我有一個自定義視圖,並希望在該自定義視圖上添加一個自定義視圖。這是我的自定義視圖類:如何在另一個自定義視圖中添加自定義視圖?
public class CustomCircle extends View{
float radius;
Paint paint = new Paint();
String message = "";
public CustomCircle(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
canvas.drawCircle(getWidth()/2, getHeight()/2,radius, paint);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
boolean isClickInCircle = false;
float x = event.getX();
float y = event.getY();
double check = Math.sqrt((x-getWidth()/2)*(x-getWidth()/2) + (y-getHeight()/2)*(y-getHeight()/2));
if (check<=radius) {
isClickInCircle= true;
}
if (isClickInCircle) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
Toast.makeText(getContext(),message, Toast.LENGTH_LONG).show();
return true;
case MotionEvent.ACTION_UP:
Toast.makeText(getContext(), message, Toast.LENGTH_LONG).show();
return true;
default:
break;
}
}
return false;
}
和正在使用擴展LinearLayout
另一個類:
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
B root = new B(this);
root.addCircle();
setContentView(root);
}
:
public class B extends LinearLayout {
private Paint paint;
public B(Context context) {
super(context);
paint = new Paint();
paint.setColor(Color.WHITE);
paint.setStyle(Style.FILL);
}
public void addCircle() {
CustomCircle circleBlue = new CustomCircle(getContext(), null);
circleBlue.paint.setColor(Color.WHITE);
circleBlue.paint.setAntiAlias(true);
circleBlue.radius = 160;
circleBlue.message = "Clicked";
addView(circleBlue);
CustomCircle circleRed = new CustomCircle(getContext(), null);
circleRed.paint.setColor(Color.RED);
circleRed.paint.setAntiAlias(true);
circleRed.radius = 80;
circleRed.message = "Clicked";
addView(circleRed);
}
,我從主活動類使用調用B級
輸出只顯示一個圓圈,而不是另一個圓圈內的圓圈。我的代碼有什麼問題?
是我改變circleRed.paint.setColor(Color.BLACK);它仍然展示我一個圓圈。 –
比我會建議看@Luksprog回答 –
所以交換顏色。你現在看到什麼?如果您看到的圓圈的顏色也交換了,那麼您有兩個圓圈完全重疊。 – Simon