android 记步功能实现,Android计步(简单Demo)
18.03.01
附上Demo鏈接，歡迎探討撕咬～ Pedometer
18.02.23
最近接了個(gè)測試各大手機(jī)廠商計(jì)步芯片的活兒，所以簡單弄了個(gè)計(jì)步器的小Demo，搞搞測試。后續(xù)會(huì)把測試的結(jié)果一起發(fā)上來，造福鄉(xiāng)親們:我就是結(jié)果😊😊
基本功能
實(shí)時(shí)顯示從系統(tǒng)StepCounter芯片獲取的步數(shù)。
如果你要做個(gè)精準(zhǔn)的計(jì)步器，只有基本步數(shù)的讀取與顯示是遠(yuǎn)遠(yuǎn)不夠的，還可能會(huì)涉及到：
進(jìn)程保活
應(yīng)用被系統(tǒng)意外殺死會(huì)導(dǎo)致數(shù)據(jù)丟失等情況，進(jìn)程再次起來的時(shí)候需要有數(shù)據(jù)恢復(fù)等操作
ACC與StepCounter模式篩選
畢竟不是所有的手機(jī)都支持StepCounter芯片，在一些古老的手機(jī)上還是需要用ACC計(jì)算步數(shù)。對于兩者都支持設(shè)備，哪種方式更準(zhǔn)確呢，這就需要有個(gè)篩選策略了
高頻數(shù)據(jù)讀寫
在統(tǒng)計(jì)數(shù)據(jù)中你會(huì)看到有的芯片會(huì)在1s內(nèi)回調(diào)60多次數(shù)據(jù)，這個(gè)時(shí)候就要考慮讀寫性能了，回調(diào)一次就寫一次sp顯然不是個(gè)好主意
工程源碼
MainActivity - UI 顯示
public class MainActivity extends AppCompatActivity {
private TextView tvStep;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
}
private void init() {
tvStep = findViewById(R.id.tv_step);
register();
}
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
private void register() {
StepCounterManager.getInstance().addStepCounterObserver(new Observer() {
@Override
public void update(Observable o, Object arg) {
tvStep.setText("芯片實(shí)時(shí)獲取步數(shù): " + (float) arg );
}
});
StepCounterManager.getInstance().register();
}
@Override
protected void onDestroy() {
super.onDestroy();
StepCounterManager.getInstance().clearStepObserver();
StepCounterManager.getInstance().unRegister();
}
}
StepCounterManager - 核心StepCounter芯片注冊回調(diào)類
public class StepCounterManager implements SensorEventListener {
private static final int SENSER_TYPE_C = Sensor.TYPE_STEP_COUNTER;
private static StepCounterManager instance;
private final String TAG = "StepCounterManager";
private SensorManager mSensorManager;
private Sensor mStepCount;
private StepCounterObservable mStepCounterObservable;
private StepCounterManager() {
mSensorManager = (SensorManager) GlobalConfig.getAppContext().getSystemService(Context.SENSOR_SERVICE);
if (mSensorManager == null) {
Log.i(TAG, "StepCounterManager init error");
return;
}
mStepCount = mSensorManager.getDefaultSensor(SENSER_TYPE_C);
mStepCounterObservable = new StepCounterObservable();
}
static StepCounterManager getInstance() {
if (instance == null) {
synchronized (StepCounterManager.class) {
if (instance == null) {
instance = new StepCounterManager();
}
}
}
return instance;
}
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
void register() {
if (mStepCount == null) {
return;
}
String info = "name = "
+ mStepCount.getName() + ", version = " + mStepCount.getVersion() + ", vendor = " + mStepCount.getVendor()
+ ", FifoMaxEventCount = " + mStepCount.getFifoMaxEventCount()
+ ", FifoReservedEventCount = " + mStepCount.getFifoReservedEventCount() + ", MinDelay = "
+ mStepCount.getMinDelay() + ", MaximumRange = " + mStepCount.getMaximumRange()
+ ", Power = " + mStepCount.getPower()
+ ", ReportingMode = " + mStepCount.getReportingMode() + ", Resolution = " + mStepCount.getResolution() + ", MaxDelay = " + mStepCount.getMaxDelay();
Log.i(TAG, "芯片信息 : " + info);
mSensorManager.registerListener(this, mStepCount, SensorManager.SENSOR_DELAY_FASTEST);
}
void unRegister() {
mSensorManager.unregisterListener(this);
}
void addStepCounterObserver(Observer observer) {
mStepCounterObservable.addObserver(observer);
}
void clearStepObserver() {
mStepCounterObservable.deleteObservers();
}
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
public void flush() {
mSensorManager.flush(this);
}
private void setStepCount(float count) {
mStepCounterObservable.sendChange(count);
}
@Override
public void onSensorChanged(SensorEvent event) {
if (event.sensor.getType() != SENSER_TYPE_C) {
return;
}
setStepCount(event.values[0]);
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
}
StepCounterObservable - 可被監(jiān)測的StepCounter數(shù)據(jù)源
public class StepCounterObservable extends Observable {
public void sendChange(float progress) {
setChanged();
notifyObservers(progress);
}
}
activity_main.xml - UI
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
android:id="@+id/tv_step"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
android:textSize="20sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
總結(jié)
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