任何人都知道Google ActivityRecognitionAPI 的精彩文档或说明?除此之外:https://developers.google.com/android/reference/com/google/android/gms/location/ActivityRecognitionApi
这个文档太弱了,我想更多地了解这个API,以及它是如何工作的! 如果您对此API的工作方式有一些了解,我将非常高兴! =)
谢谢!
答案 0 :(得分:2)
至于它是如何工作的,它是一个封闭的源码谷歌API,因此你无法得到确切的答案,但大多数人说这主要依赖于加速计传感器,虽然有些人还说它使用陀螺仪和其他一些传感器同样。
至于如何使用它,如下所示:
<强> 1。添加Play服务依赖性
在 build.gradle(module:app)中,添加:
compile 'com.google.android.gms:play-services:10.0.1'
<强> 2。添加权限
在您的清单中,添加以下权限:
<uses-permission android:name="com.google.android.gms.permission.ACTIVITY_RECOGNITION" />
第3。在MainCctivity的onCreate中连接API
(确保已将公共GoogleApiClient mApiClient声明为成员变量)
mApiClient = new GoogleApiClient.Builder(this)
.addApi(ActivityRecognition.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
mApiClient.connect();
<强> 2。 onConnected:强>
(将其粘贴在您的MainActivity中)
@Override
public void onConnected(@Nullable Bundle bundle) {
Intent intent = new Intent( this, ActivityRecognizedService.class );
PendingIntent pendingIntent = PendingIntent.getService( this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT );
ActivityRecognition.ActivityRecognitionApi.requestActivityUpdates( mApiClient, 3000, pendingIntent );
}
第3。 ActivityRecognizedService类 创建一个新类ActivityRecognizedService并粘贴以下代码:
public ActivityRecognizedService() {
super("ActivityRecognizedService");
}
public ActivityRecognizedService(String name) {
super(name);
}
@Override
protected void onHandleIntent(Intent intent) {
if (ActivityRecognitionResult.hasResult(intent)) {
ActivityRecognitionResult result = ActivityRecognitionResult.extractResult(intent);
handleDetectedActivities(result.getProbableActivities());
}
}
private void handleDetectedActivities(List<DetectedActivity> probableActivities) {
for (DetectedActivity activity : probableActivities) {
switch (activity.getType()) {
case DetectedActivity.IN_VEHICLE: {
Log.e("ActivityRecogition", "In Vehicle: " + activity.getConfidence());
break;
}
case DetectedActivity.ON_BICYCLE: {
Log.e("ActivityRecogition", "On Bicycle: " + activity.getConfidence());
break;
}
case DetectedActivity.ON_FOOT: {
Log.e("ActivityRecogition", "On Foot: " + activity.getConfidence());
break;
}
case DetectedActivity.RUNNING: {
Log.e("ActivityRecogition", "Running: " + activity.getConfidence());
break;
}
case DetectedActivity.STILL: {
Log.e("ActivityRecogition", "Still: " + activity.getConfidence());
NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
builder.setContentText("Are you walking?");
builder.setSmallIcon(R.mipmap.ic_launcher);
builder.setContentTitle(getString(R.string.app_name));
NotificationManagerCompat.from(this).notify(0, builder.build());
break;
}
case DetectedActivity.TILTING: {
Log.e("ActivityRecogition", "Tilting: " + activity.getConfidence());
break;
}
case DetectedActivity.WALKING: {
Log.e("ActivityRecogition", "Walking: " + activity.getConfidence());
break;
}
case DetectedActivity.UNKNOWN: {
Log.e("ActivityRecogition", "Unknown: " + activity.getConfidence());
break;
}
}
通过onConnected我们调用这个服务,在上面的代码中我们有一个3000毫秒或3秒的回调延迟,我们可以改变它。当检测到行走且置信度大于 75 时,此代码会生成Toast通知。
调用服务后,系统会调用onHandleIntent()
,然后调用handleDetectedActivities()
。
4)断开API 删除回调并断开API。
if (mApiClient.isConnected()) {
Intent intent2 = new Intent(context, ActivityRecognizedService.class);
PendingIntent pendingIntent = PendingIntent.getService(MainActivity.this, 0, intent2, PendingIntent.FLAG_UPDATE_CURRENT);
ActivityRecognition.ActivityRecognitionApi.removeActivityUpdates(mApiClient, pendingIntent);
mApiClient.disconnect();
}