Adding google maps to android

Android camera .set wallapaper

Android Camera App Tutorial

             In this tutorial how to take a photo using the Android Phone camera and set the photo as wallpaper.Here we are using a Image View and 2 buttons for two actions.Lets start learning.

STEP BY STEP

Facebook key-android hash key

To get android key hash code follow these steps (for facebook apps)

1. Download the openssl for windows here
2. now unzip to c drive
3. open cmd prompt
4. type cd C:\Program Files\Java\jdk1.6.0_26\bin
5. then type only keytool -export -alias myAlias -keystore C:\Users\your user name\.android\myKeyStore | C:\openssl-0.9.8k_WIN32\bin\openssl sha1 -binary | C:\openssl-0.9.8k_WIN32\bin\openssl enc -a -e

i.e

keytool -exportcert -alias androiddebugkey -keystore C:\Users\YOURUSERNAME\.android\debug.keystore | C:\openssl-0.9.8k_WIN32\bin\openssl sha1 -binary | C:\openssl-0.9.8k_WIN32\bin\openssl enc -a -e

ENTER PASSWORD: android 

1. Done

GOOGLE MAPS KEY

1. open cmd prompt
2. type cd C:\Program Files\Java\jdk1.7.0_10\bin
3. then type  

keytool -v -list -alias androiddebugkey -keystore "C:\Users\YOUR USERNAME\.android\debug.keystore" 

password is android

4.copy md5 and sh1 

Simple Camera App Android

Java file

How to change images on imageView after some interval

public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);``
//
//
int []imageArray={R.drawable.img1,R.drawable.img2,R.drawable.img3};


final Handler handler = new Handler();
         Runnable runnable = new Runnable() {
            int i=0;
            public void run() {
                imageView.setImageResource(imageArray[i]);
                i++;
                if(i>imageArray.length-1)
                {
                i=0;    
                }
                handler.postDelayed(this, 50);  //for interval...
            }
        };
        handler.postDelayed(runnable, 2000); //for initial delay..
    }

Change text size/font size of a tabhost?

You can define themes, use styles to achieve this:

First you create the theme (name:CustomTheme) for your Activity in your res/styles.xml:

<style name="CustomTheme" parent="@android:style/Theme">
    <item name="android:tabWidgetStyle">@style/CustomTabWidget</item>
</style>
<style name="CustomTabWidget" parent="@android:style/Widget.TabWidget">
    <item name="android:textAppearance">@style/CustomTabWidgetText</item>
</style>
<style name="CustomTabWidgetText" 
    parent="@android:style/TextAppearance.Widget.TabWidget">
    <item name="android:textSize">20sp</item>
    <item name="android:textStyle">bold</item>
</style>

Then in your androidManifest.xml you specify the theme above for your TabActivity orActivity containing your TabWidget:

<activity android:name="MyTabActivity" android:theme="@style/CustomTheme">

This will serve you with the output you want (of course you should change the size and style for your preference).

http://stackoverflow.com/questions/5788971/how-to-change-the-font-size-of-tabhost-in-android

Check internet connection on Android Phone

public boolean isInternetAvailable(){
//If not in activity
// ConnectivityManager cManager = (ConnectivityManager) Context.getSystemService(Context.CONNECTIVITY_SERVICE);

//if in Activity
ConnectivityManager cManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo nInfo = cManager.getActiveNetworkInfo();
if(nInfo == null)
return false;
else
return nInfo.isConnected();
}




and onclick event

 if(isInternetAvailable()){
        do something
        }else {
       
        Toast.makeText(getApplicationContext(), "You must be connected to the internet", Toast.LENGTH_LONG).show();
        }