package org.example.mbtiapplication;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
public class MBTITest extends Activity implements OnItemSelectedListener {
private Spinner firstSpinner;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_mbtitest);
Spinner firstSpinner = (Spinner) findViewById(R.id.spinner1);
// Create an ArrayAdapter using the string array and a default spinner layout
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
R.array.spinnerarraybool, android.R.layout.simple_spinner_item);
// Specify the layout to use when the list of choices appears
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// Apply the adapter to the spinner
firstSpinner.setAdapter(adapter);
}
@Override
public void onItemSelected(AdapterView<?> parent, View v, int position,
long id) {
// TODO Auto-generated method stub
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
}
XML布局：
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<TableRow
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TextView
android:layout_width="120dp"
android:layout_height="match_parent"
android:layout_marginLeft="5dp"
android:gravity="center_vertical"
android:text="I like to go out more than staying home." />
<Spinner
android:id="@+id/spinner1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</TableRow>
<TableRow
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TextView
android:layout_width="120dp"
android:layout_height="match_parent"
android:layout_marginLeft="5dp"
android:gravity="center_vertical"
android:textSize="10.5dp"
android:text="Sensing v Intuition" />
<Spinner
android:id="@+id/spinner2"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</TableRow>
</TableLayout>
我是一个新的Android程序员，使用Spinner时遇到了麻烦，我尝试了多个教程但仍感到困惑。我想知道我的下一步是什么，据我所知，我已经用XML设置了我的微调器，用Java我已经确定了微调器，为所述微调器创建了一个ArrayAdapter，并指定了一些选项。我不确定我是否已经填充了微调器，或者如何使用微调器对象进行操作。我希望能够使用微调器对象选择三个选项之一，然后将该值保留在微调器内的textview内。
你快到了。如您所见，onItemSelected将为您提供position参数，您可以使用它从适配器中检索对象，如getItemAtPosition(position)。
例：
spinner.setOnItemSelectedListener(this);
...
public void onItemSelected(AdapterView<?> parent, View view, int pos,long id) {
Toast.makeText(parent.getContext(),
"OnItemSelectedListener : " + parent.getItemAtPosition(pos).toString(),
Toast.LENGTH_SHORT).show();
}
这将在屏幕上显示一条消息，其中所选项目由其toString（）方法打印。
如果你不想实现监听器，你可以直接在你想要的地方设置它（在你的适配器设置完成后调用你的微调器）：
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
switch (position) {
case 0:
Toast.makeText(parent.getContext(), "Spinner item 1!", Toast.LENGTH_SHORT).show();
break;
case 1:
Toast.makeText(parent.getContext(), "Spinner item 2!", Toast.LENGTH_SHORT).show();
break;
case 2:
Toast.makeText(parent.getContext(), "Spinner item 3!", Toast.LENGTH_SHORT).show();
break;
}
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
// sometimes you need nothing here
}
});
另一件事：当您的布局中有多个微调器时，您必须在onItemSelected（）方法中实现一个开关选择，以了解单击哪个窗口小部件。像这样的东西：
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
switch (parent.getId()){
case R.id.sp_alarmSelection:
//Do something
Toast.makeText(this, "Alarm Selected: " + parent.getSelectedItem().toString(), Toast.LENGTH_SHORT).show();
break;
case R.id.sp_optionSelection:
//Do another thing
Toast.makeText(this, "Option Selected: " + parent.getSelectedItem().toString(), Toast.LENGTH_SHORT).show();
break;
}
}
约瑟夫：spinner.setOnItemSelectedListener(this)应该低于Spinner firstSpinner = (Spinner) findViewById(R.id.spinner1);的onCreate
spinner1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
//check if spinner2 has a selected item and show the value in edittext
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
// sometimes you need nothing here
}
});
spinner2.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
//check if spinner1 has a selected item and show the value in edittext
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
// sometimes you need nothing here
}
});
对于Kotlin和绑定代码是：
binding.spinner.onItemSelectedListener = object : AdapterView.OnItemSelectedListener{
override fun onNothingSelected(parent: AdapterView<*>?) {
}
override fun onItemSelected(parent: AdapterView<*>?, view: View?, position: Int, id: Long) {
}
}
我认为这会让你受益试试这个我用来改变我的应用程序中的语言
String[] districts;
Spinner sp;
......
sp = (Spinner) findViewById(R.id.sp);
districts = getResources().getStringArray(R.array.lang_array);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,districts);
sp.setAdapter(adapter);
sp.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int position, long arg3) {
// TODO Auto-generated method stub
int index = arg0.getSelectedItemPosition();
Toast.makeText(getBaseContext(), "You select "+districts[index]+" id "+position, Toast.LENGTH_LONG).show();
switch(position){
case 0:
setLocal("fr");
//recreate();
break;
case 1:
setLocal("ar");
//recreate();
break;
case 2:
setLocal("en");
//recreate();
break;
default: //For all other cases, do this
setLocal("en");
//recreate();
break;
}
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
这是我的String Array
<string-array name="lang_array">
<item>french</item>
<item>arabic</item>
<item>english</item>
</string-array>