Question

当我向下滚动列表视图时，它正常工作，只有很少的元素，但当它有更多的元素时它会崩溃一旦我向下滚动..我需要一个解释我的概率在哪里以及如何解决它... thx in预先

这是OurContact.contacts_names是arraylist的适配器：

ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(),
android.R.layout.simple_list_item_1, OurContact.contacts_names);
listView.setAdapter(adapter);

提前谢谢

Answer 1

尝试使用CustomAdapter来回收内存以防止崩溃......这是有效使用ListView的更好方法

在res / layout文件夹中为Listitem创建布局

list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:padding="5dp" >

    <TextView
        android:id="@+id/category_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_toRightOf="@+id/drawer_icon"
        android:layout_marginLeft="15dp"
        android:textSize="17sp"
        android:layout_centerVertical="true"
        android:textColor="#333333" />


</RelativeLayout>

创建CustomAdapter

MyCustomAdapter.java

import java.util.ArrayList;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;


public class MyCustomAdapter extends ArrayAdapter<String> {
Context context;
ArrayList<String> categories=null;
    public MyCustomAdapter(Context context,ArrayList<String> categories) {
        super(context, R.layout.list_item,categories);
        this.categories=categories;
        this.context=context;
    }

    public class ViewHolder
    {
        public TextView cat;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
         if (convertView == null) {
            convertView = inflater.inflate(R.layout.list_item, parent, false);
            holder=new ViewHolder();
            holder.cat=(TextView) convertView.findViewById(R.id.category_name);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }
         holder.cat.setText(categories.get(position));
         return convertView; 
    }

}

现在只需使用此适配器填充ListView

listView.setAdapter(new MyCustomAdapter<String>(this,OurContact.contacts_names));

Android .. ListView崩溃，当我向下滚动sorta沿着dapter喂它..

1 个答案: