深入探讨 Android 传感器

				
package com.msi.ibm.eyes;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
import android.hardware.SensorManager;
import android.hardware.SensorListener;
public class IBMEyes extends Activity implements SensorListener {
    final String tag = "IBMEyes";
    SensorManager sm = null;
    TextView xViewA = null;
    TextView yViewA = null;
    TextView zViewA = null;
    TextView xViewO = null;
    TextView yViewO = null;
    TextView zViewO = null;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
       // get reference to SensorManager
        sm = (SensorManager) getSystemService(SENSOR_SERVICE);
        setContentView(R.layout.main);
        xViewA = (TextView) findViewById(R.id.xbox);
        yViewA = (TextView) findViewById(R.id.ybox);
        zViewA = (TextView) findViewById(R.id.zbox);
        xViewO = (TextView) findViewById(R.id.xboxo);
        yViewO = (TextView) findViewById(R.id.yboxo);
        zViewO = (TextView) findViewById(R.id.zboxo);
    }
    public void onSensorChanged(int sensor, float[] values) {
        synchronized (this) {
            Log.d(tag, "onSensorChanged: " + sensor + ", x: " + 
values[0] + ", y: " + values[1] + ", z: " + values[2]);
            if (sensor == SensorManager.SENSOR_ORIENTATION) {
                xViewO.setText("Orientation X: " + values[0]);
                yViewO.setText("Orientation Y: " + values[1]);
                zViewO.setText("Orientation Z: " + values[2]);
            }
            if (sensor == SensorManager.SENSOR_ACCELEROMETER) {
                xViewA.setText("Accel X: " + values[0]);
                yViewA.setText("Accel Y: " + values[1]);
                zViewA.setText("Accel Z: " + values[2]);
            }            
        }
    }
    
    public void onAccuracyChanged(int sensor, int accuracy) {
    	Log.d(tag,"onAccuracyChanged: " + sensor + ", accuracy: " + accuracy);
    }
    @Override
    protected void onResume() {
        super.onResume();
      // register this class as a listener for the orientation and accelerometer sensors
        sm.registerListener(this, 
                SensorManager.SENSOR_ORIENTATION |SensorManager.SENSOR_ACCELEROMETER,
                SensorManager.SENSOR_DELAY_NORMAL);
    }
    
    @Override
    protected void onStop() {
        // unregister listener
        sm.unregisterListener(this);
        super.onStop();
    }    
}

				
MediaRecorder mrec ;
File audiofile = null;
private static final String TAG="SoundRecordingDemo";
protected void startRecording() throws IOException 
{
   mrec.setAudioSource(MediaRecorder.AudioSource.MIC);
   mrec.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
   mrec.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
   if (mSampleFile == null) 
   {
       File sampleDir = Environment.getExternalStorageDirectory();
       try 
       { 
          audiofile = File.createTempFile("ibm", ".3gp", sampleDir);
       }
       catch (IOException e) 
       {
           Log.e(TAG,"sdcard access error");
           return;
       }
   }
   mrec.setOutputFile(audiofile.getAbsolutePath());
   mrec.prepare();
   mrec.start();
}
protected void stopRecording() 
{
   mrec.stop();
   mrec.release();
   processaudiofile(audiofile.getAbsolutePath());
}
protected void processaudiofile() 
{
   ContentValues values = new ContentValues(3);
   long current = System.currentTimeMillis();
   values.put(MediaStore.Audio.Media.TITLE, "audio" + audiofile.getName());
   values.put(MediaStore.Audio.Media.DATE_ADDED, (int) (current / 1000));
   values.put(MediaStore.Audio.Media.MIME_TYPE, "audio/3gpp");
   values.put(MediaStore.Audio.Media.DATA, audiofile.getAbsolutePath());
   ContentResolver contentResolver = getContentResolver();
   
   Uri base = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
   Uri newUri = contentResolver.insert(base, values);
   
   sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, newUri));
}

<uses-permission android:name="android.permission.RECORD_AUDIO"></uses-permission>