安卓_下拉框spinner

private String[] data = {"AAA","BBB","CCC"};

spinner1 = findViewById(R.id.spinner);
spinner1.setAdapter(new ArrayAdapter<String>(this,
        android.R.layout.simple_dropdown_item_1line,
        android.R.id.text1,
        data));
spinner1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
    @Override
    public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
        Log.v("1", data[position]);
    }

    @Override
    public void onNothingSelected(AdapterView<?> parent) {

    }
});

ArrayList<String> datas=new ArrayList<String>();
for (int i = 0; i < 10; i++) {
    datas.add("AAA:"+i);
}
//
MyAdapter adapter=new MyAdapter(datas);
spinner1.setAdapter(adapter);

// 自定义Adapter继承BaseAdapter
public class MyAdapter extends BaseAdapter {

	private ArrayList<String> mDatas;
	
	public MyAdapter(ArrayList<String> datas) {
		mDatas=datas;
	}

	@Override
	public int getCount() {
		return mDatas.size();
	}
	
	// 监听点击
	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		Log.v("ldx", "getView position="+position);
		
		LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
		View view = layoutInflater.inflate(R.layout.lv_item_layout, null);
		TextView tv=(TextView) view.findViewById(R.id.tv);
		tv.setText(mDatas.get(position));
		return view;
	}

	@Override
	public Object getItem(int position) {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	public long getItemId(int position) {
		// TODO Auto-generated method stub
		return 0;
	}
}

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:textSize="24sp"
    android:textColor="#F00"
    android:gravity="center"
    android:id="@+id/tv" />