I am having a Relative layout with few images in it like this below.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ImageView
android:id="#+id/image_2"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_alignLeft="#+id/increase"
android:layout_alignParentTop="true"
android:layout_marginLeft="34dp"
android:layout_marginTop="34dp"
android:src="#drawable/ic_launcher" />
<ImageView
android:id="#+id/image_1"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_alignBottom="#+id/image_2"
android:layout_marginBottom="14dp"
android:layout_toRightOf="#+id/increase"
android:src="#drawable/ic_launcher" />
<ImageView
android:id="#+id/image_8"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:src="#drawable/ic_launcher" />
</RelativeLayout>
and in my java file i need to perform a small task.
When i click an image it's size should be increased.
I tried this and it was working and this is my code
public class MainActivity extends Activity implements OnClickListener {
View imageView;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ImageView i1 = (ImageView ) findViewById(R.id.image_1);
ImageView i2 = (ImageView ) findViewById(R.id.image_2);
ImageView i3 = (ImageView ) findViewById(R.id.image_8);
i1.setOnClickListener(this);
i2.setOnClickListener(this);
i3.setOnClickListener(this);
}
public void onClick(View arg0) {
Log.v("clicked ", "clicked");
imageView = arg0;
Toast.makeText(this, "looking to resize the image ", 1).show();
Toast.makeText(this, "clicked 2", 1).show();
height = imageView.getHeight();
width = imageView.getWidth();
height += 50;
width += 50;
imageView.setLayoutParams(new RelativeLayout.LayoutParams(height, width));
}
}
But i am facing a problem.
when i click the image its position is changing.
Consider these screen shots ..
The below is the screen shot when the application is launched
and below is the screen shot when an image view is clicked.
Can anyone suggest me so that the image doesnt change its position
I can use something like using a grid view (if possible. but even i am trying to put some drag option to it. So can anyone suggest me please)
UPDATED CODE :
the onclick method is updated as below :
public void onClick(View arg0) {
Log.v("clicked ", "clicked");
imageView = arg0;
Toast.makeText(this, "looking to resize the image ", 1).show();
Toast.makeText(this, "clicked 2", 1).show();
height = imageView.getHeight();
width = imageView.getWidth();
height += 50;
width += 50;
RelativeLayout.LayoutParams params = new
RelativeLayout.LayoutParams(height, width);
params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT, RelativeLayout.TRUE);
params.setMargins(
imageView.getLeft()-30,imageView.getTop()-30,imageView.getRight()+30,
imageView.getBottom()+30);
imageView.setLayoutParams(params);
}
You create new layoutparams for a relative layout and only set the height and width. Therefore, the image view will default to top left of the parent relative layout. You also need to set the alignment and margin as you need.
Since you are using a relative layout, you need to create new RelativeLayout layoutParams:
http://developer.android.com/reference/android/widget/RelativeLayout.LayoutParams.html
Something like this:
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT, RelativeLayout.TRUE);
params.setMargins(left, top, right, bottom);
Good luck...
Related
I am working on an android project where I have a custom view. When the custom view is clicked, I want a to put a view (a circle) at each corner of the view.
At the moment I'm just trying to get it work in the top left corner but it ends up in the middle.
Below is my click function for adding the view.
View view = LayoutInflater.from(getContext()).inflate(R.layout.view, this, false);
TextView textItem = view.findViewById(R.id.lblItemText);
textItem.setText("View: " + counter);
view.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v)
{
Anchor anchor1 = new Anchor(getContext());
anchor1.setLeft(v.getLeft());
anchor1.setTop(CustomView.this.getTop());
CustomView.this.addView(anchor1);
}
});
The custom view is hosted inside a relative layout. The custom view extends RelativeLayout and the anchor view which is supposed to go into the top left corner of the custom view extends button.
The anchor constructor contains the following:
public Anchor(Context context)
{
super(context);
this.setBackgroundResource(R.drawable.anchor);
this.setPadding(0,0,0,0);
this.setWidth(1);
this.setHeight(1);
}
For some reason the anchor is appearing in the middle instead of being on the corner as shown below
Below is kind of expecting.
UPDATE
After a couple of days made some progress and I do have it working, except its using hardcoded values to get it in the right position, which doesn't seem right. I'm guessing this will only work on the specific device I'm testing on, another device with another resolution will be positioned wrong.
Below is the code I have that hopefully shows what is I am trying to achieve along with a screenshot as to what I have now.
private void createAnchorPoints()
{
//Main View
ViewGroup mainView = activity.findViewById(android.R.id.content);
int[] viewToBeResizedLoc = new int[2];
viewToBeResized.getLocationOnScreen(viewToBeResizedLoc);
//Add top left anchor
Anchor topLeftAnchor = new Anchor(context, Anchor.ResizeMode.TOP_LEFT);
FrameLayout.LayoutParams topLeftParms = new FrameLayout.LayoutParams(150,150);
topLeftParms.leftMargin = viewToBeResizedLoc[0] - 50;
topLeftParms.topMargin = viewToBeResizedLoc[1] - viewToBeResized.getHeight() - 30;
topLeftAnchor.setLayoutParams(topLeftParms);
mainView.addView(topLeftAnchor);
//Add top right anchor
Anchor topRightAnchor = new Anchor(context, Anchor.ResizeMode.TOP_RIGHT);
FrameLayout.LayoutParams topRightParms = new FrameLayout.LayoutParams(150, 150);
topRightParms.leftMargin = topLeftParms.leftMargin + viewToBeResized.getWidth() - 40;
topRightParms.topMargin = topLeftParms.topMargin;
topRightAnchor.setLayoutParams(topRightParms);
mainView.addView(topRightAnchor);
//Add bottom left anchor
Anchor bottomLeftAnchor = new Anchor(context, Anchor.ResizeMode.BOTTOM_LEFT);
FrameLayout.LayoutParams bottomLeftParms = new FrameLayout.LayoutParams(150, 150);
bottomLeftParms.leftMargin = topLeftParms.leftMargin;
bottomLeftParms.topMargin = topLeftParms.topMargin + viewToBeResized.getHeight() - 40;
bottomLeftAnchor.setLayoutParams(bottomLeftParms);
mainView.addView(bottomLeftAnchor);
//Add bottom right anchor
Anchor bottomRightAnchor = new Anchor(context, Anchor.ResizeMode.BOTTOM_RIGHT);
FrameLayout.LayoutParams bottomRightParms = new FrameLayout.LayoutParams(150, 150);
bottomRightParms.leftMargin = topRightParms.leftMargin;
bottomRightParms.topMargin = bottomLeftParms.topMargin;
bottomRightAnchor.setLayoutParams(bottomRightParms);
mainView.addView(bottomRightAnchor);
}
Since the top-level layout is a RelativeLayout, you will need to use the view positioning that is available to RelativeLayout to achieve what you want. (See the documentation.)
Here is a mock-up of what you want to achieve in XML. This mock-up will demonstrate how we can approach the actual solution. I am using standard views, but it shouldn't matter. The technique will apply to your custom views. The image is from Android Studio's designer, so no code was used to create the image.
activity_main.xml
<RelativeLayout
android:id="#+id/relativeLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<RelativeLayout
android:id="#+id/customView"
android:layout_width="150dp"
android:layout_height="150dp"
android:layout_centerInParent="true"
android:background="#android:color/holo_green_light" />
<ImageView
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_alignStart="#id/customView"
android:layout_alignTop="#id/customView"
android:src="#drawable/circle"
android:translationX="-10dp"
android:translationY="-10dp" />
<ImageView
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_alignEnd="#id/customView"
android:layout_alignTop="#id/customView"
android:src="#drawable/circle"
android:translationX="10dp"
android:translationY="-10dp" />
<ImageView
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_alignBottom="#id/customView"
android:layout_alignStart="#id/customView"
android:src="#drawable/circle"
android:translationX="-10dp"
android:translationY="10dp" />
<ImageView
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_alignBottom="#id/customView"
android:layout_alignEnd="#id/customView"
android:src="#drawable/circle"
android:translationX="10dp"
android:translationY="10dp" />
</RelativeLayout>
circle.xml
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval">
<!-- fill color -->
<solid android:color="#android:color/holo_red_light" />
<size
android:width="20dp"
android:height="20dp" />
</shape>
The Actual Solution
Now that we have demonstrated that the mocked-up approach works, we now have to reproduce the effect in code. We will have to add the circle view and position it within the parent RelativeLayout using RelativeLayout view positioning and translations. The following code shows just the top left circle positioned, but the other circles will be positioned in a similar way.
activity_main.java
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Drawable circle = ContextCompat.getDrawable(this, R.drawable.circle);
ImageView imageView = new ImageView(this);
imageView.setImageDrawable(circle);
int circleSize = dpToPx(CIRCLE_SIZE_DP);
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(circleSize, circleSize);
// Position top left circle within the custom view.
lp.addRule(RelativeLayout.ALIGN_START, R.id.customView);
lp.addRule(RelativeLayout.ALIGN_TOP, R.id.customView);
// Uncomment these 2 lines to position the top left circle with translation.
imageView.setTranslationX(-circleSize / 2);
imageView.setTranslationY(-circleSize / 2);
// Uncomment these 3 lines to position the top left circle with margins.
// View customView = findViewById(R.id.customView);
// lp.leftMargin = customView.getLeft() - circleSize / 2;
// lp.topMargin = customView.getTop() - circleSize / 2;
((RelativeLayout) findViewById(R.id.relativeLayout)).addView(imageView, lp);
}
private int dpToPx(int dp) {
return (int) (dp * getResources().getDisplayMetrics().density);
}
private static final int CIRCLE_SIZE_DP = 20;
}
The code above uses a shortened layout:
activity_main.xml
<RelativeLayout
android:id="#+id/relativeLayout"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<RelativeLayout
android:id="#+id/customView"
android:layout_width="150dp"
android:layout_height="150dp"
android:layout_centerInParent="true"
android:background="#android:color/holo_green_light" />
</RelativeLayout>
It is also possible to produce the same positioning using margins. The code to use margins is commented out but will work. (I think that negative margins may also work, but I have read that they are not officially supported, so I try to avoid them.)
I want to wrap an ImageView inside a LinearLayout so that I can center a group of views. However, the original image needs to be scaled down to fit in the ImageView, and the original size expands the LinearLayout, despite my use of adjustViewBounds="true" and an enclosing FrameLayout as suggested by previous questions on SO.
The desired layout should look like this,
but the observed layout looks like this,
as produced by the XML below:
<android.support.percent.PercentRelativeLayout
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"
tools:context="project.MainActivity">
<LinearLayout
android:layout_width="wrap_content"
app:layout_heightPercent="32%"
android:orientation="horizontal"
android:background="#b44343"
android:layout_centerHorizontal="true"
android:layout_alignParentTop="true">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Sample Text"/>
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#5555ae">
<ImageView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:background="#2c8c4c"
android:src="#drawable/spades_icon"
android:adjustViewBounds="true"
android:scaleType="centerInside"/>
</FrameLayout>
</LinearLayout>
</android.support.percent.PercentRelativeLayout>
I can't use the other suggestion of setting android:maxHeight="100dp" because I need the height to be relative to that of the screen.
I see that you have added android:adjustViewBounds="true".
You can combine that with android:maxWidth="60dp"
So your imageView should look like this.
<ImageView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:background="#2c8c4c"
android:src="#drawable/spades_icon"
android:adjustViewBounds="true"
android:maxWidth="60dp"
android:scaleType="centerInside"/>
You can change the max width to any number you want.
Things you can do:
1) Set a specific width / height to the FrameLayout enclosing the ImageView and set android:scaleType to centerInside, fitCenter, or fitXY for the ImageViwe.
2) Programatically, in your activity, after onCreate, in onResume for example, you can get the LayoutParams and change the width and height of the ImageView doing you own scaleing. I take this aproach when I scale against the screen widht or height at run time.
EDIT 1
Example of second alternative:
public class TestActivity extends AppCompatActivity {
ImageView imgView;
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.testactivity_layout);
imgView = (ImageView) findViewById(R.id.imgview);
}
#Override
protected void onResume() {
super.onResume();
ViewGroup.LayoutParams params = imgView.getLayoutParams();
params.width = 100;
}
}
Notes:
The width is expressed in pixel.
To get the display metrics:
How to get screen display metrics in application class
To establish a relative width for the ImageView, get the width of the display and calculate the desireed % as the width of the image.
Based on this answer to another question, a solution that removes the whitespace in the LinearLayout while preserving the height and aspect ratio of the image is:
#Override
public void onWindowFocusChanged(boolean hasFocus) {
LinearLayout layout = (LinearLayout) findViewById(R.id.mLinearLayout);
ImageView imageView = (ImageView) findViewById(R.id.mImageView);
TextView textView = (TextView) findViewById(R.id.mTextView);
layout.getLayoutParams().width = textView.getWidth()+imageView.getWidth();
layout.requestLayout();
}
EDIT:
Based on #Juan's answer and these instructions, the following code also achieves the desired result:
#Override
protected void onResume() {
DisplayMetrics displayMetrics = new DisplayMetrics();
this.getWindowManager()
.getDefaultDisplay()
.getMetrics(displayMetrics);
ViewGroup.LayoutParams params = imgView.getLayoutParams();
params.height = (int)Math.floor(displayMetrics.heightPixels * 0.32);
}
These is the result that I am after:
Basically I want to scale the 3 images so that they have the same height and all together fill the screen width. The original images will all have same height.
Can this be done using layout, without width calculations from code?
Just use Layout Weights.
In the main layout, or the layout which contains the ImageViews, put
android:weightSum="10"
and then in the individual ImageViews, put layout_weights as shown below, or upto your requirements.
This basically means the width of the images will be 25%, 55% and 20% respectively.
You can use a linear layout with weight attribute specified as shown below:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_width="0dp"
android:src="#drawable/bg_canvas"
android:layout_height="300dp"
android:layout_weight="0.33"/>
<ImageView
android:layout_width="0dp"
android:src="#drawable/bg_canvas"
android:layout_height="300dp"
android:layout_weight="0.33"/>
<ImageView
android:layout_width="0dp"
android:layout_height="300dp"
android:src="#drawable/bg_canvas"
android:layout_weight="0.33"/>
</LinearLayout>
Comment below if you need any further info
try this:
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="3"
android:orientation="horizontal">
<ImageView
android:id="#+id/imageView1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
.../>
<ImageView
android:id="#+id/imageView1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
.../>
<ImageView
android:id="#+id/imageView1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
.../>
</LinearLayout>
the "magic" is in the weight component. you define a total weight of 3 in the layout and your image views should take a third of it, so the value is 1.
For my case the images needed to be updated at runtime, so none of the answers were exact fit.
I ended up extending LinearLayout and writing a small routine that unifies all images heights and make sure that all images together fill the LinearLayout width. In case someone is trying to achieve the same, my code looks like this:
public class MyImgLayout extends LinearLayout
{
public MyImgLayout(Context context)
{
super(context);
}
public void setup(ArrayList<String> images)
{
this.setOrientation(LinearLayout.HORIZONTAL);
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 0);
this.setLayoutParams(layoutParams); //set 0 height until we calculate it in onMeasure
for (String image : images) {
ImageView ivArticle = new ImageView(getContext());
setImageFromName(image, ivArticle); //this where you set the image
this.addView(ivArticle);
}
}
private void scaleImages()
{
if(getMeasuredHeight() == 0 && getMeasuredWidth() > 0) {
if (isHorizontal) {
double childRatioSum = 0;
int images = 0;
for (int i = 0; i < getChildCount(); i++) {
ImageView iv = (ImageView) getChildAt(i);
double width = iv.getDrawable().getIntrinsicWidth();
double height = iv.getDrawable().getIntrinsicHeight();
if (height > 0) {
childRatioSum += width / height;
images++;
}
}
if (childRatioSum > 0 && images == getChildCount()) {
//all images are downloaded, calculate the container height
//(add a few pixels to makes sure we fill the whole width)
double containerHeight = (int) (getMeasuredWidth() / childRatioSum) + images * 0.5;
for (int i = 0; i < getChildCount(); i++) {
ImageView iv = (ImageView) getChildAt(i);
double width = iv.getDrawable().getIntrinsicWidth();
double height = iv.getDrawable().getIntrinsicHeight();
iv.setLayoutParams(new LinearLayout.LayoutParams((int) (width * (containerHeight / height)), (int) containerHeight));
iv.setScaleType(ImageView.ScaleType.CENTER_CROP);
}
LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) this.getLayoutParams();
params.width = LayoutParams.MATCH_PARENT;
params.height = (int) containerHeight;
this.setLayoutParams(params);
requestLayout();
}
}
}
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
scaleImages();
}
}
I try to create square buttons. When increasing the button's height, it disappears. However, when increasing it's width, everything works fine. What's going on there?
private void adjustButtons() {
final Button trainerButton = (Button) findViewById(R.id.bu_vocabulary_start_trainer);
trainerButton.setOnClickListener(new Button.OnClickListener() {
#Override
public void onClick(View arg0) {
ViewGroup.LayoutParams params = shareButton.getLayoutParams();
// params.width++; // works fine
params.height++; // button disappears
// params.height = params.width; // what I acutually want to do
shareButton.setLayoutParams(params);
}
});
}
The xml file
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="30dp"
android:orientation="horizontal" >
<Button
android:id="#+id/bu_vocabulary_start_trainer"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="#string/vocabulary_trainer" />
<Button
android:id="#+id/bu_vocabulary_start_administration"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="#string/vocabulary_administration" />
</LinearLayout>
try this,
private void adjustButtons() {
final Button trainerButton = (Button) findViewById(R.id.bu_vocabulary_start_trainer);
trainerButton.setOnClickListener(new Button.OnClickListener() {
#Override
public void onClick(View arg0) {
LinearLayout.LayoutParams params = shareButton.getLayoutParams();
// params.width++; // works fine
params.height++; // button disappears
// params.height = params.width; // what I acutually want to do
shareButton.setLayoutParams(params);
}
});
}
you should use dp number for your height and weight.
height++ doesn't work for wrap_content
First of all, WRAP_CONTENT is just an integer value, which maps to -2. Increasing it would change it to -1, which is MATCH_PARENT.
You see the situation now? Your LinearLayout has height WRAP_CONTENT. This means "make its height as large as need be to contain its children". If the children are set to MATCH_PARENT, that would mean "make them as large as their parent". This situation is resolved by making both parent and children 0 pixels high. Hence, they "disappear".
What you could do, though, is something like:
params.height = shareButton.getHeight() + 1;
This line might help you:
button.setLayoutParams (new LayoutParams(LayoutParams.WRAP_CONTENT, yourheight++);
I am developing an application in which I want to add image which can slide from left to right and from right to left like below image. That inner white play image should be move from left to right and Vice Versa.
What I have did so far is, I am able to move single image from left to right and vice versa but I want set background image as well like above rounded shaped black background.
Here is my code:
imageView.setOnTouchListener(new OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
int eid = event.getAction();
switch (eid) {
case MotionEvent.ACTION_MOVE:
RelativeLayout.LayoutParams mParams = (RelativeLayout.LayoutParams) imageView.getLayoutParams();
int x = (int) event.getRawX();
mParams.leftMargin = x - 50;
imageView.setLayoutParams(mParams);
break;
default:
break;
}
return true;
}
});
EDIT
I tried to manage background image by setting my layout xml like below:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<RelativeLayout
android:layout_width="250dp"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="49dp"
android:background="#drawable/set_user_profile_back"
android:paddingLeft="10dp"
android:paddingRight="10dp" >
<ImageView
android:id="#+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:contentDescription="#string/hello_world"
android:src="#drawable/next" />
</RelativeLayout>
</RelativeLayout>
But now I am facing problem with image size, image size is decreased in right how to solve this and how to fix start and end point for image movement.
Any idea and advice will be apppreciated
Can you please try this piece of code Juned
public class MainActivity extends Activity {
Button b1;
ImageView logo;
float width;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
b1 = (Button) findViewById(R.id.button1);
logo = (ImageView) findViewById(R.id.logo);
Display display = getWindowManager().getDefaultDisplay();
width = display.getWidth();
final Animation posX = new TranslateAnimation(0, width - 50, 0, 0);
posX.setDuration(1000);
posX.setFillAfter(true);
b1.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
logo.startAnimation(posX);
logo.setVisibility(View.VISIBLE);
}
});
}}