You Need To Use A Theme.appcompat Theme (or Descendant) With This Activity On Android

I have this in Activity : public class MainActivity extends AppCompatActivity implements FragmentDrawer.FragmentDrawerListener{ private Toolbar mToolbar; private Fragment

Solution 1:

All you need to do is add android:theme="@style/Theme.AppCompat.Light" to your application tag in the AndroidManifest.xml file.

Solution 2:

Change this

<stylename="MyMaterialTheme"parent="MyMaterialTheme.Base"></style><stylename="MyMaterialTheme.Base"parent="Theme.AppCompat.Light.DarkActionBar"><itemname="windowNoTitle">true</item><itemname="windowActionBar">false</item><itemname="colorPrimary">@color/colorPrimary</item><itemname="colorPrimaryDark">@color/colorPrimaryDark</item><itemname="colorAccent">@color/colorAccent</item></style>

to this

<stylename="MyMaterialTheme"parent="Theme.AppCompat.Light.DarkActionBar"><itemname="windowNoTitle">true</item><itemname="windowActionBar">false</item><itemname="colorPrimary">@color/colorPrimary</item><itemname="colorPrimaryDark">@color/colorPrimaryDark</item><itemname="colorAccent">@color/colorAccent</item></style>

Full code :

<resources><stylename="MyMaterialTheme"parent="Theme.AppCompat.Light.DarkActionBar"><itemname="windowNoTitle">true</item><itemname="windowActionBar">false</item><itemname="colorPrimary">@color/colorPrimary</item><itemname="colorPrimaryDark">@color/colorPrimaryDark</item><itemname="colorAccent">@color/colorAccent</item></style></resources>

and then clean the project and rebuild it.

Solution 3:

change these two lines

setSupportActionBar(mToolbar);
getSupportActionBar().setDisplayShowHomeEnabled(true); 

Use these

setActionBar(mToolbar);
getActionBar().setDisplayShowHomeEnabled(true); 

Solution 4:

If I understood correctly, You have already defined a style MyMaterialTheme in values/styles.xml. Does Your most base theme extends one of the Theme.AppCompat.{Light,Dark}.NoActionBar? For example:

<stylename="MyMaterialTheme.Base"parent="Theme.AppCompat.Light.NoActionBar">