How to activate "Share" button in android app?

Question

i want to add "Share" button to my android app.

Like that

I added "Share" button, but button is not active. I click, but nothing happens.

My code in MainActivity.java:

private ShareActionProvider mShareActionProvider;

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.share_menu, menu);
    getMenuInflater().inflate(R.menu.main, menu);
    MenuItem item = menu.findItem(R.id.share_menu);
    mShareActionProvider = (ShareActionProvider) menu.findItem(R.id.share_menu).getActionProvider();
    mShareActionProvider.setShareIntent(getDefaultShareIntent());

    return true;
}

{
    Intent sharingIntent = new Intent(Intent.ACTION_SEND);
    sharingIntent.setType("text/plain");
    sharingIntent.putExtra(android.content.Intent.EXTRA_TEXT, "Text");
    sharingIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "Subject");
    startActivity(Intent.createChooser(sharingIntent, "Share using"));
}

I want to share text in my first tab (first_tab.xml) or second tab (second_tab.xml).

Code in tab (xml) (If need):

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/background_color"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity$DummySectionFragment" >

<TextView
    android:id="@+id/section_label1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:layout_centerVertical="true"
    android:text="@string/text"
    android:textColor="@color/text_color" />

<ImageView
    android:id="@+id/imageView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_centerHorizontal="true"
    android:src="@drawable/sprite" />

Answer 1

Add a Button and on click of the Button add this code:

Intent sharingIntent = new Intent(android.content.Intent.ACTION_SEND); 
sharingIntent.setType("text/plain");
String shareBody = "Here is the share content body";
sharingIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "Subject Here");
sharingIntent.putExtra(android.content.Intent.EXTRA_TEXT, shareBody);
startActivity(Intent.createChooser(sharingIntent, "Share via"));

Useful links:

For basic sharing

For customization