Question

android中怎么隐藏spinner item

就是满足相应条件时隐藏掉spinner中的一条item,求大神啊。

Answer 1

　　spinner item无法被隐藏，只能删除掉。代码如下：
package com.turboradio.googlesdk;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;

public class Ex04_09_Spinner extends Activity {

private static final String [] countriesStr = {

"北京市","上海市","天津市","重庆市"

};

private TextView myTextView;

private EditText myEditText;

private Spinner mySpinner;

private ArrayAdapter<String> adapter;

private List<String> allCountries;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.ex_04_09);

allCountries = new ArrayList<String>();

for(int i = 0;i<countriesStr.length;i++){

allCountries.add(countriesStr[i]);

}

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

adapter.setDropDownViewResource(android.R.layout.simple_spinner_item);

myTextView = (TextView)findViewById(R.id.text1);

myEditText = (EditText)findViewById(R.id.edit);

mySpinner = (Spinner)findViewById(R.id.spinner);

mySpinner.setAdapter(adapter);

mySpinner.setOnItemSelectedListener(new Spinner.OnItemSelectedListener(){

public void onItemSelected(AdapterView<?> parent, View view,

int position, long id) {

myTextView.setText(parent.getSelectedItem().toString());

}

public void onNothingSelected(AdapterView<?> arg0) {

// TODO Auto-generated method stub

}});

}

public void addSpinnerItem(View v){

String newCountry = myEditText.getText().toString();

for(int i = 0;i<adapter.getCount();i++){

if(newCountry.equals(adapter.getItem(i))){

return;

}

}

if(!newCountry.equals("")){

adapter.add(newCountry);

int position = adapter.getPosition(newCountry);

mySpinner.setSelection(position);

myEditText.setText("");

}

}

public void removeSpinnerItem(View v){

if(mySpinner.getSelectedItem() != null){

adapter.remove(mySpinner.getSelectedItem().toString());

myEditText.setText("");

if(adapter.getCount() == 0){

myTextView.setText("");

}

}

}
}

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

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:orientation="vertical" >

<TextView

android:id="@+id/text1"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

/>

<EditText

android:id="@+id/edit"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

/>

<Button

android:id="@+id/add"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="添加"

android:onClick="addSpinnerItem"

/>

<Button

android:id="@+id/delete"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="删除"

android:onClick="removeSpinnerItem"

/>

<Spinner

android:id="@+id/spinner"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

/>
</LinearLayout>

Answer 2

只能把item删除掉

Answer 3

只能把item删除掉