Develop Reference

Should I prefer rendering layout at run time or Include it in XML layout?

I need to show a "No data found" message on many screens in my app. For that I created a separate layout with message and image; Now,I'm not sure whether I should include that layout in all other activities' layout or render this layout at runtime? What would be more efficient? Any suggestion is appreciable.
Thanks;

I use a textview with text : "No data found" in all layouts and set VISIBILITY GONE or VISIBLE according to api result.
Or you can add view to your main layout if no data found. Like this;
public showAlert(LinearLayout layout){
TextView textView= new TextView(context);
textView.setText("No data found");
layout.addView(textView);
}
Write this function in a class and call everywhere you want

Android : How to adjust Textview

Hello i am trying to display the content i receive in an activity using TextView but it seems that TextView is overlapping a button that i have put in activity's UI.My goal is to put TextView and the button side by side. I have put the TextView in the UI dynamically like this:
String display = extras.getString("EXTRA_MESSAGE");
TextView textView = new TextView(this);
textView.setTextSize(40);
textView.setWidth(20);
textView.setHeight(20);
textView.setText(display);
setContentView(textView);
I know i miss something but i cant find what it is,so can you please suggest a way how to fix that?
Thanks a lot in advance!

When you call setContentView(textView); it changes your layout to just the textView so it isn't overlapping your Button but your Button isn't shown anymore. You need to add it to your layout and put it where you want it.
You can do this by getting a reference to your root View in your xml and calling addView(textVie) on that root View and use addRule() to position your TextView where you want. However, if it isn't necessary to add your TextView dynamically then it is much easier to declare it in your xml.
If you do want to add it dynamically still, then this SO answer, and many more, covers it.

Dynamically add layout on button click and get text from the layout?

So I have a layout that gets added to the main layout every time the user presses a button. I got that working fine, but that layout happens to consist of several EditTexts. What would be the best way to get the text from the EditText? I only have the id of the layout itself, not the EditTexts inside the layout.
I thought of just adding EditTexts dynamically one by one, but is there a more efficient way of doing it? I'd much rather just inflate an xml layout every the button is clicked.

I assume you're adding new views by inflating them and then adding them to the main view similar to below.
LinearLayout newView = (LinearLayout)this.getLayoutInflater().inflate(R.layout.my_layout, null);
LinearLayout mainView = (LinearLayout)this.findViewById(R.id.mainLayout);
mainView.addView(newView);
You can use findViewById() on the newView to access each EditText as required.
EditText editText = (EditText) newView.findViewById(R.id.myButton);
String text = editText.getText().toString();

Since it's a fixed layout you inflate from a particular XML file, you can also use getChildAt(int index) to find a particular view of the ViewGroup.

Dynamiclly add a textview using existing textview layout parameters

I am trying to add a TextView from the activity when a button has been pressed. I have found how to add a new textview from the activity, however instead of coding the required layout parameters is it possible to copy an existing textviews parameters (in the xml layout) to the new textview?
I have tried:
TextView tv1 = new TextView(this);
TextView tv2 = (TextView) findViewById(R.id.basetext);;
// its this line below which doesn't work
tv1.setLayoutParams(tv2.getLayoutParams());
But it doesn't copy any of the layout parameters...
Any ideas?

You can do One thing.
If you are trying to set just the Value of the Same TextValue every time and if the Layout properties of that TextView is same at all the time then follow below steps:
First Create the One Layout that only contain he TextView layout only with your appropriate properties. (Let name it as layout_textView.xml)
Now, do add that layout_textView.xml dynamically to your main view as per your requirement.
How it will Solve your issue.
If any query then let me know.

Did you call requestLayout() after adding the textview?

Android TextView and null pointer exception

Why is
TextView test = (TextView) findViewById(R.id.testTextView);
test.getText();
generating a null pointer exception? The id is correct, testTextView is correctly declared in my XML layout file.

The only reason for findViewById to return null if you are passing a valid id is that you are either setting the wrong content view (with setContentView) or not setting a content view at all.

I think you might have written setContentView(..) after defining the TextView. Reverse these, and it should work.
Change:
TextView test = (TextView) findViewById(R.id.testTextView);
.
.
setContetView(..)
To:
setContetView(..)
.
.
TextView test = (TextView) findViewById(R.id.testTextView);

You probably haven't called setContentView. You can only use findViewById to get elements of views that have already been inflated.
You could also use a layoutinflater to inflate the view, but that's probably not what you want.

Are you sure the TextView is set on the right XML?
For example if you're creating a Dialog that loads a custom XML, to get an element from that xml you have to mention it in dialog.findViewById(R.id.testTextView);
Like Falmarri said, the view has to be inflated.
I understand you solved it by creating a new project, but still thought to mention it for future users.

It can also be that you defined the activity in two files. For example layout and layout-v21 and some information like id is missing on one of them. So check all the activity's layouts

In my case, the layout was not finished inflating. Solved by adding a small delay before trying to access the TextView.
new Handler(Looper.getMainLooper()).postDelayed(new Runnable() {
#Override
public void run() {
TextView test = (TextView) findViewById(R.id.testTextView);
test.getText();
}
}, 100);

I struggled with this for a while and what I realized was, that, if you have more than one layout file version like:
"activity_one.xml" in "layout" folder and one in "layout - small" folder
Which I used for multiple phone layout support, the problem was that one of the TextViews was in both, with the exact same ID and everything, however the difference was that one was higher up in the hierarchy of views in the layout.
When I changed them to be in the same spot it worked.
(I know this is already answered, but maybe this helps someone out there. Very rare though.)