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                        /Android-打造万能适配器

求解！为什么运行后模拟器一片空白~ 代码附上了~

MyAdapter.java

public class MyAdapter extends BaseAdapter {
private LayoutInflater mInflater;
private List<Bean> mDatas;
public MyAdapter(Context context,List<Bean> datas) {
mInflater = LayoutInflater.from(context);
mDatas = datas;
}

@Override
public int getCount() {
return mDatas.size();
}

@Override
public Object getItem(int position) {
return mDatas.get(position);
}

@Override
public long getItemId(int position) {
return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if(convertView == null){
convertView = mInflater.inflate(R.layout.item_listview,parent,false);
holder = new ViewHolder();

holder.mTitle = (TextView)convertView.findViewById(R.id.id_title);
holder.mDesc = (TextView)convertView.findViewById(R.id.id_desc);
holder.mTime = (TextView)convertView.findViewById(R.id.id_time);
holder.mPhone = (TextView)convertView.findViewById(R.id.id_phone);

convertView.setTag(holder);
}else{
holder = (ViewHolder)convertView.getTag();
}
Bean bean = mDatas.get(position);
holder.mTitle.setText(bean.getTitle());
holder.mDesc.setText(bean.getDesc());
holder.mTime.setText(bean.getTime());
holder.mPhone.setText(bean.getPhone());

return convertView;
}
private class ViewHolder{
TextView mTitle;
TextView mDesc;
TextView mTime;
TextView mPhone;

}

MainActivity.java

public class MainActivity extends Activity {
private ListView mListView;
private List<Bean> mDatas;
private MyAdapter myAdapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initDatas();
initView();
}

private void initView() {
mListView = (ListView)findViewById(R.id.id_listview);
mListView.setAdapter(myAdapter);

}

private void initDatas() {
mDatas = new ArrayList<Bean>();
Bean bean = new Bean("Android新技能1",
"Android-打造万能的ListView和GridView适配器",
"2015-10-12", "10086");
mDatas.add(bean);
bean = new Bean("Android新技能2",
"Android-打造万能的ListView和GridView适配器",
"2015-10-12", "10086");
mDatas.add(bean);
bean = new Bean("Android新技能3",
"Android-打造万能的ListView和GridView适配器",
"2015-10-12", "10086");
mDatas.add(bean);
bean = new Bean("Android新技能4",
"Android-打造万能的ListView和GridView适配器",
"2015-10-12", "10086");
mDatas.add(bean);
bean = new Bean("Android新技能5",
"Android-打造万能的ListView和GridView适配器",
"2015-10-12", "10086");
mDatas.add(bean);

myAdapter = new MyAdapter(this,mDatas);

}

lynhao

2015-10-12

源自：Android-打造万能适配器 1-3

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2 回答

sakamichi
2016-04-06

MainActivity.java
public class MainActivity extends AppCompatActivity {
    private ListView mlistView;
    private List<ContactsBean> mData;
    private MyAdapter mAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        initView();
        initData();


    }

    private void initData() {
        mData = new ArrayList<>();
        for (int i = 0; i < 50; i++) {
            ContactsBean bean = new ContactsBean(R.drawable.p1376360136, "Billd", "13917360951");
            mData.add(bean);

            bean = new ContactsBean(R.drawable.p1505752091, "Coco", "13818806406");
            mData.add(bean);

            bean = new ContactsBean(R.drawable.p1746919689, "Rokuhachi", "18616925671");
            mData.add(bean);

            bean = new ContactsBean(R.drawable.p1819927209, "Daku", "10086");
            mData.add(bean);
        }
        mAdapter = new MyAdapter(this, mData);
    }

    private void initView() {
        mlistView = (ListView) findViewById(R.id.LV);

        mlistView.setAdapter(mAdapter);
    }
}

MyAdapter.java
public MyAdapter(Context context, List<ContactsBean> data) {
        mlayoutInflater = LayoutInflater.from(context);
        mData = data;
        this.context = context;
    }

    @Override
    public int getCount() {
        return mData.size();
    }

    @Override
    public Object getItem(int position) {
        return mData.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup viewGroup) {
        ViewHolder viewHolder;
        if (convertView == null) {
            //convertView=View.inflate(context,R.layout.element_layout,null);
            convertView = mlayoutInflater.inflate(R.layout.element_layout, viewGroup, false);
            viewHolder = new ViewHolder();
            viewHolder.mName = (TextView) convertView.findViewById(R.id.ETV1);
            viewHolder.mPhone = (TextView) convertView.findViewById(R.id.ETV2);
            viewHolder.mIcon = (ImageView) convertView.findViewById(R.id.EIV1);

            convertView.setTag(viewHolder);
        } else {
            viewHolder = (ViewHolder) convertView.getTag();
        }

        ContactsBean bean = mData.get(position);
        viewHolder.mName.setText(bean.getName());
        viewHolder.mPhone.setText(bean.getTelephone());
        viewHolder.mIcon.setImageResource(bean.getIcon());

        return convertView;
    }

    private class ViewHolder {
        TextView mName;
        TextView mPhone;
        ImageView mIcon;
    }
}