我正在开发照片编辑应用程序,我在回收站视图中显示贴纸 . 我正在动态设置膨胀视图的高度和宽度,如代码所示它在所有android os版本中工作正常除了nougat.In nougat,parent.getHeight()返回0.我不想设置高度和宽度静态我不要我知道我做错了什么
package com.demo.makefunnyface.Adapters;
import android.content.Context;
import android.os.Handler;
import android.support.v7.widget.RecyclerView;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;
import com.demo.makefunnyface.R;
import com.demo.makefunnyface.Utils.PojoSticker;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
import java.util.ArrayList;
import java.util.List;
/**
* Created by hp on 9/5/2017.
*/
public class AdapterSticker extends RecyclerView.Adapter<AdapterSticker.MyHolder> {
Context context;
List<PojoSticker> stickersList = new ArrayList<>();
OnSelectListener onSelectListener;
DisplayImageOptions displayImageOptions;
ImageLoader imageLoader;
ImageLoaderConfiguration imageLoaderConfiguration;
public AdapterSticker(Context context, List<PojoSticker> stickersList) {
this.context = context;
this.stickersList.addAll(stickersList);
displayImageOptions = new DisplayImageOptions.Builder().cacheOnDisk(true).cacheInMemory(true).build();
imageLoaderConfiguration = new ImageLoaderConfiguration.Builder(context).defaultDisplayImageOptions(displayImageOptions).build();
imageLoader = ImageLoader.getInstance();
imageLoader.init(imageLoaderConfiguration);
}
@Override
public MyHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(context).inflate(R.layout.item_sticker_layout, parent, false);
RecyclerView.LayoutParams layoutParams = (RecyclerView.LayoutParams) view.getLayoutParams();
layoutParams.height = parent.getHeight();
layoutParams.width = parent.getHeight();
//nougat show zero in log
Log.e("height", "" + parent.getHeight());
view.setLayoutParams(layoutParams);
return new MyHolder(view);
}
@Override
public void onBindViewHolder(MyHolder holder, int position) {
imageLoader.displayImage(stickersList.get(position).getPath(), holder.imgSticker);
}
@Override
public int getItemCount() {
return stickersList.size();
}
class MyHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
ImageView imgSticker;
public MyHolder(View itemView) {
super(itemView);
imgSticker = (ImageView) itemView.findViewById(R.id.imgSticker);
imgSticker.setOnClickListener(this);
}
@Override
public void onClick(View v) {
PojoSticker pojoSticker = stickersList.get(getAdapterPosition());
if (onSelectListener != null) {
onSelectListener.onSelected(pojoSticker);
}
}
}
public interface OnSelectListener {
void onSelected(PojoSticker pojoSticker);
}
public void setSelectListener(OnSelectListener onSelectListener) {
this.onSelectListener = onSelectListener;
}
public int dpToPx(int dp) {
DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics();
int tmp = (int) ((dp * displayMetrics.density) + 0.5);
Log.e("tmp", "" + tmp);
return tmp;
}
}
2 回答
问题不在于onCreateViewHolder,在那里你将数据添加到recyclerview(触发对象创建),因为在onCreate你的视图没有完成测量,你必须计算它延迟,如onResume .
这是因为在创建时您的视图不存在 . 试试你的onBindViewHolder