消費類應用程式內購買
耗材管理產品是可以多次購買的產品，例如遊戲內貨幣，遊戲生活，加電等。
在這個例子中，我們將實現 4 種不同的耗材管理產品 "item1", "item2", "item3", "item4"。
總結步驟：
- 將應用內結算庫新增到專案（AIDL 檔案）。
- 在
AndroidManifest.xml檔案中新增所需的許可權。- 將已簽名的 apk 部署到 Google Developers Console。
- 定義你的產品。
- 實現程式碼。
- 測試應用內結算（可選）。
步驟 1：
首先，我們需要將 AIDL 檔案新增到你的專案在谷歌文件解釋清楚這裡 。
IInAppBillingService.aidl 是一個 Android 介面定義語言（AIDL）檔案，用於定義應用內結算版本 3 服務的介面。你將使用此介面通過呼叫 IPC 方法呼叫來進行計費請求。
第 2 步：
新增 AIDL 檔案後，在 AndroidManifest.xml 中新增 BILLING 許可權：
<!-- Required permission for implementing In-app Billing -->
<uses-permission android:name="com.android.vending.BILLING" />
第 3 步：
生成已簽名的 apk，並將其上傳到 Google Developers Console。這是必需的，以便我們可以開始在那裡定義我們的應用內產品。
第 4 步：
使用不同的 productID 定義所有產品，併為每個產品設定價格。有兩種型別的產品（管理產品和訂閱）。正如我們已經說過的，我們將實施 4 種不同的耗材管理產品 "item1", "item2", "item3", "item4"。
第 5 步：
完成上述所有步驟後，你現在可以開始在自己的活動中實現程式碼。
主要活動：
public class MainActivity extends Activity {
IInAppBillingService inAppBillingService;
ServiceConnection serviceConnection;
// productID for each item. You should define them in the Google Developers Console.
final String item1 = "item1";
final String item2 = "item2";
final String item3 = "item3";
final String item4 = "item4";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Instantiate the views according to your layout file.
final Button buy1 = (Button) findViewById(R.id.buy1);
final Button buy2 = (Button) findViewById(R.id.buy2);
final Button buy3 = (Button) findViewById(R.id.buy3);
final Button buy4 = (Button) findViewById(R.id.buy4);
// setOnClickListener() for each button.
// buyItem() here is the method that we will implement to launch the PurchaseFlow.
buy1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
buyItem(item1);
}
});
buy2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
buyItem(item2);
}
});
buy3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
buyItem(item3);
}
});
buy4.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
buyItem(item4);
}
});
// Attach the service connection.
serviceConnection = new ServiceConnection() {
@Override
public void onServiceDisconnected(ComponentName name) {
inAppBillingService = null;
}
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
inAppBillingService = IInAppBillingService.Stub.asInterface(service);
}
};
// Bind the service.
Intent serviceIntent = new Intent("com.android.vending.billing.InAppBillingService.BIND");
serviceIntent.setPackage("com.android.vending");
bindService(serviceIntent, serviceConnection, BIND_AUTO_CREATE);
// Get the price of each product, and set the price as text to
// each button so that the user knows the price of each item.
if (inAppBillingService != null) {
// Attention: You need to create a new thread here because
// getSkuDetails() triggers a network request, which can
// cause lag to your app if it was called from the main thread.
Thread thread = new Thread(new Runnable() {
@Override
public void run() {
ArrayList<String> skuList = new ArrayList<>();
skuList.add(item1);
skuList.add(item2);
skuList.add(item3);
skuList.add(item4);
Bundle querySkus = new Bundle();
querySkus.putStringArrayList("ITEM_ID_LIST", skuList);
try {
Bundle skuDetails = inAppBillingService.getSkuDetails(3, getPackageName(), "inapp", querySkus);
int response = skuDetails.getInt("RESPONSE_CODE");
if (response == 0) {
ArrayList<String> responseList = skuDetails.getStringArrayList("DETAILS_LIST");
for (String thisResponse : responseList) {
JSONObject object = new JSONObject(thisResponse);
String sku = object.getString("productId");
String price = object.getString("price");
switch (sku) {
case item1:
buy1.setText(price);
break;
case item2:
buy2.setText(price);
break;
case item3:
buy3.setText(price);
break;
case item4:
buy4.setText(price);
break;
}
}
}
} catch (RemoteException | JSONException e) {
e.printStackTrace();
}
}
});
thread.start();
}
}
// Launch the PurchaseFlow passing the productID of the item the user wants to buy as a parameter.
private void buyItem(String productID) {
if (inAppBillingService != null) {
try {
Bundle buyIntentBundle = inAppBillingService.getBuyIntent(3, getPackageName(), productID, "inapp", "bGoa+V7g/yqDXvKRqq+JTFn4uQZbPiQJo4pf9RzJ");
PendingIntent pendingIntent = buyIntentBundle.getParcelable("BUY_INTENT");
startIntentSenderForResult(pendingIntent.getIntentSender(), 1003, new Intent(), 0, 0, 0);
} catch (RemoteException | IntentSender.SendIntentException e) {
e.printStackTrace();
}
}
}
// Unbind the service in onDestroy(). If you don’t unbind, the open
// service connection could cause your device’s performance to degrade.
@Override
public void onDestroy() {
super.onDestroy();
if (inAppBillingService != null) {
unbindService(serviceConnection);
}
}
// Check here if the in-app purchase was successful or not. If it was successful,
// then consume the product, and let the app make the required changes.
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 1003 && resultCode == RESULT_OK) {
final String purchaseData = data.getStringExtra("INAPP_PURCHASE_DATA");
// Attention: You need to create a new thread here because
// consumePurchase() triggers a network request, which can
// cause lag to your app if it was called from the main thread.
Thread thread = new Thread(new Runnable() {
@Override
public void run() {
try {
JSONObject jo = new JSONObject(purchaseData);
// Get the productID of the purchased item.
String sku = jo.getString("productId");
String productName = null;
// increaseCoins() here is a method used as an example in a game to
// increase the in-game currency if the purchase was successful.
// You should implement your own code here, and let the app apply
// the required changes after the purchase was successful.
switch (sku) {
case item1:
productName = "Item 1";
increaseCoins(2000);
break;
case item2:
productName = "Item 2";
increaseCoins(8000);
break;
case item3:
productName = "Item 3";
increaseCoins(18000);
break;
case item4:
productName = "Item 4";
increaseCoins(30000);
break;
}
// Consume the purchase so that the user is able to purchase the same product again.
inAppBillingService.consumePurchase(3, getPackageName(), jo.getString("purchaseToken"));
Toast.makeText(MainActivity.this, productName + " is successfully purchased. Excellent choice, master!", Toast.LENGTH_LONG).show();
} catch (JSONException | RemoteException e) {
Toast.makeText(MainActivity.this, "Failed to parse purchase data.", Toast.LENGTH_LONG).show();
e.printStackTrace();
}
}
});
thread.start();
}
}
}
第 6 步：
實現程式碼後，你可以通過將 apk 部署到 beta / alpha 通道來測試它，並讓其他使用者為你測試程式碼。但是，在測試模式下無法進行真正的應用內購買。你必須首先將你的應用/遊戲釋出到 Play 商店，以便完全啟用所有產品。
有關測試應用內結算的更多資訊，請點選此處 。