我的代码正在运行,我在textview上获得了价值,但是在第一次点击时没有改变,假设我的微调器弹出,我选择其他值,而不是同时我的textview值没有改变它的变化下一次点击。
package com.vedicrishiastro.kundli.Screens.Extras;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.Spinner;
import android.widget.TextView;
import com.vedicrishiastro.kundli.R;
import com.vedicrishiastro.kundli.Screens.AbstractActivity;
public class Settings extends AbstractActivity implements View.OnClickListener {
private LinearLayout linearSelectLang,linearSetDefault,linearSelectPanch;
private TextView txtSelectLang,txtSetDefault,txtSelectPanch;
private Spinner spinner1,spinner2,spinner3;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_settings);
linearSelectLang = (LinearLayout)findViewById(R.id.LinearSelectLang);
linearSetDefault = (LinearLayout)findViewById(R.id.LinearSetDefault);
linearSelectPanch = (LinearLayout)findViewById(R.id.LinearSelectPanch);
spinner1 = (Spinner)findViewById(R.id.settingSpinner1);
spinner2 = (Spinner)findViewById(R.id.settingSpinner2);
spinner3 = (Spinner)findViewById(R.id.settingSpinner3);
txtSelectLang = (TextView)findViewById(R.id.selectLangtext);
txtSetDefault = (TextView)findViewById(R.id.setdefaulttext);
txtSelectPanch = (TextView)findViewById(R.id.selectPanchtext);
linearSelectLang.setOnClickListener(this);
linearSetDefault.setOnClickListener(this);
linearSelectPanch.setOnClickListener(this);
spinner1.setVisibility(View.GONE);
spinner2.setVisibility(View.GONE);
spinner3.setVisibility(View.GONE);
}
public void onClick(View view){
int id = view.getId();
switch (id){
case R.id.LinearSelectLang:
{
spinner1.performClick();
String text = spinner1.getSelectedItem().toString();
txtSelectLang.setText(text);
spinner1.setVisibility(View.GONE);
}
break;
case R.id.LinearSetDefault:
{
spinner2.performClick();
String text = spinner2.getSelectedItem().toString();
txtSetDefault.setText(text);
spinner2.setVisibility(View.GONE);
}
break;
case R.id.LinearSelectPanch:
{
spinner3.performClick();
String text = spinner3.getSelectedItem().toString();
txtSelectPanch.setText(text);
spinner3.setVisibility(View.GONE);
}
break;
}
}
}
我试过了,但它没有工作
case R.id.LinearSelectLang:
{
spinner1.performClick();
spinner1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
if (position == 0)
{
txtSelectLang.setText("English");
}
else
{
txtSelectLang.setText("हिंदी");
}
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
}
break;
答案 0 :(得分:1)
为 Spinner 创建 onItemSelectListener ,并在每次选择项目时更改文本。
spinner.setOnItemSelectedListener(new OnItemSelectListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int pos,long id) {
// DO it here
}
});
答案 1 :(得分:1)
你如何使用微调器的OnItemSelected
事件?
spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
// your code here
}
@Override
public void onNothingSelected(AdapterView<?> parentView) {
// your code here
}
});
事情是,如果你打电话给performClick
,微调器会弹出,但这个调用没有阻塞。因此,您需要OnItemSelectedListener
来获取用户输入的异步响应。
在getSelectedItem
(打开微调器?)之后立即调用performClick
将返回先前设置的元素 - 这是您正面临的错误。