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在onCreate 得到SensorManger实例
private SensorManager sensorManager = null;sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);onResume()要注册监听器
@Overrideprotected void onResume() {super.onResume();sensorManager.registerListener(this, sensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION), SensorManager.SENSOR_DELAY_GAME);}
onPause()要注销监听器
@Overrideprotected void onPause() {super.onPause();sensorManager.unregisterListener(this);}实现监听返回结果的接口SensorEventListener
public class MainActivity extends Activity implements SensorEventListener {} @Overridepublic void onSensorChanged(SensorEvent event) {if (event.sensor.getType() == Sensor.TYPE_ORIENTATION) {// 获取绕Z轴转过的角度float tmp = event.values[0];Animation rotateAnimation = new RotateAnimation(angle, -tmp, directionTextView.getWidth() >> 1 ,directionTextView.getHeight() >> 1 );rotateAnimation.setDuration(100);rotateAnimation.setFillAfter(true);//动画之后就保持动画结束的位置directionTextView.startAnimation(rotateAnimation);angle =-tmp;}}@Overridepublic void onAccuracyChanged(Sensor sensor, int accuracy) {}
要旋转的图片
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