[英]App keeps stopping whenever I open RecyclerView activity
每当我尝试使用回收站视图打开活动时,我的应用程序都会意外停止。 我尝试了许多其他方法来在我的活动中添加回收站视图。但它们都不起作用。 其他活动完美无缺。
Firestore 正在向我的应用程序发送数据,每次我使用回收站视图运行活动时,数据读取计数都会增加。
我究竟做错了什么?
我的 logcat 错误
2020-08-13 15:50:12.895 17761-17761/? E/om.example.rus: Unknown bits set in runtime_flags: 0x8000
2020-08-13 15:50:20.355 17761-17761/com.example.rush E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.rush, PID: 17761
java.lang.RuntimeException: Found two getters or fields with conflicting case sensitivity for property: name
at com.google.firebase.firestore.util.CustomClassMapper$BeanMapper.addProperty(CustomClassMapper.java:736)
at com.google.firebase.firestore.util.CustomClassMapper$BeanMapper.<init>(CustomClassMapper.java:640)
at com.google.firebase.firestore.util.CustomClassMapper.loadOrCreateBeanMapperForClass(CustomClassMapper.java:377)
at com.google.firebase.firestore.util.CustomClassMapper.convertBean(CustomClassMapper.java:540)
at com.google.firebase.firestore.util.CustomClassMapper.deserializeToClass(CustomClassMapper.java:253)
at com.google.firebase.firestore.util.CustomClassMapper.convertToCustomClass(CustomClassMapper.java:100)
at com.google.firebase.firestore.DocumentSnapshot.toObject(DocumentSnapshot.java:187)
at com.google.firebase.firestore.QueryDocumentSnapshot.toObject(QueryDocumentSnapshot.java:116)
at com.google.firebase.firestore.DocumentSnapshot.toObject(DocumentSnapshot.java:165)
at com.google.firebase.firestore.QueryDocumentSnapshot.toObject(QueryDocumentSnapshot.java:97)
at com.firebase.ui.firestore.ClassSnapshotParser.parseSnapshot(ClassSnapshotParser.java:23)
at com.firebase.ui.firestore.ClassSnapshotParser.parseSnapshot(ClassSnapshotParser.java:12)
at com.firebase.ui.common.BaseCachingSnapshotParser.parseSnapshot(BaseCachingSnapshotParser.java:36)
at com.firebase.ui.common.BaseObservableSnapshotArray.get(BaseObservableSnapshotArray.java:52)
at com.firebase.ui.firestore.FirestoreRecyclerAdapter.getItem(FirestoreRecyclerAdapter.java:86)
at com.firebase.ui.firestore.FirestoreRecyclerAdapter.onBindViewHolder(FirestoreRecyclerAdapter.java:158)
at androidx.recyclerview.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:7065)
at androidx.recyclerview.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:7107)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:6012)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:6279)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6118)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6114)
at androidx.recyclerview.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2303)
at androidx.recyclerview.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1627)
at androidx.recyclerview.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1587)
at androidx.recyclerview.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:665)
at androidx.recyclerview.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:4134)
at androidx.recyclerview.widget.RecyclerView.dispatchLayout(RecyclerView.java:3851)
at androidx.recyclerview.widget.RecyclerView.onLayout(RecyclerView.java:4404)
at android.view.View.layout(View.java:21912)
at android.view.ViewGroup.layout(ViewGroup.java:6260)
at androidx.constraintlayout.widget.ConstraintLayout.onLayout(ConstraintLayout.java:1915)
at android.view.View.layout(View.java:21912)
at android.view.ViewGroup.layout(ViewGroup.java:6260)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332)
at android.widget.FrameLayout.onLayout(FrameLayout.java:270)
at android.view.View.layout(View.java:21912)
at android.view.ViewGroup.layout(ViewGroup.java:6260)
at androidx.appcompat.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:530)
at android.view.View.layout(View.java:21912)
at android.view.ViewGroup.layout(ViewGroup.java:6260)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332)
at android.widget.FrameLayout.onLayout(FrameLayout.java:270)
at android.view.View.layout(View.java:21912)
at android.view.ViewGroup.layout(ViewGroup.java:6260)
2020-08-13 15:50:20.356 17761-17761/com.example.rush E/AndroidRuntime: at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1829)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1673)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1582)
at android.view.View.layout(View.java:21912)
at android.view.ViewGroup.layout(ViewGroup.java:6260)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332)
at android.widget.FrameLayout.onLayout(FrameLayout.java:270)
at com.android.internal.policy.DecorView.onLayout(DecorView.java:779)
at android.view.View.layout(View.java:21912)
at android.view.ViewGroup.layout(ViewGroup.java:6260)
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:3080)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2590)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1721)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7598)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:966)
at android.view.Choreographer.doCallbacks(Choreographer.java:790)
at android.view.Choreographer.doFrame(Choreographer.java:725)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:951)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7356)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
主要活动
package com.example.rush;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import com.firebase.ui.firestore.FirestoreRecyclerOptions;
import com.google.firebase.firestore.CollectionReference;
import com.google.firebase.firestore.FirebaseFirestore;
import com.google.firebase.firestore.Query;
public class MainActivity extends AppCompatActivity {
private FirebaseFirestore db = FirebaseFirestore.getInstance();
private CollectionReference NameRef = db.collection("TalesSR");
private TalesAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setUpRecyclerView();
}
private void setUpRecyclerView() {
Query query = NameRef.orderBy("Name", Query.Direction.DESCENDING);
FirestoreRecyclerOptions<TalesDetails> options = new FirestoreRecyclerOptions.Builder<TalesDetails>()
.setQuery(query, TalesDetails.class)
.build();
adapter = new TalesAdapter(options);
RecyclerView recyclerView = findViewById(R.id.recyclerview);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
recyclerView.setAdapter(adapter);
}
@Override
protected void onStart() {
super.onStart();
adapter.startListening();
}
@Override
protected void onStop() {
super.onStop();
adapter.stopListening();
}
}
Model Class
public class TalesDetails {
public TalesDetails(String name) {
Name = name;
}
public String Name;
public String getName() {
return Name;
}
public void setName(String name) {
Name = name;
}
public TalesDetails() {}
}
适配器 Class
package com.example.rush;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import com.firebase.ui.firestore.FirestoreRecyclerAdapter;
import com.firebase.ui.firestore.FirestoreRecyclerOptions;
public class TalesAdapter extends FirestoreRecyclerAdapter<TalesDetails, TalesAdapter.TalesHolder> {
public TalesAdapter(@NonNull FirestoreRecyclerOptions<TalesDetails> options) {
super(options);
}
@Override
protected void onBindViewHolder(@NonNull TalesHolder holder, int position, @NonNull TalesDetails talesDetails) {
holder.textViewTitle.setText(talesDetails.getName());
}
@NonNull
@Override
public TalesHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.recyclerviewtales,
parent, false);
return new TalesHolder(v);
}
class TalesHolder extends RecyclerView.ViewHolder {
TextView textViewTitle;
public TalesHolder(View itemView) {
super(itemView);
textViewTitle = itemView.findViewById(R.id.tvName);
}
}
}
依赖关系
dependencies {
implementation fileTree(dir: "libs", include: ["*.jar"])
implementation 'androidx.appcompat:appcompat:1.2.0'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
implementation 'androidx.recyclerview:recyclerview:1.1.0'
implementation 'com.google.firebase:firebase-firestore:21.5.0'
testImplementation 'junit:junit:4.12'
implementation 'com.firebaseui:firebase-ui-firestore:6.3.0'
implementation 'com.google.android.material:material:1.2.0'
implementation 'com.google.firebase:firebase-firestore:21.5.0'
implementation 'androidx.multidex:multidex:2.0.1'
androidTestImplementation 'androidx.test.ext:junit:1.1.1'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
}
您的代码中的问题在于您的TalesDetails
class 中的name
属性设置为公共,并且名称不正确。 如果要使用公共字段,则无需添加 getter 或 setter,否则,将其设为私有,如下所示:
public class TalesDetails {
private String name; //Is set private and starting with a lowercase
public TalesDetails() {}
public TalesDetails(String name) {
name = name;
}
public String getName() {
return name;
}
public void setName(String name) {
name = name;
}
}
看, name
属性现在以小写字母开头。 除此之外,请注意在数据库中将名称设置为小写。
您还可以查看以下三个答案, class中的小写字母,数据库中的大写字母,class中的大写字母,数据库中的小写字母和class中的大写字母,数据库中的大写字母。
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