I need to be able to add a textview to my app with code, not using the XML or Graphic interface...
I have an imageview, but cannot figure out how to modify it to get a Textview (Im new to Android)...
Here is my imageview code:
//Add view using Java Code
ImageView imageView = new ImageView(AndroidAddViewActivity.this);
imageView.setImageResource(R.drawable.icon);
LayoutParams imageViewLayoutParams
= new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
imageView.setLayoutParams(imageViewLayoutParams);
mainLayout.addView(imageView);
TextView textView = new TextView(this);
textView.setText("the text");
LayoutParams textViewLayoutParams = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
textView.setLayoutParams(textViewLayoutParams);
mainLayout.addView(textView);
You can do so with the following:
TextView textView = new TextView(this);
textView.setText("the text");
You can add like
TextView nameHere = new TextView(this);
nameHere.setText("your text here");
This is just simple line of code you can modify it to do much more :)
Related
I have image and text that I want to put on my app.
I need the text to be centered over the image.
Everything is done programmatically with RelativeLayout Object.
For some reason, I only succeed to center the TextView over the ImageView vertically.
This is the function that creates the RelativeLayout:
private void buildPost(Context context){
Random rnd = new Random();
SquareImageView postBgImgIV = new SquareImageView(context);
postBgImgIV.setBackgroundColor(Color.argb(255, rnd.nextInt(256), rnd.nextInt(256), rnd.nextInt(256)));
postBgImgIV.setImageResource(R.drawable.clear);
TextView postContentTV = new TextView(context);
postContentTV.setText(this.postContent);
postContentTV.setTextSize(42);
//postContentTV.setTextAlignment(View.TEXT_ALIGNMENT_CENTER);
postContentTV.setGravity(Gravity.CENTER);
post = new RelativeLayout(context);
post.addView(postBgImgIV);
post.addView(postContentTV);
}
I sure that I missing something and it can't solve with few lines of code.
I will love to get help :)
Problem Solved!
Actully I needed to define new RelativeLayout.LayoutParams and then difiene the textView LayoutParams as the new RelativeLayout.LayoutParams.
The code it:
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.FILL_PARENT, RelativeLayout.LayoutParams.FILL_PARENT);
params.addRule(RelativeLayout.CENTER_IN_PARENT);
postContentTV.setLayoutParams(params);
You need to add layout params to the textview
TextView textView = new TextView(context);
RelativeLayout.LayoutParams lp=new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
lp.addRule(RelativeLayout.CENTER_IN_PARENT);
textView.setLayoutParams(lp);;
I need to set TextView centered on a ImageButton, but using code. I can set a text on, but I can't center it.
code:
RelativeLayout rLayout = new RelativeLayout(this);
TextView textView = new TextView(this);
textView.setText("text");
textView.setTextSize(25);
textView.setGravity(Gravity.CENTER);
final ImageButton iButton = new ImageButton(this);
iButton.setImageResource(R.drawable.button);
iButton.setBackgroundColor(Color.TRANSPARENT);
rLayout.addView(iButton);
rLayout.addView(textView);
linear.addView(rLayout);
This code set text on imageButton, but set it in left-top.
It's kind of unclear what you're asking...but if I'm understanding correctly, you have to set the RelativeLayout.LayoutParams on the TextView before adding it to the parent. Also, you have to add the rule RelativeLayout.CENTER_IN_PARENT.
So, something like:
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(size, size)
params.addRule(RelativeLayout.CENTER_IN_PARENT)
textView.setLayoutParams(params)
Or some other combination of rules that fit your usecase.
so try
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.FILL_PARENT);
params.weight = 1.0f;
params.gravity = Gravity.CENTER;
iButton.setLayoutParams(params);
I need to be able to add a layout to my main layout from xml file many times programatically.
The problem is handling assigning ids of the new layout's views. See the code:
MainFragment.java
private int belowOfWhat = R.id.layout_header;
...
onActivityResult:
LayoutInflater myInflater = LayoutInflater.from(getContext());
RelativeLayout layout = (RelativeLayout) myInflater.inflate(R.layout.assignment_layout, null, false);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,ViewGroup.LayoutParams.WRAP_CONTENT);
//here problems start
//i want to position the new layout below the previously created layout
params.addRule(RelativeLayout.BELOW, belowOfWhat);
layout.setLayoutParams(params);
mRelativeLayout = rootView.findViewById(R.id.to_do_layout);
mRelativeLayout.addView(layout);
belowOfWhat = generateViewId();
idsOfToDos.add(belowOfWhat);
CheckBox assignmentCheckbox = (CheckBox)
//assignment_checkbox is an id of checkbox in the xml layout I add
rootView.findViewById(R.id.assignment_checkbox);
assignmentCheckbox.setId(belowOfWhat);
assignmentCheckbox.setText(mToDoInfo);
I don't know where the problem is, so here is how the app works now: I add a new layout, it gets positioned correctly below layout_header.
But when I add the second or more layouts they overlap each other on top of the app instead of being positioned one below the other.
I'd appreciate if you guided me to the solution of the problem.
If you don't need views'ids for other purposes you could solve more simple.
If I've understood what you are trying to do, what you need is a vertical LinearyLayout instead of a RelativeLayout, then subviews will be added one below each other
You have to use Relative Layout and use the following properties with that to align the views.
RelativeLayout.BELOW
RelativeLayout.RIGHT_OF
RelativeLayout.ALIGN_BOTTOM
RelativeLayout layout = new RelativeLayout(this);
RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
layout.setLayoutParams(layoutParams);
RelativeLayout.LayoutParams params1 = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
RelativeLayout.LayoutParams params2 = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
RelativeLayout.LayoutParams params3 = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
RelativeLayout.LayoutParams params4 = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
TextView tv1 = new TextView(this);
tv1.setId(1);
tv1.setText("textView1");
TextView tv2 = new TextView(this);
params2.addRule(RelativeLayout.RIGHT_OF, tv1.getId());
tv2.setId(2);
tv2.setText("textView2");
TextView tv3 = new TextView(this);
params3.addRule(RelativeLayout.BELOW, tv1.getId());
tv3.setId(3);
tv3.setText("textView3");
TextView tv4 = new TextView(this);
params4.addRule(RelativeLayout.RIGHT_OF, tv3.getId());
params4.addRule(RelativeLayout.ALIGN_BOTTOM, tv3.getId());
tv4.setId(4);
tv4.setText("textView4");
layout.addView(tv1, params1);
layout.addView(tv2, params2);
layout.addView(tv3, params3);
layout.addView(tv4, params4);
hope so it gives you an idea how to align views pragmatically.
I want to create more then one TextView based on the condition of a for loop.
how to do it programmatically?
Template :
app name: facebook
duration: 2
app name: messaging
duration: 4
app name: temple run
duration: 2
You can just create a TextView like this:
TextView myTextView = new TextView(this);
myTextView.setText("A TextView");
then you can add this view to your layout
Add an id field in layout in xml. Take reference of layout in your class. Create views and add it to layout.
LinearLayout linearLayout = (LinearLayout) findViewById (R.id.YourID);
TextView textView = new TextView (this);
textView. setText ("YourText");
linearLayout. addView (textView);
You can use this code to create text view programmaticaly:
TextView mTextView = new TextView(this);
LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
mTextView.setLayoutParams(params);
rootView.addView(mTextView, 0);
What I understoond:
You have two array 1.appname 2. duration then try following code.
LinearLayout linearLayout = (LinearLayout) findViewById(R.id.YourID);
for (int i = 0; i < appname.length; i++)
{
TextView textAppname = new TextView(this);
TextView textDuration = new TextView(this);
LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT);
textAppname.setLayoutParams(params);
textDuration.setLayoutParams(params);
textAppname.setText(appname[i]);
textDuration.setText(duration[i]);
linearLayout.addView(textAppname);
linearLayout.addView(textDuration);
}
In my app. there is activity contain multiple linear layout and divider which created programmatically , its run fine ,
but i have to duplicate the linear layout and divider 5 times ,and all are the same except two things :
1- each linear layout has different string .
2- first divider margin differ than others divider margin .
is there's better approach to do that with more clean and shorter code .
any help will be much appreciated .
public class Dreams extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Boolean customTitleSupported =
requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
setContentView(R.layout.trip);
if (customTitleSupported) {
getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE,R.layout.custom_title);
}
TextView tv = (TextView) findViewById(R.id.title);
tv.setTypeface(FontFactory.getOldEnglish(getBaseContext()));
tv.setText("Dreams");
LinearLayout ll = (LinearLayout)findViewById(R.id.linearLayout);
// add text view
TextView tv1 = new TextView(this);
tv1.setGravity(Gravity.RIGHT);
tv1.setTextSize(30);
tv1.setTypeface(FontFactory.getOldEnglish(getBaseContext()));
ll.addView(tv1);
tv1.setText(Html.fromHtml(getString(R.string.dreams)));
ImageView divider1 = new ImageView(this);
LinearLayout.LayoutParams lp1 =
new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, 5);
lp1.setMargins(40, 0, 40, 0);
divider1.setLayoutParams(lp1);
divider1.setBackgroundColor(Color.RED);
ll.addView(divider1);
TextView tv2 = new TextView(this);
tv2.setGravity(Gravity.RIGHT);
tv2.setTextSize(30);
tv2.setTypeface(FontFactory.getOldEnglish(getBaseContext()));
ll.addView(tv2);
tv2.setText(Html.fromHtml(getString(R.string.dream_1)));
ImageView divider2 = new ImageView(this);
LinearLayout.LayoutParams lp2 =
new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, 5);
lp2.setMargins(10, 10, 10, 10);
divider2.setLayoutParams(lp2);
divider2.setBackgroundColor(Color.RED);
ll.addView(divider2);
TextView tv3 = new TextView(this);
tv3.setGravity(Gravity.RIGHT);
tv3.setTextSize(30);
tv3.setTypeface(FontFactory.getOldEnglish(getBaseContext()));
ll.addView(tv3);
tv3.setText(Html.fromHtml(getString(R.string.dream_2)));
ImageView divider3 = new ImageView(this);
LinearLayout.LayoutParams lp3 =
new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, 5);
lp3.setMargins(10, 10, 10, 10);
divider3.setLayoutParams(lp3);
divider3.setBackgroundColor(Color.RED);
ll.addView(divider3);
TextView tv4 = new TextView(this);
tv4.setGravity(Gravity.RIGHT);
tv4.setTextSize(30);
tv4.setTypeface(FontFactory.getOldEnglish(getBaseContext()));
ll.addView(tv4);
tv4.setText(Html.fromHtml(getString(R.string.dream_3)));
ImageView divider4 = new ImageView(this);
LinearLayout.LayoutParams lp4 =
new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, 5);
lp4.setMargins(10, 10, 10, 10);
divider4.setLayoutParams(lp4);
divider4.setBackgroundColor(Color.RED);
ll.addView(divider4);
TextView tv5 = new TextView(this);
tv5.setGravity(Gravity.RIGHT);
tv5.setTextSize(30);
tv5.setTypeface(FontFactory.getOldEnglish(getBaseContext()));
ll.addView(tv5);
tv5.setText(Html.fromHtml(getString(R.string.dream_4)));
ImageView divider5 = new ImageView(this);
LinearLayout.LayoutParams lp5 =
new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, 5);
lp5.setMargins(10, 10, 10, 10);
divider5.setLayoutParams(lp5);
divider5.setBackgroundColor(Color.RED);
ll.addView(divider5);
TextView tv6 = new TextView(this);
tv6.setGravity(Gravity.RIGHT);
tv6.setTextSize(30);
tv6.setTypeface(FontFactory.getOldEnglish(getBaseContext()));
ll.addView(tv6);
tv6.setText(Html.fromHtml(getString(R.string.dream_5)));
ImageView divider6 = new ImageView(this);
LinearLayout.LayoutParams lp6 =
new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, 5);
lp6.setMargins(10, 10, 10, 10);
divider6.setLayoutParams(lp6);
divider6.setBackgroundColor(Color.RED);
ll.addView(divider6);
}
}
Since all that is changing is the TextView setText() you can make this a for loop with a list of String inputs. For example:
LinearLayout ll = (LinearLayout)findViewById(R.id.linearLayout);
String[] textEntries = { getString(R.string.dream),
getString(R.string.dream_1),
getString(R.string.dream_2),
getString(R.string.dream_3),
getString(R.string.dream_4),
getString(R.string.dream_5)
};
for ( int i = 0; i < textEntries.length; i++)
{
TextView tv = new TextView(this);
tv.setGravity(Gravity.RIGHT);
tv.setTextSize(30);
tv.setTypeface(FontFactory.getOldEnglish(getBaseContext()));
ll.addView(tv);
tv.setText(Html.fromHtml(textEntries[i]));
ImageView divider = new ImageView(this);
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, 5);
lp.setMargins(10, 10, 10, 10);
divider.setLayoutParams(lp);
divider.setBackgroundColor(Color.RED);
ll.addView(divider);
}
first of all it would be easier if you define your layouts in XML instead of adding them programmatically. You will profit from the benefits of the UI editor as well. :)
Second, you may want to use ListView and an Adapter to fill the list, since you do not want do duplicate the same tasks for each layout.
Maybe these two links are helpful:
1. http://developer.android.com/guide/topics/ui/declaring-layout.html
2. http://developer.android.com/guide/topics/ui/layout/listview.html
So, to finally answer your question, I would do the following:
Create a file, e.g. list_item.xml, with something like:
<LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:padding="10dp"><TextView your attributes.../></LinearLayout>
Create another layout, for instance main.xml, which contains a ListView. You can change the color of the divider like described here How to change the divider color in the listview?.
In your code (activity or fragment) add the main.xml as content view via setContentView().
Also in your code you should then add an adapter to the ListView which then populates the list for you. Here is an example How to customize listview using baseadapter
Finally, and since you separate the concerns (design and code), you could achieve what you want with just a few lines in your activity (the layout stuff would be in the xml and the population could be moved to a separated class like MyAdapter.java...)
Hope that helps...