MainActivity.java 文件源码

/**
 * Callback indicating when GATT client has connected/disconnected to/from a remote
 * GATT server.
 *
 * @param gatt     GATT client
 * @param status   Status of the connect or disconnect operation.
 *                 {@link BluetoothGatt#GATT_SUCCESS} if the operation succeeds.
 * @param newState Returns the new connection state. Can be one of
 *                 {@link android.bluetooth.BluetoothProfile#STATE_DISCONNECTED} or
 *                 {@link android.bluetooth.BluetoothProfile#STATE_CONNECTED}
 */
@Override
public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
    super.onConnectionStateChange(gatt, status, newState);

    // boolean indicating whether or not the next step is successful, default is false
    boolean success = false;

    // Start Service discovery if we're now connected
    if (status == BluetoothGatt.GATT_SUCCESS) {
        if (newState == BluetoothProfile.STATE_CONNECTED) {
            success = gatt.discoverServices();
        } // else: not connected, continue
    } // else: not successful

    onStep(gatt, success);
}