Develop Reference

How to display separators in Android SeekBar?

I have added a SeekBar to one of my fragments. Struggling to add white lines(divider) as shown in above SeekBar. Any clue ? Is there any property I can set for this?

Below is what I have done on a basic level. You will need to make it dynamic to taste:
public class SegmentedSeekBar extends android.support.v7.widget.AppCompatSeekBar {
private Paint progressPaint;
public SegmentedSeekBar(Context context) {
super(context);
init();
}
public SegmentedSeekBar(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public SegmentedSeekBar(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init();
}
private void init() {
progressPaint = new Paint();
progressPaint.setStyle(Paint.Style.FILL_AND_STROKE);
progressPaint.setColor(Color.LTGRAY);
progressPaint.setStrokeWidth(2.0f);
}
#Override
protected synchronized void onDraw(Canvas canvas) {
int halfHeight = getHeight() / 2;
int pos;
float smallH = 10;
float div = (getWidth() - getPaddingRight() - getPaddingLeft()) / (getMax());
for (int i = 1; i < getMax(); i++) {
pos = (int) (div * i) + getPaddingLeft();
canvas.drawLine(
pos + 1.0f,
halfHeight - (halfHeight / 2.0f),
pos + 1.0f,
halfHeight + (halfHeight / 2.0f),
progressPaint);
}
super.onDraw(canvas);
}
}

Best way to done your requirement is add empty view(3 View) over seek bar. create view with match_parent height , 2dp width over seek-bar.
For more info see the link Seek bar with divider

Add horizontal line inside EditText

I have created one EditText programatically when I type in EditText if the text goes to next line then I want to draw horizontal line inside EditText. How can I achieve it ?

As per the Raghunandan comment, You can use this class in your project
LinedEditText.java
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.widget.EditText;
public class LinedEditText extends EditText {
private Paint mPaint = new Paint();
public LinedEditText(Context context) {
super(context);
initPaint();
}
public LinedEditText(Context context, AttributeSet attrs) {
super(context, attrs);
initPaint();
}
public LinedEditText(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
initPaint();
}
private void initPaint() {
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setColor(0x80000000);
}
#Override protected void onDraw(Canvas canvas) {
int left = getLeft();
int right = getRight();
int paddingTop = getPaddingTop();
int paddingBottom = getPaddingBottom();
int paddingLeft = getPaddingLeft();
int paddingRight = getPaddingRight();
int height = getHeight();
int lineHeight = getLineHeight();
int count = (height-paddingTop-paddingBottom) / lineHeight;
for (int i = 0; i < count; i++) {
int baseline = lineHeight * (i+1) + paddingTop;
canvas.drawLine(left+paddingLeft, baseline, right-paddingRight, baseline, mPaint);
}
super.onDraw(canvas);
}
}
use it in layout file
<yourpackagename.LinedEditText
android:id="#+id/editText2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:background="#android:color/transparent"
android:ems="10"
android:gravity="top"
android:hint="#string/note_body"
android:inputType="textMultiLine"
android:lineSpacingExtra="4dp"
android:textColor="#000000"
android:textColorHint="#e2e2e2" />

How to set SquareTextView TypeFace

I'm trying to set custom typeface for map markers' cluster icon using SquareTextView, what is a class of android-maps-utils-amap library extending TextView. In DefaultClusterRenderer I'm using this code to set custom typeface but no effect. So please help me to understand what I need to do to change the typeface of SquareTextView
private SquareTextView makeSquareTextView(Context context) {
SquareTextView squareTextView = new SquareTextView(context);
Typeface typeface = Typeface.createFromAsset(context.getAssets(), "whatever.ttf");
squareTextView.setTypeface(typeface);
}
And this is the source code of SquareTextView:
package com.amap.api.maps2d.ui;
import android.content.Context;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.widget.TextView;
public class SquareTextView extends TextView {
private int mOffsetTop = 0;
private int mOffsetLeft = 0;
public SquareTextView(Context context) {
super(context);
}
public SquareTextView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public SquareTextView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int width = getMeasuredWidth();
int height = getMeasuredHeight();
int dimension = Math.max(width, height);
if (width > height) {
mOffsetTop = width - height;
mOffsetLeft = 0;
} else {
mOffsetTop = 0;
mOffsetLeft = height - width;
}
setMeasuredDimension(dimension, dimension);
}
#Override
public void draw(Canvas canvas) {
canvas.translate(mOffsetLeft / 2, mOffsetTop / 2);
super.draw(canvas);
}
}

I have my own implementation for TextView and I use it for setting typeface like the following, and it worked for me:
public class MyNewTextView extends TextView {
private int mOffsetTop = 0;
private int mOffsetLeft = 0;
public MyNewTextView(Context context) {
super(context);
}
public MyNewTextView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public MyNewTextView(Context context, AttributeSet attrs) {
super(context, attrs);
}
#Override
public void setTypeface(Typeface tf, int style) {
super.setTypeface(Typeface.createFromAsset(getContext().getAssets(), "fonts/whatever.ttf"), style);
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int width = getMeasuredWidth();
int height = getMeasuredHeight();
int dimension = Math.max(width, height);
if (width > height) {
mOffsetTop = width - height;
mOffsetLeft = 0;
} else {
mOffsetTop = 0;
mOffsetLeft = height - width;
}
setMeasuredDimension(dimension, dimension);
}
#Override
public void draw(Canvas canvas) {
canvas.translate(mOffsetLeft / 2, mOffsetTop / 2);
super.draw(canvas);
}
}
So try to override setTypeface() for SquareTextView

Make your own implementation of SquareTextView Try this:
public class MySquareTextView extends SquareTextView {
public MySquareTextView (Context context) {
super(context);
setTypeface();
}
public MySquareTextView (Context context, AttributeSet attrs) {
super(context, attrs);
setTypeface();
}
public MySquareTextView (Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
setTypeface();
}
public void setTypeface(){
setTypeface(Typeface.createFromAsset(getAssets(), "Roboto-Italic.ttf"));
}
}

Android: Custom circle ProgressBar with spaces in between

I am trying to create a custom view that has a Circle and in it, I have to have sections in run time as shown in the image below. I tried a lot of stuff in onDraw method but got no luck. I even tried https://github.com/donvigo/CustomProgressControls . Basically, I want to give a number of sections and then in each section I can select colors as per my need.
I am looking for ProgressBar that should have gap/space as shown in the image; in between circles. Say if I have given 5 sections, 3 of which should be "full", it should color the first 3 in red, and the other 2 in green, for example.
To draw I am doing like:
private void initExternalCirclePainter() {
internalCirclePaint = new Paint();
internalCirclePaint.setAntiAlias(true);
internalCirclePaint.setStrokeWidth(internalStrokeWidth);
internalCirclePaint.setColor(color);
internalCirclePaint.setStyle(Paint.Style.STROKE);
internalCirclePaint.setPathEffect(new DashPathEffect(new float[]{dashWith, dashSpace}, dashSpace));
}

I might be a little late to the party, but I actually wrote a custom component that has 2 rings that look quite similar to what you're trying to achieve. You can just remove the outer ring easily. The image of what I got in the end:
Here's the class:
public class RoundedSectionProgressBar extends View {
// The amount of degrees that we wanna reserve for the divider between 2 sections
private static final float DIVIDER_ANGLE = 7;
public static final float DEGREES_IN_CIRCLE = 360;
public static final int PADDING = 18;
public static final int PADDING2 = 12;
protected final Paint paint = new Paint();
protected final Paint waitingPaint = new Paint();
protected final Paint backgroundPaint = new Paint();
private int totalSections = 5;
private int fullSections = 2;
private int waiting = 3; // The outer ring. You can omit this
private RectF rect = new RectF();
public RoundedSectionProgressBar(Context context) {
super(context);
init(context, null);
}
public RoundedSectionProgressBar(Context context, #Nullable AttributeSet attrs) {
super(context, attrs);
init(context, attrs);
}
public RoundedSectionProgressBar(Context context, #Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context, attrs);
}
private void init(Context context, AttributeSet attrs) {
// Can come from attrs if need be?
int strokeWidth = 3;
setupPaint(context, strokeWidth, paint, R.color.filled_color_inner_ring);
setupPaint(context, strokeWidth, waitingPaint, R.color.empty_color_inner_ring);
setupPaint(context, strokeWidth, backgroundPaint, R.color.filled_color_outer_ring);
}
private void setupPaint(Context context, int strokeWidth, Paint backgroundPaint, int colorRes) {
backgroundPaint.setStrokeCap(Paint.Cap.SQUARE);
backgroundPaint.setColor(context.getResources().getColor(colorRes));
backgroundPaint.setAntiAlias(true);
backgroundPaint.setStrokeWidth(strokeWidth);
backgroundPaint.setStyle(Paint.Style.STROKE);
}
public int getTotalSections() {
return totalSections;
}
public void setTotalSections(int totalSections) {
this.totalSections = totalSections;
invalidate();
}
public int getFullSections() {
return fullSections;
}
public void setNumberOfSections(int fullSections, int totalSections, int waiting) {
this.fullSections = fullSections;
this.totalSections = totalSections;
this.waiting = waiting;
invalidate();
}
#Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
rect.set(getLeft() + PADDING, getTop() + PADDING, getRight() - PADDING, getBottom() - PADDING);
float angleOfSection = (DEGREES_IN_CIRCLE / totalSections) - DIVIDER_ANGLE;
// Drawing the inner ring
for (int i = 0; i < totalSections; i++) {
// -90 because it doesn't start at the top, so rotate by -90
// divider_angle/2 especially in 2 sections, it's visibly rotated by Divider angle, so we split this between last and first
float startAngle = -90 + i * (angleOfSection + DIVIDER_ANGLE) + DIVIDER_ANGLE / 2;
if (i < fullSections) {
canvas.drawArc(rect, startAngle, angleOfSection, false, paint);
} else {
canvas.drawArc(rect, startAngle, angleOfSection, false, backgroundPaint);
}
}
// Drawing the outer ring
rect.set(getLeft() + PADDING2, getTop() + PADDING2, getRight() - PADDING2, getBottom() - PADDING2);
for (int i = 0; i < waiting; i++) {
float startAngle = -90 + i * (angleOfSection + DIVIDER_ANGLE) + DIVIDER_ANGLE / 2;
canvas.drawArc(rect, startAngle, angleOfSection, false, waitingPaint);
}
}
}
Notice that this code won't give you the outer ring's 'empty' slots, since we decided against them in the end. The inner circle will have both the empty and filled slots. The whole class can be reused, and it's responsible just for the 2 rings that are drawn, the 6/6, +3 and the red circle are parts of another view.
The most important piece of the code is the onDraw method. It contains the logic for drawing the arcs in the for loop, as well as the logic for calculating the angles and adding spaces between them. Everything is rotated by -90 degrees, because I needed it to start at the top, rather than on the right, as it is the 0-degree angle in Android. It's not that complex, and you can modify it to fit your needs better should you need to.

I find it easier to do math for drawArc(operating on angle values based on number of sections) rather than computing the arc length.
Here's a quick idea, with a lot of hard-coded properties, but you should be able to get the idea:
public class MyStrokeCircleView extends View {
private Paint mPaint;
private RectF mRect;
private int mPadding;
private int mSections;
private int mFullArcSliceLength;
private int mColorArcLineLength;
private int mArcSectionGap;
public MyStrokeCircleView(Context context) {
super(context);
init(null, 0);
}
public MyStrokeCircleView(Context context, AttributeSet attrs) {
super(context, attrs);
init(attrs, 0);
}
public MyStrokeCircleView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init(attrs, defStyle);
}
private void init(AttributeSet attrs, int defStyle) {
mPaint = new Paint();
mPaint.setFlags(Paint.ANTI_ALIAS_FLAG);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeWidth(10);
mPaint.setColor(ContextCompat.getColor(getContext(), android.R.color.darker_gray));
mPadding = 5;
mRect = new RectF(mPadding, mPadding, mPadding, mPadding);
mSections = 4;
mFullArcSliceLength = 360 / mSections;
mArcSectionGap = mFullArcSliceLength / 10;
mColorArcLineLength = mFullArcSliceLength - 2 * mArcSectionGap;
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
mRect.right = getWidth() - mPadding;
mRect.bottom = getHeight() - mPadding;
}
#Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
for (int i = 0; i < mSections; i++) {
canvas.drawArc(mRect, i * mFullArcSliceLength + mArcSectionGap, mColorArcLineLength, false, mPaint);
}
}
}

Prevent ImageView redraw state after hide keyboard

First, I have a view like this:
When user press some text in edittext, I try to draw some rectangles in ImageView with specific coordinates. The problem is when the soft keyboard is hidden, all draw state of Imageview display wrong coordinates, look like it invalidated the imageview. I wonder is there any way to stop this.
Here is my Custom Drawable Imageview:
public class DrawableImageView extends ImageView {
private Paint ptBlur;
private List<Rect> rects;
private int originWidth;
private int originHeight;
public DrawableImageView(Context context) {
super(context);
initPaint();
}
public DrawableImageView(Context context, AttributeSet attrs) {
super(context, attrs);
initPaint();
}
public DrawableImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
initPaint();
}
public void setRects(List<Rect> rects, int originWidth, int originHeight) {
this.originHeight = originHeight;
this.originWidth = originWidth;
this.rects = rects;
invalidate();
}
private void initPaint() {
ptBlur = new Paint();
ptBlur.setColor(Color.YELLOW);
ptBlur.setStyle(Paint.Style.STROKE);
ptBlur.setStrokeWidth(5);
}
#Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (rects != null) {
int width = getWidth();
int height = getHeight();
for (Rect rect : rects) {
rect.bottom = Math.round(height * rect.bottom / originHeight);
rect.left = Math.round(width * rect.left / originWidth);
rect.right = Math.round(width * rect.right / originWidth);
rect.top = Math.round(height * rect.top / originHeight);
canvas.drawRect(rect, ptBlur);
}
}
}
}
The OnEditorActionListener for EditText:
// get the rectangles and draw
List<Rect> rects = DataUtil.getHighlightRectList(searchText);
drawableImageView.setRects(rects, pageWidth, pageHeight);