Üdv,

van 1 kis programom, amiben saját LinearLayout-ot használnék. Ebben kis dobozokat rajzolok zöld, vagy piros színnel. A probléma az, hogy az onDraw() metódus folyamatosan hívódik. A kérdés az, hogy miért és mi lehet a megoldás?

a hívó kód:

slotPanel = ( LinearLayoutOutlined )findViewById( R.id.llySlotPanel );

slotPanel.setDayBoundariesInMinutes( db, dw );

TimeSlot[] tSlots = nextDaysSlots.getGaps( dayOfWeek );
slotPanel.setItems( tSlots );
slotPanel.invalidate();

a LinearLayoutOutlined osztály:

package com.widgets;

public class LinearLayoutOutlined extends LinearLayout {

private int workingTimeBeginsInMinutes;
 private int workingTimeFinishesInMinutes;
 private TimeSlot[] items;
 private Rect outline;
 private Paint strokePaint = new Paint();
 SimpleDateFormat formatter;

public LinearLayoutOutlined( Context context ) {
 super( context );
 setWillNotDraw( false );
 }

public LinearLayoutOutlined( Context context, AttributeSet attrs ) {
 super( context, attrs );
 setWillNotDraw( false );
 }

public void setWorkingTimeBeginsInMinutes( int m ) {
 this.workingTimeBeginsInMinutes = m;
 }

public void setWorkingTimeFinishesInMinutes( int m ) {
 this.workingTimeFinishesInMinutes = m;
 }

public void setDayWidthInMinutes( int dayWidthInMinutes ) {
 this.workingTimeFinishesInMinutes = this.workingTimeBeginsInMinutes + dayWidthInMinutes;
 }

public void setDayBoundariesInMinutes( int daybeginInMinutes, int dayWidthInMinutes ) {
 setWorkingTimeBeginsInMinutes( daybeginInMinutes );
 setDayWidthInMinutes( dayWidthInMinutes );
 }

private int getWorkingTimeBeginsInMinutes() {
 return workingTimeBeginsInMinutes;
 }

public int getWorkingTimeFinishesInMinutes() {
 return workingTimeFinishesInMinutes;
 }

public void setItems( TimeSlot[] items ) {
 this.items = items;
 }

@SuppressLint("DrawAllocation")
 @Override
 protected void onDraw( Canvas canvas ) {
 if( items == null ) return;
 // time labels
 TextView tvFrom = ( TextView )findViewById( R.id.lblStartingTime ), tvTo = ( TextView )findViewById( R.id.lblFinishingTime );
 formatter = new SimpleDateFormat( "HH:mm", Locale.getDefault() );
 tvFrom.setText( formatter.format( new Date( getWorkingTimeBeginsInMinutes() * 60000L ) ) );
 tvTo.setText( formatter.format( new Date( getWorkingTimeFinishesInMinutes() * 60000L ) ) );
 
 strokePaint.setStyle( Paint.Style.STROKE );
 strokePaint.setStrokeWidth( 1 );
 strokePaint.setStyle( Style.FILL );
 outline = canvas.getClipBounds();
 Convert.setDayBoundaries( getWorkingTimeBeginsInMinutes(), getWorkingTimeFinishesInMinutes(), outline );
 
 for( TimeSlot slotItem: items ) {
    RectTouchable rect = Convert.ToRect( slotItem );
    if( slotItem.isFree() )
      strokePaint.setARGB( 255, 0, 255, 0 );
    else
      strokePaint.setARGB( 255, 255, 0, 0 );
    canvas.drawRect( rect.getRect(), strokePaint );
 }
 }
}

Segítségeteket előre is köszönöm.