eclipse - Import android.bluetooth.BluetoothGatt cannot be resolved -

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i use eclipse luna , turns out have bunch of import * cannot resolved errors. 

import android.bluetooth.bluetoothgatt; import android.bluetooth.bluetoothgattcallback; import android.bluetooth.bluetoothgattcharacteristic; import android.bluetooth.bluetoothgattdescriptor; import android.bluetooth.bluetoothgattservice; import android.bluetooth.bluetoothmanager;

i cleaned project, remove , import have same error.

bluetoothgatt , other bluetooth gatt profile apis added in api level 18.

so in project properties -> android - > project build target , select target greater 18.

or edit project.properties like

target=android-20

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