dynoChris

//source: https://developer.android.com/training/system-ui/status

View decorView = getWindow().getDecorView();
// Hide the status bar.
int uiOptions = View.SYSTEM_UI_FLAG_FULLSCREEN;
decorView.setSystemUiVisibility(uiOptions);

dynoChris

//link: http://developer.alexanderklimov.ru/android/theory/scales.php
//
//examples
//**********************
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

dynoChris

//link: https://stackoverflow.com/questions/9884202/custom-circle-button

//place to the drawable folder as ripple_effect.xml

<?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
    android:color="@android:color/holo_green_light">
    <item>
        <shape android:shape="rectangle">
            <corners android:radius="200dp"/>

dynoChris

String text = "some text";
shareText(text);

private void shareText(String text) {
    Intent shareIntent = new Intent(Intent.ACTION_SEND);
    shareIntent.setType("text/plain");
    shareIntent.putExtra(Intent.EXTRA_TEXT, text);
    startActivity(Intent.createChooser(shareIntent, "Share text"));
}

dynoChris

public class StatusBarUtils {

    public static void makeTransparentStatusBar(Activity activity) {
        if (Build.VERSION.SDK_INT >= 19 && Build.VERSION.SDK_INT < 21) {
            setWindowFlag(activity, true);
        }
        if (Build.VERSION.SDK_INT >= 19) {
            activity.getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
        }
        //make fully Android Transparent Status bar

dynoChris

//Many thanks to this author https://github.com/chroaster/MSLPBug
//I use adnroidx, but you can use any support libraries
//Notice, it issue use deprecated methods, but I don't see problem with performence of app.
//**********************

package com.example.mslpfixdemo;

import android.annotation.TargetApi;
import android.app.AlertDialog;
import android.content.Context;

dynoChris

<!--just add one parameter — checkable="true"-->
<!--'checked' highlight some item in default-->
<item
    android:id="@+id/some_item"
    android:checkable="true"
    android:checked="true"
    android:icon="@drawable/ic_icon"
    android:title="@string/string" />

dynoChris

Dialog dialog = new Dialog(this);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setCancelable(false);
dialog.setContentView(R.layout.progress_layout);

dialog.show();

dynoChris

public static void setMargins (View view, int left, int top, int right, int bottom) {
        if (view.getLayoutParams() instanceof ViewGroup.MarginLayoutParams) {
            ViewGroup.MarginLayoutParams p = (ViewGroup.MarginLayoutParams) view.getLayoutParams();
            p.setMargins(left, top, right, bottom);
            view.requestLayout();
        }
}
//How to call it — Utils.setMargin(imageView, 0, 20, 0, 0);

dynoChris

AppBarLayout.LayoutParams params = (AppBarLayout.LayoutParams) collapsToolbar.getLayoutParams();
params.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL | AppBarLayout.LayoutParams.SCROLL_FLAG_EXIT_UNTIL_COLLAPSED);
collapsToolbar.setLayoutParams(params);

//clear scroll flags — params.setScrollFlags(0);