Android的:如何从微调获得价值,并基于价值重定向到另一个页面 [英] Android: How to get value from Spinner, and based on value to redirect to another page
本文介绍了Android的:如何从微调获得价值,并基于价值重定向到另一个页面的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我是新来的机器人。我坚持了微调。有两个微调项FROM和TO。
我想code as..if我想要搜索PLACE1,要Place2。然后单击按钮后,如果条件匹配,它应该重定向到另一页。
在运行的应用程序,我没有得到任何错误,也没有反应出来点击按钮。
请参阅下面的code。我已经3路(*注释中),他们没有给出所需的输出试过这件事情。
包com.aricent.aricentgroupapps;进口android.app.Activity;
进口android.content.Intent;
进口android.os.Bundle;
进口android.view.Menu;
进口android.view.View;
进口android.widget.Button;
进口android.widget.Spinner;
公共类SelectLocation延伸活动{ @覆盖
保护无效的onCreate(捆绑savedInstanceState){ super.onCreate(savedInstanceState);
的setContentView(R.layout.activity_select_location);
按钮路线=(按钮)findViewById(R.id.RouteButton);
最后的微调SPIN1 =(微调)findViewById(R.id.fromdropdrown);
最后的微调spin2 =(微调)findViewById(R.id.todropdrown); route.setOnClickListener(新View.OnClickListener(){ @覆盖
公共无效的onClick(查看为arg0){
// TODO自动生成方法存根
。字符串STR1 = spin1.getSelectedItem()的toString();
。字符串STR2 = spin2.getSelectedItem()的toString();
字符串plot31 =情节31;
字符串plot314 =314地块;
/ *如果(将String.valueOf(spin1.getSelectedItem())==情节17&放大器;&安培;将String.valueOf(spin2.getSelectedItem())==情节16)
{
意图I =新意图(SelectLocation.this,Route1.class);
startActivity(ⅰ);
}
如果(spin1.equals(不积17)及和放大器; spin2.equals(不积16))
{
意图I =新意图(SelectLocation.this,Route1.class);
startActivity(ⅰ);
}
* / 如果(STR1 == plot31&放大器;&安培; STR2 == plot314)
{
意图I =新意图(SelectLocation.this,Route1.class);
startActivity(ⅰ); }
}
}); } 保护字符串的valueOf(对象将selectedItem){
// TODO自动生成方法存根
返回的getString(0);
} @覆盖
公共布尔onCreateOptionsMenu(菜单菜单){
//充气菜单;如果是present这增加了项目操作栏。
。getMenuInflater()膨胀(R.menu.select_location,菜单);
返回true;
}}
解决方案
使用这个
spinner.setOnItemSelectedListener(新Spinner.OnItemSelectedListener(){
@覆盖
公共无效onItemSelected(适配器视图<>主,查看视图,INT位置,
长标识){
如果(位置== 0){
//你的code
}
如果(位置== 1){
//你的code
}
}
}
I am new to android. I am stuck with the spinner. There are two spinner item "FROM" and "TO". I want to code as..if I want to search FROM Place1, To Place2. Then after clicking button, if condition matches, it should redirect to another page. While running app, I am not getting any error, and no response comes out of clicking button.
Please see the below code. I have tried this thing by 3 way (*in comments), none of them gives desired output.
package com.aricent.aricentgroupapps;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.Spinner;
public class SelectLocation extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_select_location);
Button route = (Button) findViewById(R.id.RouteButton);
final Spinner spin1 = (Spinner) findViewById(R.id.fromdropdrown);
final Spinner spin2 = (Spinner) findViewById(R.id.todropdrown);
route.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
String str1 = spin1.getSelectedItem().toString();
String str2 = spin2.getSelectedItem().toString();
String plot31= "Plot 31";
String plot314= "Plot 314";
/* if(String.valueOf(spin1.getSelectedItem())== "Plot 17" && String.valueOf(spin2.getSelectedItem())== "Plot 16")
{
Intent i = new Intent(SelectLocation.this, Route1.class);
startActivity(i);
}
if (spin1.equals("Plot 17") && spin2.equals("Plot 16"))
{
Intent i = new Intent(SelectLocation.this, Route1.class);
startActivity(i);
}
*/
if (str1== plot31 && str2==plot314)
{
Intent i = new Intent(SelectLocation.this, Route1.class);
startActivity(i);
}
}
});
}
protected String valueOf(Object selectedItem) {
// TODO Auto-generated method stub
return getString(0);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.select_location, menu);
return true;
}
}
解决方案
use this one
spinner.setOnItemSelectedListener(new Spinner.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> main, View view, int position,
long Id) {
if(position==0){
//your code
}
if(position==1){
//your code
}
}
}
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