Android : Custom View not drawing

Android : Custom View not drawing - android

I'm getting a problem with a part of my Android application. I need to draw a graph in a custom Dialog box but it doesn't work even when I follow all the solutions found on the internet. My goal is to show a Dialog box when a user is clicking on a button on my main frame. To do this, I want to draw it in a very simple Dialog Box. My graph need to be "scrollable" because it can be bigger than the Dialog box. Here are the sources codes :
public class GraphDialog extends Dialog implements android.view.View.OnClickListener
{
Canvas canvas;
public GraphDialog(Context context)
{
super(context);
System.out.println("Test");
this.setContentView(R.layout.dialog_graph_layout);
this.setTitle(R.string.title_dialog_graph);
((Button) this.findViewById(R.id.button_ok)).setOnClickListener(this);
}
#Override
public void onClick(View v)
{
Controller.getPollManager().setPoll(null);
Controller.getPollManager().setTab(null);
this.cancel();
}
}
Here is my xml :
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin" >
<ScrollView
android:id="#+id/scroll_layout"
android:layout_width="500px"
android:layout_height="800px"
android:layout_weight="1"
android:drawingCacheQuality="low"
android:scrollbars="vertical" >
<be.ac.ucl.lfsab1509.proxipoll.GraphView
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</be.ac.ucl.lfsab1509.proxipoll.GraphView>
</ScrollView>
<Button
android:id="#+id/button_ok"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_weight="0"
android:text="#string/ok" />
</LinearLayout>
And here is my custom View :
public class GraphView extends View
{
Paint paint;
public GraphView(Context context)
{
super(context);
System.out.println("test GraphView");
this.setWillNotDraw(false);
init();
}
public GraphView(Context context, AttributeSet attrs)
{
super(context, attrs);
System.out.println("test GraphView");
this.setWillNotDraw(false);
init();
}
public void init()
{
paint = new Paint();
paint.setColor(Color.BLACK);
}
protected void onDraw(Canvas canvas)
{
super.onDraw(canvas);
System.out.println("test onDraw");
canvas.drawText(Controller.getPollManager().getPoll().name, 50, 50, paint);
this.draw(canvas);
}
}
To check what goes wrong, you can see that I have added some println(). When I try to show the Dialog box, I get all lines except the on of the onDraw() method. Does someone know what to do to make it work ?
Thank you

Try overriding onMeasure: when I last did any custom charting, I needed to do something like this.
#Override protected void onMeasure( int widthMeasureSpec, int heightMeasureSpec )
{
viewWidth = MeasureSpec.getSize( widthMeasureSpec );
viewHeight = MeasureSpec.getSize( heightMeasureSpec );
if(box.getWidth() != 0){
// use the screen width: oldViewWidth -> screenWidth, viewWidth -> maxXRange
boxWidth = box.getWidth() - box.getPaddingRight() - box.getPaddingLeft() - 10;
if(screenWidth <= 0) viewWidth = boxWidth;
else viewWidth = (int)((getMaxXRange()*boxWidth)/screenWidth);
if(viewWidth < boxWidth) viewWidth = boxWidth;
}
setMeasuredDimension( viewWidth, viewHeight );
}
This basically checks the size of the window and tells the graphics layer how big I want it to be.

Related

how to set android:layout_centerInParent="true" attribute in custom view

i am continuously searching and trying to sort out a issue in custom view and Relative layout.
i found multiple solution but only few of solution are usefull,but they not fulfilling my requirement completely.
partial solution 1.
partial solution 2.
via these solution i can manage the height and width of my custom view, but i just want to align my custom view in center of parent RelativeLayout,
code which i am trying throw hit-and-run is below. ;)
JAVA CODE
public class MyActiveView extends View {
public Movie mMovie;
public long movieStart;
private int gifId;
public MyActiveView(Context context, AttributeSet attrs) {
super(context, attrs);
initializeView();
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int parentWidth = MeasureSpec.getSize(widthMeasureSpec);
int parentHeight = MeasureSpec.getSize(heightMeasureSpec);
this.setMeasuredDimension(parentWidth / 2, parentHeight);
}
private void initializeView() {
InputStream is = getContext().getResources().openRawResource(R.raw.pj_logo1);
mMovie = Movie.decodeStream(is);
}
#Override
protected void onDraw(Canvas canvas) {
canvas.drawColor(Color.TRANSPARENT);
super.onDraw(canvas);
long now = android.os.SystemClock.uptimeMillis();
if (movieStart == 0) {
movieStart = now;
}
if (mMovie != null) {
int relTime = (int) ((now - movieStart) % mMovie.duration());
mMovie.setTime(relTime);
mMovie.draw(canvas, getWidth() - mMovie.width(), getHeight() - mMovie.height());
this.invalidate();
}
}
public int getActiveResource() {
return this.gifId;
}
public void setActiveResource(int resId) {
this.gifId = resId;
initializeView();
}
}
XML CODE
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="#+id/backsourceImagesplash"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="fitXY"
android:src="#drawable/bg_blur" />
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="#color/colorTransparentWhite" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="256dp"
android:layout_centerVertical="true"
android:gravity="centre">
<pj.com.pjlib.activity_base.support_class.MyActiveView
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>
i want to set my custom active view layout in centre of its parent Relative Layout, but stuked in it. any help will be appreciated.
check the alignment of both image,i am trying for attribute android:layout_centerInParent="true", according to Relative layout support the "congrats image" should be in center, but it's not happening.
so i am thinking,i missed something in my custom view class but what is that, i don't know.

Change android:gravity="centre" with android:gravity="center" in Relative Layout. I think this will helpful to you.

Button Layout with Profile Picture Alignment

I want to create buttons that look like in the picture. Inside the circle (which is transparent in the png) I want to place the profile picture of players. There should also be text on the blue bar.
I've got it working but it just seems way too complicated. I think it is easier to understand what I have done without giving code but if you need it I can add it. Here is the layout:
RelativeLayout
LinearLayout (horizontal orientation)
Empty view with weight 0.7
Profile Picture with weight 0.2
Empty view with weight 0.1
the overlay picture that I posted below
LinearLayout (horizontal orientation)
RelativeLayout with weight 0.7 (space where all the text can go)
empty view with weigh 0.3
By the way: to the right of the circle, the png isn't transparent but white!
This works well but there must be a better way! All these empty views just to align the picture to the right position is kind of ugly. And the fact that the overlay picture must go inbetween the profile picture and the text makes it even uglier.
I'd prefer to do it without a png as overlay but with simple shapes (so that it looks good on every screen) but I wouldn't know how to do that. Would you recommend that? And if yes, how could that be done?
Or do you have an idea how to improve the xml layout or how to do it otherwise.
Thanks very much

You can do it without any image:
Layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="60dp"
android:weightSum="1.0">
<TextView
android:layout_weight="0.7"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:text="New Text"
android:id="#+id/textView"
android:background="#0073ff"/>
<ImageView
android:layout_weight="0.2"
android:layout_width="0dp"
android:layout_height="match_parent"
android:background="#drawable/half_round_drawable"
android:src="#drawable/profile"/>
</LinearLayout>
</LinearLayout>
half_round_drawable:
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item>
<shape android:shape="oval">
<corners android:radius="16dp" />
<solid android:color="#0073ff" />
</shape>
</item>
<item
android:bottom="0dp"
android:right="32dp"> <!-- radius *2 -->
<shape>
<solid android:color="#0073ff" />
</shape>
</item>
</layer-list>
To make the profile-image round you should use something like this:
How to create a circular ImageView in Android?

You can use a simple LinearLayout if you confine the background image to the profile area at the right side. You can define the content area in the image itself if you use a nine-patch drawable, as follows:
Extract the profile portion from your background image file.
Create a nine patch drawable from it, defining all the area as stretchable (left and top border lines), and the empty circle as the content area (right and bottom lines).
Since you should ideally have the image at the foreground layer to ensure that the photo isn't drawn outside of the circle, you can use a FrameLayout with a foreground drawable to contain your profile photo's ImageView. There would also need to be another dummy child view to work around a bug in FrameLayout that causes a single child with match_parent dimensions to be layout incorrectly.
This is how the layout should look like at the end:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="#+id/text"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#00f" />
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:foreground="#drawable/profile_bg">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent" />
<ImageView
android:id="#+id/photo"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</FrameLayout>
</LinearLayout>

Now I am ready to present my answer.
Portret:
Landscape:
Layout.xml:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:shape="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
tools:context=".MainActivity">
<!--This is the CustomView which include -->
<!--own attributes: -->
<!--circle_radius is the radius of image, -->
<!--content_padding is the padding,-->
<!--and background_color is the color of shape.-->
<CustomShape
android:layout_width="match_parent"
android:layout_height="wrap_content"
shape:circle_radius="40dp"
shape:content_padding="8dp"
shape:background_color="#FF983493">
<!--There must be two Views:-->
<!--TextView and ImageView and only in this order.-->
<!--Set-->
<!--android:layout_width="wrap_content"-->
<!--android:layout_height="wrap_content"-->
<!--to bot of them, because in CustomShape it will be-->
<!--resized for you. There also don`t need to set -->
<!--any kind of margin or location attributes.-->
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/txt"
android:padding="5dp"
android:textColor="#android:color/white"
android:text="sdsfkjsdkfhsdk flsdkfjkls asdfasd fklasdjl fkjasdklfjasd k "
android:background="#android:color/transparent"/>
<!--For RoundImage I use custom class which round the drawable,-->
<!--not a View. Look down.-->
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/img"
android:src="#drawable/img"
android:scaleType="fitCenter"
android:background="#android:color/transparent" />
</CustomShape>
</RelativeLayout>
CustomShape class:
public class CustomShape extends RelativeLayout {
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
int circleRadius; // image radius
int diameter; // image diameter
int contentPadding;
int semiPadding;
int rectRightSide;
int backgroundColor;
int viewWidth; // width of parent(CustomShape layout)
public CustomShape(Context context) {
super(context);
this.setWillNotDraw(false);
}
public CustomShape(Context context, AttributeSet attrs) {
super(context, attrs);
TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.CustomShape, 0, 0);
try {
this.circleRadius = (int) ta.getDimension(R.styleable.CustomShape_circle_radius, 40);
this.contentPadding = (int) ta.getDimension(R.styleable.CustomShape_content_padding, 8);
this.backgroundColor = ta.getColor(R.styleable.CustomShape_background_color, 0);
this.semiPadding = contentPadding / 2;
this.diameter = circleRadius * 2;
} finally {
ta.recycle();
}
this.setWillNotDraw(false);
}
public CustomShape(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
this.setWillNotDraw(false);
}
#Override
protected void onSizeChanged(int xNew, int yNew, int xOld, int yOld) {
super.onSizeChanged(xNew, yNew, xOld, yOld);
viewWidth = xNew;
this.rectRightSide = viewWidth - circleRadius - (circleRadius / 2); // get position for image
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
ImageView img = (ImageView) this.getChildAt(1);
RelativeLayout.LayoutParams imgParams = new LayoutParams(diameter - contentPadding, diameter - contentPadding);
imgParams.leftMargin = rectRightSide - circleRadius + semiPadding;
imgParams.topMargin = semiPadding;
img.setLayoutParams(imgParams);
//Create custom RoundImage and set to image
try {
Drawable drawable = img.getDrawable();
Bitmap bm = ((BitmapDrawable) drawable).getBitmap();
RoundImage resultImage = new RoundImage(bm);
img.setImageDrawable(resultImage);
} catch (ClassCastException e) {
}
//Positioning and resizing TextView
View txt = this.getChildAt(0);
RelativeLayout.LayoutParams txtParams = new LayoutParams(rectRightSide - circleRadius - semiPadding, diameter - contentPadding);
txtParams.topMargin = semiPadding;
txtParams.leftMargin = semiPadding;
txt.setLayoutParams(txtParams);
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int parentWidth = MeasureSpec.getSize(widthMeasureSpec);
this.setMeasuredDimension(parentWidth, diameter); // set correct height
}
#Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
paint.setColor(backgroundColor);
canvas.drawRect(0, 0, rectRightSide, diameter, paint);
//Draw circle
paint.setDither(true);
canvas.drawCircle(rectRightSide, circleRadius, circleRadius, paint);
}
}
Attr.xml:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="CustomShape">
<attr name="circle_radius" format="dimension" />
<attr name="content_padding" format="dimension" />
<attr name="background_color" format="color" />
</declare-styleable>
</resources>
RoundImage class:
public class RoundImage extends Drawable {
private final Bitmap mBitmap;
private final Paint mPaint;
private final RectF mRectF;
private final int mBitmapWidth;
private final int mBitmapHeight;
public RoundImage(Bitmap bitmap) {
mBitmap = bitmap;
mRectF = new RectF();
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setDither(true);
final BitmapShader shader = new BitmapShader(bitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
mPaint.setShader(shader);
mBitmapWidth = mBitmap.getWidth();
mBitmapHeight = mBitmap.getHeight();
}
#Override
public void draw(Canvas canvas) {
canvas.drawOval(mRectF, mPaint);
}
#Override
protected void onBoundsChange(Rect bounds) {
super.onBoundsChange(bounds);
mRectF.set(bounds);
}
#Override
public void setAlpha(int alpha) {
if (mPaint.getAlpha() != alpha) {
mPaint.setAlpha(alpha);
invalidateSelf();
}
}
#Override
public void setColorFilter(ColorFilter cf) {
mPaint.setColorFilter(cf);
}
#Override
public int getOpacity() {
return PixelFormat.TRANSLUCENT;
}
#Override
public int getIntrinsicWidth() {
return mBitmapWidth;
}
#Override
public int getIntrinsicHeight() {
return mBitmapHeight;
}
public void setAntiAlias(boolean aa) {
mPaint.setAntiAlias(aa);
invalidateSelf();
}
#Override
public void setFilterBitmap(boolean filter) {
mPaint.setFilterBitmap(filter);
invalidateSelf();
}
#Override
public void setDither(boolean dither) {
mPaint.setDither(dither);
invalidateSelf();
}
public Bitmap getBitmap() {
return mBitmap;
}
}
Hope it will help you.

What is the the mistake here, using the customized view class from xml?

i am new in android development and trying to get help. i am trying to use the customized view class MyView from the main layout.xml file.i have double checked and there is no error showing and also manifest is correct but still not working.it is forcing close. here is my code for xml file
<LinearLayout 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"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<com.example.drawingacircle.MyView
android:id="#+id/mview"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
and the java file
public class MyView extends View {
public MyView(Context context) {
super(context);
// TODO Auto-generated constructor stub
}
#Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
super.onDraw(canvas);
int x = getWidth();
int y = getHeight();
int radius;
radius = 100;
Paint paint = new Paint();
paint.setAntiAlias(true);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(5);
paint.setColor(Color.WHITE);
canvas.drawPaint(paint);
// Use Color.parseColor to define HTML colors
paint.setColor(Color.parseColor("#e5e5e5"));
canvas.drawCircle(x / 2, y / 2, radius, paint);
}}
what is the problem here i cannot find out.please help cordially. thank you.

Try to add other constructor with AttributeSet to you class:
public MyView(Context context, AttributeSet attrs){
super(context, attrs);
}
Everything other is ok.

How to draw beyound view translation limits?

The following program draws a pie (partial circle, a sector) while I expect it draw entire (full round) circle. How to draw entire circle?
The code of custom view:
public class CentralCircleView extends View {
private Paint circlePaint = new Paint();
{
circlePaint.setColor(Color.RED);
circlePaint.setAntiAlias(true);
}
public CentralCircleView(Context context) {
super(context);
}
public CentralCircleView(Context context, AttributeSet attrs) {
super(context, attrs);
}
#Override
protected void onDraw(Canvas canvas) {
canvas.drawCircle(0, 0, 100, circlePaint);
}
}
The code of activity:
public class TransformsActivity extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
CentralCircleView centralCircleView = (CentralCircleView) findViewById(R.id.centralCircleView);
centralCircleView.setTranslationX(200f);
centralCircleView.setTranslationY(200f);
centralCircleView.invalidate();
}
}
The code of layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<com.inthemoon.incubation.CentralCircleView
android:id="#+id/centralCircleView"
android:layout_marginLeft="0dp"
android:layout_marginTop="0dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
/>
</RelativeLayout>
This is what it draws. Where is the rest of the circle?

Your View has its height set to wrap_content which means you need to implement the method onMeasure() to tell RelativeLayout how big the view wants to be.

To draw "outside the view" one should use clipRect() method. For example, in my case, I was to write onDraw() in the following way:
protected void onDraw(Canvas canvas) {
canvas.clipRect(new Rect(-100,-100,100,100), Region.Op.UNION);
canvas.drawCircle(0, 0, 100, circlePaint);
}

How to make a vertical SeekBar in Android?

Can a SeekBar be vertical? I am not very good at UI design, so how can I make the SeekBar more beautiful, please give me some templates and examples.

For API 11 and later, can use seekbar's XML attributes(android:rotation="270") for vertical effect.
<SeekBar
android:id="#+id/seekBar1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:rotation="270"/>
For older API level (ex API10), only use Selva's answer:
https://github.com/AndroSelva/Vertical-SeekBar-Android

Here is a very good implementation of vertical seekbar.
Have a look.
http://560b.sakura.ne.jp/android/VerticalSlidebarExample.zip
And Here is my own implementation for Vertical and Inverted Seekbar based on this
https://github.com/AndroSelva/Vertical-SeekBar-Android
protected void onDraw(Canvas c) {
c.rotate(-90);
c.translate(-getHeight(),0);
super.onDraw(c);
}
#Override
public boolean onTouchEvent(MotionEvent event) {
if (!isEnabled()) {
return false;
}
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
case MotionEvent.ACTION_MOVE:
case MotionEvent.ACTION_UP:
int i=0;
i=getMax() - (int) (getMax() * event.getY() / getHeight());
setProgress(i);
Log.i("Progress",getProgress()+"");
onSizeChanged(getWidth(), getHeight(), 0, 0);
break;
case MotionEvent.ACTION_CANCEL:
break;
}
return true;
}

Working example
import android.content.Context;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.view.MotionEvent;
public class VerticalSeekBar extends SeekBar {
public VerticalSeekBar(Context context) {
super(context);
}
public VerticalSeekBar(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public VerticalSeekBar(Context context, AttributeSet attrs) {
super(context, attrs);
}
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(h, w, oldh, oldw);
}
#Override
public synchronized void setProgress(int progress) // it is necessary for calling setProgress on click of a button
{
super.setProgress(progress);
onSizeChanged(getWidth(), getHeight(), 0, 0);
}
#Override
protected synchronized void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(heightMeasureSpec, widthMeasureSpec);
setMeasuredDimension(getMeasuredHeight(), getMeasuredWidth());
}
protected void onDraw(Canvas c) {
c.rotate(-90);
c.translate(-getHeight(), 0);
super.onDraw(c);
}
#Override
public boolean onTouchEvent(MotionEvent event) {
if (!isEnabled()) {
return false;
}
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
case MotionEvent.ACTION_MOVE:
case MotionEvent.ACTION_UP:
setProgress(getMax() - (int) (getMax() * event.getY() / getHeight()));
onSizeChanged(getWidth(), getHeight(), 0, 0);
break;
case MotionEvent.ACTION_CANCEL:
break;
}
return true;
}
}
There, paste the code and save it. Now use it in your XML layout:
<android.widget.VerticalSeekBar
android:id="#+id/seekBar1"
android:layout_width="wrap_content"
android:layout_height="200dp"
/>
Make sure to create a package android.widget and create VerticalSeekBar.java under this package

Try:
<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" >
<SeekBar
android:id="#+id/seekBar1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:rotation="270"
/>
</RelativeLayout>

We made a vertical SeekBar by using android:rotation="270":
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent">
<SurfaceView
android:id="#+id/camera_sv_preview"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<LinearLayout
android:id="#+id/camera_lv_expose"
android:layout_width="32dp"
android:layout_height="200dp"
android:layout_centerVertical="true"
android:layout_alignParentRight="true"
android:layout_marginRight="15dp"
android:orientation="vertical">
<TextView
android:id="#+id/camera_tv_expose"
android:layout_width="32dp"
android:layout_height="20dp"
android:textColor="#FFFFFF"
android:textSize="15sp"
android:gravity="center"/>
<FrameLayout
android:layout_width="32dp"
android:layout_height="180dp"
android:orientation="vertical">
<SeekBar
android:id="#+id/camera_sb_expose"
android:layout_width="180dp"
android:layout_height="32dp"
android:layout_gravity="center"
android:rotation="270"/>
</FrameLayout>
</LinearLayout>
<TextView
android:id="#+id/camera_tv_help"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_alignParentBottom="true"
android:layout_marginBottom="20dp"
android:text="#string/camera_tv"
android:textColor="#FFFFFF" />
</RelativeLayout>
Screenshot for camera exposure compensation:

I used Selva's solution but had two kinds of issues:
OnSeekbarChangeListener did not work properly
Setting progress programmatically did not work properly.
I fixed these two issues. You can find the solution (within my own project package) at
https://github.com/jeisfeld/Augendiagnose/blob/master/AugendiagnoseIdea/augendiagnoseLib/src/main/java/de/jeisfeld/augendiagnoselib/components/VerticalSeekBar.java

This worked for me, just put it into any layout you want to.
<FrameLayout
android:layout_width="32dp"
android:layout_height="192dp">
<SeekBar
android:layout_width="192dp"
android:layout_height="32dp"
android:layout_gravity="center"
android:rotation="270" />
</FrameLayout>

Wrap it inside a FrameLayout so that there is no Size issue.
<FrameLayout
android:layout_width="#dimen/_20dp"
android:layout_marginStart="#dimen/_15dp"
android:layout_marginEnd="#dimen/_15dp"
android:layout_height="match_parent"
android:orientation="vertical">
<SeekBar
android:layout_width="150dp"
android:layout_height="30dp"
android:layout_gravity="center"
android:rotation="270" />
</FrameLayout>

Note, it appears to me that if you change the width the thumb width does not change correctly.
I didn't take the time to fix it right, i just fixed it for my case. Here is what i did.
Couldn't figure out how to contact the original creator.
public void setThumb(Drawable thumb) {
if (thumb != null) {
thumb.setCallback(this);
// Assuming the thumb drawable is symmetric, set the thumb offset
// such that the thumb will hang halfway off either edge of the
// progress bar.
//This was orginally divided by 2, seems you have to adjust here when you adjust width.
mThumbOffset = (int)thumb.getIntrinsicHeight();
}

When moving the thumb with an EditText, the Vertical Seekbar setProgress may not work. The following code can help:
#Override
public synchronized void setProgress(int progress) {
super.setProgress(progress);
updateThumb();
}
private void updateThumb() {
onSizeChanged(getWidth(), getHeight(), 0, 0);
}
This snippet code found here:
https://stackoverflow.com/a/33064140/2447726

Try this
import android.content.Context;
import android.graphics.Canvas;
import android.support.annotation.NonNull;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.SeekBar;
/**
* Implementation of an easy vertical SeekBar, based on the normal SeekBar.
*/
public class VerticalSeekBar extends SeekBar {
/**
* The angle by which the SeekBar view should be rotated.
*/
private static final int ROTATION_ANGLE = -90;
/**
* A change listener registrating start and stop of tracking. Need an own listener because the listener in SeekBar
* is private.
*/
private OnSeekBarChangeListener mOnSeekBarChangeListener;
/**
* Standard constructor to be implemented for all views.
*
* #param context The Context the view is running in, through which it can access the current theme, resources, etc.
* #see android.view.View#View(Context)
*/
public VerticalSeekBar(final Context context) {
super(context);
}
/**
* Standard constructor to be implemented for all views.
*
* #param context The Context the view is running in, through which it can access the current theme, resources, etc.
* #param attrs The attributes of the XML tag that is inflating the view.
* #see android.view.View#View(Context, AttributeSet)
*/
public VerticalSeekBar(final Context context, final AttributeSet attrs) {
super(context, attrs);
}
/**
* Standard constructor to be implemented for all views.
*
* #param context The Context the view is running in, through which it can access the current theme, resources, etc.
* #param attrs The attributes of the XML tag that is inflating the view.
* #param defStyle An attribute in the current theme that contains a reference to a style resource that supplies default
* values for the view. Can be 0 to not look for defaults.
* #see android.view.View#View(Context, AttributeSet, int)
*/
public VerticalSeekBar(final Context context, final AttributeSet attrs, final int defStyle) {
super(context, attrs, defStyle);
}
/*
* (non-Javadoc) ${see_to_overridden}
*/
#Override
protected final void onSizeChanged(final int width, final int height, final int oldWidth, final int oldHeight) {
super.onSizeChanged(height, width, oldHeight, oldWidth);
}
/*
* (non-Javadoc) ${see_to_overridden}
*/
#Override
protected final synchronized void onMeasure(final int widthMeasureSpec, final int heightMeasureSpec) {
super.onMeasure(heightMeasureSpec, widthMeasureSpec);
setMeasuredDimension(getMeasuredHeight(), getMeasuredWidth());
}
/*
* (non-Javadoc) ${see_to_overridden}
*/
#Override
protected final void onDraw(#NonNull final Canvas c) {
c.rotate(ROTATION_ANGLE);
c.translate(-getHeight(), 0);
super.onDraw(c);
}
/*
* (non-Javadoc) ${see_to_overridden}
*/
#Override
public final void setOnSeekBarChangeListener(final OnSeekBarChangeListener listener) {
// Do not use super for the listener, as this would not set the fromUser flag properly
mOnSeekBarChangeListener = listener;
}
/*
* (non-Javadoc) ${see_to_overridden}
*/
#Override
public final boolean onTouchEvent(#NonNull final MotionEvent event) {
if (!isEnabled()) {
return false;
}
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
setProgressInternally(getMax() - (int) (getMax() * event.getY() / getHeight()), true);
if (mOnSeekBarChangeListener != null) {
mOnSeekBarChangeListener.onStartTrackingTouch(this);
}
break;
case MotionEvent.ACTION_MOVE:
setProgressInternally(getMax() - (int) (getMax() * event.getY() / getHeight()), true);
break;
case MotionEvent.ACTION_UP:
setProgressInternally(getMax() - (int) (getMax() * event.getY() / getHeight()), true);
if (mOnSeekBarChangeListener != null) {
mOnSeekBarChangeListener.onStopTrackingTouch(this);
}
break;
case MotionEvent.ACTION_CANCEL:
if (mOnSeekBarChangeListener != null) {
mOnSeekBarChangeListener.onStopTrackingTouch(this);
}
break;
default:
break;
}
return true;
}
/**
* Set the progress by the user. (Unfortunately, Seekbar.setProgressInternally(int, boolean) is not accessible.)
*
* #param progress the progress.
* #param fromUser flag indicating if the change was done by the user.
*/
public final void setProgressInternally(final int progress, final boolean fromUser) {
if (progress != getProgress()) {
super.setProgress(progress);
if (mOnSeekBarChangeListener != null) {
mOnSeekBarChangeListener.onProgressChanged(this, progress, fromUser);
}
}
onSizeChanged(getWidth(), getHeight(), 0, 0);
}
/*
* (non-Javadoc) ${see_to_overridden}
*/
#Override
public final void setProgress(final int progress) {
setProgressInternally(progress, false);
}
}

Getting started
Add these lines to build.gradle.
dependencies {
compile 'com.h6ah4i.android.widget.verticalseekbar:verticalseekbar:0.7.2'
}
Usage
Java code
public class TestVerticalSeekbar extends AppCompatActivity {
private SeekBar volumeControl = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_test_vertical_seekbar);
volumeControl = (SeekBar) findViewById(R.id.mySeekBar);
volumeControl.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
int progressChanged = 0;
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
progressChanged = progress;
}
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
public void onStopTrackingTouch(SeekBar seekBar) {
Toast.makeText(getApplicationContext(), "seek bar progress:" + progressChanged,
Toast.LENGTH_SHORT).show();
}
});
}
}
Layout XML
<!-- This library requires pair of the VerticalSeekBar and VerticalSeekBarWrapper classes -->
<com.h6ah4i.android.widget.verticalseekbar.VerticalSeekBarWrapper
android:layout_width="wrap_content"
android:layout_height="150dp">
<com.h6ah4i.android.widget.verticalseekbar.VerticalSeekBar
android:id="#+id/mySeekBar"
android:layout_width="0dp"
android:layout_height="0dp"
android:max="100"
android:progress="0"
android:splitTrack="false"
app:seekBarRotation="CW90" /> <!-- Rotation: CW90 or CW270 -->
</com.h6ah4i.android.widget.verticalseekbar.VerticalSeekBarWrapper>
NOTE: android:splitTrack="false" is required for Android N+.

I tried in many different ways, but the one which worked for me was.
Use Seekbar inside FrameLayout
<FrameLayout
android:id="#+id/VolumeLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#id/MuteButton"
android:layout_below="#id/volumeText"
android:layout_centerInParent="true">
<SeekBar
android:id="#+id/volume"
android:layout_width="500dp"
android:layout_height="60dp"
android:layout_gravity="center"
android:progress="50"
android:secondaryProgress="40"
android:progressDrawable="#drawable/seekbar_volume"
android:secondaryProgressTint="#color/tint_neutral"
android:thumbTint="#color/tint_neutral"
/>
And in Code.
Setup Pre Draw callback on Seekbar, Where you can change the Width and height of the Seekbar
I did this part in c#, so Code i used was
var volumeSlider = view.FindViewById<SeekBar>(Resource.Id.home_link_volume);
var volumeFrameLayout = view.FindViewById<FrameLayout>(Resource.Id.linkVolumeFrameLayout);
void OnPreDrawVolume(object sender, ViewTreeObserver.PreDrawEventArgs e)
{
volumeSlider.ViewTreeObserver.PreDraw -= OnPreDrawVolume;
var h = volumeFrameLayout.Height;
volumeSlider.Rotation = 270.0f;
volumeSlider.LayoutParameters.Width = h;
volumeSlider.RequestLayout();
}
volumeSlider.ViewTreeObserver.PreDraw += OnPreDrawVolume;
Here i Add listener to PreDraw Event and when its triggered, I remove the PreDraw so that it doesnt go into Infinite loop.
So when Pre Draw gets executed, I fetch the Height of FrameLayout and assign it to Seekbar. And set the rotation of seekbar to 270.
As my seekbar is inside frame Layout and its Gravity is set as Center. I dont need to worry about the Translation. As Seekbar always stay in middle of Frame Layout.
Reason i remove EventHandler is because seekbar.RequestLayout(); Will make this event to be executed again.

You can do it by yourself - it's now so difficult.
Here is an example from my project: https://github.com/AlShevelev/WizardCamera
Let start from settings (attrs.xml).
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="ExpositionBar">
<attr name="button_icon" format="reference" />
<attr name="button_icon_size" format="dimension" />
<attr name="stroke_width" format="dimension" />
<attr name="stroke_color" format="color" />
<attr name="button_color" format="color" />
<attr name="button_color_pressed" format="color" />
<attr name="min_value" format="float" />
<attr name="max_value" format="float" />
</declare-styleable>
</resources>
Here is a couple of utility functions:
fun <T: Comparable<T>>T.fitInRange(range: Range<T>): T =
when {
this < range.lower -> range.lower
this > range.upper -> range.upper
else -> this
}
fun Float.reduceToRange(rangeFrom: Range<Float>, rangeTo: Range<Float>): Float =
when {
this == rangeFrom.lower -> rangeTo.lower
this == rangeFrom.upper -> rangeTo.upper
else -> {
val placeInRange = (this - rangeFrom.lower) / (rangeFrom.upper - rangeFrom.lower)
((rangeTo.upper - rangeTo.lower) * placeInRange) + rangeTo.lower
}
}
And at last, but not least - a class for vertical seek bar:
class ExpositionBar
#JvmOverloads
constructor(
context: Context,
attrs: AttributeSet? = null,
defStyleAttr: Int = 0
) : View(context, attrs, defStyleAttr) {
private val drawingRect = RectF(0f, 0f, 0f, 0f)
private val drawingPaint = Paint(Paint.ANTI_ALIAS_FLAG)
private val strokeWidth: Float
#ColorInt
private val strokeColor: Int
#ColorInt
private val buttonFillColor: Int
#ColorInt
private val buttonFillColorPressed: Int
private val icon: VectorDrawable
private val valuesRange: Range<Float>
private var centerX = 0f
private var minY = 0f
private var maxY = 0f
private var buttonCenterY = 0f
private var buttonRadiusExt = 0f
private var buttonRadiusInt = 0f
private var buttonMinY = 0f
private var buttonMaxY = 0f
private var buttonCenterBoundsRange = Range(0f, 0f)
private var iconTranslationX = 0f
private var iconTranslationY = 0f
private var isInDragMode = false
private var onValueChangeListener: ((Float) -> Unit)? = null
private var oldOutputValue = Float.MIN_VALUE
init {
val typedArray = context.obtainStyledAttributes(attrs, R.styleable.ExpositionBar)
icon = typedArray.getDrawable(R.styleable.ExpositionBar_button_icon) as VectorDrawable
val iconSize = typedArray.getDimensionPixelSize(R.styleable.ExpositionBar_button_icon_size, 0)
icon.setBounds(0, 0, iconSize, iconSize)
strokeWidth = typedArray.getDimensionPixelSize(R.styleable.ExpositionBar_stroke_width, 0).toFloat()
drawingPaint.strokeWidth = strokeWidth
strokeColor = typedArray.getColor(R.styleable.ExpositionBar_stroke_color, Color.WHITE)
buttonFillColor = typedArray.getColor(R.styleable.ExpositionBar_button_color, Color.BLACK)
buttonFillColorPressed = typedArray.getColor(R.styleable.ExpositionBar_button_color_pressed, Color.BLUE)
val minValue = typedArray.getFloat(R.styleable.ExpositionBar_min_value, 0f)
val maxValue = typedArray.getFloat(R.styleable.ExpositionBar_max_value, 0f)
valuesRange = Range(minValue, maxValue)
typedArray.recycle()
}
override fun onSizeChanged(w: Int, h: Int, oldw: Int, oldh: Int) {
super.onSizeChanged(w, h, oldw, oldh)
drawingRect.right = width.toFloat()
drawingRect.bottom = height.toFloat()
buttonCenterY = drawingRect.centerY()
recalculateDrawingValues()
}
override fun onDraw(canvas: Canvas) {
drawingPaint.color = strokeColor
drawingPaint.style = Paint.Style.STROKE
// Draw the center line
canvas.drawLine(centerX, minY, centerX, buttonMinY, drawingPaint)
canvas.drawLine(centerX, buttonMaxY, centerX, maxY, drawingPaint)
// Draw the button
canvas.drawCircle(centerX, buttonCenterY, buttonRadiusExt, drawingPaint)
drawingPaint.style = Paint.Style.FILL
drawingPaint.color = if(isInDragMode) buttonFillColorPressed else buttonFillColor
canvas.drawCircle(centerX, buttonCenterY, buttonRadiusInt, drawingPaint)
// Draw button icon
canvas.translate(iconTranslationX, iconTranslationY)
icon.draw(canvas)
canvas.translate(-iconTranslationX, -iconTranslationY)
}
#SuppressLint("ClickableViewAccessibility")
override fun onTouchEvent(event: MotionEvent): Boolean {
if(!isEnabled) {
return false
}
when(event.actionMasked) {
MotionEvent.ACTION_DOWN -> {
if(isButtonHit(event.y)){
isInDragMode = true
invalidate()
}
}
MotionEvent.ACTION_MOVE -> {
if(isInDragMode) {
buttonCenterY = event.y.fitInRange(buttonCenterBoundsRange)
recalculateDrawingValues()
invalidate()
val outputValue = buttonCenterY.reduceToRange(buttonCenterBoundsRange, valuesRange)
if (outputValue != oldOutputValue) {
onValueChangeListener?.invoke(outputValue)
oldOutputValue = outputValue
}
}
}
MotionEvent.ACTION_UP,
MotionEvent.ACTION_CANCEL -> {
isInDragMode = false
invalidate()
}
}
return true
}
fun setOnValueChangeListener(listener: ((Float) -> Unit)?) {
onValueChangeListener = listener
}
private fun recalculateDrawingValues() {
centerX = drawingRect.left + drawingRect.width()/2
minY = drawingRect.top
maxY = drawingRect.bottom
buttonRadiusExt = drawingRect.width() / 2 - strokeWidth / 2
buttonRadiusInt = buttonRadiusExt - strokeWidth / 2
buttonMinY = buttonCenterY - buttonRadiusExt
buttonMaxY = buttonCenterY + buttonRadiusExt
val buttonCenterMinY = minY + buttonRadiusExt + strokeWidth / 2
val buttonCenterMaxY = maxY - buttonRadiusExt - strokeWidth / 2
buttonCenterBoundsRange = Range(buttonCenterMinY, buttonCenterMaxY)
iconTranslationX = centerX - icon.bounds.width() / 2
iconTranslationY = buttonCenterY - icon.bounds.height() / 2
}
private fun isButtonHit(y: Float): Boolean {
return y >= buttonMinY && y <= buttonMaxY
}
}
You can use it as shown here:
<com.shevelev.wizard_camera.main_activity.view.widgets.ExpositionBar
android:id="#+id/expositionBar"
android:layout_width="#dimen/mainButtonSize"
android:layout_height="300dp"
android:layout_gravity="end|center_vertical"
android:layout_marginEnd="#dimen/marginNormal"
android:layout_marginBottom="26dp"
app:button_icon = "#drawable/ic_brightness"
app:button_icon_size = "#dimen/toolButtonIconSize"
app:stroke_width = "#dimen/strokeWidthNormal"
app:stroke_color = "#color/mainButtonsForeground"
app:button_color = "#color/mainButtonsBackground"
app:button_color_pressed = "#color/mainButtonsBackgroundPressed"
app:min_value="-100"
app:max_value="100"
/>
Voila!

Simple answer
Instead of using android:rotation="270" inside of a seek bar, use it inside of a FrameLayout that wraps around it.
<FrameLayout
android:background="#color/gray"
android:layout_width="300dp"
android:layout_height="5dp"
android:layout_marginEnd="-126dp"
android:rotation="270"
android:orientation="vertical"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent">
<SeekBar
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
</FrameLayout>
To get my frame layout to be 24dp margin right I calculated width -150dp + 24dp because the frame layout is first drawn horizontally and then rotated vertically.

In my case, I used an ordinary seekBar and just flipped out the layout.
seekbark_layout.xml - my layout that containts seekbar which we need to make vertical.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/rootView"
android:layout_width="match_parent"
android:layout_height="match_parent">
<SeekBar
android:id="#+id/seekBar"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_alignParentBottom="true"/>
</RelativeLayout>
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<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"
tools:context="com.vgfit.seekbarexample.MainActivity">
<View
android:id="#+id/headerView"
android:layout_width="match_parent"
android:layout_height="100dp"
android:background="#color/colorAccent"/>
<View
android:id="#+id/bottomView"
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_alignParentBottom="true"
android:background="#color/colorAccent"/>
<include
layout="#layout/seekbar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#id/bottomView"
android:layout_below="#id/headerView"/>
</RelativeLayout>
And in MainActivity I rotate seekbar_layout:
import android.os.Bundle
import android.support.v7.app.AppCompatActivity
import android.widget.RelativeLayout
import kotlinx.android.synthetic.main.seekbar_layout.*
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
rootView.post {
val w = rootView.width
val h = rootView.height
rootView.rotation = 270.0f
rootView.translationX = ((w - h) / 2).toFloat()
rootView.translationY = ((h - w) / 2).toFloat()
val lp = rootView.layoutParams as RelativeLayout.LayoutParams
lp.height = w
lp.width = h
rootView.requestLayout()
}
}
}
As a result we have necessary vertical seekbar:

By using RotateLayout, having vertical SeekBar is a breeze. Just wrap that horrible SeekBar into it and Bob is your uncle:
<com.github.rongi.rotate_layout.layout.RotateLayout
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:angle="-90"
>
<androidx.appcompat.widget.AppCompatSeekBar
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
</com.github.rongi.rotate_layout.layout.RotateLayout>
https://github.com/rongi/rotate-layout

Hidden Vertical SeekBar
In a simpler way, you can make a SeekBar like this.
Like the way to increase or decrease the volume in video players. All
three Last attributes can be manipulated in the SeekBar.
<LinearLayout
android:layout_width="#dimen/_40dp"
android:layout_height="wrap_content"
android:layout_marginVertical="100dp"
android:gravity="center"
android:orientation="vertical"
>
<SeekBar
android:layout_width="500dp"
android:layout_height="300dp"
android:layout_gravity="center"
android:rotation="270"
android:secondaryProgress="6"
android:progress="15"
android:progressDrawable="#null"
android:thumbTint="#null"
android:secondaryProgressTint="#null"
/>
</LinearLayout>

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

Android : Custom View not drawing - android

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