针对 Android Wear 应用程序的 Bluemix IoT 实时仪表板-2
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- UID
- 1066743
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针对 Android Wear 应用程序的 Bluemix IoT 实时仪表板-2
显示进行活动时的心率打开“HeartRateWearActivity”文件，添加此属性：
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| private HeartRateBroadcastReceiver heartRateBroadcastReceiver;
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添加此内部类：
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| private class HeartRateBroadcastReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context arg0, Intent arg1) {
// ahr
Log.v(this.getClass().getName(), "Value Recieved");
if (arg1.getAction().equals("heartRateAction")) {
float hr = arg1.getFloatExtra("HeartRate", 0);
if (HeartRateWearActivity.this.mTextView != null) {
HeartRateWearActivity.this.mTextView.setText("Heart Rate : " + hr);
}
}
}
}
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添加以下方法：
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| @Override
protected void onStart() {
// initialize the broadcast recieiver
heartRateBroadcastReceiver = new HeartRateBroadcastReceiver();
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction("heartRateAction");
registerReceiver(heartRateBroadcastReceiver, intentFilter);
// start HeartRateWearService
startService(new Intent(this, HeartRateWearService.class));
super.onStart();
}
@Override
protected void onStop() {
unregisterReceiver(heartRateBroadcastReceiver);
stopService(new Intent(this, HeartRateWearService.class));
super.onStop();
}
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将心率发送给移动应用程序更新 Wear 应用程序以发送心率打开“HeartRateWearService”，添加属性：
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| private GoogleApiClient googleApiClient;
private ExecutorService executorService;
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在“onCreate”函数中初始化 executorService：
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| @Override
public void onCreate() {
…
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executorService = Executors.newCachedThreadPool();
}
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添加以下函数：
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| private boolean isConnected() {
if (googleApiClient == null)
googleApiClient = new GoogleApiClient.Builder(this.getApplication().getApplicationContext()).addApi(Wearable.API).build();
if (googleApiClient.isConnected()) {
return true;
}
ConnectionResult result = googleApiClient.blockingConnect(15000, TimeUnit.MILLISECONDS);
return result.isSuccess();
}
private void sendToMobile(final SensorEvent event) {
executorService.submit(new Runnable() {
@Override
public void run() {
PutDataMapRequest dataMap = PutDataMapRequest.create("/sensor/heartRate");
dataMap.getDataMap().putLong("timestamp", event.timestamp);
dataMap.getDataMap().putFloat("value", event.values[0]);
PutDataRequest putDataRequest = dataMap.asPutDataRequest();
if (isConnected()) {
Wearable.DataApi.putDataItem(googleApiClient, putDataRequest).setResultCallback(new ResultCallback<DataApi.DataItemResult>() {
@Override
public void onResult(DataApi.DataItemResult dataItemResult) {
Log.v(this.getClass().getName(), "Sending heartRate: " + dataItemResult.getStatus().isSuccess());
}
});
}
}
});
}
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在“onSensorChanged”函数中添加此指令：
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| @Override
public void onSensorChanged(SensorEvent event) {
…
…
sendToMobile(event);
}
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更新移动活动在“mobile”string.xml 文件中添加一个标签：
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| <string name="heartRateText">Heart Rate : N/A</string>
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打开移动布局“activity_heart_rate_mobile.xml”，然后使用“heartRateTextView”更改“id”字段，并使用“@string/heartRateText”更改“text”字段。
创建一个新的移动服务在移动模块中创建一个新服务“HeartRateMobileWearableListenerService”。
更新移动清单：
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| <service android:name=".HeartRateMobileWearableListenerService" >
<intent-filter>
<action android:name="com.google.android.gms.wearable.BIND_LISTENER"/>
</intent-filter>
</service>
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更改“HeartRateMobileWearableListenerService”代码：
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| public class HeartRateMobileWearableListenerService extends WearableListenerService {
@Override
public void onDataChanged(DataEventBuffer dataEvents) {
Log.d(this.getClass().getName(), "onDataChanged()");
for (DataEvent dataEvent : dataEvents) {
if (dataEvent.getType() == DataEvent.TYPE_CHANGED) {
DataItem dataItem = dataEvent.getDataItem();
Uri uri = dataItem.getUri();
String path = uri.getPath();
if (path.equals("/sensor/heartRate")) {
DataMap map = DataMapItem.fromDataItem(dataItem).getDataMap();
long timestamp = map.getLong("timestamp");
float value = map.getFloat("value");
Intent intent = new Intent();
intent.setAction("heartRateAction");
intent.putExtra("HeartRate", value);
sendBroadcast(intent);
}
}
}
}
}
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显示进行移动活动时的心率打开“HeartRateMobileActivity”，添加此属性：
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| private HeartRateBroadcastReceiver heartRateBroadcastReceiver;
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添加此内部类：
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| private class HeartRateBroadcastReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context arg0, Intent arg1) {
// ahr
Log.v(this.getClass().getName(), "Value Recieved");
if (arg1.getAction().equals("heartRateAction")) {
float hr = arg1.getFloatExtra("HeartRate", 0);
((TextView)HeartRateMobileActivity.this.findViewById(R.id.heartRateTextView)).setText("Heart Rate : " + hr);
}
}
}
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添加“onStart”函数：
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| @Override
protected void onStart() {
super.onStart();
// ahr
heartRateBroadcastReceiver = new HeartRateBroadcastReceiver();
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction("heartRateAction");
registerReceiver(heartRateBroadcastReceiver, intentFilter);
}
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