[英]Set TextView Text to Spinner Selected Item
How do I set a TextView's text to a Spinner's selected text? 如何将TextView的文本设置为微调框的选定文本? Below is the relevant part of my code.
以下是我的代码的相关部分。 Right now I select an item from the Spinner, but the TextView text doesn't change.
现在,我从微调器中选择了一个项目,但TextView文本没有改变。
public void onCreate(etc, etc...
{
Spinner spinner = (Spinner)findViewById(R.id.mySpinner);
List<String> myList = myClass.myList();
ArrayAdapter<String> myAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, myList);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(myAdapter);
SpinnerListener(spinner);
// Here I try to set the TextView text to the Spinner's selected text, but it doesn't work (the text doesn't change):
TextView tv= (TextView)findViewById(R.id.myTextView);
tv.setText(spinner.getSelectedItem().toString());
}
The Spinner Listener: 微调监听器:
private void SpinnerListener(Spinner spinner)
{
spinner.setOnItemSelectedListener(new mySelectedListener());
}
public class mySelectedListener implements OnItemSelectedListener {
@Override
public void onItemSelected(AdapterView parent, View view, int pos, long id) {
Toast.makeText(parent.getContext(), parent.getItemAtPosition(pos).toString(), Toast.LENGTH_SHORT).show();
}
@Override
public void onNothingSelected(AdapterView parent) {
}
}
You should move the tv.setText(spinner.getSelectedItem().toString());
您应该移动
tv.setText(spinner.getSelectedItem().toString());
from onCreate
to public void onItemSelected(...)
getting something like this: tv.setText(parent.getItemAtPosition(pos).toString())
. 从
onCreate
到public void onItemSelected(...)
得到这样的东西: tv.setText(parent.getItemAtPosition(pos).toString())
。 See if it works ! 看看是否有效!
The problem is, if you put your code on onCreate, it is only getting called on the first time your activity/fragment is created, thus is never gonna change if the user selects a item on the spinner. 问题是,如果将代码放在onCreate上,则只会在第一次创建活动/片段时调用它,因此,如果用户在微调器上选择一个项目,则永远不会改变。
use this example 使用这个例子
public class MainActivity extends Activity {
String[] text1 = { "SUNDAY", "MONDAY", "TUESDAY",
"WEDNESDAY", "THURSDAY", "FRIDAY", "SATURDAY" };
int[] val1 = { 0, 1, 2, 3, 4, 5, 6};
Spinner spinner1;
TextView textView1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView1 = (TextView)findViewById(R.id.text1);
spinner1 = (Spinner)findViewById(R.id.spinner1);
ArrayAdapter<String> adapter1 =
new ArrayAdapter<String>(MainActivity.this,
android.R.layout.simple_spinner_item, text1);
adapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner1.setAdapter(adapter1);
spinner1.setOnItemSelectedListener(onItemSelectedListener1);
}
OnItemSelectedListener onItemSelectedListener1 =
new OnItemSelectedListener(){
@Override
public void onItemSelected(AdapterView<?> parent, View view,
int position, long id) {
String s1 = String.valueOf(val1[position]);
textView1.setText(s1);
}
@Override
public void onNothingSelected(AdapterView<?> parent) {}
};
}
XML CODE XML代码
<Spinner
android:id="@+id/spinner1"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/text1"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
</LinearLayout>
TextView spinget= (TextView) findViewById(R.id.spinget);
Spinner destspin1= (Spinner) findViewById(R.id.destspin);
destspin1.setOnItemSelectedListener(this);
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
String s=destspin1.getSelectedItem().toString();
spinget.setText(s);
}
it will work 它会工作
Set TextView Text to Spinner Selected Item 将TextView文本设置为微调所选项目
Spinner xyzSPN=(Spinner)view.findViewById(R.id.spn_xyz_spn); Spinner xyzSPN =(Spinner)view.findViewById(R.id.spn_xyz_spn); TextView xyzTV=(Spinner)view.findViewById(R.id.spn_xyz_tv);
TextView xyzTV =(Spinner)view.findViewById(R.id.spn_xyz_tv);
// set listner on spinner and get selected text //在微调器上设置列表器并获取选定的文本
xyzSPN.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { @Override public void onItemSelected(AdapterView parentView, View selectedItemView, int position, long id) { xyzSPN.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener(){@Override public void onItemSelected(AdapterView parentView,View selectedItemView,int position,long id){
xyzTV.setText(xyzSPN.getSelectedItem().toString());
}
@Override
public void onNothingSelected(AdapterView<?> parentView) {
// your code here
}
});
}
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