Hello,
Recently I started working on bluetooth chat app for my final year project. I took the example coding available in the sample app in Eclipse and trying to improve it. Now I'm trying to insert 2 new functions into it, 1 - the upload button for uploading any files, 2 - bubble chat interface.
I am a beginner at android programming. I tried exploring draw 9 patch for the bubble patch. Somehow I get the bubble chat done, but not perfectly. I can make it send & receive with the same bubble style. What I'm trying to do is, receive message will show in Green bubble while send message will show Yellow Bubble. I tried the getView() method but didn't understand any of it.
As for the upload button, I'm having problem at the uploading part. I get the selecting the file part done, but I don't know how to make it automatically send the file after it being selected. I tried Googling and most of the result show Image upload. Thanks for those image upload tutorial, I get as far as choosing the file. As for uploading it(sending the file to the other paired device), I'm completely clueless...
The part that I'm having problem I highlight it with red color.
Here's my coding(technically it isn't my coding, it the sample coding with minor modification):
package com.example.android.BluetoothChat;
import android.annotation.TargetApi;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.view.View.OnClickListener;
import android.view.inputmethod.EditorInfo;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.SimpleAdapter.ViewBinder;
import android.widget.TextView;
import android.widget.Toast;
/**
* This is the main Activity that displays the current chat session.
*/
@TargetApi(Build.VERSION_CODES.ECLAIR)
public class BluetoothChat extends Activity {
// Debugging
private static final String TAG = "BluetoothChat";
private static final boolean D = true;
// Message types sent from the BluetoothChatService Handler
public static final int MESSAGE_STATE_CHANGE = 1;
public static final int MESSAGE_READ = 2;
public static final int MESSAGE_WRITE = 3;
public static final int MESSAGE_DEVICE_NAME = 4;
public static final int MESSAGE_TOAST = 5;
// Key names received from the BluetoothChatService Handler
public static final String DEVICE_NAME = "device_name";
public static final String TOAST = "toast";
// Intent request codes
private static final int REQUEST_CONNECT_DEVICE_SECURE = 1;
private static final int REQUEST_CONNECT_DEVICE_INSECURE = 2;
private static final int REQUEST_ENABLE_BT = 3;
// Layout Views
private TextView mTitle;
private ListView mConversationView;
private EditText mOutEditText;
private Button mSendButton;
private Button mUploadButton;
// Name of the connected device
private String mConnectedDeviceName = null;
// Array adapter for the conversation thread
private ArrayAdapter<String> mConversationArrayAdapter;
// String buffer for outgoing messages
private StringBuffer mOutStringBuffer;
// Local Bluetooth adapter
private BluetoothAdapter mBluetoothAdapter = null;
// Member object for the chat services
private BluetoothChatService mChatService = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if(D) Log.e(TAG, "+++ ON CREATE +++");
// Set up the window layout
requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
setContentView(R.layout.main);
getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.custom_title);
// Set up the custom title
mTitle = (TextView) findViewById(R.id.title_left_text);
mTitle.setText(R.string.app_name);
mTitle = (TextView) findViewById(R.id.title_right_text);
// Get local Bluetooth adapter
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
// If the adapter is null, then Bluetooth is not supported
if (mBluetoothAdapter == null) {
Toast.makeText(this, "Bluetooth is not available", Toast.LENGTH_LONG).show();
finish();
return;
}
}
@Override
public void onStart() {
super.onStart();
if(D) Log.e(TAG, "++ ON START ++");
// If BT is not on, request that it be enabled.
// setupChat() will then be called during onActivityResult
if (!mBluetoothAdapter.isEnabled()) {
Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableIntent, REQUEST_ENABLE_BT);
// Otherwise, setup the chat session
} else {
if (mChatService == null) setupChat();
}
}
@Override
public synchronized void onResume() {
super.onResume();
if(D) Log.e(TAG, "+ ON RESUME +");
// Performing this check in onResume() covers the case in which BT was
// not enabled during onStart(), so we were paused to enable it...
// onResume() will be called when ACTION_REQUEST_ENABLE activity returns.
if (mChatService != null) {
// Only if the state is STATE_NONE, do we know that we haven't started already
if (mChatService.getState() == BluetoothChatService.STATE_NONE) {
// Start the Bluetooth chat services
mChatService.start();
}
}
}
private void setupChat() {
Log.d(TAG, "setupChat()");
// Initialize the array adapter for the conversation thread
mConversationArrayAdapter = new ArrayAdapter<String>(this, R.layout.message);
mConversationView = (ListView) findViewById(R.id.in);
mConversationView.setAdapter(mConversationArrayAdapter);
// Initialize the compose field with a listener for the return key
mOutEditText = (EditText) findViewById(R.id.edit_text_out);
mOutEditText.setOnEditorActionListener(mWriteListener);
// Initialize the send button with a listener that for click events
mSendButton = (Button) findViewById(R.id.button_send);
mSendButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// Send a message using content of the edit text widget
TextView view = (TextView) findViewById(R.id.edit_text_out);
String message = view.getText().toString();
sendMessage(message);
}
});
mUploadButton = (Button) findViewById (R.id.upload_button);
mUploadButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
//when upload button is clicked, choose a file
Intent intent = new Intent();
intent.setType("*/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select File"),1);
}
});
// Initialize the BluetoothChatService to perform bluetooth connections
mChatService = new BluetoothChatService(this, mHandler);
// Initialize the buffer for outgoing messages
mOutStringBuffer = new StringBuffer("");
}
@Override
public synchronized void onPause() {
super.onPause();
if(D) Log.e(TAG, "- ON PAUSE -");
}
@Override
public void onStop() {
super.onStop();
if(D) Log.e(TAG, "-- ON STOP --");
}
@Override
public void onDestroy() {
super.onDestroy();
// Stop the Bluetooth chat services
if (mChatService != null) mChatService.stop();
if(D) Log.e(TAG, "--- ON DESTROY ---");
}
private void ensureDiscoverable() {
if(D) Log.d(TAG, "ensure discoverable");
if (mBluetoothAdapter.getScanMode() !=
BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE) {
Intent discoverableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
discoverableIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 300);
startActivity(discoverableIntent);
}
}
/**
* Sends a message.
* @param message A string of text to send.
*/
private void sendMessage(String message) {
// Check that we're actually connected before trying anything
if (mChatService.getState() != BluetoothChatService.STATE_CONNECTED) {
Toast.makeText(this, R.string.not_connected, Toast.LENGTH_SHORT).show();
return;
}
// Check that there's actually something to send
if (message.length() > 0) {
// Get the message bytes and tell the BluetoothChatService to write
byte[] send = message.getBytes();
mChatService.write(send);
// Reset out string buffer to zero and clear the edit text field
mOutStringBuffer.setLength(0);
mOutEditText.setText(mOutStringBuffer);
}
}
// The action listener for the EditText widget, to listen for the return key
private TextView.OnEditorActionListener mWriteListener =
new TextView.OnEditorActionListener() {
public boolean onEditorAction(TextView view, int actionId, KeyEvent event) {
// If the action is a key-up event on the return key, send the message
if (actionId == EditorInfo.IME_NULL && event.getAction() == KeyEvent.ACTION_UP) {
String message = view.getText().toString();
sendMessage(message);
}
if(D) Log.i(TAG, "END onEditorAction");
return true;
}
};
// The Handler that gets information back from the BluetoothChatService
private final Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case MESSAGE_STATE_CHANGE:
if(D) Log.i(TAG, "MESSAGE_STATE_CHANGE: " + msg.arg1);
switch (msg.arg1) {
case BluetoothChatService.STATE_CONNECTED:
mTitle.setText(R.string.title_connected_to);
mTitle.append(mConnectedDeviceName);
mConversationArrayAdapter.clear();
break;
case BluetoothChatService.STATE_CONNECTING:
mTitle.setText(R.string.title_connecting);
break;
case BluetoothChatService.STATE_LISTEN:
case BluetoothChatService.STATE_NONE:
mTitle.setText(R.string.title_not_connected);
break;
}
break;
case MESSAGE_WRITE:
byte[] writeBuf = (byte[]) msg.obj;
// construct a string from the buffer
String writeMessage = new String(writeBuf);
mConversationArrayAdapter.add("Me: " + writeMessage);
break;
case MESSAGE_READ:
byte[] readBuf = (byte[]) msg.obj;
// construct a string from the valid bytes in the buffer
String readMessage = new String(readBuf, 0, msg.arg1);
mConversationArrayAdapter.add(mConnectedDeviceName+": " + readMessage);
break;
case MESSAGE_DEVICE_NAME:
// save the connected device's name
mConnectedDeviceName = msg.getData().getString(DEVICE_NAME);
Toast.makeText(getApplicationContext(), "Connected to "
+ mConnectedDeviceName, Toast.LENGTH_SHORT).show();
break;
case MESSAGE_TOAST:
Toast.makeText(getApplicationContext(), msg.getData().getString(TOAST),
Toast.LENGTH_SHORT).show();
break;
}
}
};
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if(D) Log.d(TAG, "onActivityResult " + resultCode);
switch (requestCode) {
case REQUEST_CONNECT_DEVICE_SECURE:
// When DeviceListActivity returns with a device to connect
if (resultCode == Activity.RESULT_OK) {
connectDevice(data, true);
}
break;
case REQUEST_CONNECT_DEVICE_INSECURE:
// When DeviceListActivity returns with a device to connect
if (resultCode == Activity.RESULT_OK) {
connectDevice(data, false);
}
break;
case REQUEST_ENABLE_BT:
// When the request to enable Bluetooth returns
if (resultCode == Activity.RESULT_OK) {
// Bluetooth is now enabled, so set up a chat session
setupChat();
} else {
// User did not enable Bluetooth or an error occured
Log.d(TAG, "BT not enabled");
Toast.makeText(this, R.string.bt_not_enabled_leaving, Toast.LENGTH_SHORT).show();
finish();
}
}
}
private void connectDevice(Intent data, boolean secure) {
// Get the device MAC address
String address = data.getExtras()
.getString(DeviceListActivity.EXTRA_DEVICE_ADDRESS);
// Get the BLuetoothDevice object
BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
// Attempt to connect to the device
mChatService.connect(device, secure);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.option_menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
Intent serverIntent = null;
switch (item.getItemId()) {
case R.id.secure_connect_scan:
// Launch the DeviceListActivity to see devices and do scan
serverIntent = new Intent(this, DeviceListActivity.class);
startActivityForResult(serverIntent, REQUEST_CONNECT_DEVICE_SECURE);
return true;
case R.id.discoverable:
// Ensure this device is discoverable by others
ensureDiscoverable();
return true;
}
return false;
}
}
accessing bluetoothchat with a single button
i am using bluetooth chat program in my project to send the command from android phone to hc06 bluetooth which is connected to arduino.bluetooth chat program is available in eclipse sample program, now i want to access this program through a single button ,can anybody help me out in this how should i do this , please tell me stepwise first we have to create which activity and then which i am very confused in this
ash124 said:
i am using bluetooth chat program in my project to send the command from android phone to hc06 bluetooth which is connected to arduino.bluetooth chat program is available in eclipse sample program, now i want to access this program through a single button ,can anybody help me out in this how should i do this , please tell me stepwise first we have to create which activity and then which i am very confused in this
Click to expand...
Click to collapse
I'm not sure how to code for arduino. But the part how to access through a button click, i have an idea about that.
you can just open a sample bluetooth chat in eclipse, but instead of set the page auto open. just create a new main page, and add a button then, just "hyperlink" it to the bluetoothchat.
to navigate between pages using a button, i'm sure there's tons of tutorial available in google or you can just search "cornboyz" in youtube. that the best tutorial i followed back when i'm still doing android programming. I can't help you much in coding. but i know where you're getting at. Its been 2 years, last i explore android programming.
so. sorry
kuronatsu said:
I'm not sure how to code for arduino. But the part how to access through a button click, i have an idea about that.
you can just open a sample bluetooth chat in eclipse, but instead of set the page auto open. just create a new main page, and add a button then, just "hyperlink" it to the bluetoothchat.
to navigate between pages using a button, i'm sure there's tons of tutorial available in google or you can just search "cornboyz" in youtube. that the best tutorial i followed back when i'm still doing android programming. I can't help you much in coding. but i know where you're getting at. Its been 2 years, last i explore android programming.
so. sorry
Click to expand...
Click to collapse
thanks kuronatsu for your help
I have some code to create an album on Facebook when a Button is clicked.
I have tried (and failed) to work out why this is happening. I have a feeling it is something to so with the fact the call is async, and something to do with callbacks. But I can't find any solid information on this.
I thought that the request in the code might be getting called when the session state changed, so that is why I check that the Session is Open, and that the Sessionstate is OPENED.
So an enlightened soul look at the code below and let me know why this is happening?
Code:
public void createNewAlbum(String albumName) {
Session session = Session.getActiveSession();
if (session.isOpened()) {
SessionState state = session.getState();
//if (state.isOpened()) {
Bundle params = new Bundle();
params.putString("name", albumName);
Request.Callback callback = new Request.Callback() {
[user=439709]@override[/user]
public void onCompleted(Response response) {
//need to get the newly created album ID.
try
{
JSONObject graphResponse =response.getGraphObject().getInnerJSONObject();
try
{
albID = graphResponse.getString("id");
//commenting the upload method call as two albums are being created
//and multiple uploads are occurring too
//UploadToAlbum(Session.getActiveSession(), albID);
}
catch (JSONException e)
{
Log.d( "JSON error "+ e.getMessage(), albID );
albID =null;
}
}
catch (Exception e) {
e.printStackTrace();
albID = null;
}
}
};
if (state.isOpened()) { // only call the request is the Session state is OPENED
Request request = new Request(session, "me/albums",params, HttpMethod.POST,callback);
request.executeAsync();
}//end state session is opened
}//end session if
}
Any Java experts able to help out?
Following the Google documentation I create an app that insert new events to the user's calendar.
In the following code you can see how I did it.
MakeRequastTask.class
Code:
/**
* An asynchronous task that handles the Google Calendar API call.
* Placing the API calls in their own task ensures the UI stays responsive.
*/
private class MakeRequestTask extends AsyncTask<Void, Void, String[][]> {
private com.google.api.services.calendar.Calendar mServiceCalendar = null;
private Exception mLastError = null;
private String[][] tempArray;
private SpreadSheet mSheet;
MakeRequestTask(GoogleAccountCredential credential, SpreadSheet mSheet) {
this.mSheet = mSheet;
tempArray = new String[7][2];
HttpTransport transport = AndroidHttp.newCompatibleTransport();
JsonFactory jsonFactory = JacksonFactory.getDefaultInstance();
mServiceCalendar = new com.google.api.services.calendar.Calendar.Builder(
transport, jsonFactory, credential)
.setApplicationName("Bank Of Israel")
.build();
}
/**
* Background task to call Google Calendar API.
* @param params no parameters needed for this task.
*/
@Override
protected String[][] doInBackground(Void... params) {
try {
setDataInCalendar();
} catch (Exception e) {
mLastError = e;
cancel(true);
return null;
}
return null;
}
//--- Google Calendar ---\\
private void setDataInCalendar() throws IOException {
Vector<Shift> temp = mSheet.getShifts();
for(Shift s: temp) {
Event e = createEvent(s);
String calendarId = userEmailAddress;
e = mServiceCalendar.events().insert(calendarId, e).execute();
Log.d("MyApp", "Event created: " + e.getHtmlLink());
}
}
private Event createEvent(Shift mShift) {
final String TimeOffSet = "-07:00";
Event event = new Event();
event.setSummary(mShift.getShiftName());//type
//set Date, Start & End Times
SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd");
//make a String for the DateTime Object
//format as: "yyyy-MM-ddTHH:mm:ss+UTCOffSet"
String startTimeUTC = sd.format(mShift.getShiftDate()) +"T"+
mShift.getStartTime().toString() + TimeOffSet ;
DateTime startDateTime = new DateTime(startTimeUTC);
EventDateTime start = new EventDateTime()
.setDateTime(startDateTime);
event.setStart(start);
String endTimeUTC;
//if the shift is C or C1 the end of the shift is in the next day
if (mShift.getShiftName().equals("c1")
||
mShift.getShiftName().equals("c")){
endTimeUTC = sd.format(PatternTest.oneDayForeword(mShift.getShiftDate())) +"T"+
mShift.getEndTime().toString()+ TimeOffSet;
}
else{
endTimeUTC = sd.format(mShift.getShiftDate()) +"T"+
mShift.getEndTime().toString() + IsraelTimeOffSet;
}
DateTime endDateTime = new DateTime(endTimeUTC);
EventDateTime end = new EventDateTime()
.setDateTime(endDateTime);
event.setEnd(end);
event.setColorId("10");
return event;
}
//------------------------------------------------------------------------------------\\
@Override
protected void onPreExecute() {
super.onPreExecute();
showProgressDialog();
}
@Override
protected void onPostExecute(String[][] strings) {
super.onPostExecute(strings);
hideProgressDialog();
Toast.makeText(SheetActivity.this, "Finish!", Toast.LENGTH_LONG).show();
}
}
@Override
protected void onCancelled() {
hideProgressDialog();
if (mLastError != null) {
if (mLastError instanceof GooglePlayServicesAvailabilityIOException) {
showGooglePlayServicesAvailabilityErrorDialog(
((GooglePlayServicesAvailabilityIOException) mLastError)
.getConnectionStatusCode());
} else if (mLastError instanceof UserRecoverableAuthIOException) {
startActivityForResult(
((UserRecoverableAuthIOException) mLastError).getIntent(),
SheetActivity.REQUEST_AUTHORIZATION);
}
else if (mLastError instanceof NoShiftsInFileException){
Toast.makeText(SheetActivity.this, mLastError.getMessage() , Toast.LENGTH_SHORT).show();
}
else if (mLastError instanceof NoUserNameException){
Toast.makeText(SheetActivity.this, mLastError.getMessage() , Toast.LENGTH_LONG).show();
finish();//go back to the SignIn Activity
}
else {
Toast.makeText(SheetActivity.this, "The following error occurred:\n"
+ mLastError.getMessage(), Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(SheetActivity.this, "Request cancelled." , Toast.LENGTH_SHORT).show();
}
}
}
My problem is that after my app insert the new events, I can see them in the web Calendar but the Google Calendar App or any other calendar app I use on my smartphone (LG G2) doesn't show the new events (even after refreshing and resyncing), however when I'm inserting a new event using the web page the event sync perfectly with the apps on my phone.
Thank in advenc
HI developers,
sorry for my bad English. I'm German.
i want to save the full-size image of the Camera into a file but my algorithm doesn't create the file. I read many tutorials about saving full-size photo and also threads with similar problems but they didn't work.
Here is my code. Does anyone know where's the problem?
After the file is saved on the internal storage it's copied into the server (XAMPP). When I create the file only with the thumbnail data it works.
Code:
private void makePhotoClick() {
try {
photoFile = new File(getFilesDir(), "test.jpg");
imageURI = Uri.fromFile(photoFile);
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, imageURI);
startActivityForResult(takePictureIntent, 1);
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode,
Intent data) {
if (requestCode == 1 && resultCode == RESULT_OK) {
//Intent i=new Intent(Intent.ACTION_VIEW);
BitmapFactory.decodeFile(photoFile.getAbsolutePath()); // it also returns null
}
}
Print 'photoFile.getAbsolutePath()' on logcat console. Open Android Device Monitor (Tools -> Android -> Android Device Monitor) and check if file was created.
You can check also if file was created programmatically:
Code:
photoFile.exists()
Hello together
since more than 4 Days i stuck on my current app project with the message: "admin componentinfo does not own the profile".
I tried many things - Added an Work Profile programmaticaly - Gave Profile Owner via adb and i dont find the result.
Someone have an Idea, what im doing wrong?
Code to add managed profile:
Java:
private void provisionManagedProfile()
{
Activity activity = this;
if (null == activity) {
return;
}
Intent intent = new Intent(DevicePolicyManager.ACTION_PROVISION_MANAGED_PROFILE);
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
intent.putExtra(
DevicePolicyManager.EXTRA_PROVISIONING_DEVICE_ADMIN_PACKAGE_NAME,
activity.getApplicationContext().getPackageName()
);
} else {
final ComponentName component = new ComponentName(activity,
DeviceAdmin.class.getName());
intent.putExtra(
DevicePolicyManager.EXTRA_PROVISIONING_DEVICE_ADMIN_COMPONENT_NAME,
component
);
}
if (intent.resolveActivity(activity.getPackageManager()) != null) {
startActivityForResult(intent, 1);
Toast.makeText(activity, "Already used!",
Toast.LENGTH_SHORT).show();
activity.finish();
} else {
Toast.makeText(activity, "Device provisioning is not enabled. Stopping.",
Toast.LENGTH_SHORT).show();
}
}
Code to use:
Java:
DevicePolicyManager dpm = (DevicePolicyManager) getApplicationContext().getSystemService(Context.DEVICE_POLICY_SERVICE);
dpm.setProfileEnabled(compName);
compName is:
Java:
compName = new ComponentName(this, DeviceAdmin.class);
#Edit
If i start the manged Profile, its crashed after the end before the "next" button showing.
But if i take an look on my settings its showing that this profile was created.
Greetings