SystemSetting.java 文件源码

@ReactMethod
public void getAppBrightness(Promise promise) {
    final Activity curActivity = getCurrentActivity();
    if(curActivity == null) {
        return;
    }
    try {
        float result = curActivity.getWindow().getAttributes().screenBrightness;
        if(result < 0){
            int val = Settings.System.getInt(getReactApplicationContext().getContentResolver(), Settings.System.SCREEN_BRIGHTNESS);
            promise.resolve(val * 1.0f / 255);
        }else{
            promise.resolve(result);
        }
    } catch (Exception e) {
        e.printStackTrace();
        promise.reject("-1", "get app's brightness fail", e);
    }
}