Fragment Activity Display Back Button

Question

I search to know how to display back button in a class which inherit from FragmentActivity,

public class GoogleMapsActivity extends FragmentActivity

I know there is the method onBackPressed() which can be override but i don't know how to display back button

@Override
public void onBackPressed() {
}

I tried this method : https://stackoverflow.com/a/43976262/7079226 but it doesn't work, Thanks for your answers

Answer 1

I have same problem with you. I already use ((AppCompatActivity)getApplicationContext()).setSupportActionBar(toolbar); but always getting force close. Then my solution is create my own toolbar in the layout

<android.support.v7.widget.Toolbar
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="?attr/colorPrimary"
    android:elevation="6dp"
    android:minHeight="?attr/actionBarSize"
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
    app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
    android:layout_alignParentTop="true"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true">


    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <ImageView
            android:id="@+id/overflow_back"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true"
            android:background="?attr/selectableItemBackgroundBorderless"
            android:clickable="true"
            app:srcCompat="?attr/homeAsUpIndicator" />

        <TextView
            android:id="@+id/textToolbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:layout_toEndOf="@+id/overflow_back"
            android:paddingLeft="32dp"
            android:textSize="18sp"
            android:textStyle="bold"
            android:layout_toRightOf="@+id/overflow_back"
            android:text="Toolbar Title"
            android:textColor="@android:color/white" />


</RelativeLayout> </android.support.v7.widget.Toolbar>

overflow_back for backbutton, textToolbar for title. In your activity:

imageBack.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
           onBackPressed();
        }
    });