I am trying to create a textarea with dotted lines in all lines, but when new lines are added, it's not aligning properly:
Code
class LinedEditText extends androidx.appcompat.widget.AppCompatEditText {
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.setPathEffect(new DashPathEffect(new float[] {10f,20f}, 0f));
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(paddingLeft, baseline, right-paddingRight, baseline, mPaint);
}
super.onDraw(canvas);
}
}
XML
<com.example.myapp.LinedEditText
android:id="@+id/editTextTextMultiLine2"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginStart="16dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="16dp"
android:backgroundTint="#FFFFFF"
android:layout_marginBottom="8dp"
android:textSize="24sp"
android:hint="Start typing your items..."
android:gravity="start|top"
android:inputType="textMultiLine"
app:layout_constraintBottom_toTopOf="@+id/button10"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/imageView12"
/>
In my other device with different screensize have no problem. How can i fix this issue.?And some old devices not showing the dotted line, and this not aligning issue is also present.
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