조각에서 활동을 부풀 리게하는 오류 : InflateException

Question

조각을 가지고 있으며 조각에있는 단추를 클릭하여 조각을 호스트하는 해당 활동을 엽니 다.

버튼 클릭 후 액티비티가 어떻게 나타나는지 테스트하려고하는데 인플레이션 오류 인 것처럼 보입니다.

HomePollsFragment.Java 여기에

mLatestTestButton.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      Intent latestActivity = new Intent(getActivity().getApplicationContext(), LatestActivity.class); 
      startActivity(latestActivity); 
     } 
    }); 

그리고 버튼 클릭에 열 활동에 대한 코드입니다 :

public class LatestActivity extends AppCompatActivity implements LatestFragment.OnFragmentInteractionListener { 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_latest); 

    // Check that the activity is using the layout version with 
    // the fragment_container FrameLayout 
    if (findViewById(R.id.latest_fragment_container) != null) { 

     // However, if we're being restored from a previous state, 
     // then we don't need to do anything and should return or else 
     // we could end up with overlapping fragments. 
     if (savedInstanceState != null) { 
      return; 
     } 

     // Create a new Fragment to be placed in the activity layout 
     LatestFragment latestFragment = new LatestFragment(); 

     // In case this activity was started with special instructions from an 
     // Intent, pass the Intent's extras to the fragment as arguments 
     latestFragment.setArguments(getIntent().getExtras()); 

     // Add the fragment to the 'fragment_container' FrameLayout 
     getSupportFragmentManager().beginTransaction() 
       .add(R.id.latest_fragment_container, latestFragment).commit(); 
    } 



} 

@Override 
public void onFragmentInteraction(Uri uri) { 

} 
} 

다음은 다음 조각을 볼 수있는 버튼을 포함하는 첫 번째 단편이다

내가받는 오류는 다음과 관련되어 있으며 다음 줄과 관련이있는 것 같습니다.

setContentView(R.layout.activity_latest); 

오류 :

06-27 22:35:47.787 4252-4252/com.sourcey.materialloginexample E/AndroidRuntime: FATAL EXCEPTION: main 
                      java.lang.RuntimeException: Unable to start activity ComponentInfo{com.sourcey.materialloginexample/com.troychuinard.fanpolls.LatestActivity}: android.view.InflateException: Binary XML file line #6: Error inflating class fragment 
                       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211) 
                       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261) 
                       at android.app.ActivityThread.access$600(ActivityThread.java:141) 
                       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256) 
                       at android.os.Handler.dispatchMessage(Handler.java:99) 
                       at android.os.Looper.loop(Looper.java:137) 
                       at android.app.ActivityThread.main(ActivityThread.java:5103) 
                       at java.lang.reflect.Method.invokeNative(Native Method) 
                       at java.lang.reflect.Method.invoke(Method.java:525) 
                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 
                       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 #6: Error inflating class fragment 
                       at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:713) 
                       at android.view.LayoutInflater.rInflate(LayoutInflater.java:755) 
                       at android.view.LayoutInflater.inflate(LayoutInflater.java:492) 
                       at android.view.LayoutInflater.inflate(LayoutInflater.java:397) 
                       at android.view.LayoutInflater.inflate(LayoutInflater.java:353) 
                       at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:280) 
                       at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140) 
                       at com.troychuinard.fanpolls.LatestActivity.onCreate(LatestActivity.java:14) 
                       at android.app.Activity.performCreate(Activity.java:5133) 
                       at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
                       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175) 
                       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)  
                       at android.app.ActivityThread.access$600(ActivityThread.java:141)  
                       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)  
                       at android.os.Handler.dispatchMessage(Handler.java:99)  
                       at android.os.Looper.loop(Looper.java:137)  
                       at android.app.ActivityThread.main(ActivityThread.java:5103)  
                       at java.lang.reflect.Method.invokeNative(Native Method)  
                       at java.lang.reflect.Method.invoke(Method.java:525)  
                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)  
                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)  
                       at dalvik.system.NativeStart.main(Native Method)  
                      Caused by: java.lang.NullPointerException: name == null 
                       at java.lang.VMClassLoader.findLoadedClass(Native Method) 
                       at java.lang.ClassLoader.findLoadedClass(ClassLoader.java:354) 
                       at java.lang.ClassLoader.loadClass(ClassLoader.java:491) 
                       at java.lang.ClassLoader.loadClass(ClassLoader.java:461) 
                       at android.support.v4.app.Fragment.isSupportFragmentClass(Fragment.java:454) 
                       at android.support.v4.app.FragmentManagerImpl.onCreateView(FragmentManager.java:2252) 
                       at android.support.v4.app.FragmentController.onCreateView(FragmentController.java:120) 
                       at android.support.v4.app.FragmentActivity.dispatchFragmentsOnCreateView(FragmentActivity.java:356) 
                       at android.support.v4.app.BaseFragmentActivityHoneycomb.onCreateView(BaseFragmentActivityHoneycomb.java:31) 
                       at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:79) 
                       at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:689) 
                       at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)  
                       at android.view.LayoutInflater.inflate(LayoutInflater.java:492)  
                       at android.view.LayoutInflater.inflate(LayoutInflater.java:397)  
                       at android.view.LayoutInflater.inflate(LayoutInflater.java:353)  
                       at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:280)  
                       at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)  
                       at com.troychuinard.fanpolls.LatestActivity.onCreate(LatestActivity.java:14)  
                       at android.app.Activity.performCreate(Activity.java:5133)  
                       at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)  
                       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)  
                       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)  
                       at android.app.ActivityThread.access$600(ActivityThread.java:141)  
                       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)  
                       at android.os.Handler.dispatchMessage(Handler.java:99)  
                       at android.os.Looper.loop(Looper.java:137)  
                       at android.app.ActivityThread.main(ActivityThread.java:5103)  
                       at java.lang.reflect.Method.invokeNative(Native Method)  
                       at java.lang.reflect.Method.invoke(Method.java:525)  
                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)  
                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)  
                       at dalvik.system.NativeStart.main(Native Method)  

activity_latest.xml

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:orientation="vertical" android:layout_width="match_parent" 
android:layout_height="match_parent"> 

    <fragment 
     android:id="@+id/latest_fragment_container" 
     android:layout_weight="1" 
     android:layout_width="match_parent" 
     android:layout_height="0dp" /> 

Answer 1

오류에는 동급를 지정하는 <fragment> 요소에 더 name 속성이 없음을 말하고있다.

NullPointerException: name == null 

그러나, 그것은 당신이 <fragment> 요소를 원하지 않는, 그래서 Fragment 직접로드 의미처럼 보인다. 대신 Fragment이 동적 인 FragmentTransaction 뒤에 붙는 ViewGroup이 필요합니다. <fragment>을 <FrameLayout>으로 변경하십시오.

Answer 2

activity_latest.xml에 문제가 있기 때문입니다. LatestFragment를 Fragment에 추가하려고했습니다. FrameLayout과 같은 ViewGroup에 단편을 추가 할 수 있습니다. 여기에서 코드를 변경하십시오.

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:orientation="vertical" android:layout_width="match_parent" 
android:layout_height="match_parent"> 

    <FrameLayout 
     android:id="@+id/latest_fragment_container" 
     android:layout_weight="1" 
     android:layout_width="match_parent" 
     android:layout_height="0dp" />