1
我有一個自定義的RelativeLayout，我想在其中動態創建矩形。將自定義矩形添加到自定義RelativeLayout中
他們沒有顯示在我目前的代碼，但我不知道最新的原因。
自定義的RelativeLayout：
public class DrawView extends RelativeLayout {
public DrawView(Context context) {
super(context);
setFocusable(true);
this.addView(new Rectangle(this.getContext()));
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
}
定製矩形：
public class Rectangle extends View {
public Rectangle(Context context) {
super(context);
}
public Rectangle(Context context, AttributeSet attrs) {
super(context, attrs);
}
public Rectangle(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
Paint paint = new Paint();
paint.setColor(Color.WHITE);
canvas.drawRect(new Rect(), paint);
}
}
編輯： 的解決辦法是：
public class Rectangle extends View {
public Rectangle(Context context) {
super(context);
init();
}
public Rectangle(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public Rectangle(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
private void init() {
this.setBackgroundResource(R.drawable.rectangle);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int width = 150;
int height = 50;
setMeasuredDimension(width, height);
}
}
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<corners
android:radius="5sp"/>
<gradient
android:angle="315"
android:startColor="#FFFF6666"
android:endColor="#FFFF1111"
android:type="linear"
/>
</shape>