android - 自动填充服务未显示在设置自动填充服务列表中

Question

我正在尝试开发一个简单的应用程序，它使用 Android Oreo 中的自动填充框架在其他应用程序中自动填充电子邮件。我已按照本教程开发应用程序。但是运行该应用程序后，我无法在设置中的自动填充服务列表中看到我的自动填充服务来启动它。不知道为什么，求大神帮忙！

这是我构建自动填充服务的代码：

我的服务：

public class EmailAddFiller extends AutofillService {
@Override
public void onFillRequest( @NonNull FillRequest request, @NonNull CancellationSignal cancellationSignal, FillCallback callback) {
    List<AssistStructure.ViewNode> emailFields = new ArrayList<>();
    // Get the structure from the request
    List<FillContext> context = request.getFillContexts();
    AssistStructure structure = context.get(context.size() - 1).getStructure();
    identifyEmailFields(structure
            .getWindowNodeAt(0)
            .getRootViewNode(), emailFields);
    AssistStructure.ViewNode emailField = emailFields.get(0);
    SharedPreferences sharedPreferences =
            getSharedPreferences("EMAIL_STORAGE", MODE_PRIVATE);

    String primaryEmail =
            sharedPreferences.getString("PRIMARY_EMAIL", "");
    String secondaryEmail =
            sharedPreferences.getString("SECONDARY_EMAIL", "");
    Dataset primaryEmailDataSet =
            new Dataset.Builder()
                    .setValue(
                            emailField.getAutofillId(),
                            AutofillValue.forText(primaryEmail)
                    ).build();

    Dataset secondaryEmailDataSet =
            new Dataset.Builder()
                    .setValue(
                            emailField.getAutofillId(),
                            AutofillValue.forText(secondaryEmail)
                    ).build();
    FillResponse response = new FillResponse.Builder()
            .addDataset(primaryEmailDataSet)
            .addDataset(secondaryEmailDataSet)
            .build();

    callback.onSuccess(response);
}

private void identifyEmailFields(AssistStructure.ViewNode node, List<AssistStructure.ViewNode> emailFields) {
    if(node.getClassName().contains("EditText")) {
        String viewId = node.getIdEntry();
        if(viewId!=null && (viewId.contains("email")
                || viewId.contains("username"))) {
            emailFields.add(node);
            return;
        }
    }
    for(int i=0; i<node.getChildCount();i++) {
        identifyEmailFields(node.getChildAt(i), emailFields);
    }
}

@Override
public void onSaveRequest(@NonNull SaveRequest request, @NonNull SaveCallback callback) {

}

}

以及 Manifestation 文件中的配置：

<?xml version="1.0" encoding="utf-8"?>

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity
        android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <service android:name=".EmailAddFiller"
        android:label="My Autofill Service"
        android:permission="android.permission.BIND_AUTO_FILL">
        <meta-data android:name="android.autofill"
            android:resource="@xml/email_address_filler"/>
        <intent-filter>
            <action android:name="android.service.autofill.AutoFillService"/>
        </intent-filter>
    </service>
</application>

并构建 gradle：

    apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.example.tam.autofillapp"
        minSdkVersion 26
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:28.0.0'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    implementation 'org.jetbrains:annotations-java5:15.0'
    implementation 'com.android.support:design:28.+'

}

我错过了什么吗？如果有关于该主题的任何其他示例，非常感谢。非常感谢！

标签： androidandroid-service