csv から gps ポイントを収集し、ジオポイントのリストを作成して、マップにオーバーレイとして追加できるようにする必要があります。そこで、リサイクルするゴミの種類に応じて関連するすべてのポイントを収集するこのコードを思いつきました。これを読み込もうとするとエラーが発生します (または、私が間違っていてエラーが関連していない場合は、教えてください):
recycleType = 3 (電池) を検討してください。
public ArrayList<GeoPoint> csvToGeoPoints(int recycleType) {
String csvString = null;
URL myurl = null;
HttpURLConnection urlConn;
InputStreamReader inStream = null;
BufferedReader buff = null;
try {
myurl = new URL("http://www.tel-aviv.gov.il/OnlineServices/DataTLV/Documents/%D7%A2%D7%99%D7%A8%D7%99%D7%99%D7%AA%20%D7%AA%D7%9C-%D7%90%D7%91%D7%99%D7%91-%D7%99%D7%A4%D7%95%20-%20%D7%A4%D7%A8%D7%99%D7%A1%D7%AA%20%D7%9E%D7%99%D7%9B%D7%9C%D7%99%20%D7%9E%D7%97%D7%96%D7%95%D7%A8.csv");
//urlConn = myurl.openConnection();
urlConn = (HttpURLConnection) myurl.openConnection();
inStream = new InputStreamReader(urlConn.getInputStream());
buff = new BufferedReader(inStream);
while ((csvString = buff.readLine()) != null) {
String[] elements = csvString.split(","); // getting the objects out of the csv's line
int lineLen = elements.length; // for later checking that line is not corrupted
if (lineLen == 14) { // making sure that line actually contains 14 objects. otherwise, skipping it
for (int i=0;i < lineLen;i++) { // for each line in csv file
int currentRecycleType = Integer.getInteger(elements[6]); // checking the type of recycling chosen by user
if (recycleType == currentRecycleType) { // only if this line has the user's choice, collecting the item
int lon = Integer.getInteger(elements[10])*1000000;
int lat = Integer.getInteger(elements[11])*1000000;
GeoPoint currentPoint = new GeoPoint(lon,lat);
myPoints.add(currentPoint); // adding all the points together :)
}
}
}
}
} catch (MalformedURLException e) {
//System.out.println("Please check the spelling of the url: "+ e.toString());
// pop up a window with error
AlertDialog alertDialog = new AlertDialog.Builder(this).create();
alertDialog.setTitle("Reset...");
alertDialog.setMessage("Error: " + e.toString());
//alertDialog.setButton("OK", null);
//alertDialog.setIcon(R.drawable.icon);
alertDialog.show();
} catch (IOException e1) {
//System.out.println("Can't read from the Internet: " + e1.toString());
// pop up a window with error
AlertDialog alertDialog = new AlertDialog.Builder(this).create();
alertDialog.setTitle("Reset...");
alertDialog.setMessage("Error: " + e1.toString());
//alertDialog.setButton("OK", null);
//alertDialog.setIcon(R.drawable.icon);
alertDialog.show();
}
finally {
try {
inStream.close();
buff.close();
} catch (Exception e) {
AlertDialog alertDialog = new AlertDialog.Builder(this).create();
alertDialog.setTitle("error");
alertDialog.setMessage("Error: " + e.toString());
//alertDialog.setButton("OK", null);
//alertDialog.setIcon(R.drawable.icon);
alertDialog.show();
//e.printStackTrace();
}
}
return myPoints;
}
私が得るエラーメッセージは次のとおりです。
11-14 22:54:25.700: E/Trace(733): error opening trace file: No such file or directory (2)
11-14 22:54:26.620: D/dalvikvm(733): GC_CONCURRENT freed 178K, 3% free 8268K/8519K, paused 32ms+15ms, total 136ms
11-14 22:54:26.620: D/dalvikvm(733): WAIT_FOR_CONCURRENT_GC blocked 53ms
11-14 22:54:26.630: W/CursorWrapperInner(733): Cursor finalized without prior close()
11-14 22:54:26.630: W/CursorWrapperInner(733): Cursor finalized without prior close()
11-14 22:54:26.959: D/dalvikvm(733): GC_CONCURRENT freed 27K, 2% free 8675K/8839K, paused 28ms+29ms, total 122ms
11-14 22:54:26.980: D/AndroidRuntime(733): Shutting down VM
11-14 22:54:26.990: W/dalvikvm(733): threadid=1: thread exiting with uncaught exception (group=0x40a13300)
11-14 22:54:27.010: E/AndroidRuntime(733): FATAL EXCEPTION: main
11-14 22:54:27.010: E/AndroidRuntime(733): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.recycletelaviv/com.example.recycletelaviv.ChooseRecycle}: android.os.NetworkOnMainThreadException
11-14 22:54:27.010: E/AndroidRuntime(733): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
11-14 22:54:27.010: E/AndroidRuntime(733): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
11-14 22:54:27.010: E/AndroidRuntime(733): at android.app.ActivityThread.access$600(ActivityThread.java:130)
11-14 22:54:27.010: E/AndroidRuntime(733): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
11-14 22:54:27.010: E/AndroidRuntime(733): at android.os.Handler.dispatchMessage(Handler.java:99)
11-14 22:54:27.010: E/AndroidRuntime(733): at android.os.Looper.loop(Looper.java:137)
11-14 22:54:27.010: E/AndroidRuntime(733): at android.app.ActivityThread.main(ActivityThread.java:4745)
11-14 22:54:27.010: E/AndroidRuntime(733): at java.lang.reflect.Method.invokeNative(Native Method)
11-14 22:54:27.010: E/AndroidRuntime(733): at java.lang.reflect.Method.invoke(Method.java:511)
11-14 22:54:27.010: E/AndroidRuntime(733): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
11-14 22:54:27.010: E/AndroidRuntime(733): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
11-14 22:54:27.010: E/AndroidRuntime(733): at dalvik.system.NativeStart.main(Native Method)
11-14 22:54:27.010: E/AndroidRuntime(733): Caused by: android.os.NetworkOnMainThreadException
11-14 22:54:27.010: E/AndroidRuntime(733): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
11-14 22:54:27.010: E/AndroidRuntime(733): at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
11-14 22:54:27.010: E/AndroidRuntime(733): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
11-14 22:54:27.010: E/AndroidRuntime(733): at java.net.InetAddress.getAllByName(InetAddress.java:214)
11-14 22:54:27.010: E/AndroidRuntime(733): at libcore.net.http.HttpConnection.<init>(HttpConnection.java:70)
11-14 22:54:27.010: E/AndroidRuntime(733): at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
11-14 22:54:27.010: E/AndroidRuntime(733): at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:341)
11-14 22:54:27.010: E/AndroidRuntime(733): at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:87)
11-14 22:54:27.010: E/AndroidRuntime(733): at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
11-14 22:54:27.010: E/AndroidRuntime(733): at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:315)
11-14 22:54:27.010: E/AndroidRuntime(733): at libcore.net.http.HttpEngine.connect(HttpEngine.java:310)
11-14 22:54:27.010: E/AndroidRuntime(733): at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:289)
11-14 22:54:27.010: E/AndroidRuntime(733): at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:239)
11-14 22:54:27.010: E/AndroidRuntime(733): at libcore.net.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:273)
11-14 22:54:27.010: E/AndroidRuntime(733): at libcore.net.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:168)
11-14 22:54:27.010: E/AndroidRuntime(733): at com.example.recycletelaviv.ChooseRecycle.csvToGeoPoints(ChooseRecycle.java:126)
11-14 22:54:27.010: E/AndroidRuntime(733): at com.example.recycletelaviv.ChooseRecycle.onCreate(ChooseRecycle.java:81)
11-14 22:54:27.010: E/AndroidRuntime(733): at android.app.Activity.performCreate(Activity.java:5008)
11-14 22:54:27.010: E/AndroidRuntime(733): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
11-14 22:54:27.010: E/AndroidRuntime(733): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
11-14 22:54:27.010: E/AndroidRuntime(733): ... 11 more
11-14 22:54:46.440: I/Process(733): Sending signal. PID: 733 SIG: 9
なぜこれが起こるのかについてのアイデアはありますか？
本当にありがとう