android 方向傳感器的使用

public class SimpleOrientationActivity extends Activity {


private static final String DEBUG_TAG = "SimpleOrientationActivity";


OrientationEventListener mOrientationListener;


@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);


mOrientationListener = new OrientationEventListener(this,
SensorManager.SENSOR_DELAY_NORMAL) {


@Override
public void onOrientationChanged(int orientation) {
Log.v(DEBUG_TAG, "Orientation changed");
TextView orientationStatus = (TextView) findViewById(R.id.oStatus);
String resultOrientation = String.format(getResources()
.getString(R.string.orientation_status), orientation);
orientationStatus.setText(resultOrientation);


TextView orientationCommentary = (TextView) findViewById(R.id.oCommentary);
if (orientation == -1) {
orientationCommentary.setText("手機平放");
} else if (orientation < 10 || orientation > 350) {
orientationCommentary.setText("手機頂部向上");
} else if (orientation < 100 && orientation > 80) {
orientationCommentary.setText("手機右邊向上");
} else if (orientation < 190 && orientation > 170) {
orientationCommentary.setText("手機邊邊向上");
} else if (orientation < 280 && orientation > 260) {
orientationCommentary.setText("手機左邊向上");
} else
{
orientationCommentary.setText("");
}
}
};


if (mOrientationListener.canDetectOrientation() == true) {
Log.v(DEBUG_TAG, "Can detect orientation");
mOrientationListener.enable();
} else {
Log.v(DEBUG_TAG, "Cannot detect orientation");
mOrientationListener.disable();
}
}


@Override
protected void onDestroy() {
super.onDestroy();
mOrientationListener.disable();
}


}