我正在使用 Recycle Adapter类并使用此功能使用博客图片和说明填充片段。但是，当我关闭 BlogActivity并转移到下一个活动时，有时会突然发生应用程序崩溃，错误为
java.lang.IllegalArgumentException:You cannot start a load for a destryoed activity at com.bumptech.glide.manager.RequestManagerRetriever.asseertNotDestroyed(RequestManagerRetriver.java:312)
我的回收适配器类代码是
package com.nepalpolice.cdp;
import android.annotation.TargetApi;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Build;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.text.format.DateFormat;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.PopupWindow;
import android.widget.TextView;
import android.widget.Toast;
import com.bumptech.glide.Glide;
import com.bumptech.glide.request.RequestOptions;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.firestore.DocumentSnapshot;
import com.google.firebase.firestore.EventListener;
import com.google.firebase.firestore.FieldValue;
import com.google.firebase.firestore.FirebaseFirestore;
import com.google.firebase.firestore.FirebaseFirestoreException;
import com.google.firebase.firestore.QuerySnapshot;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import de.hdodenhof.circleimageview.CircleImageView;
import static com.android.volley.VolleyLog.TAG;
import static com.nepalpolice.cdp.webfaq.isNetworkStatusAvialable;
public class BlogRecyclerAdapter extends RecyclerView.Adapter<BlogRecyclerAdapter.ViewHolder> {
public List<BlogPost> blog_list;
public Context context;
private FirebaseFirestore firebaseFirestore;
private FirebaseAuth firebaseAuth;
private PopupWindow popWindow;
public BlogRecyclerAdapter(List<BlogPost> blog_list){
this.blog_list = blog_list;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.blog_list_item, parent, false);
context = parent.getContext();
firebaseFirestore = FirebaseFirestore.getInstance();
firebaseAuth = FirebaseAuth.getInstance();
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(final ViewHolder holder, int position) {
holder.setIsRecyclable(false);
final String blogPostId = blog_list.get(position).BlogPostId;
final String currentUserId = firebaseAuth.getCurrentUser().getUid();
String desc_data = blog_list.get(position).getDesc();
holder.setDescText(desc_data);
String image_url = blog_list.get(position).getImage_url();
String thumbUri = blog_list.get(position).getImage_thumb();
holder.setBlogImage(image_url, thumbUri);
String user_id = blog_list.get(position).getUser_id();
//User Data will be retrieved here...
firebaseFirestore.collection("Users").document(user_id).get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
@Override
public void onComplete(@NonNull Task<DocumentSnapshot> task) {
if(task.isSuccessful()){
String userName = task.getResult().getString("name");
String userImage = task.getResult().getString("image");
holder.setUserData(userName, userImage);
} else {
//Firebase Exception
}
}
});
try {
long millisecond = blog_list.get(position).getTimestamp().getTime();
String dateString = DateFormat.format("MM/dd/yyyy", new Date(millisecond)).toString();
holder.setTime(dateString);
} catch (Exception e) {
Toast.makeText(context, "Exception : " + e.getMessage(), Toast.LENGTH_SHORT).show();
}
//Get Likes Count
firebaseFirestore.collection("Posts/" + blogPostId + "/Likes").addSnapshotListener(((Main2Activity) context),new EventListener<QuerySnapshot>() {
@Override
public void onEvent(QuerySnapshot documentSnapshots, FirebaseFirestoreException e) {
if (e!=null) {
Log.w(TAG, "listening failed",e);
return;
}
if(!documentSnapshots.isEmpty()){
int count = documentSnapshots.size();
holder.updateLikesCount(count);
} else {
holder.updateLikesCount(0);
}
}
});
//Get Likes
firebaseFirestore.collection("Posts/" + blogPostId + "/Likes").document(currentUserId).addSnapshotListener(((Main2Activity) context),new EventListener<DocumentSnapshot>() {
@Override
public void onEvent(DocumentSnapshot documentSnapshot, FirebaseFirestoreException e) {
if (e!=null) {
Log.w(TAG, "listening failed",e);
return;
}
if (documentSnapshot.exists()){
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
holder.blogLikeBtn.setImageDrawable(context.getDrawable(R.mipmap.action_like_accent));
}
else {
holder.blogLikeBtn.setImageDrawable(context.getResources().getDrawable(R.mipmap.action_like_accent));
}
} else {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
holder.blogLikeBtn.setImageDrawable(context.getDrawable(R.mipmap.action_like_gray));
}else{
holder.blogLikeBtn.setImageDrawable(context.getResources().getDrawable(R.mipmap.action_like_gray));
}
}
}
});
//Likes Feature
holder.blogLikeBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
firebaseFirestore.collection("Posts/" + blogPostId + "/Likes").document(currentUserId).get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
@Override
public void onComplete(@NonNull Task<DocumentSnapshot> task) {
if(!task.getResult().exists()){
Map<String, Object> likesMap = new HashMap<>();
likesMap.put("timestamp", FieldValue.serverTimestamp());
firebaseFirestore.collection("Posts/" + blogPostId + "/Likes").document(currentUserId).set(likesMap);
} else {
firebaseFirestore.collection("Posts/" + blogPostId + "/Likes").document(currentUserId).delete();
}
}
});
}
});
holder.blogCommentBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent commentIntent = new Intent(context, CommentsActivity.class);
context.startActivity(commentIntent);
}
});
}
@Override
public int getItemCount() {
return blog_list.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
private View mView;
private TextView descView;
private ImageView blogImageView;
private TextView blogDate;
private TextView blogUserName;
private CircleImageView blogUserImage;
private ImageView blogLikeBtn;
private TextView blogLikeCount;
private ImageView blogCommentBtn;
public ViewHolder(View itemView) {
super(itemView);
mView = itemView;
blogLikeBtn = mView.findViewById(R.id.blog_like_btn);
blogCommentBtn = mView.findViewById(R.id.blog_comment_icon);
}
public void setDescText(String descText){
descView = mView.findViewById(R.id.blog_desc);
descView.setText(descText);
}
public void setBlogImage(String downloadUri, String thumbUri){
blogImageView = mView.findViewById(R.id.blog_image);
RequestOptions requestOptions = new RequestOptions();
requestOptions.placeholder(R.drawable.image_placeholder);
Glide.with(context).applyDefaultRequestOptions(requestOptions).load(downloadUri).thumbnail(
Glide.with(context).load(thumbUri)
).into(blogImageView);
}
public void setTime(String date) {
blogDate = mView.findViewById(R.id.blog_date);
blogDate.setText(date);
}
public void setUserData(String name, String image){
blogUserImage = mView.findViewById(R.id.blog_user_image);
blogUserName = mView.findViewById(R.id.blog_user_name);
blogUserName.setText(name);
RequestOptions placeholderOption = new RequestOptions();
placeholderOption.placeholder(R.drawable.profile_placeholder);
Glide.with(context).applyDefaultRequestOptions(placeholderOption).load(image).into(blogUserImage);
}
public void updateLikesCount(int count){
blogLikeCount = mView.findViewById(R.id.blog_like_count);
blogLikeCount.setText(count + " Likes");
}
}
}
我的MainActivity代码是
public class MainActivity extends AppCompatActivity {
private Toolbar mainToolbar;
private FirebaseAuth mAuth;
private FirebaseFirestore firebaseFirestore;
private String current_user_id;
private FloatingActionButton addPostBtn;
private HomeFragment homeFragment;
private BottomNavigationView mainbottomNav;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mAuth = FirebaseAuth.getInstance();
firebaseFirestore = FirebaseFirestore.getInstance();
mainToolbar = (Toolbar) findViewById(R.id.main_toolbar);
setSupportActionBar(mainToolbar);
getSupportActionBar().setTitle("Central Department of Physics");
mainToolbar.setNavigationOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent newPostIntent = new Intent(Main2Activity.this, MainActivity.class);
startActivity(newPostIntent);
}
});
mainbottomNav = findViewById(R.id.mainBottomNav);
// FRAGMENTS
homeFragment = new HomeFragment();
replaceFragment(homeFragment);
mainbottomNav.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
switch (item.getItemId()){
case R.id.bottom_action_home :
replaceFragment(homeFragment);
return true;
case R.id.bottom_action_account:
return true;
case R.id.bottom_action_notif:
return true;
default:
return false;
}
}
});
addPostBtn = findViewById(R.id.add_post_btn);
addPostBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent newPostIntent = new Intent(Main2Activity.this, NewPostActivity.class);
startActivity(newPostIntent);
}
});
}
@Override
protected void onStart() {
super.onStart();
FirebaseUser currentUser = FirebaseAuth.getInstance().getCurrentUser();
if(currentUser == null){
Intent loginIntent = new Intent(Main2Activity.this, LoginActivity.class);
startActivity(loginIntent);
finish();
} else {
current_user_id = mAuth.getCurrentUser().getUid();
firebaseFirestore.collection("Users").document(current_user_id).get().addOnCompleteListener(new OnCompleteListener<DocumentSnapshot>() {
@Override
public void onComplete(@NonNull Task<DocumentSnapshot> task) {
if(task.isSuccessful()){
if(!task.getResult().exists()){
Intent setupIntent = new Intent(MainActivity.this, SetupActivity.class);
startActivity(setupIntent);
finish();
}
} else {
String errorMessage = task.getException().getMessage();
Toast.makeText(Main2Activity.this, "Error : " + errorMessage, Toast.LENGTH_LONG).show();
}
}
});
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main_menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_logout_btn:
logOut();
return true;
case R.id.action_settings_btn:
Intent settingsIntent = new Intent(MainActivity.this, SetupActivity.class);
startActivity(settingsIntent);
return true;
default:
return false;
}
}
private void logOut() {
mAuth.signOut();
sendToLogin();
}
private void sendToLogin() {
Intent loginIntent = new Intent(MainActivity.this, LoginActivity.class);
startActivity(loginIntent);
finish();
}
private void replaceFragment(Fragment fragment){
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.main_container, fragment);
fragmentTransaction.commit();
}
}
以下是完整的代码https://github.com/akshayejh/PhotoBlog-Android-Blog-App
答案 0 :(得分：4)
在使用Glide之前，请检查您的活动是否正在完成。像这样：
if (!activity.isFinishing()) {
Glide.with(...
}