应用内购买以删除广告 - Android/Kotlin

Question

我在 Google 商店（在 Kotlin 中）有一些带有 AdMob 的应用，现在我想添加应用内购买来删除广告。 我一直在寻找一些好的教程，但没有结果，因为它们都太老了（2016-2017）。

谁能指导我，如何实现这个？ 我知道我可以使用 SharedPreferences，但如果有人重新安装我的应用程序或删除内存，他将丢失购买的项目。

感谢大家的帮助！

@编辑 购买在我的 MainActivity 中，用户应该可以在点击按钮后购买 Remove Ads，其 id 为“noAdsButton”，我的产品在 Google Play 中的 id 为“no_ads”

 private lateinit var mBillingClient: BillingClient


...



    open fun onPurchasesUpdated(
        billingResult: BillingResult,
        list: List<Purchase>?
    ): Unit {
        if (billingResult.responseCode == BillingClient.BillingResponseCode.OK
            && list != null
        ) {
            for (purchase in list) {
                if (purchase.purchaseState == Purchase.PurchaseState.PURCHASED) {
                    if (!purchase.isAcknowledged) {
                        val acknowledgePurchaseParams =
                            AcknowledgePurchaseParams.newBuilder()
                                .setPurchaseToken(purchase.purchaseToken)
                                .build()
                        mBillingClient.acknowledgePurchase(
                            acknowledgePurchaseParams,
                            AcknowledgePurchaseResponseListener { billingResult ->
                                if (billingResult.responseCode == BillingClient.BillingResponseCode.OK) {
                                    Toast.makeText(
                                        this@MainActivity,
                                        "Ads Removed",
                                        Toast.LENGTH_SHORT
                                    ).show()
                                    preferences.edit().putBoolean("show_ads", false).apply()
                                    startActivity(
                                        Intent(
                                            this@MainActivity,
                                            MainActivity::class.java
                                        )
                                    )
                                    finish()
                                } else {
                                    Toast.makeText(
                                        this@MainActivity,
                                        "Error",
                                        Toast.LENGTH_LONG
                                    ).show()
                                }
                            })
                    }
                }
            }
        } else if (billingResult.responseCode == BillingClient.BillingResponseCode.USER_CANCELED) {
            Toast.makeText(this, "Cancelled", Toast.LENGTH_SHORT).show()
        } else if (billingResult.responseCode == BillingClient.BillingResponseCode.ITEM_ALREADY_OWNED) {
            preferences.edit().putBoolean("show_ads", false).apply()
            Toast.makeText(this, "Ads removed because you buy before", Toast.LENGTH_LONG).show()
        } else {
            Toast.makeText(this, "Error", Toast.LENGTH_SHORT).show()
        }
    }

当我想开始购买时，我应该在按钮上设置 onClickListener 并启动函数 onPurchasesUpdated("what here?")

Answer 1

如果有人重新安装您的应用丢失了购买的商品，但他/她可以免费再次购买。我为此使用 SharedPreferences 并且它有效。

您可以使用 ITEM_ALREAY_OWNED 方法进行控制

if(billingResult.getResponseCode() == BillingClient.BillingResponseCode.ITEM_ALREADY_OWNED) {
    preferences.edit().putBoolean("show_ads", false).apply();
    Toast.makeText(this, "Ads removed because you buy before", Toast.LENGTH_LONG).show();
   }

和所有

 @Override
public void onPurchasesUpdated(BillingResult billingResult, @Nullable List<Purchase> list) {
    if (billingResult.getResponseCode() == BillingClient.BillingResponseCode.OK
            && list != null) {
        for (Purchase purchase : list) {
            if(purchase.getPurchaseState() == Purchase.PurchaseState.PURCHASED){
                if(!purchase.isAcknowledged()){
                    AcknowledgePurchaseParams acknowledgePurchaseParams =
                            AcknowledgePurchaseParams.newBuilder()
                                    .setPurchaseToken(purchase.getPurchaseToken())
                                    .build();
                    mBillingClient.acknowledgePurchase(acknowledgePurchaseParams, new AcknowledgePurchaseResponseListener() {
                        @Override
                        public void onAcknowledgePurchaseResponse(BillingResult billingResult) {
                            if(billingResult.getResponseCode()== BillingClient.BillingResponseCode.OK) {
                                Toast.makeText(MainActivity.this, "Ads Removed", Toast.LENGTH_SHORT).show();
                                preferences.edit().putBoolean("show_ads", false).apply();
                                startActivity(new Intent(MainActivity.this, MainActivity.class));
                                finish();
                            }else{
                                Toast.makeText(MainActivity.this, "Error", Toast.LENGTH_LONG).show();
                            }
                        }
                    });
                }

            }
        }
    } else if (billingResult.getResponseCode() == BillingClient.BillingResponseCode.USER_CANCELED) {
        Toast.makeText(this, "Cancelled", Toast.LENGTH_SHORT).show();
    } else if(billingResult.getResponseCode() == BillingClient.BillingResponseCode.ITEM_ALREADY_OWNED) {
        preferences.edit().putBoolean("show_ads", false).apply();
        Toast.makeText(this, "Ads removed because you buy before", Toast.LENGTH_LONG).show();
    }else{
        Toast.makeText(this, "Error", Toast.LENGTH_SHORT).show();
    }

}

及设置计费方式

    private void setupBilling() {
    mBillingClient = BillingClient.newBuilder(MainActivity.this).setListener(this).enablePendingPurchases().build();
    mBillingClient.startConnection(new BillingClientStateListener() {
        @Override
        public void onBillingSetupFinished(BillingResult billingResult) {
            if (billingResult.getResponseCode() ==  BillingClient.BillingResponseCode.OK) {
                Toast.makeText(MainActivity.this, "Ödeme sistemi etkin", Toast.LENGTH_SHORT).show();

                final List<String> skuList = new ArrayList<> ();
                skuList.add("remove_ads");
                final SkuDetailsParams.Builder params = SkuDetailsParams.newBuilder();
                params.setSkusList(skuList).setType(BillingClient.SkuType.INAPP);
                mBillingClient.querySkuDetailsAsync(params.build(), new SkuDetailsResponseListener() {
                    @Override
                    public void onSkuDetailsResponse(BillingResult billingResult, List<SkuDetails> list) {
                        if (billingResult.getResponseCode() == BillingClient.BillingResponseCode.OK && list != null) {
                            BillingFlowParams flowParams = BillingFlowParams.newBuilder()
                                    .setSkuDetails(list.get(0))
                                    .build();
                            mBillingClient.launchBillingFlow(MainActivity.this, flowParams);
                        }
                    }
                });
            }else{
                Toast.makeText(MainActivity.this, "Ödeme sistemi için google play hesabını kontrol ediniz", Toast.LENGTH_SHORT).show();
            }
        }
        @Override
        public void onBillingServiceDisconnected() {
            Toast.makeText(MainActivity.this, "Ödeme sistemi şuanda geçerli değil", Toast.LENGTH_SHORT).show();
        }
    });
}