The code below creates a varying amount of textViews at run-time depending on the number of keys in friendMap:
generatedViews = new TextView[numberOfFriends];
int count = 0;
for (String k : friendMap.keySet()) {
TextView textView = new TextView(this);
textView.setVisibility(View.VISIBLE);
textView.setText(k);
textView.setTextSize(TypedValue.COMPLEX_UNIT_SP, 20f);
textView.setGravity(Gravity.CENTER);
String mutual = friendMap.get(k);
if (mutual.equals("no")) {
textView.setBackgroundColor(Color.RED);
} else {
textView.setBackgroundColor(Color.GREEN);
}
linLayout.addView(textView);
generatedViews[count] = textView;
count++;
}
My question is: how can I set constraints to the created textViews so they don't bunch?
It's simple:
Set the layout parameters of the LinearLayout with:
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
layoutParams.setMargins(100, 20, 100, 20);
linLayout.addView(textView, layoutParams);
As #TheWandered said you should probably use RecyclerView.
But if for some reason it's not an option, here is how you can do it:
First thing, you are going to have to generate ID for each TextView, so you can target the constraints and then:
ConstraintSet constraintSet = new ConstraintSet();
constraintSet.clone(constraintLayout);
constraintSet.connect(text_view_id,ConstraintSet.TOP, previous_text_view_id,ConstraintSet.BOTTOM,0);
// is equal to "layout_constraintTop_toBottomOf="previous_text_view_id"
constraintSet.applyTo(constraintLayout);
Related
I am trying to create a textview and a button programmatically in the existing relative layout. The idea is to put the textview in the left corner of the parentView(relativeLayout) and add then the button to the right of the textView. But in the app it looks like they are on the one place. The button is in front of textView, not on the right. Please, give me some advice.
the code:
TextView textView = new TextView(getActivity().getApplicationContext());
textView.setText("...");
textView.setTextColor(Color.GRAY);
int id = 0;
textView.setId(id);
final RelativeLayout.LayoutParams params =
new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT);
params.addRule(RelativeLayout.ALIGN_PARENT_TOP);
params.setMargins(16, 16, 0, 0);
textView.setLayoutParams(params);
notificationContentLayout.addView(textView, params);
Button customerButton = new Button(getActivity().getApplicationContext());
customerButton.setText("...");
customerButton.setTextColor(Color.parseColor("#00b3ff"));
customerButton.setBackgroundColor(Color.TRANSPARENT);
id = id + 1;
customerButton.setId(id);
final RelativeLayout.LayoutParams paramsForButton =
new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT);
paramsForButton.addRule(RelativeLayout.RIGHT_OF, textView.getId());
paramsForButton.addRule(RelativeLayout.ALIGN_PARENT_TOP); // with or without that rule everything is the same
// paramsForButton.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
paramsForButton.setMargins(10,0, 16, 0);
customerButton.setLayoutParams(paramsForButton);
notificationContentLayout.addView(customerButton, paramsForButton);
For RelativeLayout.LayoutParams rules, 0 means false, and only applies to rules that don't refer to sibling Views, such as CENTER_IN_PARENT. Since you've set your TextView's ID to 0, the RIGHT_OF rule you're adding is being ignored, as false doesn't make sense with that.
To remedy this, simply set the TextView's ID to any positive int value; e.g., 1.
this is my code, but dont know why its returning null? however i can put a null check here, but is there anything wrong?
TextView descriptiontv = (TextView) findViewById(R.id.descriptiontv);
TextView tc = new TextView(c);
final PopupWindow windowPopUp = new PopupWindow(tc,LayoutParams.MATCH_PARENT,LayoutParams.WRAP_CONTENT ,false);
tc.setBackgroundResource(R.drawable.bg_training_baloon_hc_2x);
tc.setText("this is a demo test to check how it looks, i m just wanting to test whether it works or not");
tc.setPadding(20, 20, 20, 20);
LinearLayout.LayoutParams params = new android.widget.LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
params.setMargins(30, 0, 30, 0);
tc.setLayoutParams(params);
Based on my experience, you have to add the view to its parent view first before you can set the layout parameters for it, like so:
TextView calendarYear = new TextView(getActivity());
calendarYear.setText(calendar.getYear() + "");
calendarYear.setTextSize(20);
calendarYear.setTypeface(null, Typeface.BOLD);
calendarYear.setGravity(Gravity.CENTER);
calendarYear.setTextColor(resources.getColor(android.R.color.black));
calendarItemsLinearLayout.addView(calendarYear);
// We have to add the TextView to the layout first before we
// can set the layout margins for it
ViewGroup.LayoutParams layoutParams = calendarYear.getLayoutParams();
((LinearLayout.LayoutParams)layoutParams).setMargins(0, (int)(16 * density), 0, 0);
calendarYear.setLayoutParams(layoutParams);
Here
tc.getLayoutParams()
you haven't given it any params yet so it will return null. Maybe you meant
descriptiontv.getLayoutParams()
Edit
Try changing
params.leftMargin = 30;
params.rightMargin = 30;
to
params.setMargins(30, 0, 30, 0);
And change
LinearLayout.LayoutParams params = (android.widget.LinearLayout.LayoutParams)tc.getLayoutParams();
to
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
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...
I'm trying to position items inside my RelativeLayout so that the image appears first, the title to the right of it, and the content below the image area. Those three content items appear on top of each other. I understand that my LayoutParams probably aren't being set, but I'm not sure why or how to fix it. Any help? Thanks.
RelativeLayout rl = (RelativeLayout)findViewById(R.id.contentTable);
for(int i=0;i<itemIndexes.size();i++)
{
RelativeLayout item = new RelativeLayout(this);
item.setId(i);
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(320, RelativeLayout.LayoutParams.WRAP_CONTENT);
if(i>0)
{
lp.addRule(RelativeLayout.RIGHT_OF,i-1);
}
item.setLayoutParams(lp);
ImageView iv = new ImageView(this);
if(globals.myHitetItems.get(itemIndexes.get(i)).image!=-1)
{
iv.setImageResource(globals.myHitetItems.get(itemIndexes.get(i)).image);
item.addView(iv);
}
else
{
iv.setImageResource(R.drawable.noimage);
item.addView(iv);
}
RelativeLayout.LayoutParams text1lp =new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.FILL_PARENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
text1lp.addRule(RelativeLayout.RIGHT_OF,iv.getId());
TextView tv = new TextView(this);
tv.setText(globals.myHitetItems.get(itemIndexes.get(i)).name);
tv.setTextSize(20);
tv.setPadding(3, 3, 3, 3);
tv.setLayoutParams(text1lp);
item.addView(tv);
RelativeLayout.LayoutParams text2lp=new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.FILL_PARENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
text2lp.addRule(RelativeLayout.BELOW,iv.getId());
tv = new TextView(this);
tv.setText(globals.myHitetItems.get(itemIndexes.get(i)).content);
tv.setTextSize(20);
tv.setPadding(3, 3, 3, 3);
tv.setLayoutParams(lp);
item.addView(tv);
rl.addView(item);
}
That looks painful to debug. It sounds like maybe the relative rules aren't being set or accepted. I suggest simplifying to a static test set to verify that one row of views can be set relative to each other (and ensure that one of them is anchored to the layout itself).
I have created a dynamic TableLayout and I have given an image to TableRow's Background.But my problem is the image is taking its actual size not what I am setting.I want that image should take the height and width defined by me.
Please Help Me.
My Code is...
void createRows()
{
for(int i=0;i<5;i++)
{
String name = "Hareesh Kumar Gangadhara";
String time = "2:53 PM";
String date = "06/05/11";
String time_date =time+" "+date;
String message = "Hello Prashant";
TableRow row_message = new TableRow(this);
ImageView friend_img = new ImageView(this);
LinearLayout layout_msg_info = new LinearLayout(this);
LinearLayout layout_name_date = new LinearLayout(this);
LinearLayout layout_message = new LinearLayout(this);
friend_img.setLayoutParams(new LayoutParams(35,35));
friend_img.setBackgroundResource(R.drawable.archit);
TextView tv_name = new TextView(this);
TextView tv_time_date = new TextView(this);
TextView tv_message = new TextView(this);
tv_name.setText(name);
tv_time_date.setText(time_date);
tv_message.setText(message);
tv_name.setTextColor(color_black);
tv_time_date.setTextColor(color_black);
tv_message.setTextColor(color_black);
tv_name.setTextSize(14);
tv_time_date.setTextSize(10);
tv_message.setTextSize(12);
layout_name_date.addView(tv_name);
layout_name_date.addView(tv_time_date);
layout_message.addView(tv_message);
layout_msg_info.setOrientation(LinearLayout.VERTICAL);
layout_msg_info.setPadding(30, 10, 0, 0);
layout_msg_info.addView(layout_name_date);
layout_msg_info.addView(layout_message);
row_message.setBackgroundResource(R.drawable.img_message_back);
row_message.setLayoutParams(new TableRow.LayoutParams(LayoutParams.FILL_PARENT,40));
row_message.setPadding(0, 0, 10, 5);
row_message.addView(friend_img);
row_message.addView(layout_msg_info);
table_message.addView(row_message);
}
}
Use TableRow.LayoutParams instead of ViewGroup.LayoutParams.
Hope it Helps
You probably need to set the ScaleType value on your ImageView.
Here's the ScaleType reference: http://developer.android.com/reference/android/widget/ImageView.ScaleType.html
You're probably looking to set it to FIT_XY or CENTER_INSIDE.