Develop Reference

Android get view ID based on it's tag

Is there any way to get the ID as in, findViewById(R.id.tableLayout), based on it's XML tag?
For example the Java equivalent of something along these lines:
GET $id OF view WHERE 'tag' IS n
Sorry that looks more like SQL, but I thought it would make my question clearer.
I want to be able to find a view based on it's tag and then convert it to a button using something like this.
Button b = (Button) findViewById(android.R.id.button1);

You could just use View#findViewWithTag("someTag") to reference the view then get the id from the view.
View view = findViewWithTag("someTag");
int id = view.getId();
Same thing for a button
Button b = (Button) findViewWithTag("someTag");
int id = b.getId();
references:
http://developer.android.com/reference/android/view/View.html#findViewWithTag(java.lang.Object)
http://developer.android.com/reference/android/view/View.html#getId()
Edit: If your in an activity (inside onCreate) you could get do this
// create the Activity's view
View root = LayoutInflater.from(this).inflate(R.layout.myLayout, null);
// set the view
setContentView(root);
// find another view by the tag of the root view
Button b = (Button) root.findViewWithTag("someTag");

Dynamic variables in a for loop?

I've got a layout which is called activity_main.xml which is my parent layout, and I am then inserting a child layout (activity_main_card.xml) within a for loop.
I also have an array, and what I am doing is using the length of the array to determine how many child elements it should create. All of my data to be used in the child element is stored in the array, so the idea is to loop through the array, create a child element for each loop and populate the data.
Instead, what is currently happening is that it is generating the 3 (length of array) child elements, but it is only populating the first one with the latest content in the array. This is because it keeps the variables the same.
What I need to do is somehow set dynamic variables that change as the loop iterates.
The code for my method is as follows:
for (int i = 0; i < cardArray.length; i++) {
LinearLayout item = (LinearLayout)findViewById(R.id.card_holder);
View child = getLayoutInflater().inflate(R.layout.activity_main_card, item, false);
item.addView(child);
//Set objects from array to variables
String cardTitle = cardArray[i][0];
String cardContent = cardArray[i][1];
String cardImage = cardArray[i][2];
//Set XML elements to variables
TextView title = (TextView) findViewById(R.id.card_title);
TextView content = (TextView) findViewById(R.id.card_content);
ImageView image = (ImageView) findViewById(R.id.card_image);
//Load variable content into card layout
title.setText(cardTitle);
content.setText(cardContent);
image.setImageDrawable(getResources().getDrawable(getResources().getIdentifier("drawable/" + cardImage, "drawable", getPackageName())));
}
What I thought I could do was to set the views like:
TextView title[i] = (TextView) findViewById(R.id.card_title);
however this doesn't work. Does anyone know how I can acheive this?

You need to get a reference to the current View you just created and then populate the TextView elements on that View. This is achievable by doing this:
TextView title = (TextView) child.findViewById(R.id.card_title);
TextView content = (TextView) child.findViewById(R.id.card_content);
ImageView image = (ImageView) child.findViewById(R.id.card_image);
You might be better off approaching this problem differently however, as Jonathan suggests a ListView and adapter might suit better for this situation.

You aren't using the View created, you are using the root layout of the activity in every loop because you apply the findViewById in the parent view:
Change:
TextView title = (TextView) findViewById(R.id.card_title);
By;
TextView title = (TextView) child.findViewById(R.id.card_title);

Issue with dynamically added android radiobutton

I have an android app which asks a question followed by x number of options. Each option contains a textview, ImageView and a radio button.
The value of x (i.e. the number of options) is not constant. I want to dynamically add UI content to satisfy this requirement.
This I am doing using the following code
LayoutInflater inflater=(LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
LinearLayout linearLayoutThis = (LinearLayout)findViewById(R.id.lladrList);
for (int i =0 ;i< options.length; i++){
LinearLayout lladroption=(LinearLayout)inflater.inflate(R.layout.adroption, null);
//get view id and set values
ImageView iv = (ImageView) lladroption.findViewById(R.id.ivadroption);
iv.setId(OPTIONIMAGE+i);
iv.setImageBitmap(downloadFile(options[i].getOptionData().getDataURL()));
((ViewGroup) iv.getParent()).removeView(iv);
iv.setOnClickListener(this);
linearLayoutThis.addView(iv);
RadioButton rb = (RadioButton) lladroption.findViewById(R.id.rbadroption);
rb.setOnClickListener(this);
rb.setId(OPTIONRADIOBUTTON+i);
rb.setText(options[i].getOptionString());
((ViewGroup) rb.getParent()).removeView(rb);
linearLayoutThis.addView(rb);
// rg.addView(rb);
}
I want the radiobuttons to belong to a particular radiogroup. But if I do a
rg.addView(rb) instead of linearLayoutThis.addView(rb); in the above code where rg is the radiogroup view ... all the radiobuttons are display in one go. Instead of displaying text,image,radiobutton,text,image,radiobutton,text,image,radiobutton I get text,image,text,image,text,image,radiobutton,radiobutton,radiobutton.
Does anyone know how to resolve this?

You dont have to add those dynamically. create a view group or layout with the textview image and the radio button you require. use listview to get the x number of options. If this is your requirment you can reply so that i can help you with it.

unable to get text of other textview in android?

I am having a dynamic table in which I have created lots of textview dynamically... actually I having one row in which I have 3 textview... in this one of them contains unique id but other's textview value repeats around the table... therefore on the click of other textview I need text from unique textview.... so please suggest some thing like getting text from the neighbor textview... line through which I am able to get text from the textview is following.
((TextView)v).getText().toString();

When creating dynamic TextViews assign a reference to the unique TextView as a tag using setTag to each of them.
TextView uniqueTextView = (TextView)findViewById(R.id.unique_id);
TextView neighbourView = new TextView();
neighbourView.setTag(uniqueTextView);
You can later get the reference back using getTag
public void onTextViewClick(TextView view) {
TextView uniqueTextView = (TextView)view.getTag();
String text = uniqueTextView.getText().toString();
}

Setting up RelativeLayout in java code

I'm having a hard time getting two text views to appear on top of each other in my java code. Here's the code I'm experimenting with:
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
layout = new RelativeLayout(this);
text1 = new TextView(this);
text1.setText("1");
text2 = new TextView(this);
text2.setText("2");
RelativeLayout.LayoutParams p = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
RelativeLayout.LayoutParams q = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
q.addRule(RelativeLayout.BELOW, layout.getId());
text1.setLayoutParams(q);
layout.addView(text1);
p.addRule(RelativeLayout.BELOW,text1.getId());
text2.setLayoutParams(p);
layout.addView(text2);
setContentView(layout);
}
This stacks the two text views on the same line, but I want TextView text2, to appear below TextView text1, so in my app I want the following to appear as the output:
1
2
I've tried all sort of things with the "addRule" method, I'm not sure why this isn't working. I want to know how to do this without XML because I plan to build a library of methods that can build up a layout that is easily adjustable through editing an array.

Your TextViews don't have an id (by default the id is -1)... put this after their initialization:
text1.setId(1111); // 1111 is just an example,
text2.setId(2222); // just make sure the id are unique

I don't think you are looking to layout the text1 view below the RelativeLayout since you added all your views to it as children, right? Try removing the first rule; that rule is asking the text view to be below the same view it is in.
EDIT: Also a help is explicitly setting the id of the view you are laying out relative to.
So here:
text1.setId(2);
p.addRule(RelativeLayout.BELOW,2);

you can use xml layout for this :
in relative layout
u set the first textview and assign it some id
fot the next text view we can assign parameter
android:layout_below="id of above text view"
in this way we get 2nd text view below 1st text view