Button Click inside Fragment to open up new fragment

android, fragment

Solution

Try this:

From below code change id show_fragment to match with your layout XML id..

 @Override
            public void onClick(View v) {
                switch (v.getId()) {
                case R.id.btnSearch:
                    //what to put here
                   FragmentManager fm = getFragmentManager();
                   FragmentTransaction ft = fm.beginTransaction();
                   ft.replace(R.id.show_fragment, new TestFragment(), "fragment_screen");
                    ft.commit();
                 break;
                }
            }   


<FrameLayout
        android:id="@+id/show_fragment"
        android:layout_width="match_parent"
        android:layout_height="0dp">

    </FrameLayout>

Problem

I don't know how to open up a new fragment on button click, I only know how to open new Activity using intent but when I try to open up new fragment my project app crashes hope someone can help me with my problem this is what I have: ``` import android.app.Fragment; import android.os.Bundle; import android.app.FragmentManager; import android.app.FragmentTransaction; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.Spinner; public class FragmentTwo extends Fragment { public FragmentTwo() { } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_layout_two, container, false); // SPINNER1 Spinner spinner1 = (Spinner) view.findViewById(R.id.spinnerSpecialty); ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource( getActivity(), R.array.specialty_arrays, android.R.layout.simple_spinner_item); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); spinner1.setAdapter(adapter); // SPINNER2 Spinner spinner2 = (Spinner) view.findViewById(R.id.spinnerLocation); ArrayAdapter<CharSequence> adapter2 = ArrayAdapter.createFromResource( getActivity(), R.array.city_array, android.R.layout.simple_spinner_item); adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); spinner2.setAdapter(adapter); // BUTTON Button btnSearch = (Button) view.findViewById(R.id.btnSearch); btnSearch.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { switch (v.getId()) { case R.id.btnSearch: //what to put here FragmentManager fm = getFragmentManager(); FragmentTransaction ft = fm.beginTransaction(); ft.replace(R.id.content_frame, new FragmentThree()); ft.commit(); break; } } }); return view; } ``` } LOGCAT: ``` 04-01 03:45:25.508: E/AndroidRuntime(1618): FATAL EXCEPTION: main 04-01 03:45:25.508: E/AndroidRuntime(1618): java.lang.NullPointerException 04-01 03:45:25.508: E/AndroidRuntime(1618): at com.droid.FragmentThree.onCreateView(FragmentThree.java:30) 04-01 03:45:25.508: E/AndroidRuntime(1618): at android.app.Fragment.performCreateView(Fragment.java:1695) 04-01 03:45:25.508: E/AndroidRuntime(1618): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:885) 04-01 03:45:25.508: E/AndroidRuntime(1618): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1057) 04-01 03:45:25.508: E/AndroidRuntime(1618): at android.app.BackStackRecord.run(BackStackRecord.java:682) 04-01 03:45:25.508: E/AndroidRuntime(1618): at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1435) 04-01 03:45:25.508: E/AndroidRuntime(1618): at android.app.FragmentManagerImpl$1.run(FragmentManager.java:441) 04-01 03:45:25.508: E/AndroidRuntime(1618): at android.os.Handler.handleCallback(Handler.java:730) 04-01 03:45:25.508: E/AndroidRuntime(1618): at android.os.Handler.dispatchMessage(Handler.java:92) 04-01 03:45:25.508: E/AndroidRuntime(1618): at android.os.Looper.loop(Looper.java:137) 04-01 03:45:25.508: E/AndroidRuntime(1618): at android.app.ActivityThread.main(ActivityThread.java:5103) 04-01 03:45:25.508: E/AndroidRuntime(1618): at java.lang.reflect.Method.invokeNative(Native Method) 04-01 03:45:25.508: E/AndroidRuntime(1618): at java.lang.reflect.Method.invoke(Method.java:525) 04-01 03:45:25.508: E/AndroidRuntime(1618): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 04-01 03:45:25.508: E/AndroidRuntime(1618): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 04-01 03:45:25.508: E/AndroidRuntime(1618): at dalvik.system.NativeStart.main(Native Method) ```

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