find display modeId that matches currentMode resolution and desired refreshRate

findModeId.java

if (Build.VERSION.SDK_INT >= 23) {
    Display.Mode[] supportedModes = d.getSupportedModes();
    Display.Mode currentMode = d.getMode();
    // calculate wantedFps
    float wantedFps = (float) ((double) video.fpsRate / (double) video.fpsScale);
    int wantedModeId = 0;
    // find corresponding wantedModeId for wantedFps
    for (int i = 0; i < supportedModes.length; i++) {
        if (supportedModes[i].matches(currentMode.getPhysicalWidth(), currentMode.getPhysicalHeight(), wantedFps)) {
            wantedModeId = supportedModes[i].getModeId();
        }
    }
    if (wantedModeId != 0) {
        lp.preferredDisplayModeId = wantedModeId;
        mWindow.setAttributes(lp);
    }
}