I need schematic of this simple microphone
A battery, 2.2k resistor, microphone element are three components found in an electret microphone. However, the usual voltage source is higher than that provided by a 1.5V battery: 







simulate this circuit &ndash; Schematic created using CircuitLab

Polarity of this microphone element matters: you should identify its grounded connection for proper operation. It appears that the capacitor C1 is not included. In that case, the junction of the microphone element and 2k resistor(R1) would go directly to the jack's tip.
Edit:
Battery positive goes directly to microphone? Then the following circuit would be likely:







simulate this circuit
Where's the switch? Hard to say. Likely in series with the battery, to reduce current (and allow the battery to last longer).