I have 3 VerticalViewPagers next to each other. Each view pager contains only images. Here's example:
when user clicks on the image, I need to make an EditText. The EditText has to be on an exact spot for each image. So I need to get the position of the image, add some constant and make there a EditText. How to do this?
Note: I tried getLocationOnScreen, for the leftmost image, i got [0,50] back and when I set margin top = 50 and left = 0 for the EditText, it was above the image.
Inflating the items:
public Object instantiateItem(ViewGroup collection, final int position) {
LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
final View rootView = layoutInflater.inflate(R.layout.item_layout, null);
final ImageView imageView = (ImageView) rootView.findViewById(R.id.item);
final RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
collection.addView(rootView, 0);
rootView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
int[] pos = new int[2];
imageView.getLocationOnScreen(pos);
params.leftMargin = coordinates.get(0).first;
params.topMargin = coordinates.get(0).second;
EditText editText = new EditText(context);
editText.setLayoutParams(params);
((RelativeLayout) rootView).addView(editText);
}
}
});
return rootView;
item_layout.xml:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/item_relative_layout"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/item"
android:contentDescription="#string/imageContent" />
</RelativeLayout>
You must also take taskbar height into calculation, since the getLocationOnScreen is the location when the layout is below the taskbar. When positioning an object on a screen, the top left corner of the application´s layout is [0,0], but it is not the [0,0] point of the whole screen, because the application layout starts below the taskbar. The point [0,0] in the getLocationOnScreen lays in the top left corner of the whole screen so you will get the coordinates slightly moved by the taskbar height.
So when positioning your EditText, just add the taskbar height to the y-coordinate and you should be good.
Related
I want to display a popup window in my code such that, no matter where I touch on the screen, the popup should show up right above the place I touch. Not sure, how to achieve this. This is my current popup window code:
LayoutInflater inflater = (LayoutInflater) getApplicationContext().getSystemService(LAYOUT_INFLATER_SERVICE);
View customView = inflater.inflate(R.layout.popup,null);
final PopupWindow popupWindow = new PopupWindow(
customView,
LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT);
// Set an elevation value for popup window
// Call requires API level 21
if(Build.VERSION.SDK_INT>=21){
popupWindow.setElevation(5.0f);
}
final TextView placename = (TextView) customView.findViewById(R.id.popup_id) ;
Button closeButton = (Button) customView.findViewById(R.id.directions);
placename.setText(place.getName());
popupWindow.setBackgroundDrawable(new BitmapDrawable());
popupWindow.setOutsideTouchable(true);
// Set a click listener for the popup window close button
closeButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
// Dismiss the popup window
popupWindow.dismiss();
}
});
popupWindow.setFocusable(true);
popupWindow.showAtLocation(mapInsideContainer, Gravity.CENTER, 0, 0);
popupWindow.showAsDropDown(customView);
This is my popup.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:background="#android:color/background_light">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_margin="1dp"
android:background="#android:color/white">
>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_margin="20dp">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textColor="#000000"
android:id="#+id/popup_id" />
<Button
android:id="#+id/directions"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#color/black_overlay"
android:textColor="#android:color/white"
android:text="Directions" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
Currently it shows on the center of the screen due to Gravity.CENTER, but I would like to show it right above the place I touch dynamically on screen. Any ideas? Thanks
Bonus points if you could guide me through creating a chat bubble like popup with title on top and a "places" button at the bottom with the bubble pointer at the position clicked on screen
this is what i did, Hope help you
customView.measure(View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED), View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
popupWindow.showAtLocation(getWindow().getDecorView(), Gravity.NO_GRAVITY, (int)event.getX(), (int)event.getY() - customView.getMeasuredHeight());
And Override public boolean onTouchEvent(MotionEvent event)
#Override
public boolean onTouchEvent(MotionEvent event) {
popup(event);
return super.onTouchEvent(event);
}
EDIT:
My Writing as Follow, And it's work for me.
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
#Override
public boolean onTouchEvent(MotionEvent event) {
popup(event);
return super.onTouchEvent(event);
}
private void popup(MotionEvent event) {
LayoutInflater inflater = (LayoutInflater) getApplicationContext().getSystemService(LAYOUT_INFLATER_SERVICE);
View customView = inflater.inflate(R.layout.popup,null);
final PopupWindow popupWindow = new PopupWindow(
customView,
WindowManager.LayoutParams.WRAP_CONTENT,
WindowManager.LayoutParams.WRAP_CONTENT);
// Set an elevation value for popup window
// Call requires API level 21
if(Build.VERSION.SDK_INT>=21){
popupWindow.setElevation(5.0f);
}
final TextView placename = (TextView) customView.findViewById(R.id.popup_id) ;
Button closeButton = (Button) customView.findViewById(R.id.directions);
placename.setText("Name");
popupWindow.setBackgroundDrawable(new BitmapDrawable());
popupWindow.setOutsideTouchable(true);
// Set a click listener for the popup window close button
closeButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
// Dismiss the popup window
popupWindow.dismiss();
}
});
// popupWindow.setFocusable(true);
popupWindow.setOutsideTouchable(true);
customView.measure(View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED), View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
popupWindow.showAtLocation(getWindow().getDecorView(), Gravity.NO_GRAVITY, (int)event.getX(), (int)event.getY() - customView.getMeasuredHeight());
getWindow().getDecorView().setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
return false;
}
});
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/parent"
android:background="#color/colorAccent"
android:fitsSystemWindows="true">
</android.support.constraint.ConstraintLayout>
Instead of using PopupWindow, try creating a transparent Activity, similar to this.
Then, you can create custom drawables for the chat bubbles (since the bubble pointer will need to be in different places depending on where the user clicked). Override onTouchEvent() and get the coordinates of the users touch, then launch the transparent activity and pass it the coordinates in the intent, so that you can place the bubble view in the appropriate spot.
This adds extra overhead because you are launching a new Activity, but it gives you full power to customize the appearance and behavior however you want.
Here's some details. This is what I've done when I want customized popup menus.
For the transparent activity, create a new activity and assign a theme to it in the manifest:
<activity
android:name=".PopupActivity"
android:theme="#style/Transparent" />
And in styles.xml:
<style name="Transparent" parent="Theme.AppCompat.NoActionBar">
<item name="android:windowIsTranslucent">true</item>
<item name="android:windowBackground">#color/translucent</item>
</style>
You can define #color/translucent to be completely transparent, I add some grey to it to make the view underneath appear to dim when the popup appears.
In the layout for the activity:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/activity_popup"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/colorPrimary"
android:layout_margin="60dp">
Here I'm using RelativeLayout, but you can use whatever layout you want, the important thing is the margins. Now the activity looks like this, where the background activity is visible behind this one:
Next you'll use the touch coordinates to dynamically alter the margins to make the rectangle appear wherever you want.
We'll need to know the screen size and density and the height of the status bar at the top of the screen, so in the onCreate() method of your main activity, add:
//Determine the screen dimensions and density
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
screenWidth = metrics.widthPixels;
screenHeight = metrics.heightPixels;
screenDensity = metrics.density;
int resourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
int statusBarHeight = (int) (24 * density);
if (resourceId > 0) {
statusBarHeight = getResources().getDimensionPixelSize(resourceId);
}
These values won't change, so store them in static variables so other classes can get them when needed.
Now, in the onCreate() method of the transparent activity, compute the margins based on the touch event coordinates:
int popupSize = 100;
int rMargin, lMargin, tMargin, bMargin;
lMargin = xCoord - popupSize;
rMargin = screenWidth - xCoord - popupSize;
tMargin = yCoord - popupSize;
bMargin = screenHeight - yCoord - popupSize - statusBarHeight;
RelativeLayout layout = (RelativeLayout) findViewById(R.id.activity_popup);
FrameLayout.LayoutParams params = (FrameLayout.LayoutParams) layout.getLayoutParams();
params.setMargins(lMargin, tMargin, rMargin, bMargin);
layout.setLayoutParams(params);
This creates a square that is centered on the touch coordinates. For instance, given x = 700 and y = 1500, I get:
And for x = 150 and y = 200, I get:
You can see that in this case, if the coordinates are too close to the edge, you'll get a negative margin and the square will be cropped. It will take more math to correct this.
What I would do is divide the screen area into four quadrants and calculate which quadrant the touch event was in. Then, for instance if the touch was in the top-left quadrant, align the square's top-left corner with the touch coordinates. That way the square will never be cropped by the screen edge.
As far as creating a bubble with a pointer, make 4 custom drawables of the bubble, each one with the pointer at a different corner. Then, depending on the quadrant of the touch event, load the appropriate drawable so the pointer is always in the right direction.
This post is getting a little too long for that though.
I am looking for a solution to have larger bounds for selector of an Android view.
Imagine that View is a rectangle view. When user click on the view touch feedback that will be shown is a circle pretty larger than view bounds.
Do you know a good approach to build such an idea?
There is no way how to do that in view's bounds.(I think ). You can implement it by making visual action on parent background view.
ImageButton im = (ImageButton) findViewById(R.id.ur_btn);
im.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
float x = im.getX();
float y = im.getY();
}
});
}
private void addCircleBehindRectangle(int x, int y){
RelativeLayout parent = (RelativeLayout) findViewById(R.id.my_relative_layout);
ImageView iv = new ImageView(this);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(x, y);
//optional margin l/r
params.leftMargin = 50;
params.topMargin = 60;
parent.addView(iv, params);
}
I hope it helps a little bit. Good luck
If you want to show a view outside of its clipping area, you need to enable this in its parent container (any layout which derives from ViewGroup):
ViewGroup.clipChildren
Another way is increase/decrease paddings of the clicked view itself.
So, I have a Layout that contains a Button and an ImageView. When you press the button the ImageView should slide out from the button like I just pulled down a rolldown curtain (bushing other views below it down). Basically what the image below show. When you press the button again the ImageView should, unlike the gif, smoothly animates up again.
.
Using this SO question I've managed to animate the height from 0 to full size but in the wrong direction. I set the scaleType to "Matrix" and the default behaviour when setting the height is to show the part from the top down to [height].
For the animation I'll need the opposite. So if I would set the height to 50dp it would show the bottom 50dp. Then I can move the ImageView down at the same time it's being revealed, thus giving the rolldown curtain effect.
I've looked throught all the different layout and view options and found nothing that seems to do this. So I'm guessing I need to specify the transformation matrix. I looked through the android.graphics.Matrix class but it's a little but too complicated for me. I simply have no idea how to use it.
If there is another, easier, way to do this then that would be fantastic but if not then I really need help with the matrix.
I'm also including the code here:
The Rolldown View XML
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/sliding_accordion"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:src="#drawable/acc_image"
android:contentDescription="#string/accord"
android:scaleType="matrix"
android:layout_below="#+id/acc_button"
android:layout_marginTop="-10dp"
android:layout_centerHorizontal="true"/>
<Button
android:id="#+id/acc_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>
The implementation in code.
(Note, the MyCustomAnimation class is a copy-paste version of the class found here)
//Called from all constructors
private void create()
{
final Context context = getContext();
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
RelativeLayout layout = (RelativeLayout) inflater.inflate(R.layout.widget_accordion, this, false);
final Button theButton = (Button) layout.findViewById(R.id.topic_button);
final ImageView accordionView = (ImageView) layout.findViewById(R.id.sliding_accordion);
accordionView.setVisibility(INVISIBLE);
theButton.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v)
{
if (accordionView.getVisibility() == View.VISIBLE)
{
MyCustomAnimation a = new MyCustomAnimation(accordionView, 1000, MyCustomAnimation.COLLAPSE);
height = a.getHeight();
accordionView.startAnimation(a);
}
else
{
MyCustomAnimation a = new MyCustomAnimation(accordionView, 1000, MyCustomAnimation.EXPAND);
a.setHeight(height);
accordionView.startAnimation(a);
}
}
});
this.addView(layout);
}
This took a long time perfect. But I managed to do it after a lot of experimenting.
I animate the margins of the drawer but because of the unexpected behavior of negative margins the button that opens the drawer can not be positioned on top.
When the drawer is closed the XML looks like so:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/accordion"
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<com.animationtest.drawer.Drawer
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/topic_drawer"
android:layout_centerHorizontal="true"
android:layout_marginTop="0dp"
android:visibility="invisible"/>
<com.animationtest.drawer.Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/topic_btn"
android:layout_marginTop="58dp"/>
</RelativeLayout>
Then when the button is pressed the top_margin of the drawer is increased until it has come to whatever position is needed (in this case drawerHeight - someOffset).
I used android.view.animation.Animation to animate the widget my applyTransformation function looks something like this (Note that mLayoutParams are the drawer params):
#Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
int valueDifference = Math.abs(startValue - endValue);
float valueChange = interpolatedTime * valueDifference;
if(currentState.equals(State.COLLAPSED)) {
// is closed and I want to open it
mLayoutParams.topMargin = Math.round(interpolatedTime * valueDifference);
}
else {
// is opened and I want to close it
mLayoutParams.topMargin = valueDifference - Math.round(interpolatedTime * valueDifference);
}
drawerView.requestLayout(); //this is my drawer
}
Finally, to hide the top of the drawer as it moves, I overrode my DrawerView's dispatchDraw method to looks like so:
#Override
protected void dispatchDraw(Canvas canvas) {
float height = getHeight();
float top = height - ((LayoutParams) getLayoutParams()).topMargin;
Path path = new Path();
RectF rectF = new RectF(0.0f, top, getWidth(), height);
path.addRoundRect(rectF, 0.0f, 0.0f, Path.Direction.CW);
canvas.clipPath(path);
super.dispatchDraw(canvas);
}
One final note:
Because of the Button's position one would need to set the widgets margin as a negative number for it to align correctly in a list or layout. In this case it would have to be -58dp.
i have two image views which translates on click.
the animation works properly for one view but for second image view , my animation is not according to coordinates provided.
when i click top image view (img1) it animates properly toward bottom image view (img2) . But when i click the bottom image view, it animates from somewhere down and move towards image view 2 initial position only. though the expected behaviour is, it should animate from its position to top image view (img1) initial position.
My xml is
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<ImageView
android:layout_width="100dp"
android:layout_height="100dp"
android:src="#drawable/letter_f"
android:layout_alignParentTop="true"
android:id="#+id/imgview1"
android:background="#drawable/chart"/>
<ImageView android:layout_height="100dp"
android:layout_width="100dp"
android:id="#+id/imgview2"
android:src="#drawable/letter_g"
android:background="#drawable/chart"
android:layout_alignParentRight="true"
android:layout_alignParentBottom="true"/>
</RelativeLayout>
and my java class file is
public class AnimationDemo extends Activity implements OnClickListener
{
private ImageView img1;
private ImageView img2;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
img1 = (ImageView)findViewById(R.id.imgview1);
img2 = (ImageView)findViewById(R.id.imgview2);
img1.setOnClickListener(this);
img2.setOnClickListener(this);
}
#Override
public void onClick(View arg0)
{
int x1,y1; // Coordinates of first image view
int x2,y2; //Coordinates of second image view
ImageView img = (ImageView)arg0;
x1 = img1.getLeft();
y1 = img1.getTop();
x2 = img2.getLeft();
y2 = img2.getTop();
TranslateAnimation slide;
if(arg0 == img1)
{
//translate from img view 1 to img view 2
slide = new TranslateAnimation(Animation.ABSOLUTE,x1,Animation.ABSOLUTE, x2,Animation.ABSOLUTE, y1,Animation.ABSOLUTE,y2 );
}
else
{
// translate from img view 2 to img view 1
slide = new TranslateAnimation(Animation.ABSOLUTE,x2,Animation.ABSOLUTE, x1,Animation.ABSOLUTE, y2,Animation.ABSOLUTE,y1);
}
slide.setDuration(1000);
slide.setFillAfter(true);
img.startAnimation(slide);
}
}
Your troubles are due to your locations. I believe when animations are moved with absolute pixels it is relative to itself. So on your second animation you were in essence moving it from x2=220 to x1=0, and y2=419 to y1=0. So it was moving from (currentX+220, currentY+419) to (currentX +0, currentY +0) which = itself
To solve this instance simply negate and switch the values of the second slide declaration like so:
TranslateAnimation slide;
if(arg0 == img1)
{
//translate from img view 1 to img view 2
slide = new TranslateAnimation(Animation.ABSOLUTE,x1,Animation.ABSOLUTE, x2,Animation.ABSOLUTE, y1,Animation.ABSOLUTE,y2 );
}
else
{
// translate from img view 2 to img view 1
// slide = new TranslateAnimation(Animation.ABSOLUTE,x2,Animation.ABSOLUTE, x1,Animation.ABSOLUTE,y2,Animation.ABSOLUTE,y1);
slide = new TranslateAnimation(Animation.ABSOLUTE,0,Animation.ABSOLUTE, (-x2),Animation.ABSOLUTE,0,Animation.ABSOLUTE, (-y2));
}
This only happens because your top left sprite is at 0,0 though. You have to seriously rethink how you're moving your sprites around. Just remember, the TranslateAnimation moves them relative to their current positions, basically setting the sprites original location to (0,0).
Could be wrong, but hope it helps. It worked for me...
Sorry it took so long to get back to you, I lost your post and couldn't find it again for some reason. Glad you had commented earlier!
I want to add a view inside a FrameLayout programmatically and to place it in a specific point within the layout with a specific width and height. Does FrameLayout support this? If not, should I use an intermediate ViewGroup to achieve this?
int x; // Can be negative?
int y; // Can be negative?
int width;
int height;
View v = new View(context);
// v.setLayoutParams(?); // What do I put here?
frameLayout.addView(v);
My initial idea was to add an AbsoluteLayout to the FrameLayout and place the view inside the AbsoluteLayout. Unfortunately I just found out that AbsoluteLayout is deprecated.
Any pointers will be much appreciated. Thanks.
The following example (working code) shows how to place a view (EditText) inside of a FrameLayout. Also it shows how to set the position of the EditText using the setPadding setter of the FrameLayout (everytime the user clicks on the FrameLayout, the position of the EditText is set to the position of the click):
public class TextToolTestActivity extends Activity{
FrameLayout frmLayout;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
frmLayout = (FrameLayout)findViewById(R.id.frameLayout1);
frmLayout.setFocusable(true);
EditText et = new EditText(this);
frmLayout.addView(et,100,100);
frmLayout.setOnTouchListener(new OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
Log.i("TESTING","touch x,y == " + event.getX() + "," + event.getY() );
frmLayout.setPadding(Math.round(event.getX()),Math.round(event.getY()) , 0, 0);
return true;
}
});
}
}
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<FrameLayout
android:id="#+id/frameLayout1"
android:layout_height="fill_parent" android:layout_width="fill_parent">
</FrameLayout>
</LinearLayout>
You can also add a margin around the newly added view to position it inside the FrameLayout.
FrameLayout frameLayout = (FrameLayout) findViewById(R.id.main); // or some other R.id.xxx
DisplayMetrics metrics = context.getResources().getDisplayMetrics();
LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
params.setMargins(0, metrics.heightPixels - 20, 0, 0);
View v = new View(context);
v.setLayoutParams(params);
frameLayout.addView(v);
This will position the FrameLayout 20 pixels from the bottom of the screen.
Edit: completed the example so it stands by itself. And oh, yes it does work.
It's true that with FrameLayout all children are pegged to the top left of the screen, but you still have some control with setting their padding. If you set different padding values to different children, they will show up at different places in the FrameLayout.
From the link Quinn1000 provided:
You can add multiple children to a FrameLayout, but all children are pegged to the top left of the screen.
This means you can't put your View at a specific point inside the FrameLayout (except you want it to be at the top left corner :-)).
If you need the absolute positioning of the View, try the AbsoluteLayout:
A layout that lets you specify exact locations (x/y coordinates) of its children. Absolute layouts are less flexible and harder to maintain than other types of layouts without absolute positioning.
As for setting the width and height of the View, also like Quinn1000 said, you supply the v.setLayoutParams() method a LayoutParams object, depending on the container you chose (AbsoluteLayout, LinearLayout, etc.)
The thread here on stackOverflow at
How do you setLayoutParams() for an ImageView?
covers it somewhat.
For instance:
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(30, 30);
yourImageView.setLayoutParams(layoutParams);
implies that you need to be defining a LinearLayout.LayoutParams (or in your case a FrameLayout.layoutParams) object to pass to the setLayoutParams method of your v object.
At
http://developer.android.com/reference/android/widget/FrameLayout.html
it almost makes it looks like you could ask your v to:
generateDefaultLayoutParams () via this method if you have not defined the parameters specifically.
But it's late, and those links are making my eyes bleed a little. Let me know if they nhelp any :-)