Android's spinner Pull-down menu implements cascading _android

The effect chart is as follows:

The default load is the first time

Select the original queue:

Cascading Effect Chart:

Critical code to the Drop-down list select event Listener binding ID:

Copy Code code as follows:

int pos = Firsthand_dlbh_pinner.getselecteditemposition ();
Firsthand_pdbh_adapter = new Arrayadapter<string> (context,
Android. R.layout.simple_spinner_item, Queu_info[pos]);
Firsthand_pdbh_spinner.setadapter (Firsthand_pdbh_adapter);

Complete code:

Layout file Code:

Copy Code code as follows:

<?xml version= "1.0" encoding= "Utf-8"?>
<linearlayout xmlns:android= "Http://schemas.android.com/apk/res/android"
Android:layout_width= "Fill_parent"
android:layout_height= "Fill_parent"
android:orientation= "Vertical" >

<textview
Android:id= "@+id/firsthand_dlbh"
Android:layout_width= "Fill_parent"
android:layout_height= "Wrap_content"
android:layout_marginleft= "60SP"
android:layout_margintop= "20SP" >
</TextView>

    <spinner
        android:id= "@+id/firsthand_dlbh_ Pinner "
        android:layout_width=" 200SP
         android:layout_height= "Wrap_content"
        android: layout_marginleft= "60SP"
        android:layout_margintop= "20SP"
    </spinner>

    <textview
         android:id= "@+id/firsthand_pdbh"
        android:layout_width = "Fill_parent"
        android:layout_height= "wrap_content"
         android:layout_marginleft= "60SP"
         android:layout_margintop= "20sp"
    </textview>

<spinner
Android:id= "@+id/firsthand_pdbh_pinner"
Android:layout_width= "200SP"
android:layout_height= "Wrap_content"
android:layout_marginleft= "60SP"
android:layout_margintop= "20SP" >
</Spinner>

<textview
Android:id= "@+id/target_dlbh"
Android:layout_width= "Fill_parent"
android:layout_height= "Wrap_content"
android:layout_marginleft= "60SP"
android:layout_margintop= "20SP" >
</TextView>

    <spinner
        android:id= "@+id/target_dlbh_ Spinner "
        android:layout_width=" 200SP
         android:layout_height= "Wrap_content"
        android: layout_marginleft= "60SP"
        android:layout_margintop= "20SP"
    </spinner>

<button
Android:id= "@+id/diff_manage_operation"
Android:layout_width= "Wrap_content"
android:layout_height= "Wrap_content"
android:layout_marginleft= "100SP"
android:layout_margintop= "20SP"
android:text= "Execution Schedule"
Android:textsize= "18SP" >
</Button>

</LinearLayout>

JAVA Program code:

Copy Code code as follows:

Import android.app.Activity;
Import Android.content.Context;

Import Android.os.Bundle;

Import Android.view.Menu;
Import Android.view.View;
Import Android.view.View.OnClickListener;
Import Android.widget.AdapterView;
Import Android.widget.ArrayAdapter;
Import Android.widget.Button;
Import Android.widget.Spinner;
Import Android.widget.TextView;
Import Android.widget.AdapterView.OnItemSelectedListener;

Public class Manageinfo_activity extends activity implements Onclicklistener {
 private context;
 private static final string[] Queuilist = {"A999", "B888"};
 private static final string[] Default_linfo = {"A01", "A02", "A03", "A04",
    "A05", "A06", " A07 "," A08 "," A09 "," A10 "," A11 "};
 private static final string[][] Queu_info = new string[][] {
   {"A01", "A02", "A03", "A04", "A05", "A06", "A07", "A08", "A09",
      "A10", "A11"},
   {"B01", "B02 "," B03 "," B04 "," B05 "," B06 "," B07 "," B08 "," B09 ",
     " B10 "," B11 "};
 private TextView Firsthand_dlbh_view;
 private Spinner Firsthand_dlbh_pinner;
 private arrayadapter<string> firsthand_dlbh_adapter;

Private TextView Firsthand_pdbh_view;
Private Spinner Firsthand_pdbh_spinner;
Private arrayadapter<string> Firsthand_pdbh_adapter;

Private TextView Target_dlbh_view;
Private Spinner Target_dlbh_spinner;
Private arrayadapter<string> Target_dlbh_adapter;

Private String firsthand_dlbh = "";
Private String FIRSTHAND_PDBH = "";
Private String target_dlbh = "";

@Override
protected void OnCreate (Bundle savedinstancestate) {
TODO auto-generated Method Stub
Super.oncreate (savedinstancestate);
Setcontentview (R.layout.activity_manageinfo);

context = this;

  //defines the original queue number Drop-down menu
  firsthand_dlbh_view = (TextView) Findviewbyid (R.ID.FIRSTHAND_DLBH);
  firsthand_dlbh_pinner = (Spinner) Findviewbyid (R.id.firsthand_dlbh_pinner);
  //connect the optional content to arrayadapter
  firsthand_dlbh_adapter = new Arrayadapter<string> ( This,
    android. R.layout.simple_spinner_item, queuilist);
  //Sets the style of the Drop-down list
  firsthand_dlbh_adapter
    . Setdropdownviewresource (Android. R.layout.simple_spinner_dropdown_item);
  //Add adapter to spinner
  firsthand_dlbh_pinner.setadapter (firsthand_dlbh_adapter);
  //Add an event spinner event to listen for
  firsthand_dlbh_pinner
    . Setonitemselectedlistener (New Firsthanddlbhspinnerselectedlistener ());
  //Sets the default value
  firsthand_dlbh_pinner.setvisibility (view.visible);

  //defines the original queued numbering drop-down menu
  firsthand_pdbh_view = (TextView) Findviewbyid (R.ID.FIRSTHAND_PDBH);
  firsthand_pdbh_spinner = (spinner) Findviewbyid (R.id.firsthand_pdbh_pinner);
  //connect the optional content to arrayadapter
  firsthand_pdbh_adapter = new Arrayadapter<string> ( This,
    android. R.layout.simple_spinner_item, Default_linfo);
  //Sets the style of the Drop-down list
  firsthand_pdbh_adapter
    . Setdropdownviewresource (Android. R.layout.simple_spinner_dropdown_item);
  //Add adapter to spinner
  firsthand_pdbh_spinner.setadapter (Firsthand_pdbh_adapter) ;
  //Add event Spinner Event listener
  firsthand_pdbh_spinner
    . Setonitemselectedlistener (New Firsthandpdbhspinnerselectedlistener ());
  //Sets the default value
  firsthand_pdbh_spinner.setvisibility (view.visible);

  //defines the destination queue drop-down menu
  target_dlbh_view = (TextView) Findviewbyid (R.ID.TARGET_DLBH);
  target_dlbh_spinner = (spinner) Findviewbyid (R.id.target_dlbh_spinner);
  //connect the optional content to arrayadapter
  target_dlbh_adapter = new Arrayadapter<string> (this ,
    android. R.layout.simple_spinner_item, queuilist);
  //Sets the style of the Drop-down list
  target_dlbh_adapter
    . Setdropdownviewresource (Android. R.layout.simple_spinner_dropdown_item);
  //Add adapter to spinner
  target_dlbh_spinner.setadapter (target_dlbh_adapter);
  //Add an event spinner event to listen for
  target_dlbh_spinner
    . Setonitemselectedlistener (New Targetdlbhpinnerselectedlistener ());
  //Sets the default value
  target_dlbh_spinner.setvisibility (view.visible);

Button diff_manage_operation = (button) Findviewbyid (r.id.diff_manage_operation);
Diff_manage_operation.setonclicklistener (this);

}

Select target Queue number event listener
Class Firsthanddlbhspinnerselectedlistener Implements
Onitemselectedlistener {

public void onitemselected (adapterview<?> arg0, View arg1, int arg2,
Long Arg3) {
FIRSTHAND_DLBH = Queuilist[arg2];
Firsthand_dlbh_view.settext ("Select the original queue is:" + queuilist[arg2]);
int pos = Firsthand_dlbh_pinner.getselecteditemposition ();
Firsthand_pdbh_adapter = new Arrayadapter<string> (context,
Android. R.layout.simple_spinner_item, Queu_info[pos]);
Firsthand_pdbh_spinner.setadapter (Firsthand_pdbh_adapter);

}

public void onnothingselected (adapterview<?> arg0) {
}
}

Select target Queue number event listener
Class Firsthandpdbhspinnerselectedlistener Implements
Onitemselectedlistener {

public void onitemselected (adapterview<?> arg0, View arg1, int arg2,
Long Arg3) {
FIRSTHAND_PDBH = (String) firsthand_pdbh_spinner
. Getitematposition (ARG2);
Firsthand_pdbh_view.settext ("The queue number to move is:"
+ (String) firsthand_pdbh_spinner.getitematposition (arg2));
}

public void onnothingselected (adapterview<?> arg0) {
}
}

Select reference Queue number Event listener
Class Targetdlbhpinnerselectedlistener implements Onitemselectedlistener {

public void onitemselected (adapterview<?> arg0, View arg1, int arg2,
Long Arg3) {
TARGET_DLBH = Queuilist[arg2];
Target_dlbh_view.settext ("Move to" + Queuilist[arg2] + "queue");
}

public void onnothingselected (adapterview<?> arg0) {
}
}

@Override
public void OnClick (View v) {

System.out.println ("Into the same queue scheduling link");

System.out.println ("Execute the queue number" + Firsthand_pdbh + "from" + firsthand_dlbh
+ "Move to" + TARGET_DLBH + "End of queue operation");
Diffmangerquening (user_name, Estination_code, FIRSTHAND_DLBH, FIRSTHAND_DLBH,TARGET_DLBH); Switch (V.getid ()) {//Click on a different button, pop-up corresponding prompts

}

@Override
public boolean Oncreateoptionsmenu (Menu menu) {
Inflate the menu; This adds items to the action bar if it is present.
Getmenuinflater (). Inflate (R.menu.activity_main, menu);
return true;
}
}