I have code (which can be seen below) which does not function correctly. I have tried literally every solution already presented on SO and i cannot find anything that will work for my problem.
The aim of my application is to get the Key Code (either numerical or represented as the label/"KEYCODE_A") and output this to a txt file. Regardless of the txt file aspect, i cannot even get the keycode to output to the log.
The only four keycodes that come from the stock android keyboard are:
KEYCODE_SHIFT_LEFT = 59
KEYCODE_SHIFT_RIGHT = 60
KEYCODE_ENTER = 66
KEYCODE_DEL = 67
Please can someone help me to be able to get the characters on the keyboard represented as a numerical value or otherwise to output to either the log, a field, or a text file.
I have tried numerous solutions such as
char unicodeChar = (char)event.getUnicodeChar();
try editText.setOnEditorActionListener
and they do not work.
Thank you in advance for your help!!!!!!!
public class MainActivity extends AppCompatActivity{
EditText et_name, et_content;
Button b_save;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE)
!= PackageManager.PERMISSION_GRANTED) {
requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1000);
}
et_name = (EditText) findViewById(R.id.et_name);
et_content = (EditText) findViewById(R.id.et_content);
final TextView view = (TextView) findViewById(R.id.view);
b_save = (Button) findViewById(R.id.b_save);
et_content.setOnKeyListener(new View.OnKeyListener(){
public boolean onKey(View v, int keyCode, KeyEvent event) {
// String keyCodeStr = KeyEvent.keyCodeToString(keyCode);
//view.setText(String.valueOf(keyCodeStr));
char unicodeChar = (char) event.getUnicodeChar();
Log.e("Key", "Code "+keyCode + " " + unicodeChar);
et_content.getText().append(unicodeChar);
return true;
}
});
b_save.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String filename = et_name.getText().toString();
String content = et_content.getText().toString();
saveTextAsFile(filename, content);
}
});
}
private void saveTextAsFile (String filename, String content){
String fileName = filename + ".txt";
//create file
File file = new File (Environment.getExternalStorageDirectory().getAbsolutePath(), fileName);
//write to file
try {
FileOutputStream fos = new FileOutputStream(file);
fos.write(content.getBytes());
fos.close();
Toast.makeText(this, "Saved", Toast.LENGTH_SHORT).show();
} catch (FileNotFoundException e){
e.printStackTrace();
Toast.makeText(this, "File not found", Toast.LENGTH_SHORT).show();
} catch (IOException e){
e.printStackTrace();
Toast.makeText(this, "Error saving", Toast.LENGTH_SHORT).show();
}
}
#Override
public void onRequestPermissionsResult(int requestCode, #NonNull String[] permissions, #NonNull int[] grantResults) {
switch (requestCode){
case 1000:
if (grantResults[0] == PackageManager.PERMISSION_GRANTED){
Toast.makeText(this, "Permission Granted", Toast.LENGTH_SHORT).show();
} else{
Toast.makeText(this, "Permission Not Granted", Toast.LENGTH_SHORT).show();
finish();
}
}
}
}
Thank you for your help!
Any more info needed please let me know, but i'm very desperate to get this fixed!
Soft keyboards rarely if ever send key codes. They tend to send text directly via commitText() calls on the input connection. They just don't work on the old "send hardware key event" model you want them to, there's no way to do what you're trying.
You can try creating your own custom input connection and working on that level. But my guess is you'll have a lot of issues dealing with the predictive capabilities of the keyboard and composing text (a concept where part of the text is temporary and is overwritten by the next send of any text). And the fact that it may send whole words at a time rather than letters/keystrokes
Related
I have a variable MyFinalPressure which is populated with sensor data from the sensors pressure. If MyFinalPressure is == to 4000 (4000 points or 40 sec) then stop writing to local storage.
But it looks like when I debug the code, it hits the boolean MaxPoints and is still writing. I wonder if my logic is wrong or not.
Could you please help me out.
public Boolean Store = false;
Boolean MaxPoints = false;
if (activity.Store) {
activity.writeToFile(MyFinalPressure);//MyFinalPressure is float of one dimension array or stream of array.
}
if (MyFinalPressure==4000){ //this conditon, am trying to stop wrting to local memory.
activity.MaxPoints = true;
}
FileOutputStream fileOutputStream;
//method to write into local memory.
public void writeToFile(final float MyFinalPressure) {
Log.d(TAG, "writeToFile.");
String finalData;
finalData = String.valueOf(MyFinalPressure);
try {
// true here for 'append'
fileOutputStream = new FileOutputStream(file, true);
String Space = " ";
byte[] convert = Space.getBytes();
fileOutputStream.write(finalData.getBytes());
fileOutputStream.write(convert);
fileOutputStream.flush();
fileOutputStream.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
//write to file.
StartWriting = (ToggleButton) findViewById(R.id.startWriting);
StartWriting.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (StartWriting.isChecked()) {
Store = true;
Toast.makeText(getApplicationContext(), "Data Starts writing into (Message.txt) file", Toast.LENGTH_LONG).show();
} else {
if (!StartWriting.isChecked()|| MaxPoints==true) { //here - this is wrong logic to stop writing to my file.
Toast.makeText(getApplicationContext(), "Data Stored at myAppFile", Toast.LENGTH_SHORT).show();
String finalData1;
finalData1 = String.valueOf(fileOutputStream);
Log.i(TAG, "of_writes: " + finalData1);
// Toast.makeText(getApplicationContext(), "Data_write_number: " + finalData1.length(), Toast.LENGTH_SHORT).show();
Store = false;
}
}
}
});
Just take out !StartWriting.isChecked()
Because of the above if statement StartWriting.isChecked() will always be false. Then because you are checking for "!StartWriting.isChecked()" it will always enter the statement.
I'm trying to write the stream of my array that is coming from Bluetooth module and read from (HandleRead), to the internal storage directly. Is that possible in the first place?
Note that I am reading 100 samples per second. That means the file will fill up quickly. I am not familiar with storage, and my code isn't executed as I expected.
public class MainActivity extends ActionBarActivity implements SensorEventListener {
File Root = Environment.getExternalStorageDirectory();
File Dir = new File (Root.getAbsolutePath()+"/myAppFile");
File file = new File(Dir,"Message.txt");
#Override
protected void onCreate(Bundle savedInstanceState){
String state;
state = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED.equals(state)){
if (!Dir.exists()){
Dir.mkdir();
}
}
private void handleRead(Message msg) {
byte[] readBuf = (byte[]) msg.obj;
String readMessage = new String(readBuf);
ByteBuffer buffer = ByteBuffer.wrap(readBuf, 0, readBuf.length);
buffer.order(ByteOrder.BIG_ENDIAN);
buffer.clear();
final String[] strNumbers = readMessage.split("\n");
for (int j = 1; j <= strNumbers.length - 2; j++) {
pressure = Integer.parseInt(readMessage2);
MyFinalPressure = (float) (9.677 +0.831 * pressure);
// trying to store directly to internal sotrage
activity.save.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
try {
FileOutputStream fileOutputStream = new FileOutputStream(activity.file);
fileOutputStream.write((int) MyFinalPressure);
fileOutputStream.close();
Toast.makeText(activity.getApplicationContext(),"Message saved ", Toast.LENGTH_SHORT).show();
} catch (FileNotFoundException e){
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
}
}
}
It appears you are not setting the FileOutputStream to 'append' (you need to add 'true' as 2nd parameter in constructor.)
This would write over the file from the file-start every time
also your 'setOnClickListener' is INSIDE your loop. This doesn't do anything for you as far as I can tell.
I recommend always setting up UI elements in a private void setupUI() {...} method that onCreate calls. The public void onClick(View v) {buttonForSavingPresssed()} where buttonForSavingPressed(){...} is the 'logic' of your onClick() method.
This will help you clean up the class and not have stray onClickListener assignments, etc.
My guess is that either your multiple assignments is very inefficient, since clickListeners aren't cheap, or... the clickListener might not even work at all because of a timing issue (if your loop is long running and you press the button and the listener has already been swapped for a new one)
I've cleaned up your code some, There are some suggestions and some log statements that should help you figure out what is going on.
// this is inside your onCreate()
...
activity.save.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) { buttonPressed();}
});
...
// Here is where you would put your logic when the button is presssed
public void buttonPressed(){
Toast.makeText(activity.getApplicationContext(),"Button Pressed ",
Toast.LENGTH_SHORT).show();
}
// you should make 'helper' functions that consolidate separate pieces of logic like this,
// that way you can more easily track what is happening in each method.
// Plus it helps keep each method shorter for ease of understanding, etc.
public void writeToFile(float finalPressure){
Log.d(LOG_TAG // where LOG_TAG is the String name of this class
"writeToFile(float) called." );
try{
// true here for 'append'
FileOutputStream fileOutputStream = new
FileOutputStream(activity.file, true);
fileOutputStream.write((int) finalPressure);
fileOutputStream.close();
}catch (FileNotFoundException e){
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
// now back to your handleRead, is this method called async wenever
// a message is read? Then wouldn't this be called a lot? I'm lost as to why
// you had the button in here at all.
private void handleRead(Message msg) {
Log.d(LOG_TAG // where LOG_TAG is the String name of this class
"handleRead(Message) called." );
byte[] readBuf = (byte[]) msg.obj;
String readMessage = new String(readBuf);
ByteBuffer buffer = ByteBuffer.wrap(readBuf, 0, readBuf.length);
buffer.order(ByteOrder.BIG_ENDIAN);
buffer.clear();
final String[] strNumbers = readMessage.split("\n");
Log.d(LOG_TAG // where LOG_TAG is the String name of this class
"strNumbers length: " + strNumbers.length );
for (int j = 1; j <= strNumbers.length - 2; j++) {
pressure = Integer.parseInt(readMessage2);
MyFinalPressure = (float) (9.677 +0.831 * pressure);
// trying to store directly to internal sotrage
writeToFile(MyFinalPressure);
}
}
I'm developing an app which will do multiple method in a single input. For example calculating square circumference and area, I give only one EditText and two button. But when I run the app, if I give an input and click the area button it won't do the calculation until I click the circumference button. And same goes if I change the input. Here is the code:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.square);
etSide = (EditText) findViewById(R.id.etSquare);
tvResult = (TextView) findViewById(R.id.tvSquare);
Button btnCir = (Button) findViewById(R.id.btnSqrCir);
btnCir.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
countCir();
}
});
Button btnArea = (Button) findViewById(R.id.btnSqrArea);
btnArea.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v) {
countArea();
}
});
}
private void countArea() {
try {
side = etSide.getText().toString();
s = parseInt(side);
area = s * s;
tvResult.setText("Area = " + cir);
} catch (NumberFormatException ex){
Toast.makeText(getApplicationContext(), "Oops, you seem haven't enter the side length", Toast.LENGTH_LONG).show();
}
}
private void countCir() {
try {
side = etSide.getText().toString();
s = parseInt(side);
cir = 4 * s;
tvResult.setText("Circumference = " + area);
} catch (NumberFormatException ex){
Toast.makeText(getApplicationContext(), "Oops, you seem haven't enter the side length", Toast.LENGTH_LONG).show();
}
}
Any better idea? Really need help...
It looks like you have your variables backwards. For example:
private void countArea() {
try {
side = etSide.getText().toString();
s = parseInt(side);
area = s * s;
tvResult.setText("Area = " + cir); // <-- here cir doesn't have a value until you click the circumference button
} catch (NumberFormatException ex){
Toast.makeText(getApplicationContext(), "Oops, you seem haven't enter the side length", Toast.LENGTH_LONG).show();
}
}
So your TextView would display ""Area = ""
It looks to me like you want
tvResult.setText("Area = " + cir);
to be
tvResult.setText("Area = " + area);
Let me know if I'm not understanding you correctly
Note:
For your Toast you should use this or YourActivityName.this for Context instead of getApplicationContext()
One other suggestion I might make since your onClick()s only call a method, to make it simpler you could use one listener like this
public void onCreate(...)
{
...
btnCir.setOnClickListener(this);
btnArea.setOnClickListener(this);
...
}
public void onClick(View v)
{
switch(v.getId()) // get the id of the Button clicked
{
case (R.id.btnSqrArea): // call appropriate method
countArea();
break;
case (R.id.btnSqrCir):
countCir();
break;
}
}
You would just have to remember to add implements OnClickListener to your class definition. That's just a preference but worth mentioning.
I have a problem on android. I have an application that asks the user for the local Ip address (from the device's interface) and another remote address. The application has to bind to the specified local address and connect to the remote address. Quite simple, but, indeed, bind does not work ass i expected..
I added the following permissions on the manifest file:
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
The source code is the following one:
public class MainActivity extends Activity
{
String Tag = "TAG";
private int LOCAL_PORT = 4444;
private int REMOTE_PORT = 80;
private EditText LOCAL;
private EditText REMOTE;
private Button Connect;
private TextView STATUS;
private Context context = this;
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
LOCAL = (EditText) findViewById(R.id.editText1);
REMOTE = (EditText) findViewById(R.id.editText2);
Connect = (Button) findViewById(R.id.button1);
Connect.setOnClickListener(new View.OnClickListener() {
public void onClick(View v)
{
BotleneckHandle WORK;
Toast.makeText(getApplicationContext(), "Proceeding to connect",
Toast.LENGTH_SHORT).show();
/*
if(LOCAL.getText().toString() == null || REMOTE.getText().toString() == null || LOCAL.getText().toString().equals(" ") || REMOTE.getText().toString().equals(" ") || LOCAL.getText().toString().equals("") || REMOTE.getText().toString().equals(""))
Toast.makeText(context, "Wrong parameters", 2000);
else
{
Toast.makeText(getApplicationContext(), "Proceeding to connect",Toast.LENGTH_SHORT).show();
}*/
WORK = new BotleneckHandle();
WORK.execute();
}
});
STATUS = (TextView) findViewById(R.id.textView1);
}
private class BotleneckHandle extends AsyncTask <Void , Void , String>
{
Socket Skt = null;
String ReturnStatemente = new String();
SocketAddress localAddr = new InetSocketAddress(LOCAL.getText().toString(), LOCAL_PORT);
protected void onPreExecute(){ }
protected String doInBackground(Void... params)
{
try
{
String s=new String();
s+= "Local="+LOCAL.getText().toString()+":"+LOCAL_PORT+" Remote="+REMOTE.getText().toString()+":"+REMOTE_PORT; //so far so good, Confirmed by debug
Toast.makeText(getApplicationContext(), s,Toast.LENGTH_SHORT).show(); //Does not show anything due the fact that i didn't published it as an assync task update..
//binding to a local address
Skt.bind(localAddr); //cannot make the bind :-/
//connecting to remote host
Skt=new Socket(REMOTE.getText().toString(), REMOTE_PORT); //if bind is comment, still does not work.. I bet
ReturnStatemente = "Connected";
}
catch (UnknownHostException e)
{
e.printStackTrace();
Toast.makeText(context, "Unknown remote host", 2000);
ReturnStatemente = "Not Connected";
}
catch (IOException e)
{
e.printStackTrace();
Toast.makeText(context, "Connection fail", 2000);
ReturnStatemente = "Not Connected";
}
finally{try {
Skt.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}}
return ReturnStatemente;
}
protected void onPostExecute(String result) { STATUS.setText(" CONECTION STATUS == " + result); }
}
}
What am i doing wrong on bind? As far as i see, and as i searched for its good.. Did i miss something?
kind regards
You're trying to call bind on a variable before you assigned anything to it. So its still null. That isn't going to work. You need to create an instance of Socket before you can call methods on it.
I am trying to test a simple file i/o program on android where i type in some text in
EditText and when i click the Save Button, it writes the content in a file. and when i click the Load button it loads the content back into the EditText.
here is my code---
public class Activity2 extends Activity {
private EditText textBox;
private static final int READ_BLOCK_SIZE = 100;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.layout2);
textBox = (EditText) findViewById(R.id.txtText1);
Button saveBtn = (Button) findViewById(R.id.btnSave);
Button loadBtn = (Button) findViewById(R.id.btnLoad);
saveBtn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
String str = textBox.getText().toString();
try
{
PrintWriter PR=new PrintWriter(new File("text1.txt"));
PR.write(str);
PR.flush();
PR.close();
//textBox.setText("");
//---display file saved message---
Toast.makeText(getBaseContext(),
"File saved successfully!",
Toast.LENGTH_SHORT).show();
//---clears the EditText---
textBox.setText("");
}
catch (IOException ioe)
{
ioe.printStackTrace();
}
}
});
loadBtn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
try
{
File f=new File("text1.txt");
BufferedReader BR=new BufferedReader(new FileReader(f));
String txt="";
String str;
while((str=BR.readLine())!=null)
{
txt+=str;
}
//---set the EditText to the text that has been
// read---
textBox.setText(txt);
BR.close();
Toast.makeText(getBaseContext(),
"File loaded successfully!",
Toast.LENGTH_SHORT).show();
}
catch (IOException ioe) {
ioe.printStackTrace();
}
}
});
}
}
`
why is it not working? Thanks in advance for any help. Any explanation would be highly appreciated.
Using new File("text1.txt") as output does not work on Android. The current working directoy is always / which is not writable for your app. Use
File f = new File(Environment.getExternalStorageDirectory(), "text1.txt");
getExternalStorageDirectory() is the internal storage for newer phones.
Your app Context has several paths that you can use if you want to store data in your app-private folder. Paths from Environment are in public places where you can simply read the data with a filemanager
And don't forget to add
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
in case you want to write to those public paths