Android的采用微调的ArrayList＆LT填充;串＆GT; [英] Android spinner populating using arraylist<string>

问题描述

即时通讯使用ArrayList中填充微调，而ArrayList的actully从有已经存储在t Android应用程序的数据文件保存数据=我的应用程序，
 IM粘贴code ,,问题是微调，但填充值出现两次

 的String [] =凌晨list2.toArray（新的String [list2.size（）]）;
     最终的String []海峡= {报告1，报告2，报告3，4的报告，报告5};
     ArrayAdapter＆LT;串GT; spinnerArrayAdapter =新ArrayAdapter＆LT;串GT;（
             对此，android.R.layout.simple_spinner_item）;
     spinnerArrayAdapter.setDropDownViewResource（android.R.layout.simple_spinner_dropdown_item）;     的for（int i = 0; I＆LT; wee.length;我++）{
         spinnerArrayAdapter.add（凌晨[I] +\\ n）;
         spinnerArrayAdapter.notifyDataSetChanged（）;
     }     //微调spinYear =（微调）findViewById（R.id.spin）;
     spin.setAdapter（spinnerArrayAdapter）;
 

解决方案

尝试在构造函数中数组初始化微调适配器。

 的String [] =凌晨list2.toArray（新的String [list2.size（）]）;
最终的String []海峡= {报告1，报告2，报告3，4的报告，报告5};
ArrayAdapter＆LT;串GT; spinnerArrayAdapter =新ArrayAdapter＆LT;串GT;（
         对此，android.R.layout.simple_spinner_item，凌晨）;
spinnerArrayAdapter.setDropDownViewResource（android.R.layout.simple_spinner_dropdown_item）;//微调spinYear =（微调）findViewById（R.id.spin）;
spin.setAdapter（spinnerArrayAdapter）;
 

im to populate spinner using arraylist , and that arraylist actully holds data from the file having android application data stored already for t=my application, im pasting the code ,, problem is spinner populates but values appear twice

     String[] wee = list2.toArray(new String[list2.size()]);
     final String[] str={"Report 1","Report 2","Report 3","Report 4","Report 5"};
     ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(
             this, android.R.layout.simple_spinner_item);
     spinnerArrayAdapter.setDropDownViewResource( android.R.layout.simple_spinner_dropdown_item );

     for(int i = 0;i < wee.length; i++){
         spinnerArrayAdapter.add(wee[i]+"\n");
         spinnerArrayAdapter.notifyDataSetChanged();
     }

     // Spinner spinYear = (Spinner)findViewById(R.id.spin);
     spin.setAdapter(spinnerArrayAdapter);            

解决方案

Try to initialize your spinner adapter with array in constructor.

String[] wee = list2.toArray(new String[list2.size()]);
final String[] str={"Report 1","Report 2","Report 3","Report 4","Report 5"};
ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(
         this, android.R.layout.simple_spinner_item, wee);
spinnerArrayAdapter.setDropDownViewResource( android.R.layout.simple_spinner_dropdown_item );

// Spinner spinYear = (Spinner)findViewById(R.id.spin);
spin.setAdapter(spinnerArrayAdapter);

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