获取微调器选定的项目文本？

Question

如何获取微调器所选项目的文本？

当我单击“保存”按钮时，我必须获取微调器中所选项目的文本。 我需要文本而不是索引。

Answer 1

Spinner spinner = (Spinner)findViewById(R.id.spinner);
String text = spinner.getSelectedItem().toString();

Answer 2

TextView textView = (TextView)mySpinner.getSelectedView();
String result = textView.getText().toString();

Answer 3

您必须使用索引和适配器来查找您拥有的文本请参阅

这个 Spinner 示例< /a>

public class MyOnItemSelectedListener implements OnItemSelectedListener {

    public void onItemSelected(AdapterView<?> parent,
        View view, int pos, long id) {
      Toast.makeText(parent.getContext()), "The planet is " +
          parent.getItemAtPosition(pos).toString(), Toast.LENGTH_LONG).show();
    }

    public void onNothingSelected(AdapterView parent) {
      // Do nothing.
    }
}

Answer 4

Spinner 返回数组的整数值。您必须根据索引检索字符串值。

Spinner MySpinner = (Spinner)findViewById(R.id.spinner);
Integer indexValue = MySpinner.getSelectedItemPosition();

Answer 5

使用这个

import java.util.ArrayList;   
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.text.Editable;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.Toast;

public class dynamic_spinner_main extends Activity {

    private Spinner m_myDynamicSpinner;
    private EditText m_addItemText;
    private ArrayAdapter<CharSequence> m_adapterForSpinner;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_spinner);

        ///////////////////////////////////////////////////////////////
        //grab our UI elements so we can manipulate them (in the case of the Spinner)
        //    or add listeners to them (in the case of the buttons)
        m_myDynamicSpinner = (Spinner)findViewById(R.id.dynamicSpinner);        
        m_addItemText = (EditText)findViewById(R.id.newSpinnerItemText);
        Button addButton = (Button)findViewById(R.id.AddBtn);
        Button clearButton = (Button)findViewById(R.id.ClearBtn);

        ////////////////////////////////////////////////////////////////
        //create an arrayAdapter an assign it to the spinner
        m_adapterForSpinner = new ArrayAdapter(this, android.R.layout.simple_spinner_item);
        m_adapterForSpinner.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);        
        m_myDynamicSpinner.setAdapter(m_adapterForSpinner);
        m_adapterForSpinner.add("gr");        
        m_myDynamicSpinner.setOnItemSelectedListener(new OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
                // your code here
                Intent mIntent=new Intent(dynamic_spinner_main.this,sampleLocalization.class);
                mIntent.putExtra("lang", m_myDynamicSpinner.getItemIdAtPosition(position));
                System.out.println("Spinner value...."+m_myDynamicSpinner.getSelectedItem().toString());
                startActivity(mIntent);
            }

            @Override
            public void onNothingSelected(AdapterView<?> parentView) {
                // your code here
            }

        });
        ////////////////////////////////////////////////////////////////
        //add listener for addButton
        addButton.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View v) {               
                addNewSpinnerItem();
            }                   
        });

        ////////////////////////////////////////////////////////////////
        //add listener for addButton
        clearButton.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View v) {
                clearSpinnerItems();
            }           
        });  
    }

    private void addNewSpinnerItem() {
        CharSequence textHolder = "" + m_addItemText.getText();
        m_adapterForSpinner.add(textHolder);
    }

    private void clearSpinnerItems() {
        m_adapterForSpinner.clear();
        m_adapterForSpinner.add("dummy item");
    }       
}

main_spinner.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

    <EditText android:layout_height="wrap_content" 
            android:layout_margin="4px" 
            android:id="@+id/newSpinnerItemText" 
            android:layout_width="fill_parent"></EditText>
    <Button android:layout_height="wrap_content" 
            android:id="@+id/AddBtn" 
            android:layout_margin="4px" 
            android:layout_width="fill_parent" 
            android:text="Add To Spinner"></Button>
    <Button android:layout_height="wrap_content" 
            android:id="@+id/ClearBtn" 
            android:layout_margin="4px" 
            android:layout_width="fill_parent" 
            android:text="Clear Spinner Items"></Button>
    <Spinner android:layout_height="wrap_content" 
            android:id="@+id/dynamicSpinner" 
            android:layout_margin="4px" 
            android:layout_width="fill_parent"></Spinner>
</LinearLayout>

Answer 6

spinner_button.setOnItemSelectedListener(new OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?>arg0, View view, int arg2, long arg3) {

            String selected_val=spinner_button.getSelectedItem().toString();

            Toast.makeText(getApplicationContext(), selected_val ,
                    Toast.LENGTH_SHORT).show();
        }

        @Override
        public void onNothingSelected(AdapterView<?> arg0) {
            // TODO Auto-generated method stub

        }
    });

}

Answer 7

设置微调适配器后，此代码将有所帮助

spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
            Toast.makeText(getApplicationContext(), "This is " +
                    adapterView.getItemAtPosition(i).toString(), Toast.LENGTH_LONG).show();

            try {
                //Your task here
            }catch (Exception e)
            {
                e.printStackTrace();
            }
        }

        @Override
        public void onNothingSelected(AdapterView<?> adapterView) {

        }
    });

Answer 8

一行版本：

String text = ((Spinner)findViewById(R.id.spinner)).getSelectedItem().toString();

更新：
如果您使用 SDK 26（或更高版本）编译项目，则可以删除转换。

String text = findViewById(R.id.spinner).getSelectedItem().toString();

Answer 9

TextView textView = (TextView) spinActSubTask.getSelectedView().findViewById(R.id.tvProduct);

String subItem = textView.getText().toString();

Answer 10

它也可以使用 String.valueOf() 就像这样，

Spinner sp = (Spinner) findViewById(R.id.sp_id);
String selectedText = String.valueOf(sp.getSelectedItem());

当一切崩溃时，应用程序不会崩溃。
其安全性背后的原因是能够将 null 对象作为参数进行处理。文档说

如果参数为null，则字符串等于"null"；否则，值为 obj.toString()。




因此，有一些保险可以防止 空 Spinner 的情况，当前所选项目必须转换为 String。

Answer 11

对于基于 CursorAdapter 的微调器：

• 获取所选项目 ID：spinner.getSelectedItemId()

• 从数据库中获取项目名称，例如：

  public String getCountryName(int pId){
      Cursor cur = mDb.query(TABLE, new String[]{COL_NAME}, COL_ID+"=?", new String[]{pId+""}, null, null, null);
      字符串 ret = null;
      if(cur.moveToFirst()){
          ret = cur.getString(0);
      }
      cur.close();
      返回ret；
  }
  

Answer 12

Spinner spinner = (Spinner) findViewById(R.id.yourspinnerid);
String text = spinner.getSelectedItem().toString();

Answer 13

对于那些具有基于 HashMap 的微调器：

((HashMap)((Spinner)findViewById(R.id.YourSpinnerId)).getSelectedItem()).values().toArray()[0].toString();

如果您处于除主要活动之外的片段、适配器或类中，请使用此：

((HashMap)((Spinner)YourInflatedLayoutOrView.findViewById(R.id.YourSpinnerId)).getSelectedItem()).values().toArray()[0].toString();

这仅用于指导；您应该在 onClick 方法之前找到您的视图 ID。