Question

并尝试使用sinch和parse创建一个聊天应用程序，按照教程并查看搜索教程中的github代码。我的问题是显示了用户，但加载页面仍然永远显示。这是我的班级： ListUserActivity.java

import android.support.v4.content.LocalBroadcastManager;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;

import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;

import com.parse.FindCallback;
import com.parse.Parse;
import com.parse.ParseException;
import com.parse.ParseQuery;
import com.parse.ParseUser;

import java.util.ArrayList;
import java.util.List;


public class ListUsersActivity extends ActionBarActivity {

    private String currentUserId;
    private ArrayAdapter<String> namesArrayAdapter;
    private ArrayList<String> names;
    private ListView usersListView;
    private Button logoutButton;
    private ProgressDialog progressDialog;
    private BroadcastReceiver receiver = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_list_users);

        showSpinner();
        Log.v("ListUserActivity", ParseUser.getCurrentUser().toString());
        logoutButton = (Button) findViewById(R.id.logoutButton);
        logoutButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                stopService(new Intent(getApplicationContext(), MessageService.class));
                ParseUser.logOut();
                Intent intent = new Intent(getApplicationContext(), ChatActivity.class);
                startActivity(intent);
            }
        });

    }
    //display clickable a list of all users
    private void setConversationsList() {
        currentUserId = ParseUser.getCurrentUser().getObjectId();
        names = new ArrayList<String>();

        ParseQuery<ParseUser> query = ParseUser.getQuery();
        query.whereNotEqualTo("objectId", currentUserId);
        query.findInBackground(new FindCallback<ParseUser>() {
            public void done(List<ParseUser> userList, com.parse.ParseException e) {
                if (e == null) {
                    for (int i = 0; i < userList.size(); i++) {
                        names.add(userList.get(i).getUsername().toString());
                    }

                    usersListView = (ListView) findViewById(R.id.usersListView);
                    namesArrayAdapter =
                            new ArrayAdapter<String>(getApplicationContext(),
                                    R.layout.user_list_item, names);
                    usersListView.setAdapter(namesArrayAdapter);

                    usersListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                        @Override
                        public void onItemClick(AdapterView<?> a, View v, int i, long l) {
                            openConversation(names, i);
                        }
                    });

                } else {
                    Toast.makeText(getApplicationContext(),
                            "Error loading user list",
                            Toast.LENGTH_LONG).show();
                }
            }
        });
    }


    //open a conversation with one person
    public void openConversation(ArrayList<String> names, int pos) {
        ParseQuery<ParseUser> query = ParseUser.getQuery();
        query.whereEqualTo("username", names.get(pos));
        query.findInBackground(new FindCallback<ParseUser>() {
            public void done(List<ParseUser> user, com.parse.ParseException e) {
                if (e == null) {
                    Intent intent = new Intent(getApplicationContext(), MensajeriaActivity.class);
                    intent.putExtra("RECIPIENT_ID", user.get(0).getObjectId());
                    startActivity(intent);
                } else {
                    Toast.makeText(getApplicationContext(),
                            getString(R.string.error_find_user),
                            Toast.LENGTH_SHORT).show();
                }
            }
        });
    }
    //show a loading spinner while the sinch client starts
    private void showSpinner() {
        progressDialog = new ProgressDialog(this);
        progressDialog.setTitle(getString(R.string.progress_dialog));
        progressDialog.setMessage(getString(R.string.progress_dialog_message));
        progressDialog.show();

        receiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                Boolean success = intent.getBooleanExtra("success", false);

                progressDialog.dismiss();
                if (!success) {
                    Toast.makeText(getApplicationContext(), getString(R.string.error_list_users), Toast.LENGTH_LONG).show();
                }
            }
        };

        LocalBroadcastManager.getInstance(this).registerReceiver(receiver, new IntentFilter("com.example.paul.mapasxavo.ListUsersActivity"));
        Log.v("ShowSpinner-OnReceive", getIntent().toString());
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_list_users, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }


    @Override
    public void onResume() {
        setConversationsList();
        super.onResume();
    }

}

progressDialog.dismiss（）永远不会启动，我做错了什么？

Answer 1

这也可能发生，因为广播意图是在注册broadcastReceiver之前发送的。因此，垃圾收集器删除了intent，然后BroadcastReceiver没有收到任何内容，并且微调器无限期地加载。

要解决此问题，应在LoginActivity中的MessageService之前启动ListUsersActivity：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    intent = new Intent(getApplicationContext(), ListUsersActivity.class);
    serviceIntent = new Intent(getApplicationContext(), MessageService.class);

    ParseUser currentUser = ParseUser.getCurrentUser();
    if (currentUser != null) {
        startActivity(intent);
        startService(serviceIntent);
    }

    setContentView(R.layout.activity_login);

    loginButton = (Button) findViewById(R.id.loginButton);
    signUpButton = (Button) findViewById(R.id.signupButton);
    usernameField = (EditText) findViewById(R.id.loginUsername);
    passwordField = (EditText) findViewById(R.id.loginPassword);

    loginButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            username = usernameField.getText().toString();
            password = passwordField.getText().toString();

            ParseUser.logInInBackground(username, password, new LogInCallback() {
                public void done(ParseUser user, ParseException e) {
                    if (user != null) {
                        startActivity(intent);
                        startService(serviceIntent);
                    } else {
                        Toast.makeText(getApplicationContext(),
                            "Wrong username/password combo",
                                Toast.LENGTH_LONG).show();
                    }
                }
            });
        }
    });

    signUpButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            username = usernameField.getText().toString();
            password = passwordField.getText().toString();

            ParseUser user = new ParseUser();
            user.setUsername(username);
            user.setPassword(password);

            user.signUpInBackground(new SignUpCallback() {
                public void done(ParseException e) {
                    if (e == null) {
                        startActivity(intent);
                        startService(serviceIntent);
                    } else {
                        Toast.makeText(getApplicationContext(),
                            "There was an error signing up."
                                , Toast.LENGTH_LONG).show();
                    }
                }
            });
        }
    });
}

Answer 2

我解决了，问题是我的manifest.xml没有服务：

{{1}}

现在它有效，对不起有问题

sinch教程showspinner（）问题

2 个答案: