In App Purchase in an Android App By LetsNurture

How to setup In App purchase in Mo-bile Application Development

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In app purchase Tutorial

Follow Simple Steps to add In app purchase in Project.

Note: To use the In-app Billing Version 3 features, you must add the IInAppBillingService.aidl file to your Android project. This Android Interface Definition Language (AIDL) file defines the interface to the Google Play service.

Step 1:

You can find the IinAppBillingService.aidl file in the provided sample app.

To add the In-app Billing Version 3 library to your existing In-app Billing project:

1.Copy the IinAppBillingService.aidl file to your Android project.

If you are using Eclipse: Import the IinAppBillingService.aidl file into your /src directory.

2.Build your application. You should see a generated file named IinAppBillingService.java in the /gen directory of your project.

3.Add the helper classes from the /util directory of the SampleProject sample to your project. Remember to change the package name declarations in those files accordingly so that your project compiles correctly.

Your project should now contain the In-app Billing Version 3 library.

Step 2:


Set the Billing Permission

--app needs to have permission to communicate request and response messages to the Google Play’s billing service. To give your app the necessary permission, add this line in your AndroidManifest.xml manifest file:

<uses-permission android:name="com.android.vending.BILLING" />

Step 3:

Connect with Google Play.

To set up synchronous communication with Google Play, create an IabHelper instance in your activity's onCreate method. In the constructor, pass in the Context for the activity, along with a string containing the public license key that is your apps base64 key retrieved from play store console. When you are using in testing mode at that time no need to provide base64 key but needs to define it.

// The helper object in app-billing object

IabHelper mHelper;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

// init view

text = (TextView) findViewById(R.id.text);

btn_purchase = (Button) findViewById(R.id.btn_purchase);

apple = (ImageView) findViewById(R.id.imageView1);


// init in app purchase object.

Log.e(TAG, "Creating IAB helper.");

mHelper = new IabHelper(this, base64EncodedPublicKey);

mHelper.startSetup(mSetupListner);

btn_purchase.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View arg0) {

// TODO Auto-generated method stub

// do call purchase

String payload = "";

mHelper.launchPurchaseFlow(MainActivity.this, SKU_GAS,

RC_REQUEST, mPurchaseFinishedListener, payload);

}

});

}

Now bing service by calling mHelper.startSetup(mSetupListner); method on the IabHelper instance that you created. Pass the method an OnIabSetupFinishedListener instance, which is called once the IabHelper completes the asynchronous setup operation. Here we also check if the in-app billing is supported or not If the API version is not supported, or if an error occurred while establishing the service binding, the listener is notified and passed an IabResult object with the error message.

// setup listener for in app.

IabHelper.OnIabSetupFinishedListener mSetupListner = new


IabHelper.OnIabSetupFinishedListener() {

public void onIabSetupFinished(IabResult result) {

Log.d(TAG, "Setup finished.");

if (!result.isSuccess()) {

Log.e("Problem setting up in-app billing: ", result + "//");

return;

}

// Have we been disposed of in the meantime? If so, quit.

if (mHelper == null)

return;

// IAB is fully set up. Now, let's get an inventory of stuff we own.

Log.e(TAG, "Setup successful. Querying inventory.");

mHelper.queryInventoryAsync(mGotInventoryListener);// Query Items

}

};

Note: Remember to unbind from the In-app Billing service when you are done with activity. If we don’t unbind, the open service connection could cause your device’s performance to degrade.

@Override

public void onDestroy() {

super.onDestroy();

if (mHelper != null)

mHelper.dispose();


mHelper = null;

}

Step 4:

Query Items Available for Purchase

Query Google Play programmatically to retrieve details of the in-app products that are associated with app.

To retrieve the product details, call queryInventoryAsync(QueryInventoryFinishedListener) on your IabHelper instance.

This is useful, for example, when you want to display a listing of unowned items that are still available for purchase to users. And restore owned items that already purchased.

The following code shows how you can retrieve the details for products with Id SKU_APPLE that you previously defined in the Developer Console.

SKU_APPLE contains your apps product Ids

// to check whether user already purchased or not to recover product.

IabHelper.QueryInventoryFinishedListener mGotInventoryListener = new IabHelper.QueryInventoryFinishedListener() {

public void onQueryInventoryFinished(IabResult result,

Inventory inventory) {

Log.d(TAG, "Query inventory finished.");

// Have we been disposed of in the meantime? If so, quit.

if (mHelper == null)


return;

// Is it a failure?

if (result.isFailure()) {

Log.e("Failed to query inventory: ", result + "//");

return;

}

Log.e(TAG, "Query inventory was successful.");

/*

* Check for items we own. Notice that for each purchase, we check

* the developer payload to see if it's correct! See

* verifyDeveloperPayload().

*/

// Check for Purchase apple -- if we own apple, we should

Purchase gasPurchase = inventory.getPurchase(SKU_APPLE);

if (gasPurchase != null) {

Log.e(TAG, "We own this item invetry ");

isPurchsed = true;

}

updateUi();

Log.d(TAG, "Initial inventory query finished; enabling main UI.");

return;

}

};

check product is purchased or not and update your apps UI according to purchase.

// Check for Purchase apple -- if we own apple, we should


Purchase gasPurchase = inventory.getPurchase(SKU_APPLE);

if (gasPurchase != null) {

Log.e(TAG, "We own this item invetry ");

isPurchsed = true;

}

Step 5:

Purchase an Item

To start a purchase request from your app, call launchPurchaseFlow(Activity, String, int, OnIabPurchaseFinishedListener, String) on your IabHelper instance. You must make this call from the main thread of your Activity.

The first argument is the calling Activity.

The second argument is the product ID (also called its SKU) of the item to purchase. Make sure that you are providing the ID and not the product name. You must have previously defined and activated the item in the Developer Console, otherwise it won’t be recognized.

The third argument is a request code value. This value can be any positive integer. Google Play returns this request code to the calling Activity’s onActivityResult along with the purchase response.

The fourth argument is a listener that is notified when the purchase operation has completed and handles the purchase response from Google Play.

The fifth argument contains a ‘developer payload’ string that you can use to send supplemental information about an order (it can be an empty string). Typically, this is used to pass in a string token that uniquely identifies this purchase request. If you specify a string value, Google Play returns this string along with the purchase response. Subsequently, when you make queries about this purchase, Google Play returns this string together with the purchase details.

Check example here // do call purchase

String payload = "";

mHelper.launchPurchaseFlow(MainActivity.this, SKU_APPLE,


RC_REQUEST, mPurchaseFinishedListener, payload);

If the purchase order is successful, the response data from Google Play is stored in an Purchase object that is passed back to the listener mPurchaseFinishedListener.

The following example shows how you can handle the purchase response in the listener, depending on whether the purchase order was completed successfully,

check which product is purchased and make change accordingly in app

IabHelper.OnIabPurchaseFinishedListener mPurchaseFinishedListener = new IabHelper.OnIabPurchaseFinishedListener() {

public void onIabPurchaseFinished(IabResult result, Purchase purchase) {

Log.d(TAG, "Purchase finished: " + result + ", purchase: "

+ purchase);

// if we were disposed of in the meantime, quit.

if (mHelper == null) {

isPurchsed = false;

return;

}

if (result.isFailure()) {

Log.e("Error purchasing: ", result + "//");

isPurchsed = false;

return;

}

Log.e(TAG, "Purchase successful.");

if (purchase.getSku().equals(SKU_APPLE)) {

Log.e(TAG, "Purchase own item purchase lisner");

isPurchsed = true;


}

updateUi();

}

};

It is good practice to update the UI immediately so that your users can see their newly purchased items.

We must have to check every time that which product is purchased to make update.

Test app with test ids android.test.purchased instead of productId.


In App Purchase in an Android App By LetsNurture

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