Develop Reference

Lined EditText bottom lines disappears

I am using Lined EditText to show vertical lines in an android app like notepad. When I add data it is displayed successfully but as data grows bottom lines disappear.
Any help will be appreciated.
Code:
public class LinedEditText extends AppCompatEditText {
private Rect mRect;
private Paint mPaint;
public LinedEditText(Context context, AttributeSet attrs) {
super(context, attrs);
mRect = new Rect();
mPaint = new Paint();
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setColor(0xFF000000);
}
/**
* This is called to draw the LinedEditText object
*
* #param canvas The canvas on which the background is drawn.
*/
#Override
protected void onDraw(Canvas canvas) {
int height = canvas.getHeight();
int curHeight = 0;
Rect r = mRect;
Paint paint = mPaint;
int baseline = getLineBounds(0, r);
for (curHeight = baseline + 1; curHeight < height;
curHeight += getLineHeight()) {
canvas.drawLine(r.left, curHeight, r.right, curHeight, paint);
}
super.onDraw(canvas);
}
}
layout_file.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">
<com.g26app.LinedEditText
android:id="#+id/note"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/transparent"
android:gravity="top"
android:textSize="22sp" />
</LinearLayout>

This is the code you need based on max4ever
#Override
protected void onDraw(Canvas canvas) {
int height = getHeight();
int line_height = getLineHeight();
int count = height / line_height;
if (getLineCount() > count)
count = getLineCount();//for long text with scrolling
Rect r = mRect;
Paint paint = mPaint;
int baseline = getLineBounds(0, r);//first line
for (int i = 0; i < count; i++) {
canvas.drawLine(r.left, baseline + 1, r.right, baseline + 1, paint);
baseline += getLineHeight();//next line
}
super.onDraw(canvas);
}

I updated onDraw of LinedEditText and it is working fine:
public void onDraw(Canvas canvas) {
int height = getHeight() / getLineHeight();
if (getLineCount() > height) {
height = getLineCount();
}
Rect rect = this.mRect;
Paint paint = this.mPaint;
int lineBounds = getLineBounds(0, rect);
for (int i = 0; i < height; i++) {
float f = (float) (lineBounds + 1);
canvas.drawLine((float) rect.left, f, (float) rect.right, f, paint);
lineBounds += getLineHeight();
}
super.onDraw(canvas);
}

How to exactly do Read More in an Android TextView?

Question: How to fade out the end of the last line and append Read More text in a TextView?
See:
Like in this post, I want to append read more text when description is about end and also you can notice that some text are blurry, invisible. I want all those.
I tried some answer, but that are different.
I want like this and at the end I want to append "Read More":
And I know there is answer in this question:
How to fade out the end of the last line in a TextView?
But that answer is not working for me.
My purpose is to not expand the texview while clicking on Read More, but instead I'll open new activity.

There was some problems this answer. I changed it a little bit as like this:
public class FadingTextView extends android.support.v7.widget.AppCompatTextView {
private static final double FADE_LENGTH_FACTOR = 1.5;
private final Shader shader;
private final Matrix matrix;
private final Paint paint;
private final Rect bounds;
public FadingTextView(Context context) {
this(context, null);
}
public FadingTextView(Context context, AttributeSet attrs) {
this(context, attrs, android.R.attr.textViewStyle);
}
public FadingTextView(Context context, AttributeSet attrs, int defStyleAttribute) {
super(context, attrs, defStyleAttribute);
matrix = new Matrix();
paint = new Paint();
bounds = new Rect();
shader = new LinearGradient(0f, 0f, 1f, 0f, 0, 0xFF000000, Shader.TileMode.CLAMP);
paint.setShader(shader);
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT));
}
#Override
protected void onDraw(Canvas canvas) {
// Locals
final Matrix m = matrix;
final Rect b = bounds;
final Layout l = getLayout();
// Last line index
final int line = getLineCount() - 1;
// Determine text direction
final boolean isRtl = l.getParagraphDirection(line) == Layout.DIR_RIGHT_TO_LEFT;
// Last line bounds
getLineBounds(line, b);
// Adjust end bound to text length
final int lineStart = l.getLineStart(line);
final int lineEnd = l.getLineEnd(line);
final CharSequence text = getText().subSequence(lineStart, lineEnd);
final int measure = (int) (getPaint().measureText(text, 0, text.length()) + .5f);
final int fadeLength = (int) (b.width() / FADE_LENGTH_FACTOR);
// Save the layer
final int saveCount = canvas.saveLayer(b.left, 0, b.right,
b.bottom, null,
Canvas.ALL_SAVE_FLAG);
// Let TextView draw itself
super.onDraw(canvas);
// Adjust and set the Shader Matrix
m.reset();
m.setScale(fadeLength, 1f);
if (isRtl) {
m.postRotate(180f, fadeLength / 2f, 0f);
}
m.postTranslate(b.left, 0f);
shader.setLocalMatrix(matrix);
// Finally draw the fade
canvas.drawRect(b, paint);
canvas.restoreToCount(saveCount);
}
}
TextView
<com.example.FadingTextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#e2f3eb"
android:ellipsize="end"
android:maxLines="3"
android:text="Lorem ipsum dolor....."
android:textColor="#0b8043" />
Read More:
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignEnd="#+id/post_desc"
android:layout_alignBottom="#+id/post_desc"
android:layout_marginEnd="0dp"
android:layout_marginBottom="0dp"
android:background="#android:color/transparent"
android:text="Read More"/>
FADE_LENGTH_FACTOR = 1
FADE_LENGTH_FACTOR = 1.5

Draw Curved Text on Canvas with different length of Text in android

I need to implement curved text which draw text on circular path on canvas.
It does draw circular path using
canvas.drawTextOnPath(QUOTE, circle, 485, 20, tPaint);
but it is not working for different length of the text.
Following is my Class to draw circular text on the canavs.
public class CircularTextVie extends View {
private String QUOTE = "";
private Path circle;
private Paint cPaint;
private Paint tPaint;
public CircularTextVie(Context context) {
super(context);
circle = new Path();
cPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
cPaint.setStyle(Paint.Style.STROKE);
cPaint.setColor(Color.LTGRAY);
cPaint.setStrokeWidth(3);
tPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
tPaint.setStyle(Paint.Style.FILL_AND_STROKE);
tPaint.setColor(Color.BLACK);
}
#Override
protected void onDraw(Canvas canvas) {
canvas.restore();
int xPos = (canvas.getWidth() /3);
int yPos = (int) ((canvas.getHeight() / 3) - ((tPaint.descent() + tPaint.ascent()) / 3)) ;
circle.addCircle(xPos, yPos, 150, Path.Direction.CW);
canvas.drawTextOnPath(QUOTE, circle, 485, 20, tPaint);
QUOTE="";
}
public void SetText(String text) {
this.QUOTE = text;
}
public void SetTypeFace(Typeface face) {
cPaint.setTypeface(face);
tPaint.setTypeface(face);
}
public void SetColor(int color) {
cPaint.setColor(color);
tPaint.setColor(color);
}
}
Thanks.

This can be done by varying the x and y positions based on textwidth
Define variables
private Rect textBounds;
private int mTextWidth, mTextHeight,centerX,centerY;
Add the below in the constructor of customview
textBounds = new Rect();
tPaint.getTextBounds(QUOTE, 0, QUOTE.length(), textBounds);
mTextWidth = Math.round(tPaint.measureText(QUOTE.toString())); // Use measureText to calculate width
mTextHeight = textBounds.height(); // Use height from getTextBounds()
Then in onDraw
canvas.drawCircle(centerX,centerY,150,mCirlcePaint);
circle.addCircle(centerX, centerY, 150, Path.Direction.CW);
// Note the 0 that's y offset. textdraw at circumference of the circle. Changing y you probably need to change the radius as well i guess.
canvas.drawTextOnPath(QUOTE, circle, (centerX)-(mTextWidth / 2f), 0, tPaint);
centerX,centerY are the center of the circle ie canvaswidht/2 and canvasHeight/2. I drew a circle for reference
The results for hello
The result for a bigger text
For numbers
Edit: To the question in comment
The math involved is in calculating the semi circle using text length
radius = (float) ((mTextWidth) / (Math.PI)). If text length is greater than your canvas you need to reduce the text size or use the full circle radius = (float) ((mTextWidth) / (2*(Math.PI))). Few other edge case you can consider to draw the text properly.
public class GraphicsView extends View {
private String QUOTE = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
private Path circle;
private Paint mCirlcePaint;
private Paint tPaint;
private Rect textBounds;
private int mTextWidth, mTextHeight, centerX, centerY;
private float radius;
public GraphicsView(Context context) {
super(context);
circle = new Path();
tPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
tPaint.setStyle(Paint.Style.FILL_AND_STROKE);
tPaint.setColor(Color.BLACK);
tPaint.setTextSize(100f);
textBounds = new Rect();
tPaint.getTextBounds(QUOTE, 0, QUOTE.length(), textBounds);
mTextWidth = Math.round(tPaint.measureText(QUOTE.toString())); // Use measureText to calculate width
mTextHeight = textBounds.height(); // Use height from getTextBounds()
mCirlcePaint = new Paint();
mCirlcePaint.setStyle(Paint.Style.FILL);
mCirlcePaint.setColor(Color.GREEN);
radius = (float) ((mTextWidth) / (Math.PI));
}
#Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
centerX = w / 2;
centerY = h / 2;
}
#Override
protected void onDraw(Canvas canvas) {
canvas.rotate(180, getWidth() / 2, getHeight() / 2);
canvas.drawCircle(centerX, centerY, radius, mCirlcePaint);
circle.addCircle(centerX, centerY, radius, Path.Direction.CW);
canvas.drawTextOnPath(QUOTE, circle, 0, 0, tPaint);
}
}

Animate canvas.drawCircle

How can I make move in coordinates Y, a canvas.drawCircle?
I want to make the sensation like the circle fall where I touch on the screen but I don't know how to animate it.
My onDraw:
public void onDraw(Canvas canvas) {
super.onDraw(canvas);
int x = getWidth();
int y = getHeight();
anchoX = x;
anchoY = y;
Paint paint = new Paint();
paint.setStyle(Paint.Style.FILL);
paint.setColor(Color.BLUE);
canvas.drawPaint(paint);
/*Texto*/
paint.setColor(Color.BLACK);
paint.setTextSize(80);
canvas.drawText("CONECTA 4", 70, 130, paint);
/*Separador*/
paint.setColor(Color.parseColor("#5C5C5C"));
canvas.drawRect(0, 200, 600, 210, paint);
/*Tablero*/
int radius = 25;
for (int i = 0; i < Game.NFILAS; i++)
for (int j = 0; j < Game.NCOLUMNAS; j++){
if (game.estaVacio(i,j)){
color = Color.WHITE;
paint.setColor(color);
canvas.drawCircle(getPixelFromColumna(j), getPixelFromFila(i), radius, paint);
} else if (game.estaJugador(i,j)){
paint.setColor(coloreado);
canvas.drawCircle(getPixelFromColumna(j), getPixelFromFila(i), radius, paint);
} else {
color = Color.RED;
paint.setColor(color);
canvas.drawCircle(getPixelFromColumna(j),getPixelFromFila(i), radius, paint);
}
}
}

you can check this answer. This is what you were looking for draw a circle with animation
For creating the circle you can you java file like this
public class Circle extends View {
private static final int START_ANGLE_POINT = 90;
private final Paint paint;
private final RectF rect;
private float angle;
public Circle(Context context, AttributeSet attrs) {
super(context, attrs);
final int strokeWidth = 40;
paint = new Paint();
paint.setAntiAlias(true);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(strokeWidth);
//Circle color
paint.setColor(Color.RED);
//size 200x200 example
rect = new RectF(strokeWidth, strokeWidth, 200 + strokeWidth, 200 + strokeWidth);
//Initial Angle (optional, it can be zero)
angle = 120;
}
#Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
canvas.drawArc(rect, START_ANGLE_POINT, angle, false, paint);
}
public float getAngle() {
return angle;
}
public void setAngle(float angle) {
this.angle = angle;
}
}
and for creating animation
public class CircleAngleAnimation extends Animation {
private Circle circle;
private float oldAngle;
private float newAngle;
public CircleAngleAnimation(Circle circle, int newAngle) {
this.oldAngle = circle.getAngle();
this.newAngle = newAngle;
this.circle = circle;
}
#Override
protected void applyTransformation(float interpolatedTime, Transformation transformation) {
float angle = oldAngle + ((newAngle - oldAngle) * interpolatedTime);
circle.setAngle(angle);
circle.requestLayout();
}
}
and you can use like this in xml for defining
<com.package.Circle
android:id="#+id/circle"
android:layout_width="300dp"
android:layout_height="300dp" />
Animate you circle by using this sample code
Circle circle = (Circle) findViewById(R.id.circle);
CircleAngleAnimation animation = new CircleAngleAnimation(circle, 240);
animation.setDuration(1000);
circle.startAnimation(animation);

How do I create horizontal lines in multiline edittext on each line using xml? [duplicate]

I was taking a look at the notepad sample in the android SDK see here: http://developer.android.com/resources/samples/NotePad/src/com/example/android/notepad/NoteEditor.html
Thing is it only draws the current line the cursor is on e.g http://cdn2.staztic.com/screenshots/simple-notepad-app-al-1.jpg
But I'd like to display lines that fill up the screen e.g. http://www.itismyworld.info/wp-content/uploads/2010/03/AK-notebook.png
Any suggestions would be great. The relevent bit of code seems to be here:
protected void onDraw(Canvas canvas) {
// Gets the number of lines of text in the View.
int count = getLineCount();
// Gets the global Rect and Paint objects
Rect r = mRect;
Paint paint = mPaint;
/*
* Draws one line in the rectangle for every line of text in the EditText
*/
for (int i = 0; i < count; i++) {
// Gets the baseline coordinates for the current line of text
int baseline = getLineBounds(i, r);
/*
* Draws a line in the background from the left of the rectangle to the right,
* at a vertical position one dip below the baseline, using the "paint" object
* for details.
*/
canvas.drawLine(r.left, baseline + 1, r.right, baseline + 1, paint);
}
// Finishes up by calling the parent method
super.onDraw(canvas);
}

This is the code, based on jkhouws1's suggestion and google's note editor
public class LinedEditText extends EditText {
private Rect mRect;
private Paint mPaint;
// we need this constructor for LayoutInflater
public LinedEditText(Context context, AttributeSet attrs) {
super(context, attrs);
mRect = new Rect();
mPaint = new Paint();
mPaint.setStyle(Paint.Style.FILL_AND_STROKE);
mPaint.setColor(R.color.edit_note_line); //SET YOUR OWN COLOR HERE
}
#Override
protected void onDraw(Canvas canvas) {
//int count = getLineCount();
int height = getHeight();
int line_height = getLineHeight();
int count = height / line_height;
if (getLineCount() > count)
count = getLineCount();//for long text with scrolling
Rect r = mRect;
Paint paint = mPaint;
int baseline = getLineBounds(0, r);//first line
for (int i = 0; i < count; i++) {
canvas.drawLine(r.left, baseline + 1, r.right, baseline + 1, paint);
baseline += getLineHeight();//next line
}
super.onDraw(canvas);
}
}
In Eclipse IDE press Ctrl+Shift+O to add all needed imports

I think this is what you need:
public class LinedEditText extends EditText {
private static Paint linePaint;
static {
linePaint = new Paint();
linePaint.setColor(Color.BLACK);
linePaint.setStyle(Style.STROKE);
}
public LinedEditText(Context context, AttributeSet attributes) {
super(context, attributes);
}
#Override
protected void onDraw(Canvas canvas) {
Rect bounds = new Rect();
int firstLineY = getLineBounds(0, bounds);
int lineHeight = getLineHeight();
int totalLines = Math.max(getLineCount(), getHeight() / lineHeight);
for (int i = 0; i < totalLines; i++) {
int lineY = firstLineY + i * lineHeight;
canvas.drawLine(bounds.left, lineY, bounds.right, lineY, linePaint);
}
super.onDraw(canvas);
}
}

maybe after that for loop, you draw estimated* additional lines.
getHeight() will return EditText's height in pixels
getLineHeight() will height of one standard line
so getHeight/getlineHeight-getCount will be number of lines left to draw.
you can't use getLineBounds, using the above functions you could calculate the position of the remaining lines to draw.
*Estimated since formatting of text could change the line height, but since there is no text in these lines yet that shouldnt be an issue. But for that same reason you should only draw the remaining lines, and not use this to draw all the lines.

<com.example.goh2.pronoornotepad.LinedEditText
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ffffcc4b"
android:gravity="top|left"
android:singleLine="false"
android:text=""
/>
The above XML works with the code from Max4ever's answer:
public class LinedEditText extends EditText {
private Rect mRect;
private Paint mPaint;
// we need this constructor for LayoutInflater
public LinedEditText(Context context, AttributeSet attrs) {
super(context, attrs);
mRect = new Rect();
mPaint = new Paint();
mPaint.setStyle(Paint.Style.FILL_AND_STROKE);
mPaint.setColor(R.color.edit_note_line); //SET YOUR OWN COLOR HERE
}
#Override
protected void onDraw(Canvas canvas) {
//int count = getLineCount();
int height = getHeight();
int line_height = getLineHeight();
int count = height / line_height;
if (getLineCount() > count)
count = getLineCount();//for long text with scrolling
Rect r = mRect;
Paint paint = mPaint;
int baseline = getLineBounds(0, r);//first line
for (int i = 0; i < count; i++) {
canvas.drawLine(r.left, baseline + 1, r.right, baseline + 1, paint);
baseline += getLineHeight();//next line
}
super.onDraw(canvas);
}
}