Loaded messages from sharedpref

Author: sowmen

app/src/main/java/com/example/chatfull/ChatActivity.java

@@ -11,6 +11,7 @@
 import android.net.Uri;
 import android.os.Bundle;
 import android.os.Environment;
+import android.os.Handler;
 import android.provider.OpenableColumns;
 import android.util.Base64;
 import android.util.Log;
@@ -47,11 +48,13 @@
 import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.Calendar;
+import java.util.Date;
 import java.util.List;
 
 public class ChatActivity extends AppCompatActivity
  implements MessageHolders.ContentChecker<Message>,
- MessagesListAdapter.OnMessageLongClickListener<Message> {
+ MessagesListAdapter.OnMessageLongClickListener<Message>,
+ MessagesListAdapter.OnLoadMoreListener{
 
  private static final int PICK_FILE_REQUEST = 1;
  private static final int PICK_IMAGE_REQUEST = 2;
@@ -68,9 +71,11 @@ public class ChatActivity extends AppCompatActivity
 
  MessagesList messagesList;
  protected final String senderId = "1";
+ private static final int TOTAL_MESSAGES_COUNT = 20;
+ private Date lastLoadedDate;
 
  MessagesListAdapter<Message> adapter;
- int cnt = 0;
+ int cnt = 0; //Sets message counter id
 
  Button btnSend;
  ImageButton btnAttachment, btnImage;
@@ -87,22 +92,7 @@ protected void onCreate(Bundle savedInstanceState) {
  setContentView(R.layout.activity_chat_alternate);
 
  user = (User) getIntent().getSerializableExtra("user");
- messageArrayList = new ArrayList<Message>();
- gson = new Gson();
 
- PREFERENCE_FILE_KEY = user.getId();
- sharedPref = this.getSharedPreferences(
- PREFERENCE_FILE_KEY, Context.MODE_PRIVATE);
- editor = sharedPref.edit();
-
- String jsonDataString = sharedPref.getString(SHARED_PREFERENCES_KEY_MESSAGE_LIST,"");
- if(jsonDataString.length() > 0) {
- Message messageArray[] = gson.fromJson(jsonDataString, Message[].class);
- for (Message msg : messageArray) {
- messageArrayList.add(msg);
- }
- Log.e("MESSAGE_SIZE", messageArrayList.size() + "");
- }
  messageReceiveServer = new MessageReceiveServer(ShowInfoActivity.getSelfIpAddress(), ShowInfoActivity.getSelfPort(), this);
 
  Toolbar toolbar = findViewById(R.id.toolbar);
@@ -154,6 +144,24 @@ public void loadImage(ImageView imageView, @Nullable String url, @Nullable Objec
  ta.recycle();
 
  adapter.setOnMessageLongClickListener(this);
+
+ messageArrayList = new ArrayList<Message>();
+ gson = new Gson();
+
+ PREFERENCE_FILE_KEY = user.getId();
+ sharedPref = this.getSharedPreferences(
+ PREFERENCE_FILE_KEY, Context.MODE_PRIVATE);
+ editor = sharedPref.edit();
+
+ String jsonDataString = sharedPref.getString(SHARED_PREFERENCES_KEY_MESSAGE_LIST,"");
+ if(jsonDataString.length() > 0) {
+ Message messageArray[] = gson.fromJson(jsonDataString, Message[].class);
+ for (Message msg : messageArray) {
+ messageArrayList.add(msg);
+ }
+ adapter.addToEnd(messageArrayList,false);
+ Log.e("MESSAGE_SIZE", messageArrayList.size() + "");
+ }
  }
 
  private void setClipboard(Context context, String text) {
@@ -498,4 +506,30 @@ public void onMessageLongClick(Message message) {
  downloadManager.addCompletedDownload(message.getId() + message.getFilename(), message.getId() + message.getFilename(), true, "image/*", file.getAbsolutePath(), file.length(), true);
  }
  }
+
+ @Override
+ public void onLoadMore(int page, int totalItemsCount) {
+ Log.i("TAG", "onLoadMore: " + page + " " + totalItemsCount);
+ if (totalItemsCount < TOTAL_MESSAGES_COUNT) {
+ loadMessages();
+ }
+ }
+
+ protected void loadMessages() {
+ new Handler().postDelayed(new Runnable() { //imitation of internet connection
+ @Override
+ public void run() {
+ Log.e("load","Ashche");
+ ArrayList<Message> more_messages = new ArrayList<>();
+ for(int i=0, j=0; i<messageArrayList.size() && j<10; i++){
+ if(messageArrayList.get(i).getCreatedAt().before(lastLoadedDate)){
+ more_messages.add(messageArrayList.get(i));
+ j++;
+ }
+ }
+ lastLoadedDate = more_messages.get(more_messages.size() - 1).getCreatedAt();
+ adapter.addToEnd(more_messages, false);
+ }
+ }, 500);
+ }
 }