Android Spinner(级联 天气预报）
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内容图文
activity_spinner.xml
<?
xml version="1.0" encoding="utf-8"
?>
<
LinearLayout
xmlns:android
="http://schemas.android.com/apk/res/android"
android:layout_width
="match_parent"
android:layout_height
="match_parent"
android:orientation
="vertical"
>
<
Spinner
android:id
="@+id/spinner1"
android:layout_width
="match_parent"
android:layout_height
="wrap_content"
/>
<
Spinner
android:id
="@+id/spinner2"
android:layout_width
="match_parent"
android:layout_height
="wrap_content"
/>
<
Spinner
android:id
="@+id/spinner3"
android:layout_width
="match_parent"
android:layout_height
="wrap_content"
/>
<
TextView
android:id
="@+id/textView1"
android:layout_width
="match_parent"
android:layout_height
="wrap_content"
android:text
="TextView"
/>
</
LinearLayout
>
SpinnerActivity.java
package
com.wangzhu.demospinner;
import
java.io.BufferedReader;
import
java.io.IOException;
import
java.io.InputStream;
import
java.io.InputStreamReader;
import
java.net.HttpURLConnection;
import
java.net.MalformedURLException;
import
java.net.URL;
import
java.util.ArrayList;
import
java.util.List;
import
android.app.Activity;
import
android.app.ProgressDialog;
import
android.os.Bundle;
import
android.os.Handler;
import
android.os.Message;
import
android.util.Log;
import
android.view.View;
import
android.widget.AdapterView;
import
android.widget.ArrayAdapter;
import
android.widget.Spinner;
import
android.widget.TextView;
public
class SpinnerActivity extends Activity {
private Spinner spinner1, spinner2, spinner3;
private TextView textView1;
private ArrayAdapter<String> adapter1, adapter2, adapter3;
private List<String> listData1, listData2, listData3;
private ProgressDialog dialog;
private String downloadData;
private MyThread myThread1, myThread2, myThread3, myThread4, myThread5;
private MyHandler myHandler;
private String preUri = "http://m.weather.com.cn/data";
private String uri;
@Override
protectedvoid onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_spinner);
textView1 = (TextView) findViewById(R.id.textView1);
listData1 = new ArrayList<String>();
listData2 = new ArrayList<String>();
listData3 = new ArrayList<String>();
adapter1 = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, listData1);
adapter2 = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, listData2);
adapter3 = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, listData3);
spinner1 = (Spinner) findViewById(R.id.spinner1);
spinner1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
publicvoid onItemSelected(AdapterView<?> parent, View view,
int position, long id) {
Log.d("TAG", "spinner1 " + position + "=====" + id);
uri = preUri + String.format("5/city%02d", position + 1)
+ ".xml";
init2();
}
@Override
publicvoid onNothingSelected(AdapterView<?> parent) {
}
});
spinner1.setAdapter(adapter1);
spinner2 = (Spinner) findViewById(R.id.spinner2);
spinner2.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
publicvoid onItemSelected(AdapterView<?> parent, View view,
int position, long id) {
Log.d("TAG", "spinner2 " + position + "=====" + id);
uri = preUri
+ String.format("5/city%02d",
spinner1.getSelectedItemId() + 1)
+ String.format("%02d", position + 1) + ".xml";
init3();
}
@Override
publicvoid onNothingSelected(AdapterView<?> parent) {
}
});
spinner2.setAdapter(adapter2);
spinner3 = (Spinner) findViewById(R.id.spinner3);
spinner3.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
publicvoid onItemSelected(AdapterView<?> parent, View view,
int position, long id) {
Log.d("TAG", "spinner3 " + position + "=====" + id);
uri = preUri
+ String.format("5/city%02d",
spinner1.getSelectedItemId() + 1)
+ String.format("%02d",
spinner2.getSelectedItemId() + 1)
+ String.format("%02d", position + 1) + ".xml";
init4();
}
@Override
publicvoid onNothingSelected(AdapterView<?> parent) {
}
});
spinner3.setAdapter(adapter3);
myHandler = new MyHandler();
myThread1 = new MyThread(1);
myThread2 = new MyThread(2);
myThread3 = new MyThread(3);
myThread4 = new MyThread(4);
myThread5 = new MyThread(5);
init1();
}
privatevoid init1() {
showDialog("温馨提示", "正在加载第一级目录，请稍候。。。");
uri = "http://m.weather.com.cn/data5/city.xml";
new Thread(myThread1).start();
}
privatevoid init2() {
showDialog("温馨提示", "正在更新第二级目录，请稍候。。。");
new Thread(myThread2).start();
}
privatevoid init3() {
showDialog("温馨提示", "正在更新第三季目录，请稍后。。。");
new Thread(myThread3).start();
}
privatevoid init4() {
showDialog("温馨提示", "正在更新天气，请稍候。。。");
new Thread(myThread4).start();
}
privatevoid init5() {
showDialog("温馨提示", "正在更新天气，请稍候。。。");
new Thread(myThread5).start();
}
privatevoid showDialog(String title, String msg) {
dialog = new ProgressDialog(SpinnerActivity.this);
dialog.setTitle(title);
dialog.setMessage(msg);
dialog.show();
}
privatevoid download(String uri) {
downloadData = null;
try {
URL url = new URL(uri);
// 使用HttpURLConnection打开连接
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(2000);
conn.setUseCaches(false);
if (HttpURLConnection.HTTP_OK == conn.getResponseCode()) {
InputStream in = conn.getInputStream();
BufferedReader reader = new BufferedReader(
new InputStreamReader(in));
StringBuffer result = new StringBuffer();
String readLine = null;
while ((readLine = reader.readLine()) != null) {
result.append(readLine);
}
// 关闭InputStream in.close();
// 关闭http连接 conn.disconnect();
downloadData = result.toString();
}
} catch (MalformedURLException e) {
// TODO Auto-generated catch block e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block e.printStackTrace();
}
}
class MyThread implements Runnable {
privateint flag;
public MyThread(int flag) {
this.flag = flag;
}
@Override
publicvoid run() {
// Looper.prepare(); download(uri);
myHandler.sendEmptyMessage(flag);
}
}
class MyHandler extends Handler {
@Override
publicvoid handleMessage(Message msg) {
super.handleMessage(msg);
Log.d("TAG", uri);
switch (msg.what) {
case 1:
if (null != downloadData) {
Log.d("TAG", downloadData);
String[] dataArr = downloadData.split(",");
for (int i = 0, len = dataArr.length; i < len; i++) {
listData1.add(dataArr[i].substring(3));
}
// adapter1.notifyDataSetChanged();
adapter1 = new ArrayAdapter<String>(SpinnerActivity.this,
android.R.layout.simple_spinner_item, listData1);
adapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner1.setAdapter(adapter1);
}
break;
case 2:
if (null != downloadData) {
Log.d("TAG", downloadData);
String[] dataArr = downloadData.split(",");
listData2.clear();
for (int i = 0, len = dataArr.length; i < len; i++) {
listData2.add(dataArr[i].substring(5));
}
// adapter2.notifyDataSetChanged();
adapter2 = new ArrayAdapter<String>(SpinnerActivity.this,
android.R.layout.simple_spinner_item, listData2);
adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner2.setAdapter(adapter2);
}
break;
case 3:
if (null != downloadData) {
Log.d("TAG", downloadData);
String[] dataArr = downloadData.split(",");
listData3.clear();
for (int i = 0, len = dataArr.length; i < len; i++) {
listData3.add(dataArr[i].substring(7));
}
// adapter3.notifyDataSetChanged();
adapter3 = new ArrayAdapter<String>(SpinnerActivity.this,
android.R.layout.simple_spinner_item, listData3);
adapter3.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner3.setAdapter(adapter3);
}
break;
case 4:
if (null != downloadData) {
Log.d("TAG", downloadData);
dialog.dismiss();
uri = preUri + "/" + downloadData.substring(7) + ".html";
init5();
}
break;
case 5:
if (null != downloadData) {
Log.d("TAG", downloadData);
textView1.setText(downloadData);
}
break;
}
dialog.dismiss();
}
}
}
原文：http://www.cnblogs.com/xiaoxian1369/p/3705254.html
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