在不同的微调器选项上显示不同的图像

Question

我是Android开发的新手，我正在尝试创建一个包含Spinner（3个条目）的simple application 。

我的目标是to show a different image for each spinner that is selected 。

在一些教程的帮助下，我设法获得了以下代码，但是我不知道如何将图像绑定到微调器条目。

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

<LinearLayout android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >
<Spinner
    android:id="@+id/spinner1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:entries="@array/Stockwerk"/>

<ImageView
    android:id="@+id/imageView1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:contentDescription="Plan der 8. Etage"
    />
</LinearLayout>
</RelativeLayout>

main_activity.java

package com.example.raumplan;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.Spinner;

public class MainActivity extends Activity {

private Spinner spinner;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    addListenerOnSpinnerItemSelection();
}


public void addListenerOnSpinnerItemSelection() {
    spinner = (Spinner) findViewById(R.id.spinner1);
    spinner.setOnItemSelectedListener(new CustomOnItemSelectedListener());

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

}

CustomOnItemSelectedListener.java

package com.example.raumplan;

import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ImageView;
import android.widget.Toast;

public class CustomOnItemSelectedListener implements OnItemSelectedListener {

  public void onItemSelected(AdapterView<?> parent, View view, int pos,long id) {
Toast.makeText(parent.getContext(), 
    parent.getItemAtPosition(pos).toString()+" ausgewählt",
    Toast.LENGTH_SHORT).show();


  }

  @Override
  public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
  }

}

我非常感谢你们的帮助：D谢谢

编辑：感谢您的帮助。 我尝试添加以下内容，但我不知道该用“ urImageView”替换什么。

switch (pos) {
    case 0:
        urImageView.setImageResource(R.drawable.x);
        break;
    case 1:
        urImageView.setImageResource(R.drawable.y);         
        break;
    case 2:
        urImageView.setImageResource(R.drawable.z);         
        break;
    default:
        break;
}

在我的activity_main.xml中，

<ImageView
    android:id="@+id/imageView1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:contentDescription="Plan der 8. Etage"
    />
<ImageView
    android:id="@+id/imageView2"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:contentDescription="Plan der 7. Etage"
    />
<ImageView
    android:id="@+id/imageView3"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:contentDescription="Plan der 6. Etage"
    />

Answer 1

您可以简单地在onItemSelected()添加switch语句

public void onItemSelected(AdapterView<?> parent, View view, int pos,long id) {
    Toast.makeText(parent.getContext(), 
    parent.getItemAtPosition(pos).toString() + " ausgewählt", Toast.LENGTH_SHORT).show();

    switch (pos) {
        case 0:
           break;
        default:
           break;
    }
}

Answer 2

有一些步骤可以创建带有文本和图像的微调框。

Steps :
  1.  Create Model (SpinnerModel.java) to store data for each spinner row.
  2.  Create a ArrayList to store Model (SpinnerModel.java) objects.
  3.  Store data in Models and Store Model objects in Arraylist.
  4.  Pass Model object Arraylist to custom adapter.
  5.  Custom Adapter use Arraylist data (Model Objects) and create rows for Spinner.
  6.  Create listener for Spinner and show spinner item selected values on activity.


This link given below will help you.

带有图像和文本的自定义微调器

Answer 3

您还可以使用其他条件来选择显示多个图像。 这样的事情。

spinner = (Spinner) findViewById(R.id.spinner1);
imageview = (ImageView) findViewById(R.id.imageView1);

spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
    //spinner.
    @Override
    public void onItemSelected(AdapterView<?> arg0, View arg1,
                               int arg2, long arg3) {
        if(arg2==0)
        {
            imageview.setImageResource(R.drawable.apple);
        }
        else if(arg2==1)
        {
            imageview.setImageResource(R.drawable.microsoft);
        }
        else
        {
            imageview.setImageResource(R.drawable.google);
        }