我正试图从我的Android手机上获取传感器的倾斜角度,滚动角度,但到目前为止没有成功,
当我点击我应该给我3个角度的按钮时,我得到“结果:0.0 -0.0 -0.0”
package com.example;
import android.app.Activity;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Button;
import android.view.View;
public class MyActivity extends Activity
{
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final float[] mValuesMagnet = new float[3];
final float[] mValuesAccel = new float[3];
final float[] mValuesOrientation = new float[3];
final float[] mRotationMatrix = new float[9];
final Button btn_valider = (Button) findViewById(R.id.btn1);
final TextView txt1 = (TextView) findViewById(R.id.textView1);
final SensorEventListener mEventListener = new SensorEventListener() {
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
public void onSensorChanged(SensorEvent event) {
// Handle the events for which we registered
switch (event.sensor.getType()) {
case Sensor.TYPE_ACCELEROMETER:
System.arraycopy(event.values, 0, mValuesAccel, 0, 3);
break;
case Sensor.TYPE_MAGNETIC_FIELD:
System.arraycopy(event.values, 0, mValuesMagnet, 0, 3);
break;
}
};
};
btn_valider.setOnClickListener(new View.OnClickListener()
{
public void onClick(View view)
{
SensorManager.getRotationMatrix(mRotationMatrix, null, mValuesAccel, mValuesMagnet);
SensorManager.getOrientation(mRotationMatrix, mValuesOrientation);
final CharSequence test;
test = "results: " + mValuesOrientation[0] +" "+mValuesOrientation[1]+ " "+ mValuesOrientation[2];
txt1.setText(test);
}
});
}
}
答案 0 :(得分:17)
你几乎使用代码Mike,但为了使事件监听器能够为任何传感器检索数据,必须使用以下命令向SensorManager类注册事件监听器和传感器:
SensorManager _sensorManager;
_sensorManager.registerListener(mEventListener, _sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
SensorManager.SENSOR_DELAY_NORMAL);
以下是您的代码,用于显示我认为您想要查看的数据。
import android.app.Activity;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Button;
import android.view.View;
public class StackOverflowTestingGroundActivity extends Activity
{
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
SensorManager sensorManager = (SensorManager) this.getSystemService(SENSOR_SERVICE);
final float[] mValuesMagnet = new float[3];
final float[] mValuesAccel = new float[3];
final float[] mValuesOrientation = new float[3];
final float[] mRotationMatrix = new float[9];
final Button btn_valider = (Button) findViewById(R.id.btn1);
final TextView txt1 = (TextView) findViewById(R.id.textView1);
final SensorEventListener mEventListener = new SensorEventListener() {
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
public void onSensorChanged(SensorEvent event) {
// Handle the events for which we registered
switch (event.sensor.getType()) {
case Sensor.TYPE_ACCELEROMETER:
System.arraycopy(event.values, 0, mValuesAccel, 0, 3);
break;
case Sensor.TYPE_MAGNETIC_FIELD:
System.arraycopy(event.values, 0, mValuesMagnet, 0, 3);
break;
}
};
};
// You have set the event lisetner up, now just need to register this with the
// sensor manager along with the sensor wanted.
setListners(sensorManager, mEventListener);
btn_valider.setOnClickListener(new View.OnClickListener()
{
public void onClick(View view)
{
SensorManager.getRotationMatrix(mRotationMatrix, null, mValuesAccel, mValuesMagnet);
SensorManager.getOrientation(mRotationMatrix, mValuesOrientation);
final CharSequence test;
test = "results: " + mValuesOrientation[0] +" "+mValuesOrientation[1]+ " "+ mValuesOrientation[2];
txt1.setText(test);
}
});
}
// Register the event listener and sensor type.
public void setListners(SensorManager sensorManager, SensorEventListener mEventListener)
{
sensorManager.registerListener(mEventListener, sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
SensorManager.SENSOR_DELAY_NORMAL);
sensorManager.registerListener(mEventListener, sensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD),
SensorManager.SENSOR_DELAY_NORMAL);
}
}