How do I change TextView Value inside Java Code

Question

I am working on a android program  A user clicks on a button I do some math and I would like to change the values that I have on my view in some TextView objects   Can someone please tell me how to do it in my code

User · Accepted Answer

I presume that this question is a continuation of this one.

What are you trying to do? Do you really want to dynamically change the text in your TextView objects when the user clicks a button? You can certainly do that, if you have a reason, but, if the text is static, it is usually set in the main.xml file, like this:

<TextView  
android:id="@+id/rate"
android:layout_width="fill_parent" 
android:layout_height="wrap_content" 
android:text="@string/rate"
/>

The string "@string/rate" refers to an entry in your strings.xml file that looks like this:

<string name="rate">Rate</string>

If you really want to change this text later, you can do so by using Nikolay's example - you'd get a reference to the TextView by utilizing the id defined for it within main.xml, like this:


final TextView textViewToChange = (TextView) findViewById(R.id.rate);
textViewToChange.setText(
    "The new text that I'd like to display now that the user has pushed a button.");

User · Answer

First  add a textView in the XML file  lt TextView       android id  quot   id rate id quot      android layout width  quot fill parent quot       android layout height  quot wrap content quot       android text  quot  string what U want to display in first time quot        gt   then add a button in xml file with id btn change textView and write this two line of code in onCreate   method of activity Button btn   Button  findViewById R id  btn change textView   TextView textView  TextView findViewById R id rate id    then use clickListener   on button object like this btn setOnClickListener new View OnClickListener       public void onClick View v                   textView setText  quot write here what u want to display after button click in string quot

User · Answer

First we need to find a Button   Button mButton    Button  findViewById R id my button     After that  you must implement View OnClickListener and there you should find the TextView and execute the method setText   mButton setOnClickListener new View OnClickListener       public void onClick View v            final TextView mTextView    TextView  findViewById R id my text view           mTextView setText  Some Text

[java] How do I change TextView Value inside Java Code?

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