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Android Programming, Display Certain word upon user entering Word

Ok so what i want to do is, make my app that Has 1 button "button1" and two TextInputs "TX1","TX2" display a certain word in "TX2" when the user types something in "TX1", For example, The User types "Hello" into "TX1" and i want "Test" to be displayed in "TX2" when the user clicks the button,i also want to be able to add multiple combinations, i have no idea how to make my app do this, perhaps using "Strings" and "If, Else". Thanks
BTW: i do have an alright understanding off android.

As per my understanding from your question,
you would be having two EditText and one button.
In the onClick event of the button, check the value of editext1, like this
Button button=(Button)findViewById(R.id.button1);
button.setOnClickListener(new View.OnClickListener()
{
public void OnClick(View v)
{
String val = Editext1.getText();
if(val.equals("hello")
{
Editext2.setText("Test");
}
}
});

Android - Getting volume button long clicks

Can someone please show me a code example about how to get a long click (2 sec for example) on the volume up hardware key?
Thanks :)
EDIT
The class that i want to capture the long click with is a Service. How can i do that?

If you just need to capture long clicks, this answer might be helpful:
https://stackoverflow.com/a/5269673/1401257
EDIT:
I have never tried to have a key listener inside a service, but with a little help from Google I found this: Volume change listener?
It seems that normal key events can only be handled from Activities. I do not have time to try this out myself, but for capturing long clicks it might be possible to combine the answer from the link and Lukes answer.
From what I understand about BroadcastReceivers, you would want to create a receiver, that notify the Service whenever someone click the volume buttons.

Optionally you could do something like this:
if(clickedDown) {
if(beginningTime + 2000 < System.currentTimeMillis()) {
// Ok, the button has been clicked down for 2 seconds
}
}
else {
beginningTime = System.currentTimeMillis();
}
Applying something like this, you'll be able to define the amount of time to wait.

Text selection listener in Android(API level 7)

I need a listener which is called every time the selection in an EditText changes.
I googled around but I couldn't find anything useful for API level 7.
I'm writing a Text Editor and I want the bold/italic/underlined button appear selected every time the user selects bold/italic/underlined text.

Pretty old question, but someone might still need this, so here's my solution : since the text selection accomplished with long press on the text, I simply used the following :
editText.setOnLongClickListener(new View.OnLongClickListener() {
#Override
public boolean onLongClick(View view) {
// do whatever you need to do on text selection
}
});
This allows for custom behavior on text selection and doesn't prevent the user from copying/pasting.

The better way to do it would be to extend the EditText and then based upon how you would want to manage the changing text, you could override one of the 2 methods to work out your customized behavior.
If you want the selection changed then you could use the onSelectionChanged() method and implement your code there.
In case you want to implement something when the text changes in your editor then you could use, onTextChanged().

How to count yes and no answers using radio buttons

I don't know if this was asked or not (I searched a little but no result) but I'm kinda time pressed and I need help
I've been developing an application in Android and I've only started under this platform for 3 months
I have a choice test with different questions and yes and no answers using radio buttons
I want to count the "yes" answers but even like this if I put r1.isChecked() instead of for and buttons[i].isChecked() it counts the clicks
Here is what I tried until now and I get force close everytime I click on the first radiobutton RadioButton[]buttons={rb1, rb3,rb5} ;
public void onClick(View view){
checkStates(buttons);
}
private void checkStates(RadioButton[] buttons) {
for (int i=0; i<buttons.length; i++) {
if (buttons[i].isChecked())
da++;}
tv.setText("Result:"+yes);
}
How can I tell my appplication that the radiobuttons are already checked and no need to increment it on a second click (on the same radio button?)
Is there a way to count using the ids or the name of the radiobuttons?
If so how should I do it? Some tutorials (I love them) and tips would help a lot.
Thanks.

You wouldn't want to count each click or even each "state change" because that wouldn't be accurate.
The best thing to do would be to create a function called checkStates(RadioButton[] buttons) { }
You would call this function each time the user clicks a RadioButton.
You would have all your RadioButton objects stored in an array, which you pass to the function, and then the function goes through the list of RadioButtons and checks their state. If it counts 6 as being Yes, then go to your other activity.

Android: How to enable my button back if EditText is not empty?

I have 2 EditTexts; 01 and 02. My button will be disabled once the activity is started and when these two EditText contain text, the button has to be enabled again. However my button is always disabled and can't enable it using button.setEnabled(true);.
Can anyone help me with this?
summit.setEnabled(false);
buttonEnable();
public void buttonEnable(){
if (feedback.length()>0 && email.length()>0){
summit.setEnabled(true);
}else{
summit.setEnabled(false);
}
}

You're correct about needing a TextWatcher. The afterTextChanged(Editable) method is the one you're interested in for something like this. Call your buttonEnable() method from it, and add the TextWatcher to any applicable text fields. (Looks like feedback and email from your sample.)

One easy way can also be to set onKeyListener to your editText(), then if there is something in editText(), set button enable if nothing disable it.