NewTweet.java

package com.tuit.ar.activities;

import java.io.File;
import java.io.FileOutputStream;
import java.util.ArrayList;

import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Bitmap.CompressFormat;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.view.View.OnClickListener;
import android.view.View.OnKeyListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.SeekBar.OnSeekBarChangeListener;

import com.tuit.ar.R;
import com.tuit.ar.api.Twitter;
import com.tuit.ar.api.TwitterAccountRequestsObserver;
import com.tuit.ar.api.TwitterRequest;
import com.tuit.ar.api.request.Options;

public class NewTweet extends Activity implements OnClickListener, TwitterAccountRequestsObserver {
	static private final int MENU_ADD_PHOTO = 0;

	static private final int MAX_CHARS = 140;

	private String replyToTweetId;
	private EditText messageField;
	private TextView charCount;
	private SeekBar imageSize;

	private File photo;

	private Bitmap bm = null;

	private ImageView preview = null;
	private int imageWidth = 0;
	private int imageHeight = 0;
	private float scale = 1.0F;
	private TextView imageSizeWidth;
	private TextView imageSizeHeight;
	private TextView imageSizeMb;
	static private final int MAX_PROGRESS = 10000;
	private Button send;

	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
		setContentView(R.layout.new_tweet);
		send = (Button)findViewById(R.id.send);
		send.setOnClickListener(this);
		Twitter.getInstance().getDefaultAccount().addRequestObserver(this);

		Intent intent = getIntent();
		replyToTweetId = intent.getStringExtra("reply_to_id");
		String replyToUser = intent.getStringExtra("reply_to_username");
		if (replyToUser != null) {
			TextView username = (TextView)findViewById(R.id.replyToUsername);
			username.setText(getString(R.string.inReplyTo).replace("%s", "@" + replyToUser));
		}
		String defaultMessage = intent.getStringExtra("default_text"); 
		messageField = (EditText) findViewById(R.id.tweetMessage);
		charCount = (TextView) findViewById(R.id.charCount);
		if (defaultMessage != null) {
			messageField.setText(defaultMessage);
			charCount.setText(String.valueOf(MAX_CHARS - defaultMessage.length()));
		}

		messageField.setOnKeyListener(new OnKeyListener() {
			public boolean onKey(View v, int keyCode, KeyEvent event) {
				updateCharCount();
				return false;
			}
		});

		imageSize = (SeekBar) findViewById(R.id.imageSize);
		imageSize.setMax(MAX_PROGRESS);
		imageSize.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
			public void onStopTrackingTouch(SeekBar arg0) {
				updateImageSizeKb();
			}
			
			public void onStartTrackingTouch(SeekBar arg0) {
			}
			
			public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
				scale = (float)progress / MAX_PROGRESS;
				imageSizeWidth.setText(getString(R.string.width) + " " + String.valueOf(Math.round(scale * imageWidth)) + "px");
				imageSizeHeight.setText(getString(R.string.height) + " " + String.valueOf(Math.round(scale * imageHeight)) + "px");
				imageSizeMb.setText(getString(R.string.loading));
			}
		});
		imageSizeHeight = (TextView) findViewById(R.id.imageSizeHeight);
		imageSizeWidth = (TextView) findViewById(R.id.imageSizeWidth);
		imageSizeMb = (TextView) findViewById(R.id.imageSizeMb);
		preview = (ImageView)findViewById(R.id.preview);
		imageSizeMb.setText("");

		imageSize.setVisibility(View.INVISIBLE);
		imageSizeHeight.setVisibility(View.INVISIBLE);
		imageSizeWidth.setVisibility(View.INVISIBLE);
	}

	protected void updateImageSizeKb() {
		imageSizeMb.setText(getString(R.string.loading));
		try {
			createImage();
			imageSizeMb.setText((photo.length() / 1024) + "KB");
		} catch (Exception e) {
			
		}
	}

	public boolean onCreateOptionsMenu(Menu menu) {
		menu.add(0, MENU_ADD_PHOTO, 0, R.string.addPhoto);
		return true;
	}

	public boolean onOptionsItemSelected(MenuItem item) {  
	    switch (item.getItemId()) {  
	    case MENU_ADD_PHOTO:
	    {
            startActivityForResult(new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI), 0);
	    	break;
	    }
	    }
	    return true;
    }
	    
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		super.onActivityResult(requestCode, resultCode, data);
		try {
			if (resultCode == Activity.RESULT_OK) {
				bm = MediaStore.Images.Media.getBitmap(getContentResolver(), data.getData());
				preview.setImageBitmap(bm);
				imageWidth = bm.getWidth();
				imageHeight = bm.getHeight();
				imageSize.setVisibility(View.VISIBLE);
				imageSizeHeight.setVisibility(View.VISIBLE);
				imageSizeWidth.setVisibility(View.VISIBLE);
				imageSize.setProgress(MAX_PROGRESS);
				updateImageSizeKb();
			}
		} catch (Exception e) {
			Toast.makeText(this, getString(R.string.unableToUpload), Toast.LENGTH_LONG).show();
		}
	}

	private void updateCharCount() {
		charCount.setText(String.valueOf(MAX_CHARS - messageField.getText().toString().length()));
	}

	protected void createImage() throws Exception {
		FileOutputStream fos;
		// FIXME: not using temporary files?
		fos = super.openFileOutput("upload.jpg", MODE_WORLD_READABLE);
		Bitmap bm;
		if (scale < 1.0)
			bm = Bitmap.createScaledBitmap(this.bm, Math.round(scale * imageWidth), Math.round(scale * imageHeight), true);
		else
			bm = this.bm;
		bm.compress(CompressFormat.JPEG, 75, fos);

		fos.flush();
		fos.close();

		photo = new File("/data/data/com.tuit.ar/files", "upload.jpg");
	}

	public void onClick(View v) {
		String message = messageField.getText().toString();
		try {
			if (this.bm != null) {
				createImage();
				Twitter.getInstance().getDefaultAccount().upload(photo, message);
			} else {
				ArrayList<NameValuePair> params = new ArrayList<NameValuePair>();
				params.add(new BasicNameValuePair("status", message));
				if (replyToTweetId != null) params.add(new BasicNameValuePair("in_reply_to_status_id", replyToTweetId));
				int method = TwitterRequest.METHOD_POST;
				Twitter.getInstance().getDefaultAccount().requestUrl(Options.POST_TWEET, params, method);
			}
		} catch (Exception e) {
			sendFailed(e.getLocalizedMessage());
		}
	}
	public void sendFailed(String message) {
		if (message == null)
			Toast.makeText(this, getString(R.string.unableToPost), Toast.LENGTH_SHORT).show();
		else
			Toast.makeText(this, getString(R.string.unableToPost) + " (" + message + ")", Toast.LENGTH_SHORT).show();
	}

	public void requestHasStarted(TwitterRequest request) {
		setProgressBarIndeterminateVisibility(true);
	}

	public void requestHasFinished(TwitterRequest request) {
		setProgressBarIndeterminateVisibility(false);
    	if (request.getUrl().equals(Options.POST_TWEET) || request.getUrl().equals(Options.POST_TWEET_WITH_PHOTO)) {
    		if (request.getStatusCode() >= 200 && request.getStatusCode() < 400) {
    			Toast.makeText(this, getString(R.string.messageSent), Toast.LENGTH_SHORT).show();
    			finish();
    			try {
    				Twitter.getInstance().getDefaultAccount().requestUrl(Options.FRIENDS_TIMELINE);
    			} catch (Exception e) {}
    		}
    		else sendFailed(request.getErrorMessage());
    	}
	}

	public void onDestroy() {
		super.onDestroy();
		Twitter.getInstance().getDefaultAccount().removeRequestObserver(this);
		send.setOnClickListener(null);
		messageField.setOnKeyListener(null);
		imageSize.setOnSeekBarChangeListener(null);
		if (photo != null) photo.delete();
	}
}