HelperUtils.java

//more on:
//    http://www.androidcodesnippets.com
//    http://www.androidsnippets.com
//    https://github.com/changer/android-utils/blob/master/Utils/app/src/main/java/nl/changer/android/opensource/Utils.java

static void TintDrawable(Context c, int drawable, int color){
        //example:       HelperUtils.TintDrawable(this, R.drawable.logo,R.color.colorPrimaryDark);
        Drawable mDrawable = null;
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
            mDrawable = c.getResources().getDrawable(R.drawable.x, null);
        }else{
            mDrawable = c.getResources().getDrawable(R.drawable.x);
        }
       
        mDrawable.setColorFilter(ContextCompat.getColor(c, R.color.colorPrimaryDark), PorterDuff.Mode.SRC_ATOP);
    }

public static void TintDrawable(Context c, ImageView iv, int color){
        Drawable mDrawable = iv.getDrawable();
        mDrawable.setColorFilter(ContextCompat.getColor(c,color), PorterDuff.Mode.SRC_ATOP);
}

    static Intent buildIntentWithAction(Context context, Class clazz, String action) {
        Intent intent = new Intent(context, clazz);
        intent.setAction(action);
        return intent;
    }
    
    static void SetTextWintSp(TextView tv, int dimension){
        //dimension = R.dimen.ts_med_regular
        tv.setTextSize(TypedValue.COMPLEX_UNIT_PX, getActivity().getResources().getDimensionPixelSize(dimension));
    }

    static void MakeActivitiesTransitions(Activity a) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            Transition transition = new Explode();
            Transition transition_ = new Fade();
            a.getWindow().requestFeature(Window.FEATURE_CONTENT_TRANSITIONS);
            a.getWindow().setEnterTransition(transition);
            a.getWindow().setExitTransition(transition);
            a.getWindow().setSharedElementEnterTransition(transition_);
            a.getWindow().setSharedElementExitTransition(transition_);

        }
    }

    static void ShowStatusBar(AppCompatActivity a) {

        //show status bar
/*        View decorView = a.getWindow().getDecorView();
        int uiOptions = View.SYSTEM_UI_FLAG_VISIBLE;
        decorView.setSystemUiVisibility(uiOptions);*/

        //change color of statusbar
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            Window window = a.getWindow();
            window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
            window.setStatusBarColor(a.getResources().getColor(R.color.colorPrimaryDark, null));
        }

        //show action bar
/*        ActionBar actionBar = a.getSupportActionBar();
        actionBar.show();*/

        a.getWindow().getDecorView().setSystemUiVisibility(
                View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
                      /*  | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                        | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);*/

    }

    static void HideStatusBar(AppCompatActivity a) {

        //hide status bar
/*        View decorView = a.getWindow().getDecorView();
        int uiOptions = View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN;
       // int uiOptions = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN;
        decorView.setSystemUiVisibility(uiOptions);*/

        //change color of statusbar
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            Window window = a.getWindow();
            window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
            window.setStatusBarColor(Color.BLACK);
        }

        //hide action bar
            /*ActionBar actionBar = a.getWindow().getSupportActionBar();
            actionBar.hide();*/

        a.getWindow().getDecorView().setSystemUiVisibility(
                View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                        | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                        | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                        | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION // hide nav bar
                        | View.SYSTEM_UI_FLAG_FULLSCREEN // hide status bar
                        | View.SYSTEM_UI_FLAG_IMMERSIVE);

    }


    public static void saveObjectInSharedPref(Context c, News not, String tag, int total) {
        try {
            SharedPreferences appSharedPrefs = PreferenceManager.getDefaultSharedPreferences(c);
            SharedPreferences.Editor prefsEditor = appSharedPrefs.edit();
            Gson gson = new Gson();
            String json = gson.toJson(not);
            prefsEditor.putInt("total", total);
            prefsEditor.putString(tag, json);
            prefsEditor.apply();
        } catch (Exception e) {
            Log.d("CacheDatePepeError:", "saveObjectInFileCache: " + e.getMessage());
        }
    }

    public static ArrayList<News> getObjectInSharedPref(Context c, String tag) {
        ArrayList<News> notic = new ArrayList<>();
        try {
            SharedPreferences appSharedPrefs = PreferenceManager.getDefaultSharedPreferences(c);
            Gson gson = new Gson();
            int total = appSharedPrefs.getInt("total", 0);
            if (total > 0) {
                for (int i = 0; i < total; i++) {
                    String json = appSharedPrefs.getString(tag + i, "");
                    News n = gson.fromJson(json, News.class);
                    notic.add(n);
                }
            }
        } catch (JsonSyntaxException e) {
            e.printStackTrace();
        }
        return notic;
    }

 public static float pxToDp(float px) {
        float densityDpi = Resources.getSystem().getDisplayMetrics().densityDpi;
        return px / (densityDpi / 160f);
    }

    public static int dpToPx(int dp) {
        float density = Resources.getSystem().getDisplayMetrics().density;
        return Math.round(dp * density);
    }

    public static void hideKeyboard(Activity activity) {
        InputMethodManager imm =
                (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
        imm.hideSoftInputFromWindow(activity.getWindow().getDecorView().getWindowToken(), 0);
    }

    public static boolean isNetworkConnected(Context context) {
        ConnectivityManager cm =
                (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
        return activeNetwork != null && activeNetwork.isConnectedOrConnecting();
    }

     static void TranslucideSystemDef(AppCompatActivity a) {
             //colocar este metodo antes da "setContentView(R.layout.activity_main);" na Activity
        a.getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION);
        a.getWindow().addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
        a.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
        a.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
        if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.M) {
            a.getWindow().setStatusBarColor(a.getResources().getColor(R.color.black_overlay));
            a.getWindow().setNavigationBarColor(a.getResources().getColor(R.color.black_overlay));
        } else {
            a.getWindow().setStatusBarColor(a.getResources().getColor(R.color.black_overlay, a.getTheme()));
            a.getWindow().setNavigationBarColor(a.getResources().getColor(R.color.black_overlay, a.getTheme()));
        }
        //res/color
             <color name="black_overlay">#AA000000</color>
         
        //res/styles
             <style name="MyFullscreenTheme" parent="Theme.AppCompat.Light.NoActionBar">
                   <item name="android:windowTranslucentStatus">true</item>
                   <item name="android:windowTranslucentNavigation">true</item>
             </style>          

    }