Why i can not use Sensor.TYPE_ORIENTATION_VECTOR. Type is not recognised

The problem is, that this sensors should be available:

• int TYPE_ACCELEROMETER
• int TYPE_ALL
• int TYPE_GRAVITY
• int TYPE_GYROSCOPE
• int TYPE_LIGHT
• int *TYPE_LINEAR_ACCELERATION*
• int TYPE_MAGNETIC_FIELD
• int TYPE_ORIENTATION
• int TYPE_PRESSURE
• int TYPE_PROXIMITY
• int TYPE_ROTATION_VECTOR
• int TYPE_TEMPERATURE

Why are these three disabled? They are not recognised..."TYPE_ROTATION_VECTOR cannot be resolved or is not a field"

Only these are recognised:

• int TYPE_ACCELEROMETER
• int TYPE_ALL
• int TYPE_GYROSCOPE
• int TYPE_LIGHT
• int TYPE_MAGNETIC开发者_开发问答_FIELD
• int TYPE_ORIENTATION
• int TYPE_PRESSURE
• int TYPE_PROXIMITY
• int TYPE_TEMPERATURE

code is:

        mRotationVectorSensor = mSensorManager.getDefaultSensor(
                Sensor.TYPE_ROTATION_VECTOR);

Project build target is 2.2, API 8. Why i can not use TYPE_ROTATION_VECTOR and other types?

Tnx for andswer!

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You are trying to access a sensor that is available only from API version 9 (you are using API version 8). http://developer.android.com/reference/android/hardware/Sensor.html#TYPE_ROTATION_VECTOR

Check the "Since API level ..." at the right of each method/field

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in Android 2.2, Gravity and linear Acceleration Vectors are not available... Only for versions 2.3 (GingerBread) and newer...

Greetings Ralf