# Google 支付

## 初始化

> ####  API介绍

使用谷歌支付

> #### API原型

```java
/**
 * 初始化谷歌内购实例
 * @param activity 当前Activity
 * @param publicKey 谷歌PublicKey
 * @param orderDetail 订单信息
 * @param billingCallback 购买回调
 * @param isDebug 是否是Debug,Debug模式下会输出日志到SD卡中
 * @return
 */
public static GoogleBillingSupport newBillingInstance(Activity activity, String publicKey, OrderDetail orderDetail, BillingCallback billingCallback, boolean isDebug) 
```

初始化以上方法之后，在结果回调接口  `BillingCallback` 的   `onBillingInitialized()` 方法中，调用购买方法：

## 商品购买

```java
/**
 * 购买
 */
public void purchase() 
```

> #### 示例

```java
private GoogleBillingSupport googleBillingSupport;
```

```java
//实例化订单详情
OrderDetail orderDetail = new OrderDetail();
orderDetail.setGid(NgamesUtil.getAppId(MainActivity.this));//设置游戏ID
orderDetail.setItemid("ipa.tg.na002");//设置商品ID
orderDetail.setLang(Const.LANG_EN);//设置语言
orderDetail.setSid("1");//设置服务器ID
orderDetail.setSname("test");//设置服务器名称
orderDetail.setTime(String.valueOf(System.currentTimeMillis()));//设置当前时间
orderDetail.setType("123");//设置类型
orderDetail.setUid(ngamesSdk.getCurrentUserId());//设置当前用户ID
orderDetail.setUsername("test");//设置用户帐号

googleBillingSupport = GoogleBillingSupport.newBillingInstance(MainActivity.this, getString(R.string.base64EncodedPublicKey), orderDetail, new BillingCallback() {
    @Override
    public void onPurchased(String productId, String orderId) {
        //购买成功
        logText.setText("orderId=" + orderId);
    }
    
    @Override
    public void onBillingInitialized() {
        //购买商品
        googleBillingSupport.purchase();
    }
    
    @Override
    public void onError(int errorCode) {
        //购买失败
        logText.setText("errorCode=" + errorCode);
    }
}, false);
```

{% hint style="info" %}
 初始化订单的回调接口  `BillingCallback` 的   `onBillingInitialized()` 方法中，必须调用购买方法

```java
googleBillingSupport.purchase();
```

{% endhint %}

## 生命周期

### 1.onResume

#### 在主Activity#onResume中 <a href="#src-cnt-0-0" id="src-cnt-0-0"></a>

```java
...
@Override
protected void onResume() {
    super.onResume();
    ...
    if (googleBillingSupport != null) {
        googleBillingSupport.onResume();
    }
}
```

### 2.onDestroy

#### 在主Activity#onDestroy中 <a href="#src-cnt-0-0" id="src-cnt-0-0"></a>

```java
...
@Override
protected void onDestroy() {
    super.onDestroy();
    ...
    if (googleBillingSupport != null) {
        googleBillingSupport.onDestroy();
    }
}
```

### 3.onActivityResult

#### 在主Activity#onActivityResult中 <a href="#src-cnt-0-0" id="src-cnt-0-0"></a>

```java
...
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    ...
    if (googleBillingSupport != null && googleBillingSupport.handleActivityResult(requestCode, resultCode, data)) {
        return;
    }
    ...
    super.onActivityResult(requestCode, resultCode, data);
}
```


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