O aplicativo não está sendo executado. (Unable to start activity ComponentInfo{com.example.wesley.fragmentos/com.example.wesley.fragmentos.MainActivity}: java.lang.IllegalArgumentException: No view found for id 0x7f07003e (com.example.wesley.fragmentos:id/layoutFrag) for fragment Fragment1{9f29d45 #0 id=0x7f07003e Fragment1)

MainActivity

package com.example.wesley.fragmentos;  import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; import android.support.v7.app.AppCompatActivity; import android.os.Bundle;  public class MainActivity extends android.support.v4.app.FragmentActivity {  @Override protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.activity_main);      if(savedInstanceState == null) {         android.support.v4.app.FragmentManager fm = getSupportFragmentManager();         FragmentTransaction ft = fm.beginTransaction();         Fragment1 frag1 = new Fragment1();         ft.add(R.id.layoutFrag, frag1, "Fragment1");         ft.commit();     }   } } 

Fragment1

package com.example.wesley.fragmentos; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup;    public class Fragment1 extends android.support.v4.app.Fragment{  @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {      View view = inflater.inflate(R.layout.fragment_1, container,false);      return view;   }  } 

Fragment_1.xml

<?xml version="1.0" encoding="utf-8"?> <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/layoutFrag">  <TextView     android:id="@+id/text"     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:gravity="center"     android:text="Hello, World! Eu sou um fragmento."/>  </FrameLayout>