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AshleshkAshleshk
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Twitter App
Feed.java receives Feed from Twiteer App Starter App is like Login
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‎twitter/Feed.java

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package com.lenovo.twitter;
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import android.support.v7.app.AppCompatActivity;
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import android.os.Bundle;
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import android.widget.ListView;
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import android.widget.SimpleAdapter;
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import com.parse.FindCallback;
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import com.parse.ParseException;
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import com.parse.ParseObject;
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import com.parse.ParseQuery;
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import com.parse.ParseUser;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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public class Feed extends AppCompatActivity {
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_feed);
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setTitle("Your Feed");
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final ListView feedListView = (ListView) findViewById(R.id.feedListView);
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ParseQuery<ParseObject> query = ParseQuery.getQuery("Tweet");
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query.whereContainedIn("username", ParseUser.getCurrentUser().getList("isFollowing"));
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query.orderByDescending("createdAt");
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query.setLimit(20);
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query.findInBackground(new FindCallback<ParseObject>() {
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@Override
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public void done(List<ParseObject> objects, ParseException e) {
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if (e == null) {
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if (objects.size() > 0) {
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List<Map<String, String>> tweetData = new ArrayList<Map<String, String>>();
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for (ParseObject tweet : objects) {
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Map<String, String> tweetInfo = new HashMap<String, String>();
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tweetInfo.put("content", tweet.getString("tweet"));
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tweetInfo.put("username", tweet.getString("username"));
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tweetData.add(tweetInfo);
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}
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SimpleAdapter simpleAdapter = new SimpleAdapter(Feed.this, tweetData, android.R.layout.simple_list_item_2, new String[] {"content", "username"}, new int[] {android.R.id.text1, android.R.id.text2});
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feedListView.setAdapter(simpleAdapter);
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}
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}
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}
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});
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}
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}

‎twitter/Main2Activity.java

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package com.lenovo.twitter;
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import android.content.DialogInterface;
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import android.content.Intent;
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import android.support.v7.app.AlertDialog;
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import android.support.v7.app.AppCompatActivity;
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import android.os.Bundle;
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import android.util.Log;
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import android.view.Menu;
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import android.view.MenuInflater;
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import android.view.MenuItem;
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import android.view.View;
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import android.widget.AbsListView;
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import android.widget.AdapterView;
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import android.widget.ArrayAdapter;
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import android.widget.CheckedTextView;
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import android.widget.EditText;
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import android.widget.ListView;
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import android.widget.Toast;
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import com.parse.FindCallback;
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import com.parse.Parse;
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import com.parse.ParseException;
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import com.parse.ParseObject;
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import com.parse.ParseQuery;
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import com.parse.ParseUser;
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import com.parse.SaveCallback;
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import java.util.ArrayList;
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import java.util.List;
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public class Main2Activity extends AppCompatActivity {
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ArrayList<String> users = new ArrayList<>();
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ArrayAdapter arrayAdapter;
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@Override
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public boolean onCreateOptionsMenu(Menu menu) {
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MenuInflater menuInflater = new MenuInflater(this);
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menuInflater.inflate(R.menu.tweet_menu, menu);
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return super.onCreateOptionsMenu(menu);
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}
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@Override
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public boolean onOptionsItemSelected(MenuItem item) {
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if (item.getItemId() == R.id.tweet) {
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AlertDialog.Builder builder = new AlertDialog.Builder(this);
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builder.setTitle("Send a tweet");
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final EditText tweetContentEditText = new EditText(this);
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builder.setView(tweetContentEditText);
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builder.setPositiveButton("Send", new DialogInterface.OnClickListener() {
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@Override
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public void onClick(DialogInterface dialogInterface, int i) {
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Log.i("Info", tweetContentEditText.getText().toString());
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ParseObject tweet = new ParseObject("Tweet");
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tweet.put("username", ParseUser.getCurrentUser().getUsername());
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tweet.put("tweet", tweetContentEditText.getText().toString());
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tweet.saveInBackground(new SaveCallback() {
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@Override
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public void done(ParseException e) {
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if (e == null) {
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Toast.makeText(Main2Activity.this, "Tweet sent succesfully!", Toast.LENGTH_SHORT).show();
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} else {
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Toast.makeText(Main2Activity.this, "Tweet failed - please try again later.", Toast.LENGTH_SHORT).show();
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}
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}
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});
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}
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});
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builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
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@Override
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public void onClick(DialogInterface dialogInterface, int i) {
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dialogInterface.cancel();
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}
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});
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builder.show();
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} else if (item.getItemId() == R.id.logout) {
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ParseUser.logOut();
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Intent intent = new Intent(getApplicationContext(), MainActivity.class);
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startActivity(intent);
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} else if (item.getItemId() == R.id.viewFeed) {
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Intent intent = new Intent(getApplicationContext(), Feed.class);
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startActivity(intent);
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}
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return super.onOptionsItemSelected(item);
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}
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_main2);
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setTitle("User List");
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if (ParseUser.getCurrentUser().get("isFollowing") == null) {
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List<String> emptyList = new ArrayList<>();
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ParseUser.getCurrentUser().put("isFollowing", emptyList);
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}
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final ListView listView = (ListView) findViewById(R.id.listView);
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listView.setChoiceMode(AbsListView.CHOICE_MODE_MULTIPLE);
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arrayAdapter = new ArrayAdapter(this, android.R.layout.simple_list_item_checked, users);
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listView.setAdapter(arrayAdapter);
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listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
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@Override
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public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
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CheckedTextView checkedTextView = (CheckedTextView) view;
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if (checkedTextView.isChecked()) {
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Log.i("Info", "Row is checked.");
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// ParseUser.getCurrentUser().getList("isFollowing").add(users.get(i));
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ParseUser.getCurrentUser().add("isFollowing", users.get(i));
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ParseUser.getCurrentUser().saveInBackground();
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} else {
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Log.i("Info", "Row is not checked.");
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// ParseUser.getCurrentUser().getList("isFollowing").remove(users.get(i));
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ParseUser.getCurrentUser().getList("isFollowing").remove(users.get(i));
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List newlist = ParseUser.getCurrentUser().getList("isFollowing");
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ParseUser.getCurrentUser().remove("isFollowing");
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ParseUser.getCurrentUser().put("isFollowing", newlist);
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ParseUser.getCurrentUser().saveInBackground();
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}
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}
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});
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users.clear();
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ParseQuery<ParseUser> query = ParseUser.getQuery();
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query.whereNotEqualTo("username", ParseUser.getCurrentUser().getUsername());
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query.findInBackground(new FindCallback<ParseUser>() {
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@Override
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public void done(List<ParseUser> objects, ParseException e) {
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if (e == null) {
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if (objects.size() > 0 ) {
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for (ParseUser user : objects) {
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users.add(user.getUsername());
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}
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arrayAdapter.notifyDataSetChanged();
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for (String username : users) {
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if (ParseUser.getCurrentUser().getList("isFollowing").contains(username)) {
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listView.setItemChecked(users.indexOf(username), true);
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}
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}
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}
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}
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}
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});
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}
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}
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