Question

即时通讯使用arraylist填充微调器，并且该arraylist实际保存来自已存储用于t =我的应用程序的android应用程序数据的文件中的数据，我粘贴代码，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

尝试使用构造函数中的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);

Answer 2

private void setSpinner() {
    spinner = (Spinner) findViewById(R.id.spinner_size);

    Intent intent = getIntent();

    ArrayList<String> sizes = null;

    if (intent != null) {
      // Receiving ArrayList in Another Activity where "sizeList" is the Key
        sizes = intent.getStringArrayListExtra("SizeList");
    }

    if (sizes != null) {

        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, sizes);

        spinner.setAdapter(adapter);

        // Spinner click listener
        spinner.setOnItemSelectedListener(this);
    }


}

从OnCreate（）方法调用setSpinner（）方法。您可以直接将ArrayList作为参数传递，不需要转换为String []。

使用arraylist <string> </string>填充的Android微调器

2 个答案: