Develop Reference

draw line following a finger in tablelayout in android [duplicate]

I am currently developing an android word search game. And I'm just learning Android Studio for almost a month now. I had made the ui of the game. Now my problem is the gameplay. I used a tablelayout for the textviews containing the letters for the puzzle.
Here is my createGrid() method for creating the tablelayout grid:
public void createGrid(char[][] input){
TableLayout table = (TableLayout) findViewById(R.id.mainLayout);
Typeface font = Typeface.createFromAsset(getAssets(),"kg.ttf");
for(int i = 0; i < input.length; i++){
LinearLayout rowLayout = new LinearLayout(this);
rowLayout.setOrientation(LinearLayout.HORIZONTAL);
rowLayout.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT));
TableRow row = new TableRow(this);
row.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.WRAP_CONTENT));
row.setGravity(Gravity.CENTER_HORIZONTAL);
for(int j = 0; j < input.length; j++){
TextView text = new TextView(this);
Character temp = input[i][j];
text.setText(temp.toString());
text.setPadding(20, 20, 20, 20);
text.setTextSize(25);
text.setTypeface(font);
text.setGravity(Gravity.CENTER);
row.addView(text);
}
table.addView(row);
}
}
What I want to do is make the tablelayout interactive by drawing a line when highlighting some letters.
I read this article that is all about the onDraw() and onTouchEvent() methods.
Now, I want to learn how to insert those codes on my program.
Or if that's impossible to do, any suggestions to help me improve this game?

dynamically added table is not displayed in android

there is something going wrong , such that firstly i created separately xml file for table row ,it did not work, then i created table row and text view programatically, again it is not displayed when i run , i can not get if what is wrong with my code
table = (TableLayout) findViewById(R.id.goodsTable);
for (int i = 0; i < attrName.length; i++) {
TableRow tr = new TableRow(getApplicationContext());
tr.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.WRAP_CONTENT));
TextView atName = new TextView(getApplicationContext());
atName.setText(attrName[i]);
tr.addView(atName);
table.addView(tr, new TableLayout.LayoutParams(TableLayout.LayoutParams.MATCH_PARENT, TableLayout.LayoutParams.WRAP_CONTENT));
}
table.requestLayout();

Try This it may be help to you
for (int i = 0; i < attrName.length; i++) {
TableRow tr = new TableRow(this);
tr.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.FILL_PARENT, TableRow.LayoutParams.WRAP_CONTENT));
TextView atName = new TextView(this);
atName.setText(attrName[i]);
atName.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.FILL_PARENT, TableRow.LayoutParams.WRAP_CONTENT));
tr.addView(atName);
table.addView(tr, new TableLayout.LayoutParams(TableLayout.LayoutParams.FILL_PARENT, TableLayout.LayoutParams.WRAP_CONTENT));
}
You must apply LayoutParam for TextView and for create new Object for TableRow or TextView you should use Activity Context not ApplicationContext

Creating table layout and adding rows from the code behind in Android

I need to create a table layout and add rows dynamically from Java code behind. I have already read questions here, but they are mentioning to add table rows in an already created table layout (from xml).
I need to create the table layout as well as add data to it dynamically.
Can anyone please provide some inputs?
For now, I have linear layout code in place which adds button from code behind one below the other, I need to place it under a tabular format now.

To add three buttons to TableRow use the code below
TableLayout tableLayout = new TableLayout(this);
for (int i = 0; i < 10; i++)
{
TableRow tableRow = new TableRow(this);
Button button = new Button(this);
button.setText("1");
tableRow.addView(button);
button = new Button(this);
button.setText("2");
tableRow.addView(button);
button = new Button(this);
button.setText("3");
tableRow.addView(button);
tableLayout.addView(tableRow);
}
setContentView(tableLayout);

Add the code below to your onCreate() method in you Activity class:
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
TableLayout tableLayout = new TableLayout(this);
for (int i = 0; i < 5; i++)
{
TableRow tableRow = new TableRow(this);
for (int j = 0; j < 3; j++)
{
Button button = new Button(this);
button.setText(""+j);
tableRow.addView(button);
}
tableLayout.addView(tableRow);
}
setContentView(tableLayout);
}
The code will add five rows with three buttons with the text 1 to 3 to the table.

Add the following code below your init() method:
for (int i = 0; i < GetGlobal.totalrow; i++) {
TableRow tbrow = new TableRow(this);
// tbrow.setLayoutParams(tableRowParams);
TextView t1v = new TextView(this);
t1v.setText(JSONParser.heading[i].replace('"', ' '));
t1v.setBackgroundResource(R.drawable.diamond_detail1);
t1v.setPadding(5, 3, 5, 3);
t1v.setMinHeight(50);
t1v.setTypeface(Typeface.SERIF);
t1v.setTextColor(Color.parseColor("#FFFFFF"));
t1v.setGravity(Gravity.FILL);
tbrow.addView(t1v);

Android how to create two table layouts in Activity?

Im trying to create two table layouts through activity..
I already have one table layout but how to set through activity?
I know to do it through xml but want to do it programatically..
Please Help

Check this answer and another example here
Just like in xml, you will create a TableLayout, provide params and add rows with your own UI in it.

Take one linear layout(or relative layout) in in your xml get it reference by findViewById() in onCreate() method of your activity.after that create table dynamically and add it to the linear layout.I create a method to do so . ex-
LinearLayout linear= (LinearLayout ) findViewById(R.id.linear);
//call method to add the tablelayout.
linear.addView(createtable(3,5));
private TableLayout createtable(int requiredcolumn, int requiredrow) {
TableLayout.LayoutParams tableParams = new TableLayout.LayoutParams(
TableLayout.LayoutParams.MATCH_PARENT,
TableLayout.LayoutParams.WRAP_CONTENT, 1f);
TableLayout.LayoutParams rowParams = new TableLayout.LayoutParams(
LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT, 1f);
//for border
rowParams.setMargins(2, 2, 2, 2);
TableRow.LayoutParams itemParams = new TableRow.LayoutParams(
LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT, 1f);
TableLayout tableLayout = new TableLayout(MainActivity.this);
tableLayout.setLayoutParams(tableParams);
tableLayout.setBackgroundColor(Color.WHITE);
for (int row = 0; row < requiredrow; row++) {
TableRow tableRow = new TableRow(MainActivity.this);
tableRow.setLayoutParams(rowParams);
for (int column = 0; column < requiredcolumn; column++) {
Random color = new Random();
int randomColor = Color.argb(255, color.nextInt(256),
color.nextInt(256), color.nextInt(256));
TextView textView = new TextView(MainActivity.this);
textView.setLayoutParams(itemParams);
textView.setBackgroundColor(randomColor);
tableRow.addView(textView);
}
tableLayout.addView(tableRow);
}
return tableLayout;
}

Adding a dynamic TableLayout with borders in a Android App

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);
}