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ファイルを削除する

remove API を使用してストレージバケットからファイルを削除できます。ファイルが ID で保護されている場合、そのファイルを削除できるのはそのファイルを所有するユーザーのみです。

Amplify.Storage.remove(
    StoragePath.fromString("public/myUploadedFileName.txt"),
    result -> Log.i("MyAmplifyApp", "Successfully removed: " + result.getPath()),
    error -> Log.e("MyAmplifyApp", "Remove failure", error)

Amplify.Storage.remove(StoragePath.fromString("public/myUploadedFileName.txt"),
    { Log.i("MyAmplifyApp", "Successfully removed: ${it.path}") },
    { Log.e("MyAmplifyApp", "Remove failure", it) }

    val result = Amplify.Storage.remove(StoragePath.fromString("public/myUploadedFileName.txt"))
    Log.i("MyAmplifyApp", "Successfully removed: ${result.path}")
} catch (error: StorageException) {
    Log.e("MyAmplifyApp", "Remove failure", error)

RxAmplify.Storage.remove(StoragePath.fromString("public/myUploadedFileName.txt"))
        .subscribe(
            result -> Log.i("MyAmplifyApp", "Successfully removed: " + result.getPath()),
            error -> Log.e("MyAmplifyApp", "Remove failure", error)

指定されたバケットからファイルを削除する

bucket オプションを指定して、特定のバケットから削除操作を実行することもできます。Amplify Backend で割り当てられたターゲットバケットの名前を表す文字列を渡すことができます。

StorageBucket secondBucket = StorageBucket.fromOutputs("secondBucket");
StorageRemoveOptions options = StorageRemoveOptions.builder()
    .bucket(secondBucket)
    .build();
Amplify.Storage.remove(
    StoragePath.fromString("public/myUploadedFileName.txt"), 
    options,
    result -> Log.i("MyAmplifyApp", "Successfully removed: " + result.getPath()),
    error -> Log.e("MyAmplifyApp", "Remove failure", error)

val secondBucket = StorageBucket.fromOutputs("secondBucket")
val options = StorageRemoveOptions.builder()
    .bucket(secondBucket)
    .build()
Amplify.Storage.remove(StoragePath.fromString("public/myUploadedFileName.txt"), options,
    { Log.i("MyAmplifyApp", "Successfully removed: ${it.path}") },
    { Log.e("MyAmplifyApp", "Remove failure", it) }

val secondBucket = StorageBucket.fromOutputs("secondBucket")
val options = StorageRemoveOptions.builder()
    .bucket(secondBucket)
    .build()
    val result = Amplify.Storage.remove(StoragePath.fromString("public/myUploadedFileName.txt"), options)
    Log.i("MyAmplifyApp", "Successfully removed: ${result.path}")
} catch (error: StorageException) {
    Log.e("MyAmplifyApp", "Remove failure", error)

StorageBucket secondBucket = StorageBucket.fromOutputs("secondBucket");
StorageRemoveOptions options = StorageRemoveOptions.builder()
    .bucket(secondBucket)
    .build(); 
RxAmplify.Storage.remove(StoragePath.fromString("public/myUploadedFileName.txt"), options)
        .subscribe(
            result -> Log.i("MyAmplifyApp", "Successfully removed: " + result.getPath()),
            error -> Log.e("MyAmplifyApp", "Remove failure", error)

または、コンソールからバケット名とリージョンを指定してオブジェクトを渡すこともできます。

BucketInfo bucketInfo = new BucketInfo("second-bucket-name-from-console", "us-east-2");
StorageBucket secondBucket = StorageBucket.fromBucketInfo(bucketInfo);
StorageRemoveOptions options = StorageRemoveOptions.builder()
    .bucket(secondBucket)
    .build(); 
Amplify.Storage.remove(
    StoragePath.fromString("public/myUploadedFileName.txt"),
    options,
    result -> Log.i("MyAmplifyApp", "Successfully removed: " + result.getPath()),
    error -> Log.e("MyAmplifyApp", "Remove failure", error)

val bucketInfo = BucketInfo("second-bucket-name-from-console", "us-east-2")
val secondBucket = StorageBucket.fromBucketInfo(bucketInfo)
val options = StorageRemoveOptions.builder()
    .bucket(secondBucket)
    .build()
Amplify.Storage.remove(StoragePath.fromString("public/myUploadedFileName.txt"), options,
    { Log.i("MyAmplifyApp", "Successfully removed: ${it.path}") },
    { Log.e("MyAmplifyApp", "Remove failure", it) }

val bucketInfo = BucketInfo("second-bucket-name-from-console", "us-east-2")
val secondBucket = StorageBucket.fromBucketInfo(bucketInfo)
val options = StorageRemoveOptions.builder()
    .bucket(secondBucket)
    .build()
    val result = Amplify.Storage.remove(StoragePath.fromString("public/myUploadedFileName.txt"), options)
    Log.i("MyAmplifyApp", "Successfully removed: ${result.path}")
} catch (error: StorageException) {
    Log.e("MyAmplifyApp", "Remove failure", error)

BucketInfo bucketInfo = new BucketInfo("second-bucket-name-from-console", "us-east-2");
StorageBucket secondBucket = StorageBucket.fromBucketInfo(bucketInfo);
StorageRemoveOptions options = StorageRemoveOptions.builder()
    .bucket(secondBucket)
    .build(); 
RxAmplify.Storage.remove(StoragePath.fromString("public/myUploadedFileName.txt"), options)
        .subscribe(
            result -> Log.i("MyAmplifyApp", "Successfully removed: " + result.getPath()),
            error -> Log.e("MyAmplifyApp", "Remove failure", error)