android - Activity Transition API 调用 Intent

Question

ActivityTransitionUpdate 始终返回 null。但是，如果我将其更改为 requestactivityupdate，它就可以正常工作。但我需要转换 API。我不明白为什么这不起作用，特别是几天前它工作正常。

我尝试过重写代码，在网络上到处查看，从其他项目中复制显然有效的代码，但 requestActivityTransitionUpdates 不想再工作了。我还卸载并重新安装了 android studio，但没有任何效果。

主要 Activity ''''

private List<ActivityTransition> transitions;

    private ActivityRecognitionClient activityRecognitionClient;

    private PendingIntent transitionPendingIntent;
    private Context mContext;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

       System.out.println(getExternalCacheDir());
        Log.i(TAG, "ON");

        mContext = this;
        activityRecognitionClient = ActivityRecognition.getClient(mContext);

        Intent intent = new Intent(mContext, TransitionIntentService.class);

        transitionPendingIntent = PendingIntent.getService(this, 100, intent, PendingIntent.FLAG_UPDATE_CURRENT);


    }


    public void registerHandler(View view) {

        transitions = new ArrayList<>();


        transitions.add(new ActivityTransition.Builder()
                .setActivityType(DetectedActivity.WALKING)
                .setActivityTransition(ActivityTransition.ACTIVITY_TRANSITION_ENTER)
                .build());


        transitions.add(new ActivityTransition.Builder()
                .setActivityType(DetectedActivity.WALKING)
                .setActivityTransition(ActivityTransition.ACTIVITY_TRANSITION_EXIT)
                .build());


        transitions.add(new ActivityTransition.Builder()
                .setActivityType(DetectedActivity.STILL)
                .setActivityTransition(ActivityTransition.ACTIVITY_TRANSITION_ENTER)
                .build());

        transitions.add(new ActivityTransition.Builder()
                .setActivityType(DetectedActivity.STILL)
                .setActivityTransition(ActivityTransition.ACTIVITY_TRANSITION_EXIT)
                .build());

        transitions.add(new ActivityTransition.Builder()
                .setActivityType(DetectedActivity.RUNNING)
                .setActivityTransition(ActivityTransition.ACTIVITY_TRANSITION_ENTER)
                .build());


        transitions.add(new ActivityTransition.Builder()
                .setActivityType(DetectedActivity.RUNNING)
                .setActivityTransition(ActivityTransition.ACTIVITY_TRANSITION_EXIT)
                .build());


        transitions.add(new ActivityTransition.Builder()
                .setActivityType(DetectedActivity.IN_VEHICLE)
                .setActivityTransition(ActivityTransition.ACTIVITY_TRANSITION_ENTER)
                .build());

        transitions.add(new ActivityTransition.Builder()
                .setActivityType(DetectedActivity.IN_VEHICLE)
                .setActivityTransition(ActivityTransition.ACTIVITY_TRANSITION_EXIT)
                .build());

        ActivityTransitionRequest activityTransitionRequest
                = new ActivityTransitionRequest(transitions);



        Task<Void> task;
        task = activityRecognitionClient.requestActivityTransitionUpdates(activityTransitionRequest, transitionPendingIntent);


        task.addOnSuccessListener(new OnSuccessListener<Void>() {
            @Override
            public void onSuccess(Void aVoid) {
                Toast.makeText(mContext, "Transition update set up", Toast.LENGTH_LONG).show();
            }
        });

        task.addOnFailureListener(new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception e) {
                Toast.makeText(mContext, "Transition update Failed to set up", Toast.LENGTH_LONG).show();
                e.printStackTrace();
            }
        });
        //startService(intent);
    }


    public void deregisterHandler(View view) {
        Task<Void> task = activityRecognitionClient.removeActivityTransitionUpdates(transitionPendingIntent);
        task.addOnSuccessListener(new OnSuccessListener<Void>() {
            @Override
            public void onSuccess(Void aVoid) {
                transitionPendingIntent.cancel();
                Toast.makeText(mContext, "Remove Activity Transition Successfully", Toast.LENGTH_LONG).show();
            }
        });

        task.addOnFailureListener(new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception e) {
                Toast.makeText(mContext, "Remove Activity Transition Failed", Toast.LENGTH_LONG).show();
                e.printStackTrace();
            }
        });
    }

''''

Intent 服务

''''

 public TransitionIntentService(String name) {
        super(name);
    }

    private int activityBang;
    private int transitionBang;


    @Override
    public void onHandleIntent(Intent intent) {

        Log.i(TAG, "onHandleIntent: GO");
        if (intent != null) {
            if (ActivityTransitionResult.hasResult(intent)) {
                ActivityTransitionResult result = ActivityTransitionResult.extractResult(intent);
                for (ActivityTransitionEvent event : result.getTransitionEvents()) {

                    Toast.makeText(this, event.getTransitionType() + "-" + event.getActivityType(), Toast.LENGTH_LONG).show();
                    //7 for walking and 8 for running
                    Log.i(TAG, "Activity Type " + event.getActivityType());
                    activityBang = event.getActivityType();

                    // 0 for enter, 1 for exit
                    Log.i(TAG, "Transition Type " + event.getTransitionType());
                    transitionBang = event.getTransitionType();

                    try {
                        ActivityWriter();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }
        }
        else {
            Log.d(TAG, "onHandleIntent: Banana");
        }
    }



    private void ActivityWriter() throws IOException {

        String baseDir = getExternalCacheDir().toString();
        String fileName = "SentinelData.csv";
        String filePath = baseDir + File.separator + fileName;
        File f = new File(filePath);
        CSVWriter writer;


       SimpleDateFormat date1 = new SimpleDateFormat("yyyy.MM.dd G");
       SimpleDateFormat time1 = new SimpleDateFormat("HH:mm:ss z");

        String date = date1.format(new Date());
        String time = time1.format(new Date());

        if(f.exists()&&!f.isDirectory())
        {
            FileWriter mFileWriter = new FileWriter(filePath, true);
            writer = new CSVWriter(mFileWriter);
        }
        else
        {
            writer = new CSVWriter(new FileWriter(filePath));
        }

        String[] data = {date, time, String.valueOf(activityBang), String.valueOf(transitionBang)};

        writer.writeNext(data);

        writer.close();
    }

''''

我的 list ''''

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="com.example.a200000"
    tools:ignore="GoogleAppIndexingWarning">

    <uses-permission android:name="com.google.android.gms.permission.ACTIVITY_RECOGNITION" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

    <application
        android:allowBackup="true"
        android:fullBackupContent="@xml/backup_descriptor"
        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=".TransitionIntentService"
            android:exported="false" />
    </application>

</manifest>

''''

我的 Gradle

    apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.example.a200000"
        minSdkVersion 22
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation 'com.google.android.gms:play-services-location:17.0.0'
    implementation 'com.google.code.gson:gson:2.8.5'
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'androidx.appcompat:appcompat:1.1.0'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test:runner:1.2.0'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
    implementation 'com.opencsv:opencsv:4.0'
}

我希望并在应用程序打开时收到转换更新，这些更新存储在应用程序缓存的 csv 文件中。现在我的 OnHandleIntent 甚至没有从任务中运行。

Answer 1

不确定，但可能有帮助:

transitionPendingIntent = PendingIntent.getService(this, 100, intent, PendingIntent.FLAG_UPDATE_CURRENT);
Task task = activityRecognitionClient.requestActivityUpdates(1000, transitionPendingIntent);