android ListView内容无限循环显示
其实要达到无限循环显示，主要就是实现继承Adapter的类。
我这里用到的是BaseAdapter
private class MyAdapter extends BaseAdapter{ private Context context; private String[] strs = null; LayoutInflater inflater = null; public MyAdapter(Context context){ this.context = context; //listview中循环显示的数据 strs = new String[]{"0","1","2","3","4","5","6","7","8","9"}; inflater = LayoutInflater.from(context); } public MyAdapter(){ }@Overridepublic int getCount() {// TODO Auto-generated method stub//返回int可以保存的最大值，此值为2147483647return Integer.MAX_VALUE;}@Overridepublic Object getItem(int position) {// TODO Auto-generated method stubreturn position;}@Overridepublic long getItemId(int position) {// TODO Auto-generated method stubreturn position;}@Overridepublic View getView(int position, View view, ViewGroup parent) {// TODO Auto-generated method stubViewHolder holder = null;if(view == null){holder = new ViewHolder();view = inflater.inflate(R.layout.textview, null);holder.text = (TextView) view.findViewById(R.id.text);view.setTag(holder);}else{holder = (ViewHolder) view.getTag();}//strs[position%strs.length]实现listview中数据的循环holder.text.setText(strs[position%strs.length]);return view;} } class ViewHolder{ public TextView text; }在onCreate方法中将adapter赋值给listview
@Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); listView = (ListView) findViewById(R.id.listview); MyAdapter adapter = new MyAdapter(this); listView.setAdapter(adapter); listView.setSelection(Integer.MAX_VALUE/2+1); //设置listview初始化以后的默认选中项，要不然listview初始化以后只能向上拖动而不能向下拖动。 }
其实，严格来说，此程序并不是无限循环，只不过listview内数据太多，达到20多个亿，所以也可以算作是无限循环。