Java-将ArrayList对象添加到Android中的GridView

内容导读

互联网集市收集整理的这篇技术教程文章主要介绍了Java-将ArrayList对象添加到Android中的GridView，小编现在分享给大家，供广大互联网技能从业者学习和参考。文章包含4089字，纯文字阅读大概需要6分钟。

内容图文

您好,我正在一个项目中,我必须将“ Person”类型的ArrayList中的“ Person”类型的每个对象插入到Eclipse Android中的Gridview中.我的意图是显示带有该人姓名的图片(类似于Instagram).到目前为止,这是我尝试过的方法,但这似乎不起作用,但我很难理解.

你们有更好的解决方案吗？

ArrayList<Person> dbPersons = dop.getPersons(dop); //This is where I populate my list
int[] imageId = {
            R.drawable.image1,
            R.drawable.image2,
            R.drawable.image3
    };

            gridView = (GridView)findViewById(R.id.grid);
            gridView.setAdapter(new function.CustomGrid(this, dbPersons, imageId));
            gridView.setOnItemClickListener(new OnItemClickListener() {

                @Override
                public void onItemClick(AdapterView<?> parent, View view,
                        int position, long id) {
                    // TODO Auto-generated method stub

                }

            });

我的人的课程通常包含：

private String FName;
private String LName;
private String Biography;

无论如何,我不想用错误的代码轰炸这篇文章,因为我正在寻找一种更清洁,更好的选择.我只想将名称显示为gridview项的标题及其下的图片,并对arraylist中的其余对象执行相同的操作.你能帮我个忙吗:)

解决方法:

您的适配器

 public class Benildus_Adapter extends ArrayAdapter<Person> {

ArrayList<Person> list; // your person arraylist
Context context; // the activity context
int resource; // this will be your xml file

public Benildus_Adapter(Context context, int resource,ArrayList<Person> objects) {
    super(context, resource, objects);
    // TODO Auto-generated constructor stub
    this.list = objects;
    this.context = context;
    this.resource = resource;
}

@Override
public int getCount() {
    // TODO Auto-generated method stub
    if(list.size() == 0){
        return 0;
    }else{
        return list.size();
    }
}

@Override
public View getView(final int position, View convertView, ViewGroup parent) {
    // TODO Auto-generated method stub
    View child = convertView;
    RecordHolder holder;
    LayoutInflater inflater = ((Activity) context).getLayoutInflater(); // inflating your xml layout

    if (child == null) {            
        child = inflater.inflate(resource, parent, false);
        holder = new RecordHolder();
        holder.fname = (TextView) child.findViewById(R.id.fname); // fname is the reference to a textview
        holder.lname = (TextView) child.findViewById(R.id.lname); // in your xml layout file 
        holder.bio =(TextView) child.findViewById(R.id.bio); // you are inflating.etc
        child.setTag(holder);
    }else{
        holder = (RecordHolder) child.getTag();
    }

    final Person user = list.get(position); // you can remove the final modifieer.

    holder.fname.setText(user.getFName());      
    holder.lname.setText(user.getLName());
    holder.bio.setText(user.getBiography());
    holder.image.setImageBitmap(user.getImage()); // if you use string then you download the image using
    // the string as url and set it to your imageview..
    return child;
}

static class RecordHolder {
    TextView fname,lname,bio;
    ImageView image;    
}


@Override
public void notifyDataSetChanged() { // you can remove this..
    // TODO Auto-generated method stub      
    if(getCount() == 0){
        //show layout or something that notifies that no list is in..
    }else{
        // this is to make sure that you can call notifyDataSetChanged in any place and any thread
        new Handler(getContext().getMainLooper()).post(new Runnable() {

            @Override
            public void run() {
                // TODO Auto-generated method stub
                Benildus_Adapter.super.notifyDataSetChanged();
            }
        });
    }
}

} 

你的人班

 public class Person {

private String FName;
private String LName;
private String Biography;
private Bitmap image; // add the image too to your class, you can store the url of the image 
// or save it using bitmap.. if you store the url then = String image; the load the image
// in the getview method.. any way you choose..
public String getFName() {
    return FName;
}
public void setFName(String fName) {
    FName = fName;
}
public String getLName() {
    return LName;
}
public void setLName(String lName) {
    LName = lName;
}
public String getBiography() {
    return Biography;
}
public void setBiography(String biography) {
    Biography = biography;
}
public Bitmap getImage() {
    return image;
}
public void setImage(Bitmap image) {
    this.image = image;
}

}

编辑我只是忘了设置适配器.

 gridView = (GridView)findViewById(R.id.grid);
 Benildus_Adapter bA = new Benildus_Adapter(this, R.layout.myxml,dbPersons);
 gridView.setAdapter(bA);

希望对您有所帮助,让我知道

内容总结

以上是互联网集市为您收集整理的Java-将ArrayList对象添加到Android中的GridView全部内容，希望文章能够帮你解决Java-将ArrayList对象添加到Android中的GridView所遇到的程序开发问题。 如果觉得互联网集市技术教程内容还不错，欢迎将互联网集市网站推荐给程序员好友。

内容备注

版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 gblab@vip.qq.com 举报，一经查实，本站将立刻删除。

内容手机端

---