DataBinding kullanılarak parça test edilirken sınıf fragmanında hata oluştu

Question

Birisi bana yardımcı olabilir mi? Testimde giriş butonunun StartPage'de görüntülenip görüntülenmediğini kontrol etmek istiyorum. Bugün bu hata ile bir süredir uğraşıyordum ve nasıl çözüleceğini bilmiyorum. Burada ne kaçırdım? Espresso test fails with java.lang.String cannot be cast to com.abc.events.databinding.SponsorDetailBinding

android.view.InflateException: Binary XML file line #6: Error inflating class fragment 
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:770) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:483) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:415) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:366) 
at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:256) 
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:109) 
at io.turbela.turbela.login.view.StartActivity.onCreate(StartActivity.java:16) 
at android.app.Activity.performCreate(Activity.java:6289) 
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119) 
at android.support.test.runner.MonitoringInstrumentation.callActivityOnCreate(MonitoringInstrumentation.java:532) 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2655) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2767) 
at android.app.ActivityThread.access$900(ActivityThread.java:177) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1449) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:145) 
at android.app.ActivityThread.main(ActivityThread.java:5951) 
at java.lang.reflect.Method.invoke(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:372) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1400) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1195) 
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void io.turbela.turbela.databinding.FragmentStartBinding.setViewModel(io.turbela.turbela.login.viewmodel.DispatchViewModel)' on a null object reference 
at io.turbela.turbela.StartActivityFragment.onCreateView(StartActivityFragment.java:34) 
at android.app.Fragment.performCreateView(Fragment.java:2114) 
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:875) 
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1060) 
at android.app.FragmentManagerImpl.addFragment(FragmentManager.java:1162) 
at android.app.FragmentManagerImpl.onCreateView(FragmentManager.java:2131) 
at android.app.Activity.onCreateView(Activity.java:5610) 
at android.support.v4.app.BaseFragmentActivityHoneycomb.onCreateView(BaseFragmentActivityHoneycomb.java:34) 
at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:79) 
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:740) 
... 20 more 

LoginTest.java

@RunWith(AndroidJUnit4.class) 
public class LoginTest { 

@Rule 
public ActivityTestRule<StartActivity> mActivityRule = new ActivityTestRule(StartActivity.class); 

@Test 
public void displayLoginPage() { 
    onView(withId(R.id.login_button)).check(matches(isDisplayed())); 
} 
} 

StartActivity.java

public class StartActivity extends AppCompatActivity { 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_start); 
} 
...onCreateOptionsMenu(... 
...onOptionsItemSelected(... 
} 

activity_start.xml

:

Belki bu sorunun bu soruya bir türlü benzerdir 210

<fragment xmlns:android="http://schemas.android.com/apk/res/android" 
android:id="@+id/fragment" 
class="io.turbela.turbela.StartActivityFragment" 
android:layout_width="match_parent" 
android:layout_height="match_parent"/> 

StartActivityFragment.java

public class StartActivityFragment extends Fragment { 

public StartActivityFragment() { 
} 

public static StartActivityFragment newInstance(){ 
    Bundle args = new Bundle(); 
    args.putString("key", "value"); 
    StartActivityFragment fragment = new StartActivityFragment(); 
    fragment.setArguments(args); 
    return fragment; 
} 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 
    FragmentStartBinding binding = DataBindingUtil.inflate(inflater, R.layout.fragment_start, container, false); 
    binding.setViewModel(new DispatchViewModel()); 
    return binding.getRoot(); 
} 
} 

fragment_start.xml

<layout xmlns:android="http://schemas.android.com/apk/res/android"> 

<data> 
    <variable name="viewModel" type="io.turbela.turbela.login.viewmodel.DispatchViewModel" /> 
</data> 

<RelativeLayout 
    style="@android:style/Theme.Holo" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:paddingBottom="@dimen/activity_vertical_margin" 
    android:paddingLeft="@dimen/activity_horizontal_margin" 
    android:paddingRight="@dimen/activity_horizontal_margin" 
    android:paddingTop="@dimen/activity_vertical_margin"> 

    <Button 
     android:id="@+id/login_button" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_alignParentLeft="true" 
     android:layout_alignParentRight="true" 
     android:layout_alignParentStart="true" 
     android:layout_alignParentEnd="true" 
     android:layout_alignParentTop="true" 
     android:layout_marginTop="128dp" 
     android:onClick="@{viewModel.onClickLogin}" 
     android:text="@string/login" /> 
</RelativeLayout> 
</layout> 

DispatchViewModel.java

public class DispatchViewModel extends BaseObservable{ 


public View.OnClickListener onClickLogin() { 
    //loginWithEmail 
    return v -> Log.d("H", "onClickLogin"); 
} 
} 

build.gradle

apply plugin: 'com.android.application' 
apply plugin: 'me.tatarka.retrolambda' 

android { 
compileSdkVersion 23 
buildToolsVersion "22.0.1" 

defaultConfig { 
    applicationId "io.turbela.turbela" 
    minSdkVersion 15 
    targetSdkVersion 23 
    versionCode 1 
    versionName "1.0" 
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" 
} 

dataBinding{ 
    enabled = true 
} 

packagingOptions { 
    exclude 'LICENSE.txt' 
} 
lintOptions { 
    abortOnError false 
} 

compileOptions { 
    sourceCompatibility JavaVersion.VERSION_1_8 
    targetCompatibility JavaVersion.VERSION_1_8 
} 
buildTypes { 
    release { 
     minifyEnabled false 
     proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 
    } 
} 
} 

dependencies { 
compile fileTree(dir: 'libs', include: ['*.jar']) 
compile 'com.android.support:cardview-v7:23.1.1' 
compile 'com.android.support:appcompat-v7:23.1.1' 
compile 'com.parse:parse-android:1.12.0' 
compile 'com.parse.bolts:bolts-android:1.3.0' 
compile 'com.facebook.android:facebook-android-sdk:4.8.1' 
compile 'com.parse:parsefacebookutils-v4-android:1.10.3@aar' 


androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2.2' 
androidTestCompile 'com.android.support.test:runner:0.5' 

} 

Answer 1

<fragment> etiketi eksik android:name nitelik docs gereğince senin activity_start.xml

mevcuttur, bunu içermelidir.

Yani activity.start.xml bu gibi görünmelidir:

Not

<fragment xmlns:android="http://schemas.android.com/apk/res/android" 
android:id="@+id/fragment" 
android:name="io.turbela.turbela.StartActivityFragment" 
android:layout_width="match_parent" 
android:layout_height="match_parent"/> 

:

class= Kullanmaya çalıştığınız özellik neden `DataBindingUtil anlamaya Need here