创建自定义视图类并运行时，logcat控制台显示错误。
指定的子项已有父项。你必须在孩子的父亲身上调用removeView（）first.at android.view.ViewGroup.addViewInner（ViewGroup.java:4312）
怎么能解决这个问题呢？
这是我的代码：
public class CanvasView extends View {
ArrayList<Item> alTemp;
ArrayList<Item> alViews;
Bitmap bitmap2;
Bitmap bitmap;
int frontBack;
Context mContext;
Templates mTemplates;
RelativeLayout root;
float scale;
public CanvasView(Context context, float scale, ArrayList<Item> arrayList, Templates templates, int frontBack, Bitmap bitmap, Bitmap bitmap2) {
super(context);
this.mContext = context;
this.scale = scale;
this.alTemp = arrayList;
this.mTemplates = templates;
this.frontBack = frontBack;
this.bitmap = bitmap;
this.bitmap2 = bitmap2;
setData();
}
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
root.measure(canvas.getWidth(), canvas.getHeight());
root.layout(0, 0, canvas.getWidth(), canvas.getHeight());
root.draw(canvas);
root.setLayerType(1, null);
}
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
root.measure(w, h);
root.layout(0, 0, w, h);
}
public void setData() {
alViews = new ArrayList<>();
for (int i = 0; i < alTemp.size(); i++) {
if (frontBack == alTemp.get(i).getFrontback()) {
alViews.add(alTemp.get(i));
}
}
root = new RelativeLayout(mContext);
root.setLayoutParams(new LayoutParams(Constants.saveWidth, Constants.saveHeight));
ImageView imageView = new ImageView(mContext);
imageView.setLayoutParams(new LayoutParams(Constants.saveWidth, Constants.saveHeight));
imageView.setScaleType(ScaleType.FIT_XY);
if (frontBack == 0) {
if (mTemplates.getFrontTemplatetype() == 2) {
imageView.setImageBitmap(bitmap);
} else {
imageView.setImageBitmap(Functions.setFrontTemplate(mContext, mTemplates, Constants.saveWidth, Constants.saveHeight));
}
} else if (mTemplates.getBackTemplatetype() == 2) {
imageView.setImageBitmap(bitmap2);
} else {
imageView.setImageBitmap(Functions.setBackTemplate(mContext, mTemplates, Constants.saveWidth, Constants.saveHeight));
}
root.addView(imageView);
RelativeLayout relativeLayout = new RelativeLayout(mContext);
relativeLayout.setLayoutParams(new LayoutParams(Constants.saveWidth, Constants.saveWidth));
root.addView(relativeLayout);
for (int i = 0; i < alViews.size(); i++) {
System.out.println("loop " + i);
RelativeLayout relLayout = new RelativeLayout(mContext);
ViewGroup.LayoutParams layoutParams = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
relLayout.setX((float) Math.round(alViews.get(i).getRlx() * scale));
relLayout.setY((float) Math.round(alViews.get(i).getRly() * scale));
relLayout.setRotation(alViews.get(i).getRlrotation());
relLayout.setLayoutParams(layoutParams);
if (alViews.get(i).getType() == 0) {
CustomTextView customTextView = new CustomTextView(mContext);
String stringBuilder = " " +
alViews.get(i).getText().trim() +
" ";
customTextView.setText(stringBuilder);
customTextView.setTextColor((alViews.get(i)).getTextcolor());
customTextView.setTextSize(0, (float) Math.round(((float) alViews.get(i).getTextsize()) * scale));
customTextView.setGravity(alViews.get(i).getGravity());
customTextView.setTypeface(alViews.get(i).getTextstyle());
customTextView.setAlpha(((float) alViews.get(i).getOpacity()) / 100.0f);
if (alViews.get(i).isTextunderline()) {
customTextView.setPaintFlags(customTextView.getPaintFlags() | 8);
} else {
customTextView.setPaintFlags(customTextView.getPaintFlags() & -9);
}
if (alViews.get(i).isStroke()) {
customTextView.setStroke(true);
customTextView.setStrokeColor(alViews.get(i).getStrokeColor());
customTextView.setStrokeWidth(Math.round(((float) alViews.get(i).getStrokeWidth()) * scale));
customTextView.invalidate();
}
if (alViews.get(i).isShadow()) {
customTextView.setShadow(true);
customTextView.setShadowWidth(Math.round(alViews.get(i).getShadowSize() * scale));
customTextView.setShadowX(Math.round(alViews.get(i).getShadowX() * scale));
customTextView.setShadowY(Math.round(alViews.get(i).getShadowY() * scale));
customTextView.setShadowColor(alViews.get(i).getShadowColor());
customTextView.invalidate();
}
customTextView.setPadding(0, 0, (int) customTextView.getShadowX(), (int) customTextView.getShadowY());
customTextView.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
relativeLayout.setClipToPadding(true);
relativeLayout.addView(customTextView);
} else if (alViews.get(i).getType() == 1 ||alViews.get(i).getType()==2) {
imageView = new ImageView(mContext);
imageView.setImageBitmap(alViews.get(i).getImagebitmap());
imageView.setAlpha(((float) alViews.get(i).getOpacity()) / 100.0f);
if (alViews.get(i).getColorFilter() != -1) {
imageView.setColorFilter((alViews.get(i)).getColorFilter());
}
LayoutParams layoutParams2 = new LayoutParams(Math.round((((float) alViews.get(i).getIvSize()) * scale) * alViews.get(i).getScaleW()), Math.round((((float) alViews.get(i).getIvSize()) * scale) * alViews.get(i).getScaleH()));
layoutParams2.setMargins(Math.round(mContext.getResources().getDimension(R.dimen.image_margin) * scale), Math.round(mContext.getResources().getDimension(R.dimen.image_margin) * scale), Math.round(mContext.getResources().getDimension(R.dimen.image_margin) * scale), Math.round(mContext.getResources().getDimension(R.dimen.image_margin) * scale));
imageView.setLayoutParams(layoutParams2);
relativeLayout.addView(imageView);
}
root.addView(relativeLayout);
}
}
}
我相信你的问题是你在你的循环中使用relativeLayout变量而不是relLayout
这意味着relativeLayout会在每次循环迭代加循环之前添加到其父级中。
我相信你需要
...
RelativeLayout relativeLayout = new RelativeLayout(mContext);
relativeLayout.setLayoutParams(new LayoutParams(Constants.saveWidth, Constants.saveWidth));
root.addView(relativeLayout);
for (int i = 0; i < alViews.size(); i++) {
System.out.println("loop " + i);
RelativeLayout relLayout = new RelativeLayout(mContext);
ViewGroup.LayoutParams layoutParams = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
relLayout.setX((float) Math.round(alViews.get(i).getRlx() * scale));
relLayout.setY((float) Math.round(alViews.get(i).getRly() * scale));
relLayout.setRotation(alViews.get(i).getRlrotation());
relLayout.setLayoutParams(layoutParams);
if (alViews.get(i).getType() == 0) {
...
relLayout.setClipToPadding(true);
relLayout.addView(customTextView);
}
...
root.addView(relLayout);
}
}
但是，通过查看代码，您可能更容易将布局定义为XML文件并将其加载到视图中。
看起来好像是在为allTemp数组中的每个项目渲染视图。这看起来很好地利用了回收者的观点，我相信这会更好地为您服务。
这可能会有所帮助：https://developer.android.com/guide/topics/ui/layout/recyclerview