Question

我是Android开发的新手，我正在尝试创建simple application包括微调器（3个条目）。

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，但我不知道如何将图像绑定到微调器条目。

activity_main.xml中

<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
  }

}

我真的很感谢你们的帮助：D 谢谢

编辑：谢谢你的帮助。我试着添加以下内容，但我不知道，用什么来代替“urImageView”。

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，我有

<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

您只需在switch

中添加onItemSelected()语句即可

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

使用text和Image创建微调器有一些步骤。

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.

Custom Spinner With Image And Text

Answer 3

您还可以使用if else条件在selction上使用show multiple image。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);
        }

在不同的微调器选择上显示不同的图像

3 个答案: