SensorManager判断手机指向方向

public class GetPosition extends Activity {
private TextView TextView01;
private SensorManager mSensorManager;

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.get_position);
TextView01 = (TextView) findViewById(R.id.textView1);
mSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
}

protected void onResume() {
super.onResume();
/* 取得方守性的Sensor，并注册SensorEventListener */
mSensorManager.registerListener(mSensorEventListener,
mSensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION),
SensorManager.SENSOR_DELAY_NORMAL);
}

protected void onPause() {
mSensorManager.unregisterListener(mSensorEventListener);
super.onPause();
}

private final SensorEventListener mSensorEventListener = new SensorEventListener() {

public void onAccuracyChanged(Sensor sensor, int accuracy) {

}

public void onSensorChanged(SensorEvent event) {
/* 判断Sensor的种类 */
if (event.sensor.getType() == Sensor.TYPE_ORIENTATION) {
/* 取得X值资料 */
float x_data = event.values[SensorManager.DATA_X];
if ((x_data > 0 && x_data <= 22.5) || x_data > 337.5) {
TextView01.setText("北方" + String.valueOf(x_data));
} else if (x_data > 22.5 && x_data <= 67.5) {
TextView01.setText("东北方" + String.valueOf(x_data));
} else if (x_data > 67.5 && x_data <= 112.5) {
TextView01.setText("东方" + String.valueOf(x_data));
} else if (x_data > 112.5 && x_data <= 157.5) {
TextView01.setText("东南方" + String.valueOf(x_data));
} else if (x_data > 157.5 && x_data <= 202.5) {
TextView01.setText("南方" + String.valueOf(x_data));
} else if (x_data > 202.5 && x_data <= 247.5) {
TextView01.setText("西南方" + String.valueOf(x_data));
} else if (x_data > 247.5 && x_data <= 292.5) {
TextView01.setText("西方" + String.valueOf(x_data));
} else if (x_data > 292.5 && x_data <= 337.5) {
TextView01.setText("西北方" + String.valueOf(x_data));
}
}
}
};
}

public class GetPosition extends Activity { private TextView TextView01; private SensorManager mSensorManager; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.get_position); TextView01 = (TextView) findViewById(R.id.textView1); mSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE); } protected void onResume() { super.onResume(); /* 取得方守性的Sensor，并注册SensorEventListener */ mSensorManager.registerListener(mSensorEventListener, mSensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION), SensorManager.SENSOR_DELAY_NORMAL); } protected void onPause() { mSensorManager.unregisterListener(mSensorEventListener); super.onPause(); } private final SensorEventListener mSensorEventListener = new SensorEventListener() { public void onAccuracyChanged(Sensor sensor, int accuracy) { } public void onSensorChanged(SensorEvent event) { /* 判断Sensor的种类 */ if (event.sensor.getType() == Sensor.TYPE_ORIENTATION) { /* 取得X值资料 */ float x_data = event.values[SensorManager.DATA_X]; if ((x_data > 0 && x_data <= 22.5) || x_data > 337.5) { TextView01.setText("北方" + String.valueOf(x_data)); } else if (x_data > 22.5 && x_data <= 67.5) { TextView01.setText("东北方" + String.valueOf(x_data)); } else if (x_data > 67.5 && x_data <= 112.5) { TextView01.setText("东方" + String.valueOf(x_data)); } else if (x_data > 112.5 && x_data <= 157.5) { TextView01.setText("东南方" + String.valueOf(x_data)); } else if (x_data > 157.5 && x_data <= 202.5) { TextView01.setText("南方" + String.valueOf(x_data)); } else if (x_data > 202.5 && x_data <= 247.5) { TextView01.setText("西南方" + String.valueOf(x_data)); } else if (x_data > 247.5 && x_data <= 292.5) { TextView01.setText("西方" + String.valueOf(x_data)); } else if (x_data > 292.5 && x_data <= 337.5) { TextView01.setText("西北方" + String.valueOf(x_data)); } } } };}