CODEWITHSUNDEEP
javaandroid
Mac
Mac

Reputation: 27

How to set textview position constant in runtime?

I am trying to display some textviews visible in runtime. Here's my code:

for (int i=0; i<arrBool.length; i++) {
    arrBool[i] = r.nextBoolean();
        if(arrBool[i]==true) {                  
            textView[i].setVisibility(View.VISIBLE);
 }
}

When I run the application, textviews should randomly be visible. It is working, but my problem is I have set the layout of those textviews. When I run Android Application, the visible textviews go to top left corner and loses the layout position.

How to deal with this?

Upvotes: 0

Views: 415

Answers (3)

David Dimalanta
David Dimalanta

Reputation: 548

I don't think using the FOR loop will help you out making the random possibility of the visible text view everytime you open. Why don't you just use the integer (0 for false and 1 for true) and a Random like this:

Random rnd = new Random(1);  // --> This will randomize numbers up to one;
int enable =  rnd.nextInt(); // --> Get the random value from 0 to 1

if(enable == 1) // --> If visibility of the text field is enabled everytime you opened the app...
{
      textView.setVisibility(View.VISIBLE);
} else {
      textView[i].setVisibility(View.INVISIBLE);
}

You can modify more and experiment on the randomizer for the integer's value by visiting this example at " How can I generate random number in specific range in Android? " topic. Check all the possible answers. Don't mind the green check mark and focus these answered codes by investigate its comments. I'm sure all of these answers about "random" topic, the link I gave you, is guaranteed effective.

About the layout, I recommend not to use the relative layout and instead use the linear layout because using the linear layout stays on the original place proportionally since relative layout is screen resolution dependent on the coordinates. Also try practicing manipulate the string value dimensions under res folder to maintain the size of the text proportionally in different screen resolution (from HVGA to WVGA). Check at " Different font sizes for different screen sizes " for more details about text size proportion.

Upvotes: 0

PravinCG
PravinCG

Reputation: 7708

Adding more to teoREtik solution.

In your layout do not specify the android:visible property.

for (int i=0; i<arrBool.length; i++) {
    arrBool[i] = r.nextBoolean();
    if(arrBool[i]==true) {                  
        textView[i].setVisibility(View.VISIBLE);
    else 
        textView[i].setVisibility(View.INVISIBLE);
    }
}

Upvotes: 2

teoREtik
teoREtik

Reputation: 7916

Change start visibility parameter of views to View.INVISIBLE It will hold their own places on the layout and prevent from taking this places by other views, which is normal behavior in case of View.GONE

Upvotes: 2

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