Behavior Awareness : A Journey Through HMS Awareness - Part 2 - Huawei Developers

More articles like this, you can visit HUAWEI Developer Forum and Medium.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Introduction:
Behavior Awareness is being used to obtain user current behaviour or detect the behavior change.
For calling Behavior Awareness capability we have to assign the given permissions in the manifest file.
Code:
<!-- Behavior detection permission (Android 10 or later). This permission is sensitive and needs to be dynamically applied for in the code after being declared. -->
<uses-permission android:name="android.permission.ACTIVITY_RECOGNITION" />
<!-- Behavior detection permission (Android 9). This permission is sensitive and needs to be dynamically applied for in the code after being declared. -->
<uses-permission android:name="com.huawei.hms.permission.ACTIVITY_RECOGNITION" />
Capture API
We can use the Capture API to detect user behaviour such as walking, running,cycling,driving etc.
To get current behavior status of a user, we need to call the getBehavior() method - this will return an instance of the BehaviorResponse class that if successful, will contain information about the current user behavior.
Code:
private void getBehavorInfo() {
Awareness.getCaptureClient(this).getBehavior()
.addOnSuccessListener(new OnSuccessListener<BehaviorResponse>() {
@Override
public void onSuccess(BehaviorResponse behaviorResponse) {
BehaviorStatus behaviorStatus = behaviorResponse.getBehaviorStatus();
DetectedBehavior mostLikelyBehavior = behaviorStatus.getMostLikelyBehavior();
String str1 = "Most likely behavior type is " + mostLikelyBehavior.getType() +
",the confidence is " + mostLikelyBehavior.getConfidence();
behavior_info_capture.setTextColor(getColor(R.color.green));
if(mostLikelyBehavior.getType()==0){
behavior_info_capture.setText("You are in Vehicle");
behavior_image.setImageDrawable(getDrawable(R.drawable.vehicle));
}else if(mostLikelyBehavior.getType()==1){
behavior_info_capture.setText("You are in Bicycle");
behavior_image.setImageDrawable(getDrawable(R.drawable.bicycle));
}else if(mostLikelyBehavior.getType()==2){
behavior_info_capture.setText("You are on Foot");
behavior_image.setImageDrawable(getDrawable(R.drawable.foot));
} else if(mostLikelyBehavior.getType()==3){
behavior_info_capture.setText("You are still now");
behavior_image.setImageDrawable(getDrawable(R.drawable.still));
}else if(mostLikelyBehavior.getType()==4){
behavior_info_capture.setText("Unknown behavior");
}else if(mostLikelyBehavior.getType()==7){
behavior_info_capture.setText("You are Walking");
behavior_image.setImageDrawable(getDrawable(R.drawable.walking));
}else if(mostLikelyBehavior.getType()==8){
behavior_info_capture.setText("You are Running");
behavior_image.setImageDrawable(getDrawable(R.drawable.running));
}
}
})
.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(Exception e) {
Log.e(TAG, "get behavior failed", e);
behavior_info_capture.setTextColor(getColor(R.color.red));
behavior_info_capture.setText("get behavior failed: "+e);
}
});
}
Barrier API
We can use the Barrier API to detect the behavior change such as from walking to running.
Public Methods:
Behavior barriers, including the beginning, ending, and keeping barriers of behaviors. Given three mathods which we use in behavior barrier.
public static AwarenessBarrier beginning(int… behaviorTypes)
When a user is in the behavior status, the barrier status is TRUE and a barrier event is reported. After 5s, the barrier status changes to FALSE.
Code:
AwarenessBarrier awarenessBarrier = BehaviorBarrier.beginning(BehaviorBarrier.BEHAVIOR_WALKING);
public static AwarenessBarrier keeping(int… behaviorTypes)
When a user is in the behavior status , the barrier status is TRUE and a barrier event is reported.
Code:
AwarenessBarrier awarenessBarrier = BehaviorBarrier.keeping(BehaviorBarrier.BEHAVIOR_WALKING);
public static AwarenessBarrier ending(int… behaviorTypes)
When a user stops the behavior, the barrier status is TRUE and a barrier event is reported. After 5s, the barrier status changes to FALSE.
Code:
AwarenessBarrier awarenessBarrier = BehaviorBarrier.ending(BehaviorBarrier.BEHAVIOR_WALKING);
Sample Code
Given an example in which a barrier is triggered by the keeping condition. That is, the barrier will be triggered when a user is in stand still.
Code:
public class BehaviorBarrierActivity extends AppCompatActivity {
private static final String TAG ="BehaviorBarrierActivity" ;
private TextView behavior_info_barrier;
private ImageView behavior_info_barrier_image;
PendingIntent pendingIntent;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.behavior_barrier_activity);
behavior_info_barrier=findViewById(R.id.behavior_info_barrier);
behavior_info_barrier_image=findViewById(R.id.behavior_info_barrier_image);
// define PendingIntent that will be triggered upon a barrier status change.
final String BARRIER_RECEIVER_ACTION = getApplication().getPackageName() + "BEHAVIOR_BARRIER_RECEIVER_ACTION";
Intent intent = new Intent(BARRIER_RECEIVER_ACTION);
pendingIntent = PendingIntent.getBroadcast(this, 1, intent, PendingIntent.FLAG_UPDATE_CURRENT);
BehaviorBarrierReceiver barrierReceiver = new BehaviorBarrierReceiver();
registerReceiver(barrierReceiver, new IntentFilter(BARRIER_RECEIVER_ACTION));
addbarrier(this);
}
private void addbarrier(Context context) {
//define the barrier
AwarenessBarrier keepStillBarrier = BehaviorBarrier.keeping(BehaviorBarrier.BEHAVIOR_STILL);
//define the label for the barrier and add the barrier
String behaviorBarrierLabel = "behavior keeping barrier";
//add the barrier
BarrierUpdateRequest.Builder builder = new BarrierUpdateRequest.Builder();
BarrierUpdateRequest request = builder.addBarrier(behaviorBarrierLabel, keepStillBarrier,pendingIntent).build();
Awareness.getBarrierClient(context).updateBarriers(request)
.addOnSuccessListener(new OnSuccessListener<Void>() {
@Override
public void onSuccess(Void aVoid) {
Toast.makeText(getApplicationContext(), "add barrier success", Toast.LENGTH_SHORT).show();
}
})
.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(Exception e) {
Toast.makeText(getApplicationContext(), "add barrier failed", Toast.LENGTH_SHORT).show();
Log.e(TAG, "add barrier failed", e);
}
});
}
// define the broadcast receiver to listen for the barrier event.
class BehaviorBarrierReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
BarrierStatus barrierStatus = BarrierStatus.extract(intent);
String label = barrierStatus.getBarrierLabel();
switch(barrierStatus.getPresentStatus()) {
case BarrierStatus.TRUE:
Log.i(TAG, label + " status:true");
behavior_info_barrier.setText("You are standing now");
behavior_info_barrier_image.setImageDrawable(getDrawable(R.drawable.still));
break;
case BarrierStatus.FALSE:
Log.i(TAG, label + " status:false");
behavior_info_barrier.setText("Looks like you are not standing");
behavior_info_barrier_image.setImageDrawable(getDrawable(R.drawable.foot));
break;
case BarrierStatus.UNKNOWN:
Log.i(TAG, label + " status:unknown");
break;
}
}
}
}
References:
https://developer.huawei.com/consumer/en/doc/development/HMS-Guides/awareness-behavior-dev