图像未发送给另一方 Android Studio java
Image doesn't send for other side Android Studio java
我有问题，因为我无法为另一方发送图像，它重复或发送空消息，但正常消息工作正常。
我尝试了很多教程并更改了一些 classes，但没有任何效果
这是我的回收站视图 class:
public final class ChatAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private final List<ChatMessage> messages;
private Bitmap profileImage;
private final String senderId;
private static final int VIEW_TYPE_SENT = 1;
private static final int VIEW_TYPE_RECEIVED = 2;
public void setReceiverProfileImage(Bitmap bitmap) {
this.profileImage = bitmap;
}
public ChatAdapter(List<ChatMessage> messages, Bitmap profileImage, String senderId) {
this.messages = messages;
this.profileImage = profileImage;
this.senderId = senderId;
}
@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
return (viewType == VIEW_TYPE_SENT ? new SentMessageViewHolder(
ItemContainerSentMessageBinding.inflate(
LayoutInflater.from(parent.getContext()),
parent,
false)
) : new ReceivedMessageViewHolder(
ItemContainerReceivedMessageBinding.inflate(
LayoutInflater.from(parent.getContext()),
parent,
false)
));
}
@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
if (getItemViewType(position) == VIEW_TYPE_SENT) {
((SentMessageViewHolder) holder).setData(messages.get(position));
} else {
((ReceivedMessageViewHolder) holder).setData(messages.get(position), profileImage);
}
}
@Override
public int getItemCount() {
return messages.size();
}
@Override
public int getItemViewType(int position) {
return (messages.get(position).getSenderId().equals(senderId) ? VIEW_TYPE_SENT : VIEW_TYPE_RECEIVED);
}
public static class SentMessageViewHolder extends RecyclerView.ViewHolder {
private final ItemContainerSentMessageBinding binding;
public SentMessageViewHolder(ItemContainerSentMessageBinding binding) {
super(binding.getRoot());
this.binding = binding;
}
void setData(ChatMessage message) {
binding.textMessage.setText(message.getMessage());
binding.textDateTime.setText(message.getDateTime());
binding.image.setImageBitmap(message.getImage());
}
}
public static class ReceivedMessageViewHolder extends RecyclerView.ViewHolder {
private final ItemContainerReceivedMessageBinding binding;
public ReceivedMessageViewHolder(ItemContainerReceivedMessageBinding binding) {
super(binding.getRoot());
this.binding = binding;
}
void setData(ChatMessage message, Bitmap bitmap) {
binding.textMessage.setText(message.getMessage());
binding.textDateTime.setText(message.getDateTime());
if (bitmap != null) {
binding.imageProfile.setImageBitmap(bitmap);
}
binding.image.setImageBitmap(message.getImage());
}
}
}
这是收到的消息：
<com.makeramen.roundedimageview.RoundedImageView
android:id="@+id/imageProfile"
android:layout_width="25dp"
android:layout_height="25dp"
android:background="@drawable/background_image"
android:scaleType="centerCrop"
app:layout_constraintBottom_toBottomOf="@id/textMessage"
app:layout_constraintStart_toStartOf="parent"
app:riv_oval="true"/>
<TextView
android:id="@+id/textMessage"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="4dp"
android:layout_marginLeft="4dp"
android:background="@drawable/background_received_message"
android:paddingStart="12dp"
android:paddingEnd="12dp"
android:paddingTop="8dp"
android:paddingBottom="8dp"
app:layout_constraintWidth_max="wrap"
android:textColor="@color/white"
android:textSize="13sp"
app:layout_constraintStart_toEndOf="@id/imageProfile"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintWidth_percent="0.75"/>
<ImageView
android:id="@+id/image"
android:background="@drawable/background_sent_message"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:layout_marginStart="4dp"
android:maxWidth="250dp"
android:maxHeight="250dp"
app:layout_constraintStart_toEndOf="@id/imageProfile"
app:layout_constraintTop_toTopOf="parent"/>
<TextView
android:id="@+id/textDateTime"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="4dp"
android:textColor="@color/secondary_text"
android:textSize="8sp"
app:layout_constraintStart_toStartOf="@id/textMessage"
app:layout_constraintTop_toBottomOf="@id/textMessage"/>
并选择图片activity:
private final ActivityResultLauncher<Intent> pickImage = registerForActivityResult(new ActivityResultContracts.StartActivityForResult(), result -> {
if (result.getResultCode() != RESULT_OK) return;
if (result.getData() == null) return;
Uri imageUri = result.getData().getData();
try {
InputStream inputStream = getContentResolver().openInputStream(imageUri);
Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
this.encodingImage = encodeImage(bitmap);
sendMessage();
} catch (FileNotFoundException e) {
e.printStackTrace();
}
});
并在此处创建 ChatMessage 对象 (eventListener)：
private final EventListener<QuerySnapshot> eventListener = (value, error) -> {
if (error != null) {
return;
}
if (value != null) {
int count = messages.size();
for (DocumentChange documentChange : value.getDocumentChanges()) {
if (documentChange.getType() == DocumentChange.Type.ADDED) {
ChatMessage chatMessage = new ChatMessage(
documentChange.getDocument().getString(Constants.KEY_SENDER_ID),
documentChange.getDocument().getString(Constants.KEY_RECEIVER_ID),
documentChange.getDocument().getString(Constants.KEY_MESSAGE),
getReadableDateTime(documentChange.getDocument().getDate(Constants.KEY_TIMESTAMP)),
documentChange.getDocument().getDate(Constants.KEY_TIMESTAMP)
);
if (!encodingImage.isEmpty()) {
byte[] decodedString = Base64.decode(encodingImage, Base64.DEFAULT);
Bitmap decodedByte = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);
chatMessage.setImage(decodedByte);
}
messages.add(chatMessage);
}
}
Collections.sort(messages, Comparator.comparing(ChatMessage::getDate));
if (count == 0) {
chatAdapter.notifyDataSetChanged();
} else {
chatAdapter.notifyItemRangeInserted(messages.size(), messages.size());
binding.chatRecyclerView.smoothScrollToPosition(messages.size() - 1);
}
binding.chatRecyclerView.setVisibility(View.VISIBLE);
}
binding.progressBar.setVisibility(View.GONE);
if (conversionId == null) checkForConversion();
};
发送消息方法：
private void sendMessage() {
Map<String, Object> message = new HashMap<>();
message.put(Constants.KEY_SENDER_ID, preferenceManager.getString(Constants.KEY_USER_ID));
message.put(Constants.KEY_RECEIVER_ID, user.getId());
message.put(Constants.KEY_MESSAGE, binding.inputMessage.getText().toString());
if (!encodingImage.isEmpty()) {
message.put(Constants.KEY_IMAGE_MESSAGE, encodingImage);
}
message.put(Constants.KEY_TIMESTAMP, new Date());
db.collection(Constants.KEY_COLLECTION_CHAT).add(message);
if (conversionId != null) {
updateConversion(binding.inputMessage.getText().toString());
} else {
Map<String, Object> conversion = new HashMap<>();
conversion.put(Constants.KEY_SENDER_ID, preferenceManager.getString(Constants.KEY_USER_ID));
conversion.put(Constants.KEY_SENDER_NAME, preferenceManager.getString(Constants.KEY_NAME));
conversion.put(Constants.KEY_SENDER_IMAGE, preferenceManager.getString(Constants.KEY_IMAGE));
conversion.put(Constants.KEY_RECEIVER_ID, user.getId());
conversion.put(Constants.KEY_RECEIVER_NAME, user.getName());
conversion.put(Constants.KEY_RECEIVER_IMAGE, user.getImage());
conversion.put(Constants.KEY_LAST_MESSAGE, binding.inputMessage.getText().toString());
conversion.put(Constants.KEY_TIMESTAMP, new Date());
addConversion(conversion);
}
if (!isReceiverAvaible) {
try {
JSONArray tokens = new JSONArray();
tokens.put(user.getToken());
JSONObject data = new JSONObject();
data.put(Constants.KEY_USER_ID, preferenceManager.getString(Constants.KEY_USER_ID));
data.put(Constants.KEY_NAME, preferenceManager.getString(Constants.KEY_NAME));
data.put(Constants.KEY_FCM_TOKEN, preferenceManager.getString(Constants.KEY_FCM_TOKEN));
data.put(Constants.KEY_MESSAGE, binding.inputMessage.getText().toString());
JSONObject body = new JSONObject();
body.put(Constants.REMOTE_MSG_DATA, data);
body.put(Constants.REMOTE_MSG_REGISTRATION_IDS, tokens);
sendNotification(body.toString());
} catch (JSONException e) {
e.printStackTrace();
}
}
binding.inputMessage.setText(null);
}
listenMessages 方法：
private void listenMessages() {
db.collection(Constants.KEY_COLLECTION_CHAT)
.whereEqualTo(Constants.KEY_SENDER_ID, preferenceManager.getString(Constants.KEY_USER_ID))
.whereEqualTo(Constants.KEY_RECEIVER_ID, user.getId())
.addSnapshotListener(eventListener);
db.collection(Constants.KEY_COLLECTION_CHAT)
.whereEqualTo(Constants.KEY_SENDER_ID, user.getId())
.whereEqualTo(Constants.KEY_RECEIVER_ID, preferenceManager.getString(Constants.KEY_USER_ID))
.addSnapshotListener(eventListener);
}
private String encodeImage(Bitmap bitmap) {
int previewWidth = 300;
int previewHeight = bitmap.getHeight() * previewWidth / bitmap.getWidth();
Bitmap previewBitmap = Bitmap.createScaledBitmap(bitmap, previewWidth, previewHeight, false);
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
previewBitmap.compress(Bitmap.CompressFormat.JPEG, 50, byteArrayOutputStream);
return Base64.encodeToString(byteArrayOutputStream.toByteArray(), Base64.DEFAULT);
}
请帮忙谢谢！
问题
您实际上是在向适配器提供刚刚创建的 encodingImage，这就是为什么您会重复出现图像或根本没有图像的原因。
解决方案
这个解决方案有两个部分：
- 重新格式化方法及其参数
- 更改代码以选择图像以发送图像
开始吧！
1。重新格式化方法及其参数
首先，您需要在sendMessage()方法中添加1个参数。它看起来像这样：
private void sendMessage(String encodedImage) {
Map<String, Object> message = new HashMap<>();
message.put(Constants.KEY_SENDER_ID, preferenceManager.getString(Constants.KEY_USER_ID));
message.put(Constants.KEY_RECEIVER_ID, user.getId());
message.put(Constants.KEY_MESSAGE, binding.inputMessage.getText().toString());
message.put(Constants.KEY_IMAGE_MESSAGE, encodedImage);
message.put(Constants.KEY_TIMESTAMP, new Date());
db.collection(Constants.KEY_COLLECTION_CHAT).add(message);
if (conversionId != null) {
updateConversion(binding.inputMessage.getText().toString());
} else {
Map<String, Object> conversion = new HashMap<>();
conversion.put(Constants.KEY_SENDER_ID, preferenceManager.getString(Constants.KEY_USER_ID));
conversion.put(Constants.KEY_SENDER_NAME, preferenceManager.getString(Constants.KEY_NAME));
conversion.put(Constants.KEY_SENDER_IMAGE, preferenceManager.getString(Constants.KEY_IMAGE));
conversion.put(Constants.KEY_RECEIVER_ID, user.getId());
conversion.put(Constants.KEY_RECEIVER_NAME, user.getName());
conversion.put(Constants.KEY_RECEIVER_IMAGE, user.getImage());
conversion.put(Constants.KEY_LAST_MESSAGE, binding.inputMessage.getText().toString());
conversion.put(Constants.KEY_TIMESTAMP, new Date());
addConversion(conversion);
}
if (!isReceiverAvaible) {
try {
JSONArray tokens = new JSONArray();
tokens.put(user.getToken());
JSONObject data = new JSONObject();
data.put(Constants.KEY_USER_ID, preferenceManager.getString(Constants.KEY_USER_ID));
data.put(Constants.KEY_NAME, preferenceManager.getString(Constants.KEY_NAME));
data.put(Constants.KEY_FCM_TOKEN, preferenceManager.getString(Constants.KEY_FCM_TOKEN));
data.put(Constants.KEY_MESSAGE, binding.inputMessage.getText().toString());
JSONObject body = new JSONObject();
body.put(Constants.REMOTE_MSG_DATA, data);
body.put(Constants.REMOTE_MSG_REGISTRATION_IDS, tokens);
sendNotification(body.toString());
} catch (JSONException e) {
e.printStackTrace();
}
}
binding.inputMessage.setText(null);
}
在此之后，您需要更改 eventListener 对象。它看起来像这样：
private final EventListener<QuerySnapshot> eventListener = (value, error) -> {
if (error != null) {
return;
}
if (value != null) {
int count = messages.size();
for (DocumentChange documentChange : value.getDocumentChanges()) {
if (documentChange.getType() == DocumentChange.Type.ADDED) {
ChatMessage chatMessage = new ChatMessage(
documentChange.getDocument().getString(Constants.KEY_SENDER_ID),
documentChange.getDocument().getString(Constants.KEY_RECEIVER_ID),
documentChange.getDocument().getString(Constants.KEY_MESSAGE),
getReadableDateTime(documentChange.getDocument().getDate(Constants.KEY_TIMESTAMP)),
documentChange.getDocument().getDate(Constants.KEY_TIMESTAMP)
);
if (documentChange.getDocument().getString(Constants.KEY_IMAGE_MESSAGE) != null && !documentChange.getDocument().getString(Constants.KEY_IMAGE_MESSAGE).isEmpty()) {
byte[] decodedString = Base64.decode((documentChange.getDocument().getString(Constants.KEY_IMAGE_MESSAGE, Base64.DEFAULT);
Bitmap decodedByte = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);
chatMessage.setImage(decodedByte);
}
messages.add(chatMessage);
}
}
Collections.sort(messages, Comparator.comparing(ChatMessage::getDate));
if (count == 0) {
chatAdapter.notifyDataSetChanged();
} else {
chatAdapter.notifyItemRangeInserted(messages.size(), messages.size());
binding.chatRecyclerView.smoothScrollToPosition(messages.size() - 1);
}
binding.chatRecyclerView.setVisibility(View.VISIBLE);
}
binding.progressBar.setVisibility(View.GONE);
if (conversionId == null) checkForConversion();
};
2。更改代码以选择图像以发送图像
现在您在尝试发送图像方法时做了一件非常非常错误的事情。这个问题从您选择图像的地方开始。要解决它，请将其替换为以下代码：
private final ActivityResultLauncher<Intent> pickImage = registerForActivityResult(new ActivityResultContracts.StartActivityForResult(), result -> {
if (result.getResultCode() != RESULT_OK) return;
if (result.getData() == null) return;
Uri imageUri = result.getData().getData();
try {
Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), imageUri);
sendMessage(encodeImage(bitmap));
} catch (FileNotFoundException e) {
e.printStackTrace();
}
});
您现在还需要更改 encodeImage 方法！:
private String encodeImage(Bitmap bitmap) {
int previewWidth = 300;
int previewHeight = bitmap.getHeight() * previewWidth / bitmap.getWidth();
Bitmap previewBitmap = Bitmap.createScaledBitmap(bitmap, previewWidth, previewHeight, false);
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
previewBitmap.compress(Bitmap.CompressFormat.JPEG, 50, byteArrayOutputStream);
String str = Base64.encodeToString(byteArrayOutputStream.toByteArray(), Base64.DEFAULT);
return str == null ? "" : str;
}
我有问题，因为我无法为另一方发送图像，它重复或发送空消息，但正常消息工作正常。 我尝试了很多教程并更改了一些 classes，但没有任何效果
这是我的回收站视图 class:
public final class ChatAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private final List<ChatMessage> messages;
private Bitmap profileImage;
private final String senderId;
private static final int VIEW_TYPE_SENT = 1;
private static final int VIEW_TYPE_RECEIVED = 2;
public void setReceiverProfileImage(Bitmap bitmap) {
this.profileImage = bitmap;
}
public ChatAdapter(List<ChatMessage> messages, Bitmap profileImage, String senderId) {
this.messages = messages;
this.profileImage = profileImage;
this.senderId = senderId;
}
@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
return (viewType == VIEW_TYPE_SENT ? new SentMessageViewHolder(
ItemContainerSentMessageBinding.inflate(
LayoutInflater.from(parent.getContext()),
parent,
false)
) : new ReceivedMessageViewHolder(
ItemContainerReceivedMessageBinding.inflate(
LayoutInflater.from(parent.getContext()),
parent,
false)
));
}
@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
if (getItemViewType(position) == VIEW_TYPE_SENT) {
((SentMessageViewHolder) holder).setData(messages.get(position));
} else {
((ReceivedMessageViewHolder) holder).setData(messages.get(position), profileImage);
}
}
@Override
public int getItemCount() {
return messages.size();
}
@Override
public int getItemViewType(int position) {
return (messages.get(position).getSenderId().equals(senderId) ? VIEW_TYPE_SENT : VIEW_TYPE_RECEIVED);
}
public static class SentMessageViewHolder extends RecyclerView.ViewHolder {
private final ItemContainerSentMessageBinding binding;
public SentMessageViewHolder(ItemContainerSentMessageBinding binding) {
super(binding.getRoot());
this.binding = binding;
}
void setData(ChatMessage message) {
binding.textMessage.setText(message.getMessage());
binding.textDateTime.setText(message.getDateTime());
binding.image.setImageBitmap(message.getImage());
}
}
public static class ReceivedMessageViewHolder extends RecyclerView.ViewHolder {
private final ItemContainerReceivedMessageBinding binding;
public ReceivedMessageViewHolder(ItemContainerReceivedMessageBinding binding) {
super(binding.getRoot());
this.binding = binding;
}
void setData(ChatMessage message, Bitmap bitmap) {
binding.textMessage.setText(message.getMessage());
binding.textDateTime.setText(message.getDateTime());
if (bitmap != null) {
binding.imageProfile.setImageBitmap(bitmap);
}
binding.image.setImageBitmap(message.getImage());
}
}
}
这是收到的消息：
<com.makeramen.roundedimageview.RoundedImageView
android:id="@+id/imageProfile"
android:layout_width="25dp"
android:layout_height="25dp"
android:background="@drawable/background_image"
android:scaleType="centerCrop"
app:layout_constraintBottom_toBottomOf="@id/textMessage"
app:layout_constraintStart_toStartOf="parent"
app:riv_oval="true"/>
<TextView
android:id="@+id/textMessage"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="4dp"
android:layout_marginLeft="4dp"
android:background="@drawable/background_received_message"
android:paddingStart="12dp"
android:paddingEnd="12dp"
android:paddingTop="8dp"
android:paddingBottom="8dp"
app:layout_constraintWidth_max="wrap"
android:textColor="@color/white"
android:textSize="13sp"
app:layout_constraintStart_toEndOf="@id/imageProfile"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintWidth_percent="0.75"/>
<ImageView
android:id="@+id/image"
android:background="@drawable/background_sent_message"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:layout_marginStart="4dp"
android:maxWidth="250dp"
android:maxHeight="250dp"
app:layout_constraintStart_toEndOf="@id/imageProfile"
app:layout_constraintTop_toTopOf="parent"/>
<TextView
android:id="@+id/textDateTime"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="4dp"
android:textColor="@color/secondary_text"
android:textSize="8sp"
app:layout_constraintStart_toStartOf="@id/textMessage"
app:layout_constraintTop_toBottomOf="@id/textMessage"/>
并选择图片activity:
private final ActivityResultLauncher<Intent> pickImage = registerForActivityResult(new ActivityResultContracts.StartActivityForResult(), result -> {
if (result.getResultCode() != RESULT_OK) return;
if (result.getData() == null) return;
Uri imageUri = result.getData().getData();
try {
InputStream inputStream = getContentResolver().openInputStream(imageUri);
Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
this.encodingImage = encodeImage(bitmap);
sendMessage();
} catch (FileNotFoundException e) {
e.printStackTrace();
}
});
并在此处创建 ChatMessage 对象 (eventListener)：
private final EventListener<QuerySnapshot> eventListener = (value, error) -> {
if (error != null) {
return;
}
if (value != null) {
int count = messages.size();
for (DocumentChange documentChange : value.getDocumentChanges()) {
if (documentChange.getType() == DocumentChange.Type.ADDED) {
ChatMessage chatMessage = new ChatMessage(
documentChange.getDocument().getString(Constants.KEY_SENDER_ID),
documentChange.getDocument().getString(Constants.KEY_RECEIVER_ID),
documentChange.getDocument().getString(Constants.KEY_MESSAGE),
getReadableDateTime(documentChange.getDocument().getDate(Constants.KEY_TIMESTAMP)),
documentChange.getDocument().getDate(Constants.KEY_TIMESTAMP)
);
if (!encodingImage.isEmpty()) {
byte[] decodedString = Base64.decode(encodingImage, Base64.DEFAULT);
Bitmap decodedByte = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);
chatMessage.setImage(decodedByte);
}
messages.add(chatMessage);
}
}
Collections.sort(messages, Comparator.comparing(ChatMessage::getDate));
if (count == 0) {
chatAdapter.notifyDataSetChanged();
} else {
chatAdapter.notifyItemRangeInserted(messages.size(), messages.size());
binding.chatRecyclerView.smoothScrollToPosition(messages.size() - 1);
}
binding.chatRecyclerView.setVisibility(View.VISIBLE);
}
binding.progressBar.setVisibility(View.GONE);
if (conversionId == null) checkForConversion();
};
发送消息方法：
private void sendMessage() {
Map<String, Object> message = new HashMap<>();
message.put(Constants.KEY_SENDER_ID, preferenceManager.getString(Constants.KEY_USER_ID));
message.put(Constants.KEY_RECEIVER_ID, user.getId());
message.put(Constants.KEY_MESSAGE, binding.inputMessage.getText().toString());
if (!encodingImage.isEmpty()) {
message.put(Constants.KEY_IMAGE_MESSAGE, encodingImage);
}
message.put(Constants.KEY_TIMESTAMP, new Date());
db.collection(Constants.KEY_COLLECTION_CHAT).add(message);
if (conversionId != null) {
updateConversion(binding.inputMessage.getText().toString());
} else {
Map<String, Object> conversion = new HashMap<>();
conversion.put(Constants.KEY_SENDER_ID, preferenceManager.getString(Constants.KEY_USER_ID));
conversion.put(Constants.KEY_SENDER_NAME, preferenceManager.getString(Constants.KEY_NAME));
conversion.put(Constants.KEY_SENDER_IMAGE, preferenceManager.getString(Constants.KEY_IMAGE));
conversion.put(Constants.KEY_RECEIVER_ID, user.getId());
conversion.put(Constants.KEY_RECEIVER_NAME, user.getName());
conversion.put(Constants.KEY_RECEIVER_IMAGE, user.getImage());
conversion.put(Constants.KEY_LAST_MESSAGE, binding.inputMessage.getText().toString());
conversion.put(Constants.KEY_TIMESTAMP, new Date());
addConversion(conversion);
}
if (!isReceiverAvaible) {
try {
JSONArray tokens = new JSONArray();
tokens.put(user.getToken());
JSONObject data = new JSONObject();
data.put(Constants.KEY_USER_ID, preferenceManager.getString(Constants.KEY_USER_ID));
data.put(Constants.KEY_NAME, preferenceManager.getString(Constants.KEY_NAME));
data.put(Constants.KEY_FCM_TOKEN, preferenceManager.getString(Constants.KEY_FCM_TOKEN));
data.put(Constants.KEY_MESSAGE, binding.inputMessage.getText().toString());
JSONObject body = new JSONObject();
body.put(Constants.REMOTE_MSG_DATA, data);
body.put(Constants.REMOTE_MSG_REGISTRATION_IDS, tokens);
sendNotification(body.toString());
} catch (JSONException e) {
e.printStackTrace();
}
}
binding.inputMessage.setText(null);
}
listenMessages 方法：
private void listenMessages() {
db.collection(Constants.KEY_COLLECTION_CHAT)
.whereEqualTo(Constants.KEY_SENDER_ID, preferenceManager.getString(Constants.KEY_USER_ID))
.whereEqualTo(Constants.KEY_RECEIVER_ID, user.getId())
.addSnapshotListener(eventListener);
db.collection(Constants.KEY_COLLECTION_CHAT)
.whereEqualTo(Constants.KEY_SENDER_ID, user.getId())
.whereEqualTo(Constants.KEY_RECEIVER_ID, preferenceManager.getString(Constants.KEY_USER_ID))
.addSnapshotListener(eventListener);
}
private String encodeImage(Bitmap bitmap) {
int previewWidth = 300;
int previewHeight = bitmap.getHeight() * previewWidth / bitmap.getWidth();
Bitmap previewBitmap = Bitmap.createScaledBitmap(bitmap, previewWidth, previewHeight, false);
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
previewBitmap.compress(Bitmap.CompressFormat.JPEG, 50, byteArrayOutputStream);
return Base64.encodeToString(byteArrayOutputStream.toByteArray(), Base64.DEFAULT);
}
请帮忙谢谢！
问题
您实际上是在向适配器提供刚刚创建的 encodingImage，这就是为什么您会重复出现图像或根本没有图像的原因。
解决方案
这个解决方案有两个部分：
- 重新格式化方法及其参数
- 更改代码以选择图像以发送图像
开始吧！
1。重新格式化方法及其参数
首先，您需要在sendMessage()方法中添加1个参数。它看起来像这样：
private void sendMessage(String encodedImage) {
Map<String, Object> message = new HashMap<>();
message.put(Constants.KEY_SENDER_ID, preferenceManager.getString(Constants.KEY_USER_ID));
message.put(Constants.KEY_RECEIVER_ID, user.getId());
message.put(Constants.KEY_MESSAGE, binding.inputMessage.getText().toString());
message.put(Constants.KEY_IMAGE_MESSAGE, encodedImage);
message.put(Constants.KEY_TIMESTAMP, new Date());
db.collection(Constants.KEY_COLLECTION_CHAT).add(message);
if (conversionId != null) {
updateConversion(binding.inputMessage.getText().toString());
} else {
Map<String, Object> conversion = new HashMap<>();
conversion.put(Constants.KEY_SENDER_ID, preferenceManager.getString(Constants.KEY_USER_ID));
conversion.put(Constants.KEY_SENDER_NAME, preferenceManager.getString(Constants.KEY_NAME));
conversion.put(Constants.KEY_SENDER_IMAGE, preferenceManager.getString(Constants.KEY_IMAGE));
conversion.put(Constants.KEY_RECEIVER_ID, user.getId());
conversion.put(Constants.KEY_RECEIVER_NAME, user.getName());
conversion.put(Constants.KEY_RECEIVER_IMAGE, user.getImage());
conversion.put(Constants.KEY_LAST_MESSAGE, binding.inputMessage.getText().toString());
conversion.put(Constants.KEY_TIMESTAMP, new Date());
addConversion(conversion);
}
if (!isReceiverAvaible) {
try {
JSONArray tokens = new JSONArray();
tokens.put(user.getToken());
JSONObject data = new JSONObject();
data.put(Constants.KEY_USER_ID, preferenceManager.getString(Constants.KEY_USER_ID));
data.put(Constants.KEY_NAME, preferenceManager.getString(Constants.KEY_NAME));
data.put(Constants.KEY_FCM_TOKEN, preferenceManager.getString(Constants.KEY_FCM_TOKEN));
data.put(Constants.KEY_MESSAGE, binding.inputMessage.getText().toString());
JSONObject body = new JSONObject();
body.put(Constants.REMOTE_MSG_DATA, data);
body.put(Constants.REMOTE_MSG_REGISTRATION_IDS, tokens);
sendNotification(body.toString());
} catch (JSONException e) {
e.printStackTrace();
}
}
binding.inputMessage.setText(null);
}
在此之后，您需要更改 eventListener 对象。它看起来像这样：
private final EventListener<QuerySnapshot> eventListener = (value, error) -> {
if (error != null) {
return;
}
if (value != null) {
int count = messages.size();
for (DocumentChange documentChange : value.getDocumentChanges()) {
if (documentChange.getType() == DocumentChange.Type.ADDED) {
ChatMessage chatMessage = new ChatMessage(
documentChange.getDocument().getString(Constants.KEY_SENDER_ID),
documentChange.getDocument().getString(Constants.KEY_RECEIVER_ID),
documentChange.getDocument().getString(Constants.KEY_MESSAGE),
getReadableDateTime(documentChange.getDocument().getDate(Constants.KEY_TIMESTAMP)),
documentChange.getDocument().getDate(Constants.KEY_TIMESTAMP)
);
if (documentChange.getDocument().getString(Constants.KEY_IMAGE_MESSAGE) != null && !documentChange.getDocument().getString(Constants.KEY_IMAGE_MESSAGE).isEmpty()) {
byte[] decodedString = Base64.decode((documentChange.getDocument().getString(Constants.KEY_IMAGE_MESSAGE, Base64.DEFAULT);
Bitmap decodedByte = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);
chatMessage.setImage(decodedByte);
}
messages.add(chatMessage);
}
}
Collections.sort(messages, Comparator.comparing(ChatMessage::getDate));
if (count == 0) {
chatAdapter.notifyDataSetChanged();
} else {
chatAdapter.notifyItemRangeInserted(messages.size(), messages.size());
binding.chatRecyclerView.smoothScrollToPosition(messages.size() - 1);
}
binding.chatRecyclerView.setVisibility(View.VISIBLE);
}
binding.progressBar.setVisibility(View.GONE);
if (conversionId == null) checkForConversion();
};
2。更改代码以选择图像以发送图像
现在您在尝试发送图像方法时做了一件非常非常错误的事情。这个问题从您选择图像的地方开始。要解决它，请将其替换为以下代码：
private final ActivityResultLauncher<Intent> pickImage = registerForActivityResult(new ActivityResultContracts.StartActivityForResult(), result -> {
if (result.getResultCode() != RESULT_OK) return;
if (result.getData() == null) return;
Uri imageUri = result.getData().getData();
try {
Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), imageUri);
sendMessage(encodeImage(bitmap));
} catch (FileNotFoundException e) {
e.printStackTrace();
}
});
您现在还需要更改 encodeImage 方法！:
private String encodeImage(Bitmap bitmap) {
int previewWidth = 300;
int previewHeight = bitmap.getHeight() * previewWidth / bitmap.getWidth();
Bitmap previewBitmap = Bitmap.createScaledBitmap(bitmap, previewWidth, previewHeight, false);
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
previewBitmap.compress(Bitmap.CompressFormat.JPEG, 50, byteArrayOutputStream);
String str = Base64.encodeToString(byteArrayOutputStream.toByteArray(), Base64.DEFAULT);
return str == null ? "" : str;
}