Android监听手机是否水平

需求

需要做一个类似作业帮拍照，判断用户是否把手机放平的功能。

使用手机重力感应来实现
Activity实现SensorEventListener方法

   //注册感应器SensorManager sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);Sensor sensor = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);sensorManager.registerListener(this, sensor, sensorManager.SENSOR_DELAY_NORMAL);

重写监听方法

    @Overridepublic void onSensorChanged(SensorEvent event) {if (event.sensor == null) {return;}if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {int x = (int) event.values[0];int y = (int) event.values[1];int z = (int) event.values[2];Log.e("dbj","x = "+ x +",y = " + y + " z = "+ z);if (Math.abs(x) > 1 || Math.abs(y) > 1 || Math.abs(z) != 9){Toast.makeText(this,"请把手机水平拍摄",Toast.LENGTH_SHORT).show();}}}@Overridepublic void onAccuracyChanged(Sensor sensor, int accuracy) {}