My question is how to set a textView style after adding it dynamically.
Here is the code:
LinearLayout layout = (LinearLayout)findViewById(R.id.linarLay);
TextView textView = new TextView(this);
textView.setText("TEST1");
layout.addView(textView);
I can see the text view that has been added but.. I need to style it now..
So far I tried this:
textView.setTextAppearance(getApplicationContext(),R.style.textStyle);
I tried this code after layout.addView(textView); and before it is just same doesn't change a thing..
Any idea/solution would be appreciated... Thanks
Style doesn't change because though you use the same TextView object to set style after adding it to Layout,it is not a part of layout. You have to get the View added,from layout using its id and when you change its style,it would directly be affected to your view on Layout.
Try this: (I have not tested but *should work)
LinearLayout layout = (LinearLayout)findViewById(R.id.linarLay);
TextView textView = new TextView(this);
textView.setText("TEST1");
textView.setId(999); // give some id
layout.addView(textView);
TextView tv=(TextView)findViewById(999);
tv.setTextAppearance(getApplicationContext(),R.style.textStyle);
I had a similar problem. I wanted to do the same with a button. You can set every property programmatically.
You can create a class with a set of methods like the one below:
private void setButtonStyle(Button b, String text)
{
LayoutParams param = new LinearLayout.LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.MATCH_PARENT, 1.0f);
b.setBackgroundDrawable(context.getResources().getDrawable(R.drawable.blue_button));
b.setGravity(Gravity.CENTER);
b.setText(text);
b.setLayoutParams(param);
b.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 20);
b.setTypeface(null, Typeface.BOLD);
b.setShadowLayer(2, 1, 1, R.color.button_shadow_colour);
b.setTextColor(context.getResources().getColor(R.color.button_text_colour));
}
As you can see it is possible to set everything you need. As an example the param variable has 3 arguments in its contructor which are layout_width, layout_height and weight. So you can do the same with TextView.
deprecated since API 23:
textView.setTextAppearance(getContext(), R.style.Headline);
so choose:
textView.setTextAppearance(R.style.Headline);
Related
I have a calendar view with events inside a table. An event is created with a LinearLayout and a textview inside:
LinearLayout ll = new LinearLayout(context);
ll.setOrientation(LinearLayout.VERTICAL);
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
//My label
TextView label = new TextView(context);
label.setEllipsize(TruncateAt.END);
label.setPadding(4, 0, 0, 10);
label.setText(text);
ll.addView(label, layoutParams);
When I add my LinearLayout to the calendar view, I got this:
My label is cutted off because of the linearlayout height. I dont want to change the height of my event. So I have set the property ellipsize with TruncateAt.END in my label in order to avoid this issue, but the problem persists. How can I have my label truncated at the end with (...)?
Add setIncludeFontPadding() to your TextView...this will remove all default padding from TextView.
label.setIncludeFontPadding(false);
One more thing, you have added ellipsize to your TextView but you didn't specify the length of the TextView after which the ellipsize should take effect. You can set that condition using any one of the following...
label.setSingleLine(true);
or
label.setMaxLines(2); //here maximum line 2
I am new with android. I have add textview dynamically in .java file with text apple but I want to add it on the top. How can I do that.
This is my code......in .jave file
TextView lblname;
LinearLayout linearlayout;
lblname = new TextView(this);
linearlayout = (LinearLayout) findViewById(R.id. linearlayout);
linearlayout.addView(lblname);
Thank You in advance..
modify your last line to:-
linearlayout.addView(lblname, index);
replace index with the position you want to add the view i.e, 0 if in the beginning or linearlayout.getChildCount()-1 if prior to the last view in you layout
Try this
lblname = new TextView(this);
lblname.setText("APPLE");
lblname.setId(5); // id should be unique
lblname.setLayoutParams(new LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
linearlayout.addView(lblname,index);//specify your index
Simply specify the index where you want to add the child, as a second parameter for the addView.
For example, to add it at the top:
linearlayout.addView(lblname, 0);
See reference:
http://developer.android.com/reference/android/view/ViewGroup.html#addView(android.view.View, int)
I am adding dynamic text view to view flipper like below.
Everything is working perfectly, but how can i center each text view at center of View Flipper, i have looked for the gravity option but i think it doesn't support. As the text view contains different text length i want every text view to be at center of view flipper.
for(int i = 0; i < 10; i++){
TextView tv = new TextView(this);
vf.addView(tv, i);
}
Thanks
I think this may help :
ViewFlipper flipper = new ViewFlipper(this);
TextView textView = new TextView(this);
textView.setGravity(Gravity.CENTER);
textView.setText("Hello World");
flipper.addView(textView);
setContentView(flipper);
Are you talking about gravitiy we can set this way, or a layout gravity you have tried actually?
tv.setGravity(Gravity.CENTER);
Try to set ViewFlippers width in xml as
android:layout_width="wrap_content"
I had an similar problem and this worked fine.
You can do this way,
TextView tv = new TextView(this);
LinearLayout.LayoutParams param = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
param.gravity = Gravity.CENTER;
tv.setLayoutParams(param);
Ok i got the answer, actually you need to add linearlayout to viewflipper then add children to linearlayout with giving gravity parameter to linear layout.
my TextView that I add to my LinearLayout is not visible...why ?
layoutVenues = (LinearLayout) findViewById(R.id.layoutv);
layoutVenues.addView(genTextView(v.getName()));
layoutVenues.addView(genLineView());
and the genTextView Method:
public TextView genTextView(String text) {
TextView tv = new TextView(this);
tv.setText(text);
tv.setTextColor(Color.BLACK);
return tv;
}
You need to set layout parameters otherwise you will not have a proper layout
public TextView genTextView(String text) {
TextView tv = new TextView(this);
LayoutParams lp = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutPararms.WRAP_CONTENT);
tv.setLayoutParams(lp);
tv.setText(text);
tv.setTextColor(Color.BLACK);
return tv;
}
Try to add visiblity to your view. .setVisibility(View.VISIBLE);
or place it in your xml and instantiating in the code will also be good idea.
I build most of my view hierarchies for Android using XML layout files, so I'm not an expert on programmatically assembling view hierarchies. However, one thing that jumps out at me is that you don't appear to set any layout parameters on the TextView that is returned by genTextView(). Also, take a look at the layout parameters of the LinearLayout in your XML file and make sure that it is actually getting assigned screen real estate.
The default background is black I believe? So you have black text on a black background. Its probably not that easy though :P Might want to post the xml where the linearlayout is defined.
I want to create a relative Layout dynamically through code with 2 Textviews one below the other.How to implement android:layout_below property through code in Android.
can anyone help me in sorting out this issue.
Thanks in Advance,
final TextView upperTxt = (...)
upperTxt.setId(12345);
final TextView lowerTxt = (...);
final RelativeLayout.LayoutParams params = RelativeLayout.LayoutParams(this, null);
params.addRule(RelativeLayout.BELOW, 12345);
lowerTxt.setLayoutParams(params);
Here is my solution for my special Problem.
In case the username wouldn't be found in the db i had to create a RelativeLayout that looks like the xml-generated one.
// text view appears on top of the edit text
enterNameRequest = new TextView(mainActivity.getApplicationContext());
// fill the view with a string from strings.xml
enterNameRequest.setText(mainActivity.getResources().getString(R.string.enterNameRequest));
// edit text appears below text view and above button
enterName = new EditText(mainActivity.getApplicationContext());
enterName.setId(667);
// button appears at the bottom of the relative layout
saveUserName = new Button(mainActivity.getApplicationContext());
saveUserName.setText(mainActivity.getResources().getString(R.string.useUserName));
saveUserName.setId(666);
// generate the relative layout
RelativeLayout layout = new RelativeLayout(mainActivity.getApplicationContext());
layout.setId(668);
// set a background graphic by its id
layout.setBackgroundDrawable(mainActivity.getApplicationContext().getResources().getDrawable(R.drawable.background_head_neutral));
// runtime told me that i MUST use width and height parameters!
LayoutParams params2 = new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);
params2.addRule(RelativeLayout.ABOVE, 666);
enterName.setLayoutParams(params2);
LayoutParams params3 = new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);
params3.addRule(RelativeLayout.ABOVE, 667);
enterNameRequest.setLayoutParams(params3);
LayoutParams params4 = new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);
params4.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, 668);
saveUserName.setLayoutParams(params4);
// add views
layout.addView(enterNameRequest);
layout.addView(enterName);
layout.addView(saveUserName);
/* todo: set button action */
mainActivity.setContentView(layout);
What i found out additionally:
It is not so good to manipulate the layout manually from within java!
You should better use a new Activity and set a new layout in it.
This way, the application-code is readable a lot better!
I even tried to set several layouts (not manually, but wit setContentView) in one activity, and it turned out that i didn't know where what was accessing what else... Also, i had a great problem in adding onClickListeners... so you better use -- android:onClick="myButtonMethod" -- in your button tag in the xml and have a method in your according activity, which uses the layout, like this:
public void myButtonMethod(View v){
// do stuff
}
This improves performance because you are not using additional Listeners - but you use the already available Listener that is bound to your activity in every case.
u can try this
LinearLayout.LayoutParams leftMarginParams = new LinearLayout.LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);``
leftMarginParams.leftMargin = 50;
Button btn1 = new Button(this);
btn1.setText("Button1");
linLayout.addView(btn1, leftMarginParams)