我很遗憾在哪里看到我已经看到有某些方法here,并且看着these old questions他们提到它很难但我想知道从那以后在新版本的android中是否有任何改进.
下面的图片是我希望手机移动方向的一个额外示例.
解决方法
>我们需要听手机传感器
>我们需要检查手机是否处于垂直位置
>我们需要制作一个时间计数器,用于垂直注册手机并计数
>我们需要在屏幕上显示时间
对于第一步,我将向我们的类实现SensorEventListener,这将允许我们使用onSensorChanged方法.
@Override
public void onSensorChanged(SensorEvent event) {
if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
listenToSensors(event);
}
}
private void listenToSensors(SensorEvent event) {
if (isPhoneVertical(event)) {
timeCounter();
if (mStatus) {
mStartTime = getStartTime();
mStatus = false;
}
} else {
if (!mStatus) {
mTotalTime = getDiffTime() + mTotalTime;
mStatus = true;
}
}
}
对于第二步,我构建了一个名为isPhoneVertical的方法来检查我们的手机是否处于垂直方向,它主要是检查y轴.您可以通过更改maxVertical来更改陡度.
她的价值不那么陡,0意味着手机应该几乎100％垂直.对于我的测试,它设置为3.
private boolean isPhoneVertical(SensorEvent event) {
float[] values = event.values;
double y = values[1];
// do not change this value
double yAxisInitValue = 10.0;
double verMargin = yAxisInitValue - maxVertical;
return y >= verMargin;
}
对于第3步,我做了一些方法来检查开始时间和停止时间,并更新一个跟踪时间的全局变量,以秒为单位.
private long getStartTime() {
return System.currentTimeMillis() / 1000;
}
private long getDiffTime() {
return getStartTime() - mStartTime;
}
对于第4步,我已经定期运行RunUnThread来更新屏幕上的时间.
private void timeCounter() {
runOnUiThread(new Runnable() {
@Override
public void run() {
mView1.setText("Phone has been vertical for: " + getDiffTime() + " seconds");
mView2.setText("The total time: " + (mTotalTime + getDiffTime()) + "");
}
});
}
也就是说这个解决方案是为了说明如何达到这个目标,我相信它可以通过不同的方式完成.但我想展示解决方案背后的逻辑.
这里是应用程序的屏幕截图,它计算每次手机垂直的时间和垂直的总时间.
MainActivity.java
public class MainActivity extends Activity implements SensorEventListener {
private SensorManager mSensorManager;
private Sensor mAccelerometer;
private TextView mView1,mView2;
private long mStartTime;
private long mTotalTime;
private boolean mStatus = true;
// less value her less steep,0 means the phone should almost be 100% vertical
// try it out
private double maxVertical = 3.0;
@Override
public void onCreate(Bundle savedInstanceState) {
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mView1 = (TextView) findViewById(R.id.textView1);
mView2 = (TextView) findViewById(R.id.textView2);
mSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
mAccelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
}
@Override
public void onSensorChanged(SensorEvent event) {
if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
listenToSensors(event);
}
}
private void listenToSensors(SensorEvent event) {
if (isPhoneVertical(event)) {
timeCounter();
if (mStatus) {
mStartTime = getStartTime();
mStatus = false;
}
} else {
if (!mStatus) {
mTotalTime = getDiffTime() + mTotalTime;
mStatus = true;
}
}
}
// This method return true only for specific phone orientation
// y axis for vertical orientation
private boolean isPhoneVertical(SensorEvent event) {
float[] values = event.values;
double y = values[1];
// do not change this value
double yAxisInitValue = 10.0;
double verMargin = yAxisInitValue - maxVertical;
return y >= verMargin;
}
private long getStartTime() {
return System.currentTimeMillis() / 1000;
}
private long getDiffTime() {
return getStartTime() - mStartTime;
}
// update steps in user interface
private void timeCounter() {
runOnUiThread(new Runnable() {
@Override
public void run() {
mView1.setText("Phone has been vertical for: " + getDiffTime() + " seconds");
mView2.setText("The total time: " + (mTotalTime + getDiffTime()) + "");
}
});
}
@Override
public void onAccuracyChanged(Sensor sensor,int accuracy) {
}
@Override
protected void onResume() {
super.onResume();
mSensorManager.registerListener(this,mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),SensorManager.SENSOR_DELAY_NORMAL);
}
@Override
protected void onPause() {
super.onPause();
// if you want to collect data while mobile screen off,just disable the
// following line,the app will still collecting sensor data
mSensorManager.unregisterListener(this);
}
}
activity_main.xml中
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.maytham.verticaltravels.MainActivity">
<TextView
android:id="@+id/textView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:textSize="20sp"
android:text="TextView1" />
<TextView
android:id="@+id/textView2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_below="@+id/textView1"
android:layout_marginTop="57dp"
android:textSize="20sp"
android:text="TextView2" />
</RelativeLayout>
我也会留下一些阅读链接.
> https://developer.android.com/reference/android/hardware/SensorManager.html
> http://www.livescience.com/40103-accelerometer-vs-gyroscope.html
> https://physics.stackexchange.com/questions/41653/how-do-i-get-the-total-acceleration-from-3-axes
> https://code.tutsplus.com/tutorials/how-to-recognize-user-activity-with-activity-recognition–cms-25851
> http://www.vogella.com/tutorials/AndroidSensor/article.html
> How to get Android phone orientation matching human orientation?
如果您认为我可能会添加更多可以帮助您解决问题的信息,请告诉我们.目前还不清楚你是否正在寻找行走检测/计数器,如果这是你感兴趣的一些事情,请看下面的答案/链接.
> Activity Recognition Api
> How to detect walking with Android accelerometer
> how to calculate exact foot step count using accelerometer in android?
> Detect Movement Accurately using Accelerometer in Android
和GitHub源代码
> https://github.com/bagilevi/android-pedometer
> https://github.com/tartakynov/robowalk
