I have a ScrollView and I want to insert a user specified number of HorizontalScrollViews. So what user says he wants to have a matrix of 5x5 elements, I want to insert 5 HorizontalScrollViews with 5 EditText objects each. My program adds the first line just as it's supposed to, but the rest not.
for (int i = 0; i < number; i++) {
LinearLayout ll = new LinearLayout(this);
ll.setLayoutParams(par2);
HorizontalScrollView row = new HorizontalScrollView(this);
row.setLayoutParams(par1);
row.addView(ll);
for (int j = 0; j < number; j++) {
EditText txt = new EditText(this);
txt.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
txt.setHint(i+","+j);
ll.addView(txt);
}
latout_in_scrollview.addView(row);
}
Any ideas why? Thanks!
EDIT:
The 1:1 code im using
LinearLayout dijkstra_rows;
FrameLayout.LayoutParams par1 = new FrameLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
LinearLayout.LayoutParams par2 = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_dijkstra);
dijkstra_rows = (LinearLayout) findViewById(R.id.dijkstra_rows);
Bundle extras = getIntent().getExtras();
number = extras.getInt("vertexes");
for (int i = 0; i < number; i++) {
LinearLayout ll = new LinearLayout(this);
ll.setLayoutParams(par2);
HorizontalScrollView row = new HorizontalScrollView(this);
row.setLayoutParams(par1);
row.addView(ll);
for (int j = 0; j < number; j++) {
EditText txt = new EditText(this);
txt.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
txt.setHint(i+","+j);
ll.addView(txt);
}
dijkstra_rows.addView(row);
}
}
ScrollView can contain only one childView. You can put any layout as per your requirement. I generally use Relative Layout...
Then add views dynamically to relative layout
viewLayout = (ViewGroup) mView.findViewById(R.id.YOUR_RELATIVE_LAYOUT_ID);
View lastCard = viewLayout.getChildAt(viewLayout.getChildCount() - 1);
// INFLATE YOUR NEW VIEW YOU WANT TO ADD
CardView cardView = (CardView)
LayoutInflater.from(getContext()).inflate(R.layout.card_nearest_stop, null);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
//Set id to view
int id = 125;
if (lastCard != null) {
params.addRule(RelativeLayout.BELOW, lastCard.getId());
id = lastCard.getId() + 125;
}
cardView.setLayoutParams(params);
cardView.setId(id);
viewLayout.addView(cardView);
ScrollView is a single element container.
A ScrollView is a FrameLayout, meaning you should place one child in
it containing the entire contents to scroll; this child may itself be
a layout manager with a complex hierarchy of objects. A child that is
often used is a LinearLayout in a vertical orientation, presenting a
vertical array of top-level items that the user can scroll through.
You are adding multiple LinearLayouts here
for (int i = 0; i < number; i++) {
LinearLayout ll = new LinearLayout(this);
.
.
}
You should have only one out of this loop. Then add this one to your scrollView, in Loop you can add muliple HorizontolScrollViews to this LinearLayout
Related
Which will be the better way to create a Vertical Lineal layout with four or more buttons in each row
The problems I have face are the following:
Setting the id of each button manually will result in a lot of repetitive code, more resources usage and you will have to change everyone to add a feature or change something (I think using an adapter will be the most efficient way, but...)
From what I know using a CustomAdapter don't help you set a unique ID to the buttons
Can you use an adapter to set a different id for each button dipending of the row?
Example:
second button of third row: r3b2
fifth button of first row: r1b5
Thanks.
You can create the buttons programmatically in our Activity class like this
LinearLayout layout = (LinearLayout) view.findViewById(R.id.layout); // the layout in which u want to display the buttons
layout.setOrientation(LinearLayout.VERTICAL);
int count = 1;
for (int i = 0; i < 5; i++) { // i = row count
LinearLayout row = new LinearLayout(getActivity());
row.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT));
for (int j = 0; j < 7; j++) { // j = column count (create 7 buttons in each row)
int id = count;
final Button btnTag = new Button(getActivity());
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.MATCH_PARENT);
params.weight = 1;
params.gravity = Gravity.CENTER;
btnTag.setLayoutParams(params);
btnTag.setBackgroundColor(Color.parseColor("#ffffff"));
String dateSuffix = count + getDayNumberSuffix(count);
btnTag.setTag(dateSuffix);
btnTag.setId(id);
btnTag.setText(count + "");
btnTag.setTextSize(12.0f);
btnTag.setOnClickListener(getOnClickDoSomething(btnTag, count));
row.addView(btnTag);
count++;
}
layout.addView(row);
}
View.OnClickListener getOnClickDoSomething(final Button btnTag, final int count) {
return new View.OnClickListener() {
public void onClick(View v) {
// here you can do what u want to do on button click
}
}
at the moment I have a list of buttons showing up in a ScrollView however all the buttons are on the left hand side and go down in one column.
I would like these buttons to be shown in columns of 3, so 3 buttons in one row when I add row dynamically
Here is the current code I have to display these buttons
// Find the ScrollView
ScrollView scrollView = (ScrollView)
findViewById(R.id.scrollView);
// Create a LinearLayout element
LinearLayout linearLayout = new LinearLayout(this);
linearLayout.setOrientation(LinearLayout.VERTICAL);
// Add Buttons
for (int i = 0; i < 3; i++) {
linearLayout.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
for (int j = 0; j < 20; j++) {
Button button = new Button(this);
button.setText("Some text");
linearLayout.addView(button);
}
}
// Add the LinearLayout element to the ScrollView
scrollView.addView(linearLayout);
}
I tried setting layout parameters for the buttons however it didn't change anything
Any ideas?
Thanks
Try this logic
// Find the ScrollView
ScrollView scrollView = (ScrollView)findViewById(R.id.scrollView);
// Create a LinearLayout element
LinearLayout linearLayout = new LinearLayout(this);
linearLayout.setOrientation(LinearLayout.VERTICAL);
linearLayout.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
// Add Buttons
for (int i = 0; i < 20; i++) {
LinearLayout linearLayoutChild = new LinearLayout(this);
linearLayoutChild.setOrientation(LinearLayout.HORIZONTAL);
linearLayoutChild.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
for (int j = 0; j < 3; j++) {
Button button = new Button(this);
button.setText("Some text");
linearLayoutChild.addView(button);
}
linearLayout.addView(linearLayoutChild);
}
// Add the LinearLayout element to the ScrollView
scrollView.addView(linearLayout);
Unless and until it is required I will prefer GridView or RecyclerView over Dynamic view adding
I want to create a relative layout inside a linear layout dynamically.This relative layout contains a text view and button which are also created in dynamic method.The alignment of text view and button not work properly.The code which i have tried is given below.
final LinearLayout lab_linear = (LinearLayout) findViewById(R.id.contact_list_layout);
lab_linear.setOrientation(LinearLayout.VERTICAL);
for (int i = 0; i < Size_contact; i++)
{
RelativeLayout layout = new RelativeLayout(this);
RelativeLayout.LayoutParams lp = new
RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.FILL_PARENT,RelativeLayout.LayoutParams.WRAP_CONTENT);
layout.setLayoutParams(lp);
final TextView Questions_value = new
android.widget.TextView(getApplicationContext());
Questions_value.setText(contact_name.get(i));
Questions_value.setTextSize(18);
Questions_value.setId(i);
layout.addView(Questions_value);
Button myButton = new Button(this);
myButton.setBackgroundResource(R.drawable.close);
myButton.setLayoutParams(new LayoutParams(20,20));
layout.addView(myButton);
lab_linear.addView(layout);
}
Try this..
Give layout parems for RelativeLayout individually to TextView and Button and also add addRule(RelativeLayout.ALIGN_PARENT_RIGHT); or addRule(RelativeLayout.ALIGN_PARENT_LEFT); for that views
Or add the below in for Button
lp1.addRule(RelativeLayout.RIGHT_OF, Questions_value.getId());
for (int i = 0; i < Size_contact; i++)
{
RelativeLayout layout = new RelativeLayout(this);
RelativeLayout.LayoutParams lp = new
RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.FILL_PARENT,RelativeLayout.LayoutParams.WRAP_CONTENT);
lp.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
final TextView Questions_value = new
android.widget.TextView(getApplicationContext());
Questions_value.setText(contact_name.get(i));
Questions_value.setTextSize(18);
Questions_value.setId(i);
layout.addView(Questions_value,lp);
RelativeLayout.LayoutParams lp1 = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT);
lp1.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
//Or below remove above code and uncomment the below code
//lp1.addRule(RelativeLayout.RIGHT_OF, Questions_value.getId());
Button myButton = new Button(this);
myButton.setBackgroundResource(R.drawable.close);
myButton.setLayoutParams(new LayoutParams(20,20));
layout.addView(myButton,lp1);
lab_linear.addView(layout);
}
Might I suggest using LinearLayouts instead of RelativeLayouts in your loop? That way, you won't have the overlap problem.
I am creating a Android app. This Android App will have objects that are dynamic. These objects are Places with a Address or Lat/Long, and distance from current location, and a ETA. What I would like to do is add with objects on a TableLayout with borders, but I need to be able to dynamically add rows as the number of places increase.
I understand somewhat how to do this for a fixed hardcoded number of items on the xml, but what would be the best way when the number of objects is coming from the Activity.java file?
Below is a screenshot of the TableLayout I would like:
So the object would be a place with a address, distance and direction.
but I need to be able to dynamically add rows as the number of places increase.
This isn't difficult, when you have a new object append a TableRow with the data to the TableLayout.
I understand somewhat how to do this for a fixed hardcoded number of items on the xml, but what would be the best way when the number of objects is coming from the Activity.java file?
I don't think there is a best way (or what you consider best way). You either:
Insert fake views to act as dividers. This would be easier to implement visually but it will also increase the memory consumption of your app, with bad consequences if the number of rows is big. (1)
Or use drawables for the backgrounds to simulate the borders (like nine-patch images). This would be simpler then inserting additional views but you need a bit more talent to make it look well. (2)
Some examples for your image:
(1)
private static final int DIVIDER_SIZE = 2;
// rowsCount the number of rows to add to the TableLayout
private void buildOldSchool(TableLayout table, int rowsCount) {
View divider;
for (int i = 0; i < rowsCount; i++) {
TableRow row = new TableRow(this);
for (int j = 0; j < 7; j++) {
if (j % 2 == 0) {
divider = new View(this);
divider.setLayoutParams(new TableLayout.LayoutParams(
DIVIDER_SIZE, TableLayout.LayoutParams.MATCH_PARENT));
divider.setBackgroundColor(Color.GREEN);
row.addView(divider, new TableRow.LayoutParams(
DIVIDER_SIZE, TableRow.LayoutParams.MATCH_PARENT));
continue;
}
TextView tv = new TextView(this);
tv.setText("DX"); // dummy data
row.addView(tv, new TableRow.LayoutParams(
TableRow.LayoutParams.MATCH_PARENT,
TableRow.LayoutParams.WRAP_CONTENT));
}
divider = new View(this);
divider.setLayoutParams(new TableLayout.LayoutParams(
TableLayout.LayoutParams.MATCH_PARENT, DIVIDER_SIZE));
divider.setBackgroundColor(Color.GREEN);
if (i == 0) {
table.addView(divider);
divider = new View(this);
divider.setLayoutParams(new TableLayout.LayoutParams(
TableLayout.LayoutParams.MATCH_PARENT, DIVIDER_SIZE));
divider.setBackgroundColor(Color.GREEN);
}
table.addView(row);
table.addView(divider);
}
}
(2) or with images:
private void buildWithDrawables(TableLayout table, int rowsCount) {
for (int i = 0; i < rowsCount; i++) {
TableRow row = new TableRow(this);
row.setBackgroundResource(i == 0 ? R.drawable.firstrow
: R.drawable.normalrow);
for (int j = 0; j < 3; j++) {
TextView tv = new TextView(this);
tv.setBackgroundResource(j == 2 ? R.drawable.extra
: R.drawable.cell);
tv.setText("DX");
row.addView(tv, new TableRow.LayoutParams(
TableRow.LayoutParams.MATCH_PARENT,
TableRow.LayoutParams.WRAP_CONTENT));
}
table.addView(row);
}
}
Where the images are:
R.drawable.cell:
R.drawable.extra (a visually transparent drawable which replicates the nine-patch above):
R.drawable.normalrow:
R.drawable.firstrow:
Ignore my design skills.
If your foresee a large number of rows I would advise you to use a ListView, which you could pretty easy make it to look like a table with borders.
Couldn't figure out the vertical line, but something you can build upon
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ScrollView sv = new ScrollView(this);
TableLayout ll=new TableLayout(this);
HorizontalScrollView hsv = new HorizontalScrollView(this);
for(int i=1;i<5;i++) {
TableRow tbrow=new TableRow(this);
for(int j=1;j<=3;j++) {
TextView tv1=new TextView(this);
tv1.setText("Element :"+ i + "" + j);
tbrow.addView(tv1);
}
ll.addView(tbrow);
View v = new View(this);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, 5);
v.setLayoutParams(params);
v.setBackgroundColor(getResources().getColor(android.R.color.white));
ll.addView(v);
}
hsv.addView(ll);
sv.addView(hsv);
setContentView(sv);
}
I'm trying to add LinearLayouts dynamically but it's just not working. I think I just need another set of eyes to look it over. Can anyone help me?
LinearLayout parentLayout = (LinearLayout)findViewById(R.id.parentLayout);
lLayout = new LinearLayout[8];
for(int i = 0; i < lLayout.length; i++) {
lLayout[i] = new LinearLayout(this);
lLayout[i].setId(i);
lLayout[i].setOrientation(LinearLayout.HORIZONTAL);
if(i%2 == 0) {
lLayout[i].setBackgroundColor(Color.GREEN);
} else {
lLayout[i].setBackgroundColor(Color.MAGENTA);
}
parentLayout.addView(lLayout[i]);
}
You need to set LayoutParams, try adding this:
lLayout[i].setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.WRAP_CONTENT));
It looks like you are trying to make a listview yourself using linearlayouts rather than actually using the ListView already supported.
If you are actually trying to do that, you should first give the layouts inside the view a width and height. I'd also put the list in a scrollview in case it overflows the outer layout.
Maybe try this
LinearLayout parentLayout = (LinearLayout)findViewById(R.id.parentLayout);
lLayout = new LinearLayout[8];
for(int i = 0; i < lLayout.length; i++) {
lLayout[i] = new LinearLayout(this);
lLayout[i].setId(i);
lLayout[i].setOrientation(LinearLayout.HORIZONTAL);
if(i%2 == 0) {
lLayout[i].setBackgroundColor(Color.GREEN);
} else {
lLayout[i].setBackgroundColor(Color.MAGENTA);
}
LinearLayout.LayoutParams myLayoutParams = new LinearLayout.LayoutParams(
LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);
myLayoutParams.leftMargin = 0;
myLayoutParams.topMargin = 50 * i;
myLayoutParams.width = myScreenSize; //e.g. 480
myLayoutParams.height = 50;
lLayout[i].setLayoutParams(myLayoutParams);
parentLayout.addView(lLayout[i]);
}