Save Amplify query response into local variables, android java

0

Amplify.API.query( ModelQuery.list(MerchantDevices.class, MerchantDevices.DEVICEID.contains(aMerchant.getDeviceId())), // 1623 is CleverPays partner ID with RQ response -> { for (MerchantDevices md : response.getData()) { Log.i("INSIDE", md.getIdapprl()); MerchantConstant.setidAPPRL(md.getIdapprl()); temp.add(md.getIdapprl()); Log.i("AFTER", MerchantConstant.idAPPRL); } }, error -> Log.e("MyAmplifyApp", "Query failure", error) );

            Log.i("INSIDE TEMP", temp.get(0));

INSIDE, and AFTER within reponse {} get the value, but when trying to display outside Amplify query the value is removed. what can I do?

CP
已提問 5 個月前檢視次數 150 次
1 個回答
0

Thank you for reaching out to us regarding the above query.

In order to access the response outside of the Amplify.API.query callback, you can try declaring a variable outside the callback and assign the response inside it. While doing so, kindly be mindful of the asynchronous behavior. Upon researching through some third party discussion, here's an example using a CountDownLatch for synchronization:

import java.util.concurrent.CountDownLatch;


List<MerchantDevices> merchantDevices;
CountDownLatch latch = new CountDownLatch(1);

Amplify.API.query(
    ModelQuery.list(MerchantDevices.class),
    response -> {
        merchantDevices = new ArrayList<>(response.getData());
        latch.countDown(); // Signal => response is available
    },
    error -> {
        Log.e("Amplify", "Error retrieving data: " + error);
        latch.countDown(); // Ensure the latch is counted down in case of an error
    }
);
try {
    latch.await(); // Block until the response is available
    // Now you can use the 'merchantDevices' variable outside the callback
} catch (InterruptedException e) {
    e.printStackTrace();
}

Kindly test the above code in a test environment before using it in production. Additionally, you can find detailed documentation for Amplify's Android API on the documentation below:

Having said that, in case you face further challenges, please feel free to open a support case with AWS using the following link.

AWS
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已回答 5 個月前
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