com.springsource.greenhouse.twitter.PostTweetActivity.java Source code

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Here is the source code for com.springsource.greenhouse.twitter.PostTweetActivity.java

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/*
 * Copyright 2011 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.springsource.greenhouse.twitter;

import org.springframework.http.HttpStatus;
import org.springframework.social.greenhouse.api.Event;
import org.springframework.social.greenhouse.api.EventSession;
import org.springframework.web.client.HttpClientErrorException;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.View;
import android.view.inputmethod.InputMethodManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import com.springsource.greenhouse.AbstractGreenhouseActivity;
import com.springsource.greenhouse.R;

/**
 * @author Roy Clarkson
 */
public class PostTweetActivity extends AbstractGreenhouseActivity {

    protected static final String TAG = PostTweetActivity.class.getSimpleName();

    private static final int MAX_TWEET_LENGTH = 140;

    private TextWatcher textWatcher;

    private TextView textViewCount;

    private Event event;

    private EventSession session;

    //***************************************
    // Activity methods
    //***************************************
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.post_tweet);

        textViewCount = (TextView) this.findViewById(R.id.post_tweet_count);
        textWatcher = new TextWatcher() {
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
            }

            public void onTextChanged(CharSequence s, int start, int before, int count) {
                textViewCount.setText(String.valueOf(MAX_TWEET_LENGTH - s.length()));
            }

            public void afterTextChanged(Editable s) {
            }
        };

        final EditText editText = (EditText) findViewById(R.id.post_tweet_text);
        editText.addTextChangedListener(textWatcher);

        final Button button = (Button) findViewById(R.id.post_tweet_button);
        button.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                // hide the soft keypad
                InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(
                        Context.INPUT_METHOD_SERVICE);
                EditText editText = (EditText) findViewById(R.id.post_tweet_text);
                inputMethodManager.hideSoftInputFromWindow(editText.getWindowToken(), 0);
                new PostTweetTask().execute();
            }
        });
    }

    @Override
    public void onStart() {
        super.onStart();
        event = getApplicationContext().getSelectedEvent();
        session = getApplicationContext().getSelectedSession();

        if (event == null) {
            return;
        }

        final EditText editText = (EditText) findViewById(R.id.post_tweet_text);
        String tweetText = null;
        String hashtag = session == null ? event.getHashtag() : event.getHashtag() + " " + session.getHashtag();

        if (getIntent().hasExtra("reply")) {
            tweetText = new StringBuilder().append("@").append(getIntent().getStringExtra("reply")).append(" ")
                    .append(hashtag).toString();
        } else if (getIntent().hasExtra("quote")) {
            tweetText = getIntent().getStringExtra("quote");
        } else {
            tweetText = hashtag;
        }

        editText.setText(tweetText);
    }

    //***************************************
    // Private methods
    //***************************************
    private void showResult(String result) {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setMessage(result);
        builder.setCancelable(false);
        builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int id) {
                dialog.cancel();
            }
        });
        AlertDialog alert = builder.create();
        alert.show();
    }

    //***************************************
    // Private classes
    //***************************************
    private class PostTweetTask extends AsyncTask<Void, Void, String> {
        private String status;

        @Override
        protected void onPreExecute() {
            showProgressDialog("Posting Tweet...");
            EditText editText = (EditText) findViewById(R.id.post_tweet_text);
            status = editText.getText().toString();
        }

        @Override
        protected String doInBackground(Void... params) {
            try {
                if (session != null) {
                    getApplicationContext().getGreenhouseApi().tweetOperations()
                            .postTweetForEventSession(event.getId(), session.getId(), status);
                    return "Thank you for tweeting about this session!";
                } else {
                    getApplicationContext().getGreenhouseApi().tweetOperations().postTweetForEvent(event.getId(),
                            status);
                    return "Thank you for tweeting about this event!";
                }
            } catch (HttpClientErrorException e) {
                if (e.getStatusCode() == HttpStatus.PRECONDITION_FAILED) {
                    return "Your account is not connected to Twitter. Please sign in to greenhouse.springsource.org to connect.";
                } else {
                    Log.e(TAG, e.getLocalizedMessage(), e);
                    return "A problem occurred while posting to Twitter. Please verify your account is connected at greenhouse.springsource.org.";
                }
            } catch (Exception e) {
                Log.e(TAG, e.getLocalizedMessage(), e);
                return "A problem occurred while posting to Twitter. Please verify your account is connected at greenhouse.springsource.org.";
            }
        }

        @Override
        protected void onPostExecute(String result) {
            dismissProgressDialog();
            showResult(result);
        }
    }

}