动态加载旋转器值

Question

我试图动态地将值加载到我的旋转器中，但是在这里我得到一个错误“this,android.r.layout.simple_spinner_item,colors”错误是：

错误：（109,52）错误：找不到合适的ArrayAdapter（GuestListFragment,int,String[])构造函数ArrayAdapter。ArrayAdapter（Context,int,int）不适用（参数不匹配；GuestListFragment无法转换为上下文）构造函数ArrayAdapter。ArrayAdapter（Context,int,String[])不适用（参数不匹配；GuestListFragment无法转换为上下文）构造函数ArrayAdapter。ArrayAdapter（Context,int,String[])不适用（参数不匹配；GuestListFragment无法转换为上下文

// Spinner
colorSpinner = (Spinner) guestView.findViewById(R.id.dateSpinner);

// Array of choices
String colors[] = {"Red","Blue","White","Yellow","Black", "Green","Purple","Orange","Grey"};

// Update Spinner
ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, colors);
spinnerArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); // The drop down view
colorSpinner.setAdapter(spinnerArrayAdapter);

Answer 1

Use ArrayAdapter spinner ArrayAdapter=new ArrayAdapter（getContext（）,android.r.layout.simple_spinner_item,colors）；

或ArrayAdapter spinnerArrayAdapter=new ArrayAdapter（getActivity（）,android.r.layout.simple_spinner_item,colors）；

而不是ArrayAdapter spinnerArrayAdapter=new ArrayAdapter（getContext（）,android.r.layout.simple_spinner_item,colors）；

Answer 2

您的context参数有问题。还可以尝试更改new arrayadapter ->new arrayadapter<>。

ArrayAdapter<String> adapter = new ArrayAdapter<>(getContext(), R.layout. simple_spinner_item, colors);

Answer 3

请尝试以下代码：

String items[] = new String[2];
items[0] = String.valueOf("Item #1");
items[0] = String.valueOf("Item #2");

ArrayAdapter<String> spinnerArrayAdapter =
    new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, items);

spinnerArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

Spinner spinner = (Spinner) findViewById(R.id.spinner);
spinner.setAdapter(spinnerArrayAdapter);

如果您在片段中，则将“this”替换为“getContext（）”