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我寫了一個簡單的android代碼,它監聽加速度和方向傳感器,並將加速度x,y,z值和天使寫入北部。android傳感器偵聽器之間的間隔
在應用程序中我試圖設置發送傳感器事件onSensorChanged()函數之間有30秒的間隔,但它仍然在更新了幾次每秒。
這是代碼:
package com.example.sensors;
import java.util.List;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.app.Activity;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
public class MainActivity extends Activity implements SensorEventListener{
private SensorManager sensorManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sensorManager = (SensorManager)this.getSystemService(SENSOR_SERVICE);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public void onSensorChanged(SensorEvent event) {
if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) //
{
float x = event.values[0];
float y = event.values[1];
float z = event.values[2];
Log.i("acceleration:", "x, y, z" + " " + x + " " + y + " " + z + " ");
}
else if (event.sensor.getType() == Sensor.TYPE_ORIENTATION) //@deprecated. use TYPE_MAGNETIC_FIELD
{
Log.i("orentation: " , "north:" + event.values[0]);
}
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
@Override
protected void onResume() {
super.onResume();
// register this class as a listener for the accelerometer sensors and orientation
sensorManager.registerListener(this,
sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),//This method get the default sensor for a given type
30000000);//SensorManager.SENSOR_DELAY_NORMAL
sensorManager.registerListener(this,
sensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION),//This method get the default sensor for a given type
30000000);
}
@Override
protected void onPause() {
// unregister listener
super.onPause();
sensorManager.unregisterListener(this);
}
}
看起來你正在做的不錯,但要注意在Android不承諾你什麼。例如,如果其他人對加速度傳感器進行採樣(例如,屏幕旋轉),您將根據「快速請求」 – AsfK 2015-12-17 08:13:09