[英]StartListening() didn't work in OnBindviewHolder or in the onStart() method. Issue with Android Studio 3.4 version
onBindviewHolder 中的 startListening() 不起作用，在 onStart() 方法中也不起作用。
評論后，此行顯示 MainAcitvity 但不顯示此活動中的帖子項目。 如果我要求添加 onStart() 方法，它會顯示紅色熱線。
public class MainActivity extends AppCompatActivity {
private NavigationView navigationView;
private DrawerLayout drawerLayout;
private ActionBarDrawerToggle actionBarDrawerToggle;
private RecyclerView postlist;
private Toolbar mToolbar;
private CircleImageView NavProfileImage;
private TextView NavProfileUserName;
private ImageButton AddNewPostButton;
private FirebaseAuth mAuth;
private DatabaseReference UsersRef, PostsRef;
String currentUserID;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mAuth = FirebaseAuth.getInstance();
currentUserID = mAuth.getCurrentUser().getUid();
UsersRef = FirebaseDatabase.getInstance().getReference().child("Users");
PostsRef = FirebaseDatabase.getInstance().getReference().child("Posts");
mToolbar = (Toolbar) findViewById(R.id.main_page_toolbar);
setSupportActionBar(mToolbar);
getSupportActionBar().setTitle("Home");
AddNewPostButton = (ImageButton) findViewById(R.id.add_new_post_button);
drawerLayout = (DrawerLayout) findViewById(R.id.drawable_layout);
actionBarDrawerToggle = new ActionBarDrawerToggle(MainActivity.this, drawerLayout, R.string.drawer_open, R.string.drawer_close);
drawerLayout.addDrawerListener(actionBarDrawerToggle);
actionBarDrawerToggle.syncState();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
navigationView = (NavigationView) findViewById(R.id.navigation_view);
postlist = (RecyclerView) findViewById(R.id.all_users_post_list);
postlist.setHasFixedSize(true);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
linearLayoutManager.setReverseLayout(true);
linearLayoutManager.setStackFromEnd(true);
postlist.setLayoutManager(linearLayoutManager);
View navView = navigationView.inflateHeaderView(R.layout.nav_header);
NavProfileImage = (CircleImageView) navView.findViewById(R.id.nav_profile_image);
NavProfileUserName = (TextView) navView.findViewById(R.id.nav_user_name);
UsersRef.child(currentUserID).addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
if (dataSnapshot.exists()) {
if (dataSnapshot.hasChild("fullname")) {
String fullname = dataSnapshot.child("fullname").getValue().toString();
NavProfileUserName.setText(fullname);
}
if (dataSnapshot.hasChild("profileimage")) {
String image = dataSnapshot.child("profileimage").getValue().toString();
Picasso.get().load(image).placeholder(R.drawable.profile).into(NavProfileImage);
} else {
Toast.makeText(MainActivity.this, "User doesnot Exist here...", Toast.LENGTH_SHORT).show();
}
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
UserMenuSelector(item);
return false;
}
});
AddNewPostButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
SendUserToPostActivity();
}
});
DisplayAllUsersPosts();
}
private void DisplayAllUsersPosts() {
FirebaseRecyclerOptions<Posts> options = new FirebaseRecyclerOptions.Builder<Posts>().setQuery(PostsRef, Posts.class).build();
final FirebaseRecyclerAdapter<Posts, PostsViewHolder> firebaseRecyclerAdapter = new FirebaseRecyclerAdapter<Posts, PostsViewHolder>(options) {
@Override
protected void onBindViewHolder(@NonNull PostsViewHolder holder, int position, @NonNull Posts model) {
holder.username.setText(model.getFullname());
holder.time.setText(" " + model.getTime());
holder.date.setText(" " + model.getDate());
holder.description.setText(model.getDescription());
Picasso.get().load(model.getProfileimage()).into(holder.user_post_image);
Picasso.get().load(model.getPostimage()).into(holder.postImage);
}
@NonNull
@Override
public PostsViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.all_posts_layout, parent, false);
PostsViewHolder viewHolder = new PostsViewHolder(view);
return viewHolder;
}
};
//firebaseRecyclerAdapter.startListening();
postlist.setAdapter(firebaseRecyclerAdapter);
}
public static class PostsViewHolder extends RecyclerView.ViewHolder {
TextView username, date, time, description;
CircleImageView user_post_image;
ImageView postImage;
public PostsViewHolder(View itemView) {
super(itemView);
username = itemView.findViewById(R.id.post_user_name);
date = itemView.findViewById(R.id.post_date);
time = itemView.findViewById(R.id.post_time);
description = itemView.findViewById(R.id.post_Description);
postImage = itemView.findViewById(R.id.post_image);
user_post_image = itemView.findViewById(R.id.post_profile_image);
}
}
private void SendUserToPostActivity() {
Intent postIntent = new Intent(MainActivity.this, PostActivity.class);
startActivity(postIntent);
}
@Override
protected void onStart() {
super.onStart();
FirebaseUser currentUser = mAuth.getCurrentUser();
if (currentUser == null) {
SendUserToLoginActivity();
} else {
CheckUserExistence();
}
}
private void CheckUserExistence() {
final String current_user_id = mAuth.getCurrentUser().getUid();
UsersRef.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
if (!dataSnapshot.hasChild(current_user_id)) {
SendUserToSetupActivity();
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
private void SendUserToSetupActivity() {
Intent setupIntent = new Intent(MainActivity.this, SetupActivity.class);
setupIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(setupIntent);
finish();
}
private void SendUserToLoginActivity() {
Intent loginIntent = new Intent(MainActivity.this, LoginActivity.class);
loginIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(loginIntent);
finish();
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (actionBarDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
private void UserMenuSelector(MenuItem item) {
switch (item.getItemId()) {
case R.id.nav_post:
SendUserToPostActivity();
break;
case R.id.nav_profile:
Toast.makeText(this, "Profile", Toast.LENGTH_SHORT).show();
break;
case R.id.nav_home:
Toast.makeText(this, "Home", Toast.LENGTH_SHORT).show();
break;
case R.id.nav_friend:
Toast.makeText(this, "Friends", Toast.LENGTH_SHORT).show();
break;
case R.id.nav_find_friends:
Toast.makeText(this, "Find Friends", Toast.LENGTH_SHORT).show();
break;
case R.id.nav_messages:
Toast.makeText(this, "Messages", Toast.LENGTH_SHORT).show();
break;
case R.id.nav_settings:
Toast.makeText(this, "Setting", Toast.LENGTH_SHORT).show();
break;
case R.id.nav_logout:
mAuth.signOut();
SendUserToLoginActivity();
break;
}
}
}
04-19 12:10:05.836 4162-4162/androidwork.app.chadii.socialchatapp E/AndroidRuntime：致命異常：主進程：androidwork.app.chadii.socialchatapp，PID：4162 android.view.InflateException：二進制 XML 文件#25: 在 android.view.LayoutInflater.createView(LayoutInflater.java:633) 在 android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743) 在 android.view.LayoutInflater.rInflate(LayoutInflater.java:806) 的充氣類錯誤) 在 android.view.LayoutInflater.rInflate(LayoutInflater.java:809) 在 android.view.LayoutInflater.rInflate(LayoutInflater.java:809) 在 android.view.LayoutInflater.inflate(LayoutInflater.java:504) 在 android.view .LayoutInflater.inflate(LayoutInflater.java:414) 在 androidwork.app.chadii.socialchatapp.MainActivity$4.onCreateViewHolder(MainActivity.java:165) 在 androidwork.app.chadii.socialchatapp.MainActivity$4.onCreateViewHolder(MainActivity.java:150) ) 在 androidx.recyclerview.widget.RecyclerView$Adapter.createViewHolder(RecyclerView.java:6794) 和 roidx.recyclerview.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:5975) 在 androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5858) 在 android.x.RecyclerView.java:5858) RecyclerView.java:5854) at androidx.recyclerview.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2230) at androidx.recyclerview.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1557) at androidx.recyclerLinearLayoutManagerwidget .fill(LinearLayoutManager.java:1517) 在 androidx.recyclerview.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:612) 在 androidx.recyclerview.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3924) 在 androidx.regetcyclerview RecyclerView.dispatchLayout(RecyclerView.java:3641) at androidx.recyclerview.widget.RecyclerView.consumePendingUpdateOperations(RecyclerView.java:1888) at androidx.recyclerview.widget.RecyclerV iew$1.run(RecyclerView.java:407) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767) at android.view.Choreographer.doCallbacks(Choreographer.java:580) at android.view.Choreographer。 doFrame(Choreographer.java:549) 在 android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753) 在 android.os.Handler.handleCallback(Handler.java:739) 在 android.os.Handler.dispatchMessage(Handler .java:95) 在 android.os.Looper.loop(Looper.java:135) 在 android.app.ActivityThread.main(ActivityThread.java:5293) 在 java.lang.reflect.Method.invoke(Native Method) 在java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) at com.android.internal.os.ZygoteInit.main( ZygoteInit.java:698) 引起：java.lang.reflect.InvocationTargetException at java.lang.reflect.Constructor.newInstance(Native Method) at java.lang.reflect.Constructor.newInstance(Constructor.java:288) at android。 view.LayoutInflater.create View(LayoutInflater.java:607) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743) at android.view.LayoutInflater.rInflate(LayoutInflater.java:806) at android.view.LayoutInflater.rInflate(LayoutInflater.java) :809) 在 android.view.LayoutInflater.rInflate(LayoutInflater.java:809) 在 android.view.LayoutInflater.inflate(LayoutInflater.java:504) 在 android.view.LayoutInflater.inflate(LayoutInflater.java:414) 在
ERROR_HERE
androidwork.app.chadii.socialchatapp.MainActivity$4.onCreateViewHolder(MainActivity.java:165) 在 androidwork.app.chadii.socialchatapp.MainActivity$4.onCreateViewHolder(MainActivity.java:150) 在 androidx.recyclerview.widget.RecyclerView$Adapter。 createViewHolder(RecyclerView.java:6794) at androidx.recyclerview.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:5975) at androidx.recyclerview.widget.RecyclerView$Recycler.getViewRecycler.getViewForPos.8View(androidx.recyclerView.java:5975) .widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5854) 在 androidx.recyclerview.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2230) 在 androidx.recyclerview.widget.LinearLayoutManager.layoutChunk.java:15LayoutManager.layoutChunk(LinearLayoutManager) ) 在 androidx.recyclerview.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1517) 在 androidx.recyclerview.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:612) 在 androidx.r ecyclerview.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3924) at androidx.recyclerview.widget.RecyclerView.dispatchLayout(RecyclerView.java:3641) at androidx.recyclerview.widget.RecyclerView.consumePendingUpdate8Operations) .recyclerview.widget.RecyclerView$1.run(RecyclerView.java:407) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767) at android.view.Choreographer.doCallbacks(Choreographer.java:580) at android .view.Choreographer.doFrame(Choreographer.java:549) 在 android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753) 在 android.os.Handler.handleCallback(Handler.java:739) 在 android.os。 Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5293) at java.lang.reflect.Method.invoke （本機方法）在 java.lang.reflect.Method.invoke(Method.java:372) 在 com.android.internal.os.ZygoteInit$MethodAndArgs Caller.run(ZygoteInit.java:903) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698) 原因：java.lang.IllegalArgumentException：不支持 ScaleType FIT_CENTER。 在 de.hdodenhof.circleimageview.CircleImageView.setScaleType(CircleImageView.java:134) 在 android.widget.ImageView.(ImageView.java:169) 在 android.widget.ImageView.(ImageView.java:135) 在 de.hdodenhof。 circleimageview.CircleImageView.(CircleImageView.java:98) 在 de.hdodenhof.circleimageview.CircleImageView.(CircleImageView.java:94)
java.lang.IllegalArgumentException: ScaleType FIT_CENTER not supported. at de.hdodenhof.circleimageview.CircleImageView.setScaleType(CircleImageView.java:134)
CircleImageView 僅支持 ScaleType.CENTER_CROP
public class CircleImageView extends ImageView {
private static final ScaleType SCALE_TYPE = ScaleType.CENTER_CROP;
...
@Override
public void setScaleType(ScaleType scaleType) {
if (scaleType != SCALE_TYPE) {
throw new IllegalArgumentException(String.format("ScaleType %s not supported.", scaleType));
}
}
...
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