java - 使用 arraylist<string> 填充 Android 微调器

Question

我使用 arraylist 来填充微调器，并且 arraylist 实际上保存了已经为 t=my 应用程序存储了 android 应用程序数据的文件中的数据， 我正在粘贴代码，问题是微调器填充但值出现两次

     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);            

Answer 1

尝试在构造函数中使用数组初始化微调器适配器。

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);