android pickerView滚筒选择列表之图片选择器
近期项目需求 一个滚筒图片选择列表 想来想去没有合适的 ios有一个pickerView 是可以的 而我大安卓我没有想起来有这样效果图 ( 可能是我没想起来) 时间比较赶 简易性 超简单的图片滚筒选择列表
思路 ： 其实很简单 popupwindow+listview 你可以给list view固定高度 listview的item 也固定 popupwindow视图内显示你想要的个数 可以上下滑动 再给listview的item一个点击变色 就可以了 下面上代码
popwindow的布局代码
xml
给个效果图吧
listview 条目是40x40的图片 让它居中就行了
java 代码
public class MainActivity extends AppCompatActivity {
private Button mainbt;
private PopupWindow popupWindow;
private WindowManager.LayoutParams params;
private ImageView mainimg;
private int p = 1001;
private ImageView img1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mainbt = (Button) findViewById(R.id.main_bt);
mainimg = (ImageView) findViewById(R.id.main_img);
img1 = (ImageView) findViewById(R.id.main_img1);
RotateAnimation animation = new RotateAnimation(0,-15,50,50);
animation.setRepeatCount(1);
animation.setFillAfter(true);
animation.setDuration(1);
img1.startAnimation(animation);
mainbt.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
showPopupWindow(v);
}
});
}
private void showPopupWindow(View v) {
View view = getLayoutInflater().inflate(R.layout.popup_window, null);
popupWindow = new PopupWindow(view, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT,true);
//点击外部区域popwindow消失
popupWindow.setBackgroundDrawable(new BitmapDrawable());
popupWindow.setFocusable(true);
//显示(靠中间)
popupWindow.showAtLocation(findViewById(R.id.main_view), Gravity.BOTTOM, 0, 0);
TextView popsure = (TextView) view.findViewById(R.id.pop_sure);
TextView popcancel = (TextView) view.findViewById(R.id.pop_cancel);
List list = new ArrayList<>();
for (int i = 0; i < 6; i++) {
list.add(i);
}
ListView lv_list = (ListView) view.findViewById(R.id.grade_list);
final PopAdapter popAdapter = new PopAdapter(MainActivity.this, (ArrayList) list);
lv_list.setAdapter(popAdapter);
lv_list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView parent, View view,
int position, long id) {
p = position;
Toast.makeText(MainActivity.this, "点击了条目--"+position, Toast.LENGTH_SHORT).show();
// popupWindow.dismiss();
}
});
lv_list.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView parent, View view, int position, long id) {
Toast.makeText(MainActivity.this, "选中了---"+position, Toast.LENGTH_SHORT).show();
}
@Override
public void onNothingSelected(AdapterView parent) {
Toast.makeText(MainActivity.this, "没选中", Toast.LENGTH_SHORT).show();
}
});
popsure.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(MainActivity.this, "确定--"+p, Toast.LENGTH_SHORT).show();
switch (p){
case 1001:
break;
case 0:
mainimg.setImageResource(R.drawable.gouone);
break;
case 1:
mainimg.setImageResource(R.drawable.goutwo);
break;
case 2:
mainimg.setImageResource(R.drawable.gouthree);
break;
case 3:
mainimg.setImageResource(R.drawable.goufour);
break;
case 4:
mainimg.setImageResource(R.drawable.goufive);
break;
case 5:
mainimg.setImageResource(R.drawable.gousix);
break;
}
popupWindow.dismiss();
}
});
popcancel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
popupWindow.dismiss();
}
});
}
// listview 适配器
class PopAdapter extends BaseAdapter{
Context context;
ArrayList list;
public PopAdapter(Context context, ArrayList list) {
this.context=context;
this.list=list;
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
return list.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view;
ViewHolder holder;
if (convertView==null){
view = View.inflate(context,R.layout.item_pop,null);
holder = new ViewHolder();
holder.popimg = (ImageView) view.findViewById(R.id.pop_img);
view.setTag(holder);
}else {
view= convertView;
holder = (ViewHolder) view.getTag();
}
switch (list.get(position)){
case 0:
holder.popimg.setImageResource(R.drawable.gouone);
break;
case 1:
holder.popimg.setImageResource(R.drawable.goutwo);
break;
case 2:
holder.popimg.setImageResource(R.drawable.gouthree);
break;
case 3:
holder.popimg.setImageResource(R.drawable.goufour);
break;
case 4:
holder.popimg.setImageResource(R.drawable.goufive);
break;
case 5:
holder.popimg.setImageResource(R.drawable.gousix);
break;
}
return view;
}
class ViewHolder{
ImageView popimg;
}
}
}
效果图
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