Develop Reference

Change button text over other button android

I create an application in android studio and I need advice, I got one button, and I need to change the text on the second button clicks through to the first. I have a code that changes only TextView but not the text on the button.
NewText = (TextView)findViewById(R.id.textView1);
ChangeText = (Button)findViewById(R.id.ch_txt_ger);
final TextView finalNewText1 = NewText;
ChangeText.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//Set Text on button click via this function.
finalNewText1.setText(" (Frohe Weihnachten) ");
}
});

Same concept as you did for textView
Button SecondButton,ChangeText; // declaring the buttons
SecondButton = (Button)findViewById(R.id.button2);
ChangeText = (Button)findViewById(R.id.ch_txt_ger);
ChangeText.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//This changes the text on the second button
SecondButton.setText("New Text Here");
}
});
SecondButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//Do anything
}
});

Button ChangeText;
ChangeText = (Button)findViewById(R.id.ch_txt_ger);
ChangeText.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//part to change the button text
Button tmp_button = (Button)findViewById(R.id.ch_txt_ger);
tmp_button.setText("Frohe Weihnachten");
//part to change the textview text
TextView NewText
NewText = (TextView)findViewById(R.id.textView1);
finalNewText1.setText(" (Frohe Weihnachten) ");
}
});
After Clicking outlooking
Here you go: You can define a temporary button variable and make the change on it if setting the same button on its own clicking is causing problems.
And if the text will not change according to user, and if you know it like On/OFF, Red/Green you can also code it with a selector file which would make the java code look more clean.
A tiny advise: Defining the TextViews and Buttons that will get affected should all be written in the same function and close to the place where they are being changed for you to keep track of where you coded them.

I would add one thing, in case if you want to save the new button name when you close and reopen your app, you could use Shared Preferences: https://developer.android.com/training/basics/data-storage/shared-preferences.html

Change View Text Color by code

Well, I developed a menu with eight Buttons for an App. So, every time the user clicks on in one of the buttons, such button changes its background. And I would would like to change its color as well. But I got now idea how, since setTextColor does not work with Views.
I'm using View because its part of onClick method that I override in order to achieve what I want. So, here go the code:
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
v.setBackgroundResource(R.drawable.degrade_menu);
}
So, how could I change the text color?
Cheers,

Cast your v to TextView and then set the text color. Do not forget to read color from resourse
((TextView)v).setTextColor(getResources().getColor(R.color.errorColor));

quick solution:
final Button button = (Button) findViewById(<id>);
button.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
button.setTextColor(<color>);
}
};
better solution: use states

Cast the view to a button. Then you can use settextcolor

When button gets clicked, make it dissapear, randomely change bg color and load text from database?

I am busy creating an app. I succeeded in creating the button with a custom font and all. Now what I'd want is that when I click the button, it must disapear, the background color of the view must randomely change and text must be loaded from an database.
How does one go about this?
Matthew

Well, the disappearing can be make like this:
public class MyActivity extends Activity {
protected void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.content_layout_id);
final Button button = (Button) findViewById(R.id.button_id);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Perform action on click - Disappear in your case...
v.setVisibility(View.INVISIBLE); //can be View.GONE as well...
}
});
}
}
Then for the background I guess you can create an array with all the colors you want (or something that generates a random HEX code) and then do setBackground(X) where X is the HEX code that you just generated... You need to specify more about the database part though.

clearColorFilter() don't work on android 2.3

i'm using setColorFilter to color some button... the code is this:
final Button falso = (Button) findViewById(R.id.falso);
final Button vero = (Button) findViewById(R.id.vero);
vero.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
vero.getBackground().setColorFilter(new LightingColorFilter(0x00000000, 0x00FF0FF));
falso.getBackground().clearColorFilter();
esame.set("V");
}
});
falso.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
falso.getBackground().setColorFilter(new LightingColorFilter(0x00000000, 0x00FF0FF));
vero.getBackground().clearColorFilter();
esame.set("F");
}
});
when i click the button "vero" i want reset the colour of "falso" and viceversa.
i tried this code on android ics and all work good, but when i tried it on android 2.3 i have a bad surprise.
when i click the button the colour don't reset and i don't understand why.

i find the solution:
use button.invalidate();
after i clear background

Setting the ColorFilter to 0 will do thee job by clearing the filter.
vero.setInt(vero.getBackground(), "setColorFilter", 0);

change button image in android

I want to change the image of a button in my code. I found this can be done in xml:
please check this link
but the image will not stay on after I released the button. I want to click the button
and the button change to a new image. Can this be done?

in onClick method you need to change the Button's image, this way..
public void onClick(View v) {
if(v==buttonName){
buttonName.setBackgroundResource(R.drawable.imageName);
}
}

Assuming an ImageButton...
You can change the background image in an onClick listener, similar to the following:
myButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
//set button image
myButton.setImageBitmap(myBitmapFile)
}
});