I have 4 textview such as t11,t12,t13,t14 and I have also 4 value in array val[4].
I want to store these values randomly in textviews. but I am getting little problem.
I have done following code:
TextView t11,t12,t13,t14;
Random r = new Random();
for (int i = 0; i < val.length; i++) {
int val[4]=r.nextInt(10);
Log.d("horror", "Randm Array of VAL:" +val[i]);
}
In the Log,there are 4 values displayed but how to display them in textviews.
I have coded but it does not work properly.
t1[i+1].setText("" +val[i]);
and
In this case,values are properly displayed, but i want to do code optimization.
t11.setText("" +val[0]);
t12.setText("" +val[1]);
t13.setText("" +val[2]);
t14.setText("" +val[3]);
Thanks in advance.
Every time you loop in for, you create another integer array. Take the definition of val out of the for loop.
you can store their references inside an array , it won't create new objects. so this should do the job
TextView [] textviews = {t11,t12,t13,t14};
for(int i =0;i<textviews.length;++i){
textviews[i].setText(val[i]);
}
For your TextView use something like,
TextView [] tv = {t11,t12,t13,t14};
and use tv for other going stuff... So now, you can getting it work by,
tv[i+1].setText("" +val[i]);
Related
I am trying to randomly call methods to make it use a different animation every time to display a textview. I trie using an array but not sure how to implement it. My array looks like this (obviously I know it shouldn't be strings but not sure what data type or if even possible this way).
String [] mAnimations = {"Hinge","RollIn", "Landing",
"BounceIn", "BounceInDown", "BounceInLeft", "BounceInRight",
"BounceInUp", "FadeIn", "FadeInUp", "FadeInDown", "FadeInLeft",
"FadeInRight","FlipInX", "RotateIn", "RotateInDownLeft", "RotateInDownRight",
"RotateInUpLeft", "RotateInUpRight", "SlideInLeft", "SlideInRight",
"SlideInUp", "SlideInDown", "ZoomIn", "ZoomInDown", "ZoomInLeft",
"ZoomInRight", "ZoomInUp"};
Putting any of the correct animations by themselves it works fine (Note BounceInLeft):
YoYo.with(Techniques.BounceInLeft)
.duration(1000)
.playOn(textView);
But what I am trying to do is randomly pick an animation from the array something like this:
Random rand = new Random();
int n = rand.nextInt(mAnimations.length) + 1;
YoYo.with(Techniques.(mAnimations[n]))
.duration(1000)
.playOn(textView);
Thanks for your help
Nicholas
Best Directly Assign method based on Random numbers.Because (mAnimations[n]) value consider as String.
String [] mAnimations = {"Hinge","RollIn", "Landing",
"BounceIn", "BounceInDown", "BounceInLeft", "BounceInRight",
"BounceInUp", "FadeIn", "FadeInUp", "FadeInDown", "FadeInLeft",
"FadeInRight","FlipInX", "RotateIn", "RotateInDownLeft", "RotateInDownRight",
"RotateInUpLeft", "RotateInUpRight", "SlideInLeft", "SlideInRight",
"SlideInUp", "SlideInDown", "ZoomIn", "ZoomInDown", "ZoomInLeft",
"ZoomInRight", "ZoomInUp"};
Random rand = new Random();
int n = rand.nextInt(mAnimations.length);
if(n==0)
{
YoYo.with(Techniques.Hinge).duration(1000).playOn(textView);
}
if(n==1)
{
YoYo.with(Techniques.RollIn).duration(1000).playOn(textView);
}
I am trying to change the values of several TextView elements but iterating through an array list and adding these values. However I can't seem to find a way to change the R.id value that is used each time. For example:
for (int i=0; i<arrayList.size(); i++)
{
TextView t = (TextView) dialog.findViewById(R.id.value+(i));
t.setText(arrayList.get(i));
}
Where the values are in the format animals_eng1,animals_eng2 etc..
Any help appreciated.
Your best bet is to create an array containing the resource IDs of each text view and looping through them..
ex.
int[] textViewIds = new int[] { R.id.animals_eng1, R.id.animals_eng2, R.id.animals_eng3 };
Then in your activity you can loop through them and set the values like you desire
for (int i=0; i<arrayList.size(); i++)
{
((TextView)findViewById(textViewIds[i])).setText(arrayList.get(i));
}
You'll have to make sure your arrayList size is the same as the number of textview resource IDs you set or you'll end up with an out of bounds exception when looping
I don't know of a way to do exactly what you're asking, but here are two alternatives:
1.Create an array of Integers, and assign each element of the array to a different view id value
int[] ids = new int[arrayList.size()];
ids[0] = R.id.view0;
ids[1] = R.id.view1;
ids[2] = R.id.view2;
//...ids[n] = R.id.viewN; where n goes up to arrayList.size()
for (int i : ids){
((TextView)dialog.findViewById(ids[i])).setText(arrayList.get(i));
}
Note that the above method sorta defeats the point because you have to have a line for every TextView, if you want something more dynamic:
2.Tag your TextViews in your layout xml by adding android:tag="prefix0", for example, to each of your TextViews. Before the loop find the parent View of your layout, and then use the findViewWithTag method of that view within the for loop. From your code I'm guessing you're using a Dialog with a custom layout xml, so you'd first find the parent of that:
ViewGroup parent = dialog.findViewById(R.id.parent); //or whatever the name of your parent LinearLayout/RelativeLayout/whatever is
String commonPrefix = "prefix"; //or whatever you've tagged your views with
for (int i=0; i<arrayList.size(); i++){
TextView t = (TextView) parent.findViewWithTag(commonPrefix+i);
t.setText(arrayList.get(i));
}
One way to solve this would be putting your resource ids in an int array and getting the resource at index i.
TextView t = (TextView) dialog.findViewById(R.id.value+(i))
becomes
TextView t = (TextView) dialog.findViewById(resourceArray[i])
if all of your views are on the same container (and only them) , simply iterate over its children .
if not , you can add an array of ids (in res) and iterate over it .
Hi am developing android application. I have some small doubt of how to change one textview text when the other textview text got changed.
Let us say i have fourtext fields n1,n2 for displaying names and s1,s2 for displaying scores.n1=android1,n2=android2,s1=30,s2=50
After applying sort for scores(descending) am able to sort scores but the names still in same text view.how can i change when names too in this example.
After sort n1=android1,n2=android2,s1=50,s2=30
Thanks in advance...please respond soon if any knows how can i do this...
Suppose in your name array
String[] name={"yuvi","sachin","dravid","sehvag"};
int[] score={15,8,89,10};
for(int i=0;i<score.length;i++){
for(int j=i+1;j<score.length;j++){
if(score[i] < score[j]){
int tempsc=score[i];
String tempname=name[i];
score[i]=score[j];
name[i]=name[j];
score[j]=tempsc;
name[j]=tempname;
}
}
}
You can also try like this...
EditText[20] e1;
String[10] names;<----- array of your names
Int[10] scores;<----- array of your scores
String[10] temp;
for(int g=0;g<10;g++)
{
temp[g]=String.valueOf(scores[g])+"-"+names[g];
}
Arrays.sort(temp);
for(int g=0;g<10;g++)
{
String[] T=temp[g].split("-")
e1[g].setText(t[1]);<----- name
e1[g+10].setText(t[0]);<----- score
}
think this is much easy.. =]
I have a layout the contains 4 TextViews with ids: "Name1", "Name2", "Name3", "Name4"
I would like to iterate on them with a for loop,
is there any way to do this?
something like
for(int i = 1; i <= 4; i++)
{
findViewById(R.id."Name" + i)
}
I know that this code is far from being real, but any help?
Thank you!
Ron
No, you cannot do it like that because R.id.xyz is referencing a static int of a static class. It's not a string that can be concatenated like that. Also, your code ignores the return value of findViewById so it does nothing (though I realize you mentioned the code is far being real, but still an actual use case might help clarify what you're trying to do). R.id."Name" means nothing and will give you a compiler error.
To loop through you can do something like this:
int[] ids = {R.id.foo, R.id.bar};
then
for(int i = 0; i<ids.length; i++) {
View v = findViewById(ids[i]);
}
Sure you can do that sort of. You cannot access an member of R.id using a string literal you must type out the variable name.
R.id."Test" is no good but R.id.Test is fine.
If you examine the type of R.id.XYZ you will find that it is simply an integer. There is no reason why you cannot perform basic arithmetic on id values.
However it doesn't really make sense to do so. When you build your APK the compiler automatically creates a static class called R that contains references to the various resources and assets contained in your APK, such as layouts, drawables, sounds, etc..
Just because you know that the integer value for R.id.button1 is X there is no guarantee that the integer value for R.id.button2 will be X+1, in fact it could be anything.
If you want to create a list of TextViews to iterate over consider adding them to a List and then iterating over the list. Like so:
ArrayList<TextView> list = new ArrayList<TextView>();
list.add( (TextView) findViewById(R.id.textView1) );
list.add( (TextView) findViewById(R.id.textView2) );
list.add( (TextView) findViewById(R.id.textView3) );
list.add( (TextView) findViewById(R.id.textView4) );
int size = list.getSize();
for (int i=0; i< size; i++)
{
TextView tv = list.get(i);
// Do something with tv like set its label to i
tv.setText(Integer.toString(i));
}
I want to work dynamically therefore I want to bind text views dynamically I think an example would explain me the best
assuming I want to bind 7 image views i can do it like this :
Country = (EditText)findViewById(R.id.CountryEditText);
City = (EditText)findViewById(R.id.CityEditText);
LivinigCreture = (EditText)findViewById(R.id.LivingCretureE);
Nature =(EditText)findViewById(R.id.NatureEditText);
Inanimate = (EditText)findViewById(R.id.InanimateEditText);
KnowenPersonality = (EditText)findViewById(R.id.KnowenPersonalityEditText);
Occupation = (EditText)findViewById(R.id.OccupationEditText);
but lets change 7 with NUMOFFILEDS as a final where i want to do the previous ?
myImages = new ImageView [7];
for (int i = 0; i<7;i++,????)
myImages[i] = (ImageView)findViewById(R.id.initialImageView01);
notice : in my R file the R.id.initialImageView01 - R.id.initialImageView07 are not generate in a cont gap between them therefore I don't know how to make this architecture possible .
and if there's a way can someone show me an example how to work dynmiclly (like using jsp on android combined way or something ?)
id its possiable to do so constant times is it possible to build an the same xml constant num of times like jsp does
thank u pep:)
You can store the IDs themselves in an array at the beginning of your Activity; that way you'll only need to write them once and you can index them afterwards.
Something like:
int[] initialImageViewIds = {
R.id.CountryEditText,
R.id.CityEditText,
R.id.LivingCretureE,
R.id.NatureEditText,
R.id.InanimateEditText,
R.id.KnowenPersonalityEditText,
R.id.OccupationEditText
};
Then you can access them with:
myImages = new ImageView [7];
for (int i = 0; i<7;i++) {
myImages[i] = (ImageView)findViewById(initialImageViewIds[i]);
}
If that's not enough and you really want to get the IDs dynamically, I suppose you can use reflection on the R.id class, possibly with something like R.id.getClass().getFields() and iterate on the fields to check if their names interest you. Check reference for the Class class, too.