Android練習——Spinner二級連動_都市の選択
21651 ワード
スタイル部分xml
1 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
2 xmlns:tools="http://schemas.android.com/tools"
3 android:layout_width="match_parent"
4 android:layout_height="match_parent"
5 android:paddingBottom="@dimen/activity_vertical_margin"
6 android:paddingLeft="@dimen/activity_horizontal_margin"
7 android:paddingRight="@dimen/activity_horizontal_margin"
8 android:paddingTop="@dimen/activity_vertical_margin"
9 tools:context=".MainActivity" >
10
11 <TextView
12 android:id="@+id/textView1"
13 android:layout_width="wrap_content"
14 android:layout_height="wrap_content"
15 android:text=" " />
16
17 <Spinner
18 android:id="@+id/spinner1"
19 android:layout_width="wrap_content"
20 android:layout_height="wrap_content"
21 android:layout_alignLeft="@+id/textView1"
22 android:layout_below="@+id/textView1" />
23
24 <Spinner
25 android:id="@+id/spinner2"
26 android:layout_width="wrap_content"
27 android:layout_height="wrap_content"
28 android:layout_alignLeft="@+id/spinner1"
29 android:layout_below="@+id/spinner1" />
30
31 </RelativeLayout> 1 <?xml version="1.0" encoding="utf-8"?>
2 <resources>
3 <string-array name="province">
4 <item>- -</item>
5 <item> </item>
6 <item> </item>
7 </string-array>
8 <string-array name="hb">
9 <item>- -</item>
10 <item> </item>
11 <item> </item>
12 <item> </item>
13 <item> </item>
14 <item> </item>
15 </string-array>
16 <string-array name="bj">
17 <item>- -</item>
18 <item> </item>
19 <item> </item>
20 <item> </item>
21 <item> </item>
22 </string-array>
23 </resources> 1 package com.example.android_spinner;
2
3 import android.os.Bundle;
4 import android.app.Activity;
5 import android.view.Menu;
6 import android.view.View;
7 import android.widget.AdapterView;
8 import android.widget.ArrayAdapter;
9 import android.widget.Spinner;
10
11 public class MainActivity extends Activity {
12 //
13 private Spinner sr1;
14 private Spinner sr2;
15
16 @Override
17 protected void onCreate(Bundle savedInstanceState) {
18 super.onCreate(savedInstanceState);
19 setContentView(R.layout.activity_main);
20 //
21 sr1 = (Spinner) this.findViewById(R.id.spinner1);
22 sr2 = (Spinner) this.findViewById(R.id.spinner2);
23 // String
24 String[] province = getResources().getStringArray(R.array.province);
25 ;
26 //
27 // ArrayAdapter<CharSequence> aa = new ArrayAdapter<CharSequence>(this,
28 // android.R.layout.simple_spinner_item,province);
29
30 // xml
31 ArrayAdapter<CharSequence> aa = ArrayAdapter.createFromResource(this,
32 R.array.province, android.R.layout.simple_spinner_item);
33
34 //
35 aa.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
36 // spinner
37 sr1.setAdapter(aa);
38
39 //
40
41 sr1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
42
43 @Override
44 public void onItemSelected(AdapterView<?> arg0, View arg1,
45 int arg2, long arg3) {
46 //
47 Spinner s = (Spinner) arg0;
48 String pro = (String) s.getItemAtPosition(arg2);
49 ArrayAdapter<CharSequence> cityAdapter = null;
50 // ( )
51 if (pro.equals(" ")) {
52
53 cityAdapter = ArrayAdapter.createFromResource(
54 MainActivity.this, R.array.hb,
55 android.R.layout.simple_spinner_item);
56 } else if (pro.equals(" ")) {
57
58 cityAdapter = ArrayAdapter.createFromResource(
59 MainActivity.this, R.array.bj,
60 android.R.layout.simple_spinner_item);
61 }
62 sr2.setAdapter(cityAdapter);
63 }
64
65 @Override
66 public void onNothingSelected(AdapterView<?> arg0) {
67 // TODO Auto-generated method stub
68
69 }
70
71 });
72
73 }
74
75 @Override
76 public boolean onCreateOptionsMenu(Menu menu) {
77 // Inflate the menu; this adds items to the action bar if it is present.
78 getMenuInflater().inflate(R.menu.main, menu);
79 return true;
80 }
81
82 }