Android: Get height of status, action, navigation bar (pixels)

height.java

        // status bar height
        int statusBarHeight = 0;
        int resourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
        if (resourceId > 0) {
            statusBarHeight = getResources().getDimensionPixelSize(resourceId);
        }

        // action bar height
        int actionBarHeight = 0;
        final TypedArray styledAttributes = getActivity().getTheme().obtainStyledAttributes(
            new int[] { android.R.attr.actionBarSize }
        );
        actionBarHeight = (int) styledAttributes.getDimension(0, 0);
        styledAttributes.recycle();

        // navigation bar height
        int navigationBarHeight = 0;
        int resourceId = getResources().getIdentifier("navigation_bar_height", "dimen", "android");
        if (resourceId > 0) {
            navigationBarHeight = resources.getDimensionPixelSize(resourceId);
        }

JNI translation for getting status bar height: (tested with a NativeActivity app)

static int AndroidStatusBarShown(int* height = NULL) {
    JNIEnv* jni;
    g_App->activity->vm->AttachCurrentThread(&jni, NULL);
    bool state = false;
    jclass cls = jni->GetObjectClass(g_App->activity->clazz);
    jmethodID getResourcesMID = jni->GetMethodID(cls, "getResources", "()Landroid/content/res/Resources;");
    jobject resources = jni->CallObjectMethod(g_App->activity->clazz, getResourcesMID);
    jclass resources_cls = jni->GetObjectClass(resources);
    jmethodID getIDMID = jni->GetMethodID(resources_cls, "getIdentifier", "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)I");
    jmethodID getDimensionPixelSizeMID = jni->GetMethodID(resources_cls, "getDimensionPixelSize", "(I)I");
    jstring id0 = jni->NewStringUTF("status_bar_height");
    jstring id1 = jni->NewStringUTF("dimen");
    jstring id2 = jni->NewStringUTF("android");
    /*get the resource id for the status bar */
    jint resid = jni->CallIntMethod(resources, getIDMID, id0, id1, id2);
    int pxheight = 0;
    if (resid > 0) {
        pxheight = jni->CallIntMethod(resources, getDimensionPixelSizeMID, resid);
        /*get status bar height*/
    }
    if (height != NULL) {
        *height = pxheight;
    }
    jni->DeleteLocalRef(id0);
    jni->DeleteLocalRef(id1);
    jni->DeleteLocalRef(id2);
    g_App->activity->vm->DetachCurrentThread();
    return pxheight > 0;
}
static int AndroidStatusBarHeight() {
    int out;
    AndroidStatusBarShown(&out);
    return out;
}

How you found these identifiers? Plz if you can share.

You can read the android open source project , it contains the java & xml files of the whole system