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
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center">
<Button
android:layout_width="48dp"
android:layout_height="48dp"
android:text="o"
android:id="@+id/led0"
android:tag="paramValue1"
android:onClick="sendURL" />
<Button
android:layout_width="48dp"
android:layout_height="48dp"
android:text="o"
android:tag="paramValue2"
android:id="@+id/led1"
android:onClick="sendURL"/>
....
</LinearLyout>
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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