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public class SearchActivity extends AppCompatActivity {

    Toolbar toolbar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_search);

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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="@color/blue" />

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<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:compat="http://schemas.android.com/apk/res-auto">
    <item
        android:id="@+id/search"
        android:icon="@drawable/abc_ic_search_api_mtrl_alpha"
        android:title="Search"
        android:visible="true"
        compat:actionViewClass="android.support.v7.widget.SearchView"
        compat:showAsAction="ifRoom|collapseActionView" />

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<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <gradient
        android:startColor="@android:color/transparent"
        android:endColor="#40000000"
        android:angle="90" />
</shape>

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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">
    <android.support.v7.widget.Toolbar
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="?attr/colorPrimary" />
    <View

ckdevrel

To Write a ArrayList<File>:

public static void createCachedFile (Context context, String key, ArrayList<File> fileName) throws IOException {

        String tempFile = null;
        for (File file : fileName) {
            FileOutputStream fos = context.openFileOutput (key, Context.MODE_PRIVATE);
            ObjectOutputStream oos = new ObjectOutputStream (fos);
            oos.writeObject (fileName);
            oos.close ();

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Small Star

mdpi: 16px
hdpi: 24px
xhdpi: 32px
xxhdpi: 48px

Medium Star

mdpi: 24px

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To create a circle dynamically:

public static ShapeDrawable drawCircle (Context context, int width, int height, int color) {

        ShapeDrawable oval = new ShapeDrawable (new OvalShape ());
        oval.setIntrinsicHeight (height);
        oval.setIntrinsicWidth (width);
        oval.getPaint ().setColor (color);
        oval.setPadding (10,10,10,10);
        return oval;

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<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="?attr/actionBarSize"
    android:background="@color/white"
    android:orientation="vertical">

    <LinearLayout

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import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.HashMap;
import java.util.Locale;

import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;
import org.joda.time.Duration;
import org.joda.time.Period;