I'm developing an android app which requires an imageview (and textviews) to be updated on button click, but I want the image to match the height of four of my textviews. When I set the height of the imageview, it seems to keep the height of the previous update, not the current one. Here is my code to update the image and its height.
int nameHeight = t_name.getHeight();
int timeHeight = r_time.getHeight();
int dateHeight = r_date.getHeight();
int locaHeight = r_loca.getHeight();
int totalHeight = nameHeight + timeHeight + dateHeight + locaHeight;
i_img.getLayoutParams().height = totalHeight;
Bitmap image = getBitmapFromURL(event_image.get(eventToUse));
i_img.setImageBitmap(image);
After touching the layout params, call requestLayout() to have the changes take effect.
Related
I want to place some images (triggered on click action) inside a layout. I have to place them such that they don't get out of the parent layout.
Code I'm using to add a new image on clicking the layout:
LinearLayout layout = (LinearLayout) findViewById(R.id.layout);
ImageView image = new ImageView(this);
LinearLayout.LayoutParams coordinates = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
image.setLayoutParams(coordinates);
image.setImageResource(R.drawable.image);
layout.addView(image);
If I press on the layout , I must see my imageView put randomly.
Random random = new Random();
int x = random.nextInt(layout.getWidth());
int y = random.nextInt(layout.getHeight());
image.setX(x);
image.setY(y);
But this won't do it. And I see those images outside my layout too.
You are setting x & y which are upper left-top corner - starting point of image to display it. As x/y value can be right/bottom corner, therefore, your image goes out of layout in that case.
Please note - x, y are starting point from where your image will be drawn.
You need to make sure that layoutWidth - x >= imageWidth and layoutHeight - y >= imageHeight.
This is driving me crazy. I would like to be able to resize an xml vector drawable icon programmatically in order to use it in an ImageView.
This is what I've done so far which is not working
Drawable drawable = ResourcesCompat.getDrawable(getResources(),R.drawable.ic_marker,null);
drawable.setBounds(0,0,512,512);
imageVenue.setImageDrawable(drawable);
The vector icon ic_marker is not resized. It just keeps the hardcoded width and height values every time.
Any ideas?
You can change the width and height of your imageview programmatically. Since vector drawables will preserve the original quality of the image, this will make the desired output happen.
ImageView iv = (ImageView) findViewById(R.id.imgview);
int width = 60;
int height = 60;
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(width,height);
iv.setLayoutParams(params);
I'm currently facing the same problem.
I'm trying something like this, cause ViewParent has actually height set explicitly, so I use match_parent and set margins. It doesn't work all the time though, cause I simply use this view in a viewholder for RecyclerView... Also I've noticed that sometimes I see scaled up version with artifacts, sometimes full size, sometimes there are margins, and bigger margins... But it still might work for you, if you use it in a simpler scenario.
mImageViewFront.setImageDrawable(vectorDrawable);
final int paddingLR = mImageViewFront.getWidth() / 4;
final int paddingTB = mImageViewFront.getHeight() / 4;
LayoutParams params = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
params.setMargins(paddingLR, paddingTB, paddingLR, paddingTB);
mImageViewFront.setLayoutParams(params);
I want to get the actual screen height of the device that runs my app. To achieve this i try the following:
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
int Height = metrics.heightPixels;
TextView HeightView = (TextView) findViewById(R.id.screenHeight);
HeightView.setText("Screen Height: " + Height);
int Width = metrics.widthPixels;
TextView WidthView = (TextView) findViewById(R.id.screenWidth);
WidthView.setText("Screen Width: " + Width);
The device that I run using the emulator has a screen width of 1080 pixels and a screen height of 1920 pixels. The width is displayed correctly (1080 pixels) but the height is according to the app only 1776 pixels. What do I need to make my app display the correct screen height? Is metrics.heightPixels a bad way of getting the screen height?
see this answer
if your API level > 13 try this if you are in activity
Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
int width = size.x;
int height = size.y;
If you're not in an Activity you can get the default Display via WINDOW_SERVICE:
WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
Display display = wm.getDefaultDisplay();
getWidth and getHeight is for API level 13 or less
UPDATE
For API 17 and higher method Display.getRealSize() returns full size of screen, as mentioned in documentation:
Gets the real size of the display
without subtracting any window decor or applying any compatibility
scale factors.
The size is adjusted based on the current rotation of the display.
The real size may be smaller than the physical size of the screen when
the window manager is emulating a smaller display (using adb shell am
display-size).
int width=Resources.getSystem().getDisplayMetrics().widthPixels;
int height=Resources.getSystem().getDisplayMetrics().heightPixels;
I needed to get the actual available height, and out of all the options this is the only thing that worked for me.
Create a rectangle, and get its dimensions:
Rect r = new Rect();
activityRootView.getWindowVisibleDisplayFrame(r);
int screenHeight = r.bottom - r.top;
where activityRootView is the root view of your layout.
If you need to extract the toolbar height:
int availableScreenHeight = screenHeight - toolbar.getHeight();
where toolbar is your toolbar view.
availableScreenHeight will now be without the statusbar, without the toolbar, and without the navigation bar (if the device is using it).
you can use this code:
val display = windowManager.defaultDisplay
val size = Point()
display.getSize(size)
val width: Int = size.x
val height: Int = size.y
You can try this:
WindowManager wm = getWindowManager();
Display d = wm.getDefaultDisplay();
Point size = new Point();
d.getSize(size);
Log.i("LOG", "W=" + size.x + " , H=" + size.y);
so I have written the following method in my activity:
private void setDisplayMetrics(){
DisplayMetrics metrics = this.getResources().getDisplayMetrics();
int dh = metrics.heightPixels;
int dw = metrics.widthPixels;
if(dw < dh){
deviceWidth = dw;
deviceHeight = dh;
}else{
deviceWidth = dh;
deviceHeight = dw;
}
System.err.println("--------------> dh : "+deviceHeight+" | dw "+deviceWidth);
}
And it works great, in the sense that it gets me the total width and height of the screen with great accuracy and reliability (which is what I have asked it to do).
Here is the problem. On older android devices the screen dimensions are the same as the dimensions the application can take up, and the script above helps me to set the size of elements in the app. BUT with android ICS I have this graphic button bar on the bottom of the screen, and it messes up my whole strategy.
What I would really like is the ability to get the available app dimensions for the portrait view as well as the landscape view at the same time in one method. And have these dimensions be accurate regardless of the presence of the bar pictured above.
Does anyone know how to achieve this?
Rect rectgle= new Rect();
Window window= getWindow();
window.getDecorView().getWindowVisibleDisplayFrame(rectgle);
int StatusBarHeight= rectgle.top;
int contentViewTop=
window.findViewById(Window.ID_ANDROID_CONTENT).getTop();
int TitleBarHeight= contentViewTop - StatusBarHeight;
Log.i("*** Jorgesys :: ", "StatusBar Height= " + StatusBarHeight + " , TitleBar Height = " + TitleBarHeight);
From what I've read so far you can't get this height directly. The approach via getWindowVisibleDisplayFrame() does not seem to work.
The only promising solution I have found so far is using a custom layout to measure the screen size as explained in
http://evgeni-shafran.blogspot.de/2011/01/android-screen-size-problem.html.
I am convinced that this will work but to me it seems to be more trouble than it is worth.
I have a square image in an ImageView contained within a FrameLayout that is right aligned (landscape layout). The FrameLayout is set to FillParent width and height and the ImageView is set to Adjust View Bounds so that the resulting ImageView is a perfect square with each side being the length of the height of the landscape layout, right aligned. However, the original image is larger than this.
I need to get the coordinates clicked on the ImageView in relation to itself (ie. the top left hand corner of the ImageView is 0,0 and the bottom right corner would be the displayed width and height coordinates) so that I can work out if the clicked point was past the mid-point of the ImageView.
I initially get the size of the ImageView using:
int myImageViewWidth = imageView.getWidth();
int myImageViewHeight = imageView.getHeight();
I've created an OnTouchListener and within this I'm using event.getX() and event.getY(), but this seems to return the coordinates relative to the image's oiginal size, not the displayed size. I've also tried the following:
Matrix m = imageView.getImageMatrix();
float[] values = new float[9];
m.getValues(values);
float relativeX = (event.getX() - values[2]) / values[0];
float relativeY = (event.getY() - values[5]) / values[4];
But again this seems to return inaccurate coordinates. Can anyone please help?