wie zoombaren Bild hinzufügen

Question

Derzeit i ein Fragment ist die Umsetzung um ein Bild anzuzeigen, aber ich versuchte https://github.com/chrisbanes/PhotoView verwenden und es zum Absturz

Hier ist der Code:

public class StorelayoutFragment extends Fragment { 
ImageView mImageView; 
PhotoViewAttacher mAttacher; 

public StorelayoutFragment() { 
    // Required empty public constructor 
} 


@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 
    // Inflate the layout for this fragment 
    View view=inflater.inflate(R.layout.fragment_store_layout, container, false); 


    // Any implementation of ImageView can be used! 
    mImageView = (ImageView) view.findViewById(R.id.imageView); 

    // Set the Drawable displayed 
    Drawable bitmap = getResources().getDrawable(R.drawable.small_layout); 
    mImageView.setImageDrawable(bitmap); 

    // Attach a PhotoViewAttacher, which takes care of all of the zooming functionality. 
    // (not needed unless you are going to change the drawable later) 
    mAttacher = new PhotoViewAttacher(mImageView); 
return view; 
}} 

Fehler, die ich erhalte, ist:

E/AndroidRuntime: FATAL EXCEPTION: main 
       Process: com.sp.ez_mart_z, PID: 18272 
       java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ImageView.setImageDrawable(android.graphics.drawable.Drawable)' on a null object reference 
        at com.sp.ez_mart_z.StorelayoutFragment.onCreateView(StorelayoutFragment.java:42) 
        at android.support.v4.app.Fragment.performCreateView(Fragment.java:2087) 
        at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1113) 
        at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1295) 
        at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:801) 
        at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1682) 
        at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:541) 
        at android.os.Handler.handleCallback(Handler.java:751) 
        at android.os.Handler.dispatchMessage(Handler.java:95) 
        at android.os.Looper.loop(Looper.java:154) 
        at android.app.ActivityThread.main(ActivityThread.java:6247) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:872) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:762) 

Irgendwelche Vorschläge?

Answer 1

Das Problem scheint zu sein, dass mImageView Null ist. Sie sollten überprüfen, warum R.id.imageView in dieser Ansicht nicht gefunden werden kann.

Answer 2

i GELÖST MY QN

ihr den Code sorry für meine Dummheiten ...

public class StorelayoutFragment extends Fragment { 

ImageView imageview; 
public StorelayoutFragment() { 
    // Required empty public constructor 
} 


@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 
    // Inflate the layout for this fragment 
    View view=inflater.inflate(R.layout.fragment_store_layout, container, false); 

    imageview = (ImageView)view.findViewById(R.id.imageView4); 
    PhotoViewAttacher photoView = new PhotoViewAttacher(imageview); 
      photoView.update(); 
return view; 
}} 

ihr die xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:app="http://schemas.android.com/apk/res-auto" 
xmlns:tools="http://schemas.android.com/tools" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
tools:context="com.sp.ez_mart_z.StoreLayoutFragment"> 

<!-- TODO: Update blank fragment layout --> 

<ImageView 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    app:srcCompat="@drawable/small_layout" 
    android:id="@+id/imageView4" />