Toolbar problemi

alttaki haliyle 

setSupportActionBar(toolbar);
komutu kırmızı oluyor.

public class Mufredat extends AppCompatActivity{
şeklinde extend ettiğimde düzeliyor

kırmızı renk kalkıyor

ama programı çalıştırdığımda program kilitleniyor

muhtemelen setSupportActionBar(toolbar); komutu AppCompatActivity de çalışıyor

Activity olduğunda çalışmıyor.

Bu komutun Activity de çalışan muadilini bulmam gerekiyor.

YArdım ederseniz sevinirim.

Teşekkürler

public class Mufredat extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.mufredat);
//TOOLBAR
        Toolbar toolbar = (Toolbar) findViewById(R.id.tool_bar);
        toolbar.setTitleTextColor(getResources().getColor(R.color.white));
        setSupportActionBar(toolbar);
//TOOLBAR

kilitlendiğinde verilen hata aşağıda

01-13 09:31:25.315 7503-7503/net.netmatematik.matematik E/AndroidRuntime: FATAL EXCEPTION: main
                                                                          java.lang.RuntimeException: Unable to start activity ComponentInfo{net.netmatematik.matematik/net.netmatematik.matematik.Mufredat}: android.view.InflateException: Binary XML file line #28: Error inflating class TextView
                                                                              at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
                                                                              at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
                                                                              at android.app.ActivityThread.access$600(ActivityThread.java:130)
                                                                              at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
                                                                              at android.os.Handler.dispatchMessage(Handler.java:99)
                                                                              at android.os.Looper.loop(Looper.java:137)
                                                                              at android.app.ActivityThread.main(ActivityThread.java:4745)
                                                                              at java.lang.reflect.Method.invokeNative(Native Method)
                                                                              at java.lang.reflect.Method.invoke(Method.java:511)
                                                                              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
                                                                              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
                                                                              at dalvik.system.NativeStart.main(Native Method)
                                                                           Caused by: android.view.InflateException: Binary XML file line #28: Error inflating class TextView
                                                                              at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
                                                                              at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
                                                                              at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
                                                                              at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
                                                                              at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
                                                                              at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:284)
                                                                              at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
                                                                              at net.netmatematik.matematik.Mufredat.onCreate(Mufredat.java:22)