Android标题和主页按钮作为单个后退按钮

Question

How to achieve the same result as in standard android messaging application, where the back button is united with the title:

Answer 1

Simply set the button to go back to the previous activity/intent. If this isn't what you wanted, I'm not sure I understood your question properly.

Use Android: Go back to previous activity if that's what you wanted.

Answer 2

<Button
android:id="@+id/back"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="16dp"
android:text="set_your_title"
android:drawableLeft="@android:drawable/back"
android:textSize="24sp"/>

You can set the layout width according to your layout requirements.