName, String newCountryName)     {         ContentValues contentValues = new ContentValues();         contentValues.put(DB_COLUMN_1_NAME, newCountryName);         return this.sqliteDBInstance.update(DB_TABLE_NAME, contentValues, "country_name='" + oldCountryName + "'", null);     }       public String[] getAllCountries()     {         Cursor cursor = this.sqliteDBInstance.query(DB_TABLE_NAME, new String[] {DB_COLUMN_1_NAME}, null, null, null, null, null);           if(cursor.getCount() >0)         {             String[] str = new String[cursor.getCount()];             int i = 0;               while (cursor.moveToNext())             {                  str[i] = cursor.getString(cursor.getColumnIndex(DB_COLUMN_1_NAME));                  i++;              }             return str;         }         else         {             return new String[] {};         }     } }

The SQLite database table is very simple. An auto-incrementing id field and a text field to hold the country name. Because I extend SQLiteOpenHelper I also needed to implement the onCreate and onUpgrade methods. The “onCreate” function simply creates the database if it doesn’t exist.

Log.i("onCreate", "Creating the database..."); sqliteDBInstance.execSQL(DB_CREATE_SCRIPT);

Note: The logging will show up in the “DDMS” perspective in Eclipse under the “LogCat” tab.
Then there are the standard methods to accomplish DB work such as “insertCountry”, “removeCountry”, “updateCountry”, and finally “getAllCountries”. Most of this should be pretty straight forward and I’ve tried to make it as easy to understand as possible even being more verbose than required for the sake of clarity.
Finally going back to the main activity class “UsingSQLite.java”:

package com.giantflyingsaucer;   import android.app.Activity; import android.os.Bundle; import android.util.Log; import android.widget.ArrayAdapter; import android.widget.AutoCompleteTextView;   public class UsingSQLite extends Activity {     private SQLiteCountryAssistant sqlliteCountryAssistant;       @Override     public void onCreate(Bundle savedInstanceState)     {         super.onCreate(savedInstanceState);         setContentView(R.layout.main);           final AutoCompleteTextView textView = (AutoCompleteTextView) findViewById(R.id.autocompleteCountry);           sqlliteCountryAssistant = new SQLiteCountryAssistant(UsingSQLite.this);         sqlliteCountryAssistant.openDB();           // Insert a few countries that begin with "C"         sqlliteCountryAssistant.insertCountry("Cambodia");         sqlliteCountryAssistant.insertCountry("Cameroon");         sqlliteCountryAssistant.insertCountry("Canada");         sqlliteCountryAssistant.insertCountry("Cape Verde");         sqlliteCountryAssistant.insertCountry("Cayman Islands");         sqlliteCountryAssistant.insertCountry("Chad");         sqlliteCountryAssistant.insertCountry("Chile");         sqlliteCountryAssistant.insertCountry("China");           //sqlliteCountryAssistant.removeCountry("Chad");         //sqlliteCountryAssistant.updateCountry("Canada", "Costa Rica");           String[] countries = sqlliteCountryAssistant.getAllCountries();           // Print out the values to the log         for(int i = 0; i < countries.length; i++)         {             Log.i(this.toString(), countries[i]);         }           ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.list_item, countries);         textView.setAdapter(adapter);     }       public void onDestroy()     {         super.onDestroy();         sqlliteCountryAssistant.close();     } }

We start off creating an instance of the the “SQLiteCountryAssistant” class and then plug some default countries into it. You’ll also notice there is some commented out code you can fiddle with the test out the remove and update functionality. I print the returned countries out to the log and then pass them onto the AutoComplete TextView via an ArrayAdapter.
Before you run the project make sure to go into the run configuration and make the following changes as this will clear the database each time you run the Android emulator.


Now you can run the project and hopefully see something like this if all went well.

Android: Displaying a status bar notification message

First, I created an Android project called “AndroidNotifications”.


The code is fairly simple so I’ll dump it here in it’s complete form:

package com.giantflyingsaucer; import java.util.Timer; import java.util.TimerTask; import android.app.Activity; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.Button; public class AndroidNotifications extends Activity {     private final int NOTIFICATION_ID = 1010;     @Override     public void onCreate(Bundle savedInstanceState)     {         super.onCreate(savedInstanceState);         setContentView(R.layout.main);         Button btn = (Button)findViewById(R.id.createNotificationButton);         btn.setOnClickListener(new View.OnClickListener()         {             @Override             public void onClick(View v)             {                 Timer timer = new Timer();                 TimerTask timerTask = new TimerTask()                 {                     @Override                     public void run()                     {                         triggerNotification();                     }                 };                 timer.schedule(timerTask, 3000);             }         });     }     private void triggerNotification()     {         CharSequence title = "Hello";         CharSequence message = "Hello, Android!";         NotificationManager notificationManager = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);         Notification notification = new Notification(R.drawable.icon, "A New Message!", System.currentTimeMillis());         Intent notificationIntent = new Intent(this, AndroidNotifications.class);         PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);         notification.setLatestEventInfo(AndroidNotifications.this, title, message, pendingIntent);         notificationManager.notify(NOTIFICATION_ID, notification);     } }

The NOTIFICATION_ID allows you to grab the notification and remove it via your code if needed. Using a TimerTask I made it so that the notification shows up after 3 seconds from when the button is clicked. The real magic happens in the “triggerNotification()” method. The code is not complex and is pretty much the most minimal example I could come up with and keeping it pretty clear.
Here is the main.xml:

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:orientation="vertical"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     >     <Button             android:id="@+id/createNotificationButton"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:text="Create Notification"             android:padding="10dp" /> </LinearLayout>

Keep in mind you can also make the LED lights, play a sound or use the vibration feature to also notify the user. Just make sure not to let your Android app get “annoying”. Better yet in your application let the user choose how they want to be notified via custom settings or default settings, etc.
Here is the final result:

TextView font size color layout interface andoid exam

I created a new Android Project in Eclipse called “AndroidFonts”:

From here I modified the “main.xml” file in the layout folder.

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:orientation="vertical"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     >     <TextView         android:orientation="horizontal"         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:text="MonoSpace Font:"         android:textSize="16sp"         android:paddingLeft="5sp"         />     <TextView         android:orientation="horizontal"         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:paddingLeft="5sp"         android:typeface="monospace"         android:text="Hello Red Monospace"         android:textSize="16sp"         android:textColor="#ff0000"         />     <TextView         android:orientation="horizontal"         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:text="Sans Font:"         android:textSize="16sp"         android:paddingLeft="5sp"         />     <TextView         android:orientation="horizontal"         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:paddingLeft="5sp"         android:typeface="sans"         android:text="Hello Blue Sans"         android:textSize="16sp"         android:textColor="#0000ff"         />     <TextView         android:orientation="horizontal"         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:text="Serif Font:"         android:textSize="16sp"         android:paddingLeft="5sp"         />     <TextView         android:orientation="horizontal"         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:paddingLeft="5sp"         android:paddingRight="2sp"         android:typeface="serif"         android:text="Hello Green Serif"         android:textSize="16sp"         android:textColor="#00ff00"         />     <TextView         android:orientation="horizontal"         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:paddingLeft="5sp"         android:paddingTop="15sp"         android:typeface="normal"         android:text="I'm normal font but I'm also bold and italic"         android:textSize="16sp"         android:textStyle="bold|italic"         android:textColor="#ffffff"         />     <TextView         android:orientation="horizontal"         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:paddingLeft="5sp"         android:paddingTop="15sp"         android:paddingBottom="15sp"         android:typeface="normal"         android:text="I'm normal (bold) font but I have a shadow"         android:textSize="16sp"         android:textStyle="bold"         android:shadowColor ="#0f0f0f"         android:shadowRadius="1.6"         android:shadowDx="1.5"         android:shadowDy="1.3"         android:textColor="#000000"         android:background="#ffffff"         /> </LinearLayout>

When I run the project I get this result in the emulator:

As you can see from the code I used the fonts: sans, serif, and monospace. Then I showed off how to make a string bold and italic:

android:textStyle="bold|italic"

Then a string utilizing the shadowing effect:

android:shadowColor ="#0f0f0f" android:shadowRadius="1.6" android:shadowDx="1.5" android:shadowDy="1.3"

Colors are as simple as adding:

android:textColor="#ff0000"

Pretty easy!