Android Open Source - introToDroid4ed File Stream Of Consciousness Activity

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.introtoandroid.filesoc;
//from   w ww . ja  va2  s.  co m
import java.io.FileOutputStream;


import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class FileStreamOfConsciousnessActivity extends Activity {

  public static final String LOG_FILENAME = "Chat_Log.txt";
  private Handler mHandler = new Handler();

  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.chat);

    // Handle Send Button
    final Button sendButton = (Button) findViewById(R.id.ButtonSend);
    sendButton.setOnClickListener(new View.OnClickListener() {
      public void onClick(View v) {
        logChatMessage();
        final EditText chatText = (EditText) findViewById(R.id.EditTextChat);
        chatText.setText(null);
      }
    });

    // Handle Go to Log button
    final Button gotoLog = (Button) findViewById(R.id.ButtonSeeLog);
    gotoLog.setOnClickListener(new View.OnClickListener() {
      public void onClick(View v) {
        // Go to other activity that displays file contents
        Intent intent = new Intent(FileStreamOfConsciousnessActivity.this,
            ViewLogActivity.class);
        startActivity(intent);
      }
    });
  }
  
  private void logChatMessage() {  
    new Thread(){
      public void run(){
        final EditText chatText = (EditText) findViewById(R.id.EditTextChat);
        String strChat = chatText.getText().toString();

        if (strChat.length() > 0) {
          strChat = strChat+"\n\n";
          try {
            // Open the file
            FileOutputStream fIO = openFileOutput(LOG_FILENAME, MODE_APPEND);
            // Write our chat string
            fIO.write(strChat.getBytes());
            // Close
            fIO.close();
            // Inform the UI thread we're good to go
            mHandler.post(new Runnable() {
              public void run() {
                Toast.makeText(FileStreamOfConsciousnessActivity.this,
                    "Logged Chat Message",
                    Toast.LENGTH_SHORT).show();
              }
            });
          } catch (Exception e) {
            // Append failed. Handle error
          }
        }
      }
    }.start();
  }
}

Java Source Code List

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