这是错误：
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.md.HeartOpen, PID: 31667
com.google.firebase.database.DatabaseException: Can't convert object of type java.lang.String to type com.md.HeartOpen.File_Setings.Spacecraft
at com.google.android.gms.internal.zzelw.zzb(Unknown Source:259)
at com.google.android.gms.internal.zzelw.zza(Unknown Source:0)
at com.google.firebase.database.DataSnapshot.getValue(Unknown Source:10)
at com.firebase.ui.database.FirebaseRecyclerAdapter.parseSnapshot(FirebaseRecyclerAdapter.java:151)
at com.firebase.ui.database.FirebaseRecyclerAdapter.getItem(FirebaseRecyclerAdapter.java:140)
at com.firebase.ui.database.FirebaseRecyclerAdapter.onBindViewHolder(FirebaseRecyclerAdapter.java:183)
at android.support.v7.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:6673)
at android.support.v7.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:6714)
at android.support.v7.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:5647)
at android.support.v7.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:5913)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5752)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5748)
at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2232)
at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1559)
at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1519)
at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:614)
at android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3812)
at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3529)
at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:4082)
at android.view.View.layout(View.java:19781)
at android.view.ViewGroup.layout(ViewGroup.java:6144)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1816)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1660)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1569)
at android.view.View.layout(View.java:19781)
at android.view.ViewGroup.layout(ViewGroup.java:6144)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:325)
at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
at android.view.View.layout(View.java:19781)
at android.view.ViewGroup.layout(ViewGroup.java:6144)
at android.support.v7.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:443)
at android.view.View.layout(View.java:19781)
at android.view.ViewGroup.layout(ViewGroup.java:6144)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:325)
at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
at android.view.View.layout(View.java:19781)
at android.view.ViewGroup.layout(ViewGroup.java:6144)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1816)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1660)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1569)
at android.view.View.layout(View.java:19781)
at android.view.ViewGroup.layout(ViewGroup.java:6144)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:325)
at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
at com.android.internal.policy.DecorView.onLayout(DecorView.java:888)
at android.view.View.layout(View.java:19781)
at android.view.ViewGroup.layout(ViewGroup.java:6144)
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2674)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2377)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1515)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7266)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:981)
at android.view.Choreographer.doCallbacks(Choreographer.java:790)
E/AndroidRuntime: at android.view.Choreographer.doFrame(Choreographer.java:721)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:967)
at android.os.Handler.handleCallback(Handler.java:808)
at android.os.Handler.dispatchMessage(Handler.java:101)
at android.os.Looper.loop(Looper.java:166)
at android.app.ActivityThread.main(ActivityThread.java:7425)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:245)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:921)
这是我的活动
public class SizeLikesPostActivity extends AppCompatActivity {
//Firebase
private DatabaseReference mDatabase ;
private DatabaseReference mDatabaseUser ;
private FirebaseAuth mAuthh ;
private RecyclerView mMainList ;
private LinearLayoutManager linearLayoutManager ;
private String name_user , image_user , status_user;
private String currentUserId ;
private String post_key ,user_key;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//left to right
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
getWindow().getDecorView().setLayoutDirection(View.LAYOUT_DIRECTION_RTL);
}
setContentView(R.layout.size_likes_post);
user_key = getIntent().getStringExtra("USER_KEY");
post_key = getIntent().getStringExtra("Post_Key");
mDatabase = FirebaseDatabase.getInstance().getReference().child("Likes").child(post_key);
mDatabase.keepSynced(true); //Oflline Data
//RecycleView
mMainList = (RecyclerView)findViewById(R.id.recycleView);
mMainList.setHasFixedSize(true);
//GetItem new First
linearLayoutManager = new LinearLayoutManager(this);
linearLayoutManager.setReverseLayout(true);
linearLayoutManager.setStackFromEnd(true);
mMainList.setLayoutManager(linearLayoutManager);
}
@Override
protected void onStart() {
super.onStart();
FirebaseRecyclerAdapter<Spacecraft , SizeLikesHolder> firebaseRecyclerAdapter
= new FirebaseRecyclerAdapter<Spacecraft, SizeLikesHolder>(
Spacecraft.class,
R.layout.row_size_likes,
SizeLikesHolder.class,
mDatabase
) {
@Override
protected void populateViewHolder(SizeLikesHolder viewHolder, Spacecraft model, int position) {
final String id_comment = getRef(position).getKey();
// viewHolder.setTitle(name, desc, time, image );
}
};
mMainList.setAdapter(firebaseRecyclerAdapter);
}
public static class SizeLikesHolder extends RecyclerView.ViewHolder{
View mView;
Context context ;
public TextView textName , textComment , timeText ;
public CircleImageView imageUser ;
public SizeLikesHolder(View itemView) {
super(itemView);
mView = itemView;
textName = (TextView)mView.findViewById(R.id.uid_user);
textComment = (TextView)mView.findViewById(R.id.txt_status);
imageUser = (CircleImageView)mView.findViewById(R.id.imageUser);
//Chnage font...
Typeface regular= Typeface.createFromAsset(itemView.getContext().getAssets(),"NizarCoconKurdishRegular.ttf");
Typeface face= Typeface.createFromAsset(itemView.getContext().getAssets(),"NizarCoconKurdish_Bold.otf");
textName.setTypeface(face);
textComment.setTypeface(regular);
}
public void setTitle(String name , String status , final String image){
textName.setText(name);
textComment.setText(status);
//Imgae Post if null set Visibtly Gone to ImageView
if (TextUtils.isEmpty(image)){
Picasso.with(context).load(R.drawable.default_avatar).into(imageUser);
}else {
//Image Post
Picasso.with(context).load(image).networkPolicy(NetworkPolicy.OFFLINE)
.placeholder(R.drawable.default_avatar).into(imageUser , new Callback() {
@Override
public void onSuccess() {
imageUser.setVisibility(View.VISIBLE);
}
@Override
public void onError() {
imageUser.setVisibility(View.GONE);
}
}); }
}
}
}