Use Bluetooth And Return Values To App?
Dec 29, 2012
I am developing an app that will use bluetooth and return values to an app. I am having some problems using my Arduino (Uno rev3) Development board to send data to the board from my arduino program. I am using a sample code to test with turning on and off an LED. So far I have tested the Arduino code with its serial monitor to send data and it seems that it accepts sending the "D" letter value. I believe it is accepting its command because it is used to its own protocol of bytes or something similar. I am not sure if I am using the correct command to send data from my android to the arduino here is a snippet of the command to send a capital "D" to turn on a LED:
public class LEDtest extends Activity{
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub[code]....
I want to know if there's a command that will change it to to a universal protocol of bytes or if there's something I'm missing.
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Apr 9, 2014
I want to ask where does the defaults values of memory min-free values of a Rom reside? I mean what file I would have to edit to edit those values?
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Jun 27, 2010
If I need to return my phone before the 30 days are up and they are out of stock, will they still honor the return policy and just call you when they have one available or will you have to stick with the phone that you have?
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Mar 13, 2010
I was cleaning all the crap off my phone I don't use anymore and I believe I accidently removed the bluetooth software that allows it to connect to stereo bluetooth headsets. I can control the player with the headset, I can make phone calls from it, but when I try to play music there is no sound.
I was trying to reset the phone using RUU, but it reboots the phone and then says it cannot reconnect after that and the software shuts down. I can still sync with outlook, so my driver is not the issue. I am out of ideas.
Is there anyway possible to reinstall just the bluetooth portion of the rom?
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Sep 17, 2010
Is there any way to turn the bluetooth option on the caller id screen to automatically toggle the bluetooth function on vs rushing to home screen toggle?
I'm often on the road at work or just have my hands full and it is such a drain running bt all day. Is there anything close to what I'm asking available or possible?
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Dec 27, 2013
my problem is this, i have my main class and a second class that displays the values of the accelerometer on a textview.. however if i call my accelerometer class this is what happens, my application starts with no problems however no buttons work from my main class.. it seems to me that the accelerometer class runs above my main class thats why i have this problem.. what i did is i created a new activity on my manifest and called my accelerometer class from my main class using->
Intent i = new Intent(this, AccelerometerClass.class);
startActivity(i);
Maybe there is a way to just take the values from the accelerometer class,wihout calling the class itself ???? what i mean is take the x,y,z(int) values from accelerometer class and set them on a text from the main class..
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Nov 19, 2010
This is my first android phone and im having some problems with the bluetooth. Im trying to send my contacts over bluetooth from my old sony ericsson but it doesnt seem to be going smoothly, i would say its all down to me! Basically i have got the bluetooth on for both phones, the desire is set to be discoverable and i try to send the contacts via bluetooth on the SE. I get the whole passcode and accept the file which i have done, but then it says again about accepting the file. Ive tried it a few times and i have 3 bluetooth icons at the top of my screen now which i imagine are for transferring files which need accepting. Is there anywhere i can to accept them or close them down?
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Apr 16, 2010
I have a collection of strings and declared the strings individually as arrays using ArrayList<String> al=new ArrayList<String>(); and called the arrays in the program by using al=getIntent().getStringArrayListExtra("titles");
Now, instead of declaring each of the arrays i have created SongsArray.java like below...
public class SongsArray {
private String title;
private String movieName;
private String singerName;
private String imagePath;
private String mediaPath;
public String gettitle()
{
return title;
}
public void settitle(String title) {.................
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Jun 24, 2010
I have a string that contains a xml structure and there are two pieces of data in separate tags that I am after.
xpath has been added since API level 8, and with me being stuck with API level 3 (old phone for you ;-)) I need a way to get the data.
Would using a regular expression commit a huge sin? ;-) The xml isn't that big...
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Nov 17, 2010
I want to get the number of launcher:cellWidth in xml:
CODE:.........
I know that I can get it in a Custom view by:
CODE:....................
But how Can I get it in a Activity? not a Custom view.
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Jul 26, 2010
One of the Preferences in my PreferenceActivity needs to get its values from a database. How do I add these values?
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Sep 13, 2010
I am new to android development, My new requirement is find Latitude and longitude for current position where device is present. how I get this.
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Apr 6, 2010
That's a lot of code... no time to read it over now.. but off the top of my head: look into either using a database, an Application class (that will run the whole time your app is alive), or adding extras to the Intent bundle before starting your subactivity. These are all methods to pass data around between activities.
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Jun 11, 2010
Code... I want to get Session Key from here. How to get it.
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Jul 5, 2010
I wanna set a textview as the values from SQLite when I click the ListView Here is my way...
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Nov 30, 2011
I'm building an app which connects to various web services via ksoap2. Most of the services provide some sort of response in the form of a string which I use in the app, however one of the services doesn't actually provide a response to be used it simply takes the inputted vales and the .net service updates the relevant DB tables.Would the set up and call to the service be the same as to the other services that I get information back from? My code is as follows;
SoapObject Request =
new SoapObject(NAMESPACE, METHOD_NAME);
Request.addProperty(
"Sub_Seq",Sub_Seq);
Request.addProperty(
"Start_Time",startDate.toString());
[code]...
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Nov 17, 2010
I have searched and searched and I just can't get this code to work. I have a main.xml layout and a setting.xml. I have some values I would like the Settings.class to change in my main apps class.Three string to be exact. I have tried this simple test code in my main app class.
settings.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
Intent intent = new Intent(v.getContext(), Settings.class);
startActivityForResult(intent, 0);}});
//Then a function
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent){
super.onActivityResult(requestCode, resultCode, intent);
Bundle extras = intent.getExtras();
String value = extras.getString("myKey");
if(value!=null){
Log.d("hmmm",value);}}}
In my settings.class I have the following
returnHome.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
Intent intent = new Intent();
intent.putExtra("myKey", "YEAH");
setResult(RESULT_OK, intent);
finish();}});
Back in main app class it is not getting logged. Like I said I have three string in the main class that I want settings class to change and send back.
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Feb 11, 2010
I have an app which makes use of several layout-views. Every layout - view also got a class for it, which extend the Activity class. One class for example retrieves some database values whilst offering a search form to the user. Afterwards the user can select one of those values and he gets presented with another screen which gives similar options as the one selected. Anyways, I'd like for the first Activity to be able to send an array with data (Strings for example) to the second one. Right now I show an activity by using:
Intent i = new Intent(this, activitysName.class); startActivity(i);
I have no idea whilst using this construction how I can "initialize" the new object with the String array I want to pass to it. So how should this be achieved ? Should I be using something else instead of an Intent-Activity combination ?
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Apr 16, 2010
I do not know the reason why am i getting same values of different JSON date values. Here is my code for parsing date values in JSON date format:
package com.jsondate.parsing;
import java.text.SimpleDateFormat; import java.util.Date;
import android.app.Activity; import android.os.Bundle; import android.util.Log; import android.widget.TextView;
public class JSONDateParsing extends Activity {/** Called when the activity is first created. */String myString;
@Override public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
TextView tv = new TextView(this);
//Date d = (new Date(1266029455L));
//Date d = (new Date(1266312467L));
Date d = (new Date(1266036226L));
//String s = d.getDate() + "-" + d.getMonth() + "-" + d.getYear() + d.getHours() +
d.getMinutes() + d.getSeconds();
// SimpleDateFormat sdf=new SimpleDateFormat("yyyy MMM dd @ hh:mm aa"); //Toast.makeText(this, d.toString(), Toast.LENGTH_SHORT);
Log.e("Value:", d.toString());
myString = d.toString();
String []words = myString.split(" ");
for(int i = 0;i < words.length; i++)
Log.e("Value:", words[i]);
myString = words[2] + "-" + words[1] + "-" + words[5] + " " + words[3];
tv.setText(myString);
setContentView(tv);
} }
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Apr 9, 2009
Hello everyone, and thanks in advance for the help. What I'm trying to do is a relatively simple task, but one that doesn't seem to be working. What I'm trying to do is display the Orientation X,Y,Z coordinates on the screen in basic TextView boxes. The sensors are constantly updating my Global.myOrientation float array, and then I'm running a Timed thread (I'm very new to threading, so forgive me if it's ugly, but it gets the job done almost). In this thread I just set the value of each TextView's text to the desired value. The problem is that it only seems to work the first time.
It correctly displays whatever my initial data is, but then subsequent runs of the thread do nothign to update the onscreen values when I change the orientation of the phone. LogCat output shows me that inside the run() method, the values of Global.getOrientationX,Y,Z are being updated correctly, and that the right data is being passed to TextView. How can I get around this limitation of TextView being initialized once and then immutable?
Any assistance in fixing this, or providing an alternate solution would be greatly appreciated. Code posted below:
CODE:...............
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May 8, 2010
I have trouble (example<http://groups.google.com/group/android-developers/browse_thread/threa...>) wrapping my head around styles/themes. Can somebody help me or point me to actual documentation?
Let's say I have a drawable that I want to use as the background of a layout:
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle>
<gradient android:startColor="#9F9FA4" android:endColor="#66FFFFFF" android:angle="270" /> </shape>
Now I want to have a dark and a light theme. Depending on the chosen theme I want to have a different value for startColor and endColor. How do I do that? I am aware of extending themes, but what do I put into the items? How do I reference those new values then?
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Aug 23, 2009
I am experimenting with orientation sensor, register it like this: SesnorManager sensor_manager = (SensorManager)getSystemService (Context.SENSOR_SERVICE); Sensor sensor_orientation = sensor_manager.getSensorList (SensorManager.SENSOR_ORIENTATION).get(0); sensor_manager.register Listener(sensor_listener, sensor_orientation, SensorManager.SENSOR_DELAY_UI); and then read the orientation values in the sensor event listener: private final SensorEventListener sensor_listener = new SensorEventListener() { ... float sensor_data_x = event.values[SensorManager.DATA_X];}
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Nov 21, 2010
I am creating a Quiz application. Questions are added thru web form.I am using Mysql and ruby on rails for doing so. I would like to display the questions and its options in android application with next and previous options.I am very new to android.Can somebody please tell me how do i do this?
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May 16, 2010
I am setting multiple alarms like this, with different values of id. Multiple calls to AlarmManager.setRepeating deliver the same Intent/PendingIntent extra values, but I supplied different ones.
AlarmManager alarms = (AlarmManager)context.getSystemService(
Context.ALARM_SERVICE); Intent i = new Intent(MyReceiver.ACTION_ALARM);
// "com.example.ALARM" i.putExtra(MyReceiver.EXTRA_ID, id);
// "com.example.ID", 2 PendingIntent p = PendingIntent.getBroadcast(context, 0, i, 0);
alarms.setRepeating(AlarmManager.RTC_WAKEUP, nextMillis, 300000, p); // 5 mins
And receiving them like this:
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(ACTION_ALARM)) {
// It's time to sound/show an alarm
final long id = intent.getLongExtra(EXTRA_ID, -1);
The alarm is delivered to my receiver at the right times, but often with EXTRA_ID set to the wrong value: it's a value that I have used at some point, just not the one that I wanted delivered at that particular time.
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Sep 13, 2010
I have a marker on the map using an Overlay. I also have access to the compass sensor which I'm able to show a textView with the orientation values (0 to 359). How can I apply this values to the marker? (which is a drawable). I already have a MAtrix created but when I insert the orientation value gives me an error, here it is:
GeoPoint geopoint = new GeoPoint((int) (newLocation.getLatitude() * 1E6),
(int) (newLocation.getLongitude() * 1E6)); Paint paint = new Paint();
Point pt = new Point(); mapView.getProjection().toPixels(geopoint, pt);
Bitmap bmp = BitmapFactory.decodeResource(getResources(),R.drawable.user2);
Matrix matrix = new Matrix(); matrix.postTranslate(-25, -25);
matrix.postRotate(direction); matrix.postTranslate(pt.x, pt.y);
paint.setAntiAlias(true); paint.setFilterBitmap(true);
int width = bmp.getWidth(); int height = bmp.getHeight();
Bitmap changedBitmap = Bitmap.createBitmap(bmp, 0, 0, width, height, matrix, true);
BitmapDrawable icon = new BitmapDrawable(changedBitmap);
icon.setBounds(0, 0, icon.getIntrinsicWidth(), icon.getIntrinsicHeight());
userOverlay useroverlay = new userOverlay(icon); useroverlay.addItem(item);
mapView.getOverlays().add(useroverlay);
I used the value retrieved from the sensor on "direction" but it doesn't work.
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Jun 15, 2010
I need to pass data's (String) from one screen to another screen. At the time of button click i need to pass values from first screen to the next screen.
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Nov 22, 2010
I am developing an android application based on web services. How can I run query (server using php and MySQL) based on the item clicked and get the result from the web. I also want to show some values as list (List layout). Is there anyway to accomplish this?
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Oct 14, 2010
I develop app and I need to store and read ( read every 60 seconds, store rare ) data. What is the most easy way to achieve this?
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Sep 27, 2010
I create database using sqlite in command prompt. In my login screen user can enter loginid and password. then click the login button. while click the button I need to check that ..if login successful I need to retrieve other details from the same table . How can i achieve this. is there any sample code...
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Jul 8, 2009
I was wondering if it is possible to start the gps receiver on the phone if the current activity is not a mapactivity. I am displaying a listview and when I start the gps I get the last location found correctly, however the gps indicator never appears on top of the phone's display even if I wait or restart this activity. The location of the gps stays the some. The gps indicator appears on top only if I enter an activity where a mapview is displayed. If I wait in the map activity for a little while then If I go back to my other activity and request the location there, then the location is updated with the last value that it had before exiting the map view. It never gets updated If I move around after that, though..
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