Re: [android-developers] button onClick handler retrieve custom attribute value declared in activity_main.xml

2016-08-08 Thread Steve Gabrilowitz 
You might also want to create your buttons with a loop in your code instead
of in the layout file

On Aug 8, 2016 5:41 AM, "Thomas Fazekas"  wrote:

> My bad... thanks for setting me straight.
>
> On Sunday, August 7, 2016 at 5:18:52 PM UTC+2, Steve Gabrilowitz wrote:
>>
>> toString() returns a string representation of an object which is not
>> necessarily the value of the object.  your view.getTag() returns an object
>> which is already a String so all you have to do is cast it to string rather
>> than using toString() on it
>>
>> String buttStr = (String) view.getTag(); is what you need
>>
>> On Aug 7, 2016 3:35 AM, "Thomas Fazekas"  wrote:
>>
>> Dear all,
>>
>> here is what I want to do : declare a whole bunch of buttons in the
>> activity_main.xml each of them having one custom tag (in this case it's
>> called "tag").
>> All the buttons would share the same onClick handler, where I would use
>> this custom property value to construct some strings (a URL actually).
>>
>> Code excerpt :
>>
>> activity_main.xml
>>
>> > android:orientation="horizontal"
>> android:layout_width="match_parent"
>> android:layout_height="wrap_content"
>> android:gravity="center">
>>
>> > android:layout_width="48dp"
>> android:layout_height="48dp"
>> android:text="o"
>> android:id="@+id/led0"
>> android:tag="paramValue1"
>> android:onClick="sendURL" />
>>
>> > android:layout_width="48dp"
>> android:layout_height="48dp"
>> android:text="o"
>> android:tag="paramValue2"
>> android:id="@+id/led1"
>> android:onClick="sendURL"/>
>>
>> 
>> 
>>
>> and then in the ActivityMain.java I would use this value :
>>
>> public class MainActivity extends AppCompatActivity {
>>
>> @Override
>> protected void onCreate(Bundle savedInstanceState) {
>> super.onCreate(savedInstanceState);
>> setContentView(R.layout.activity_main);
>> }
>>
>> public void sendLed(View view){
>> ...
>> String buttStr = view.getTag().toString();
>> ...
>> }
>> }
>>
>> Now , is that in anyway possible ?
>> The above construct gets me an NPE.
>>
>> I am aware that I could use a switch statement (to compare the view.getId()
>> with the individual ids of the buttons) but that seems a lot of comparisons
>> for nothing (I would use that additional value "blindly", i.e. it doesn't
>> matter which button has been pressed)
>>
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>> 40googlegroups.com
>> 
>> .
>>
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Re: [android-developers] button onClick handler retrieve custom attribute value declared in activity_main.xml

2016-08-08 Thread Thomas Fazekas 
My bad... thanks for setting me straight.

On Sunday, August 7, 2016 at 5:18:52 PM UTC+2, Steve Gabrilowitz wrote:
>
> toString() returns a string representation of an object which is not 
> necessarily the value of the object.  your view.getTag() returns an object 
> which is already a String so all you have to do is cast it to string rather 
> than using toString() on it
>
> String buttStr = (String) view.getTag(); is what you need
>
> On Aug 7, 2016 3:35 AM, "Thomas Fazekas"  > wrote:
>
> Dear all,
>
> here is what I want to do : declare a whole bunch of buttons in the 
> activity_main.xml each of them having one custom tag (in this case it's 
> called "tag").
> All the buttons would share the same onClick handler, where I would use 
> this custom property value to construct some strings (a URL actually).
>
> Code excerpt :
>
> activity_main.xml
>
>  android:orientation="horizontal"
> android:layout_width="match_parent"
> android:layout_height="wrap_content"
> android:gravity="center">
>
>  android:layout_width="48dp"
> android:layout_height="48dp"
> android:text="o"
> android:id="@+id/led0"
> android:tag="paramValue1"
> android:onClick="sendURL" />
>
>  android:layout_width="48dp"
> android:layout_height="48dp"
> android:text="o"
> android:tag="paramValue2"
> android:id="@+id/led1"
> android:onClick="sendURL"/>
>
> 
> 
>
> and then in the ActivityMain.java I would use this value :
>
> public class MainActivity extends AppCompatActivity {
>
> @Override
> protected void onCreate(Bundle savedInstanceState) {
> super.onCreate(savedInstanceState);
> setContentView(R.layout.activity_main);
> }
>
> public void sendLed(View view){
> ...
> String buttStr = view.getTag().toString();
> ...
> }
> }
>
> Now , is that in anyway possible ?
> The above construct gets me an NPE.
>
> I am aware that I could use a switch statement (to compare the view.getId() 
> with the individual ids of the buttons) but that seems a lot of comparisons 
> for nothing (I would use that additional value "blindly", i.e. it doesn't 
> matter which button has been pressed) 
>
> -- 
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> .
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> To view this discussion on the web visit 
> https://groups.google.com/d/msgid/android-developers/fa4ae215-281e-4fcf-b929-005b59f2ef2f%40googlegroups.com
>  
> 
> .
>
> For more options, visit https://groups.google.com/d/optout.
>
>
>

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Re: [android-developers] button onClick handler retrieve custom attribute value declared in activity_main.xml

2016-08-07 Thread Steve Gabrilowitz 
toString() returns a string representation of an object which is not
necessarily the value of the object.  your view.getTag() returns an object
which is already a String so all you have to do is cast it to string rather
than using toString() on it

String buttStr = (String) view.getTag(); is what you need

On Aug 7, 2016 3:35 AM, "Thomas Fazekas"  wrote:

Dear all,

here is what I want to do : declare a whole bunch of buttons in the
activity_main.xml each of them having one custom tag (in this case it's
called "tag").
All the buttons would share the same onClick handler, where I would use
this custom property value to construct some strings (a URL actually).

Code excerpt :

activity_main.xml










and then in the ActivityMain.java I would use this value :

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}

public void sendLed(View view){
...
String buttStr = view.getTag().toString();
...
}
}

Now , is that in anyway possible ?
The above construct gets me an NPE.

I am aware that I could use a switch statement (to compare the view.getId()
with the individual ids of the buttons) but that seems a lot of comparisons
for nothing (I would use that additional value "blindly", i.e. it doesn't
matter which button has been pressed)

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msgid/android-developers/fa4ae215-281e-4fcf-b929-
005b59f2ef2f%40googlegroups.com

.

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[android-developers] button onClick handler retrieve custom attribute value declared in activity_main.xml

2016-08-07 Thread Thomas Fazekas 
Dear all,

here is what I want to do : declare a whole bunch of buttons in the 
activity_main.xml each of them having one custom tag (in this case it's 
called "tag").
All the buttons would share the same onClick handler, where I would use 
this custom property value to construct some strings (a URL actually).

Code excerpt :

activity_main.xml










and then in the ActivityMain.java I would use this value :

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}

public void sendLed(View view){
...
String buttStr = view.getTag().toString();
...
}
}

Now , is that in anyway possible ?
The above construct gets me an NPE.

I am aware that I could use a switch statement (to compare the view.getId() 
with the individual ids of the buttons) but that seems a lot of comparisons 
for nothing (I would use that additional value "blindly", i.e. it doesn't 
matter which button has been pressed) 

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[android-developers] button onClick handler retrieve custom attribute value declared in activity_main.xml

2016-08-07 Thread Thomas Fazekas 
Dear all,

here is what I want to do : declare a whole bunch of buttons in 
the activity_main.xml each of them having one custom tag (in this case it's 
called "tag").
All the buttons would share the same onClick handler, where I would use 
this custom property value to construct some strings (a URL actually).

Code excerpt :

actiity_main.xml













and then in the I would use this value :


public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}

public void sendLed(View view){
...




urlText.setText("http://"+hostText.getText().toString()+":"+portText.getText().toString()+"/"+view.getId());
}
}

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