How should I implement a table of 15 by 15 cells if I plan to dynamically update the cells individually?
I began creating the table in my main.xml, but I don't want to describe the table with 15 TableRow elements and 15 elements in each of those all in one body of code. I feel like even putting just the table itself in a separate file is too bulky. It is possible to create a file of a row and and a file of a table including the row 15 times and dynamically assign different IDs to each cell?
You could do comething like:
public void generateTable() {
TableLayout tv = new TableLayout(context);
for (int y = 0; y < 15; y++) {
TableRow tr = new TableRow(context);
for (int x = 0; x < 15; x++) {
TextView tv = new TextView(context);
tr.addView(tv);
tv.setText("ID: " + (y*15 + x));
tv.setId(y*15 + x);
// And to allow for easy reading
if (y*15+x % 2 == 0)
tv.setBackgroundColor(0xffff0000);
else
tv.setBackgroundColor(0xff0000ff);
}
}
}
Create a table layout like this from xml
TableLayout tl = (TableLayout) findViewById(R.id.content_table);
You can create a table row in xml as tablerow.xml.This will help you to define table row layout in an easier way.I am adding only 1 TextView.
<TableRow xmlns:android="http://schemas.android.com/apk/res/android">
<TextView android:id="#+id/content"
android:singleLine="false"
/>
LayoutInflater inflater = getLayoutInflater();
for (int rowID = 0; rowID < 15; rowID++) {
TableRow row = (TableRow)inflater.inflate(R.id.tablerow, tl, false);
TextView content = (TextView)row.findViewById(R.id.content);
content.setId(rowID);
content.setText("this is the content");
tl.addView(row);
}
Related
So I'm trying to create a GridView style layout in Android without actually using a custom Gridview adapter, since I don't want it to scroll. I've tried just turning scrolling off, but it ruins my layout since I'm adding other elements around it in a vertical LinearLayout.
My next experiment was to use a TableLayout and then just add inflated layouts as table cells, but I'm also having an issue with this. Here is a test that I am running for a brief proof of concept:
TableRow trackingActivityRow = new TableRow(getActivity());
for(int j = 0; j < trackingActivities.size(); j ++) {
TrackingActivity trackingActivity = trackingActivities.get(j);
View trackingActivityCell = getActivity().getLayoutInflater()
.inflate(R.layout.table_cell_tracking_activity, trackingActivityRow, true);
TextView txtDescription = (TextView)trackingActivityCell.findViewById(R.id.txtDescription);
txtDescription.setText(trackingActivity.getDescription());
}
tableLayout.addView(trackingActivityRow);
It seems to create the number of cells correctly, but it doesn't want to set the text like it should be. Furthermore, I'm having an issue of logic when it comes to creating a new row for every 4 TrackingActivities.
If anyone has any input it would be appreciated.
/Update/
Here is a graphic of the issue. The cell with "Walk" in it is displaying correctly, but the other cells only display the placeholder text inside the textview which should have been replaced.
I created a customized GridView based on a tablelayout with a listadapter.
Simplified version of the setAdapterMethod in the extended TableLayout:
int itemPos = -1;
int numRows = (int) Math.ceil((double) adapter.getCount() / (double) mNumColumns);
for (int yPos = 0; yPos < numRows; yPos++) {
//Create new row
TableRow tableRow = new TableRow(this.getContext());
for (int xPos = 0; xPos < mNumColumns; xPos++) {
itemPos++;
View itemView = adapter.getView(itemPos, null, tableRow);
tableRow.addView(itemView);
}
this.addView(tableRow, new TableLayout.LayoutParams(TableLayout.LayoutParams.MATCH_PARENT, TableLayout.LayoutParams.MATCH_PARENT));
}
I'm trying to learn how to write Android programs, and I'm having trouble figuring out how padding works, in particular in a FrameLayout within a TableLayout.
private void fillTable(int nrows, int ncols) {
final int CENTER = 0x11; // used for "gravity" parameters
TableLayout table = (TableLayout) this.findViewById(R.id.tablelayout);
int counter = 1;
TextView text;
for (int i = 0; i < nrows; i++) {
TableRow row = new TableRow(this);
table.addView(row);
for (int j = 0; j < ncols; j++) {
View cell;
text = new TextView(this);
text.setTextColor(Color.BLUE);
text.setText(Integer.toString(counter++));
text.setGravity(CENTER);
if (i == 2 && j == 2) {
FrameLayout frame = new FrameLayout(this);
text.setLayoutParams(new FrameLayout.LayoutParams(90, 45, CENTER));
frame.setPadding(0, 0, 0, 0);
frame.addView(text);
cell = frame;
} else {
cell = text;
}
cell.setBackgroundColor((i + j) % 2 == 0 ? Color.YELLOW : Color.WHITE);
row.addView(cell);
cell.setLayoutParams(new TableRow.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT, 1F/ncols));
}
row.setLayoutParams(new TableLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT, 1F/nrows));
}
}
tablelayout just looks like this:
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/tablelayout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</TableLayout>
I'm calling this with nrows=12 and ncols=5. I'm running on an emulator whose width is 720 pixels. If I change if (i==2&&j==2) to if (false), so that only an array of TextView is displayed, the columns are even, as I expect. However, with the code as written, the middle column is wider than the others.
I've also tried this adding android:stretchColumns="*" to the tablelayout definition and removing the weight parameter from cell.setLayoutParams, and the results are the same.
Assuming I have a reason to want to specify pixels for text.setLayoutParams (because of what I plan to do later), how would I get the column widths to be the same? Since 90*5 is well under 720, I don't understand why, or where, the extra width is being added.
Whenever you are dealing with weights, you must let the option take care of the remaining space. In this case width. Just set the width of each element to 0:
cell.setLayoutParams(new TableRow.LayoutParams(0, LayoutParams.MATCH_PARENT, 1F/ncols));
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 create a TableLayout in code. Each row in the table should have equally spaced columns. The content of each cell is the same and is just a square button (I'm trying to create a calendar).
How do I get each column to take up equal width and then take up the full width the table? Right now the columns are all the same width because they all have the same content, but columns are not expanding to fill the entire width of the table.
The following is what I have tried. I am extending the TableLayout class which is why I use "this" in the code. The lines commented out are things I tried that had no effect:
this.setStretchAllColumns(true);
TableRow row;
CalendarButton button;
for(int i = 0; i < 6; ++i)
{
row = createRow();
TableRow.LayoutParams params = new TableRow.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
//params.span = 7;
row.setLayoutParams(params);
//row.setWeightSum(7);
for(int j = 0; j < 7; ++j)
{
button = createCalendarButton();
TableRow.LayoutParams params = new TableRow.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
params.span = 1;
row.addView(button, params);
}
this.addView(row);
}
I'm developping an android application. For that I need to have a dynamic tableView. I'm using TableLayout for that which is available in android. But I couldn't find a way to have multiple columns in my tableView. Any option please?
I don't know if I fully understand your question, but here:
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
TableLayout tableLayout = new TableLayout(getApplicationContext());
TableRow tableRow;
TextView textView;
for (int i = 0; i < 4; i++) {
tableRow = new TableRow(getApplicationContext());
for (int j = 0; j < 3; j++) {
textView = new TextView(getApplicationContext());
textView.setText("test");
textView.setPadding(20, 20, 20, 20);
tableRow.addView(textView);
}
tableLayout.addView(tableRow);
}
setContentView(tableLayout);
}
This code creates TableLayout with 3 columns and 4 rows. Basically you can have TableLayout declared in XML file, then setContentView to XML, and use findViewById to find your TableLayout. Only TableRow and it's children have to be done in java code.
You can add as many column as you want on design view. All you have to do is to put any View element you want to show as a column bettwen TablaRow tags.
<TableLayout>
<TableRow>
<TextView></TextView> // That's a column
<ImageView></ImageView> // That's other column
....
<Other views></Other views> // That's the last column
</TableRow>
</TableLayout>