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最初の機能は、サーバーに接続し、いくつかの記事を取得するために php パーサーを実行することです。私の作成時にこのメソッドを呼び出します：

private String jsonTaker() throws IOException, JSONException {  
    //call EventsTaker class -> take the 'articles'
    JsonReader jsr = new JsonReader();

    JSONObject json =     jsr.readJsonFromUrl("http://jem88.net/timeSpaceParser.php");
    System.out.println(json.toString());
    System.out.println(json.get("id"));

    return json.toString();
}

これはreadJsonFromUrl()andreadAll()メソッドです：

public JSONObject readJsonFromUrl(String url) throws IOException, JSONException {
    InputStream is = new URL (url).openStream();
    //sia maledetto il creatore di java e tutta la sua genia diojavosogeloso
    InputStreamReader isr = new InputStreamReader(is, Charset.forName("UTF-8"));
    BufferedReader rd = new BufferedReader(isr);
    String jsonText = readAll(rd);
    JSONObject json = new JSONObject(jsonText);
    Log.d("readJsonFromUrl", "String to json transformed!");
    is.close();
    return json;        
}

private static String readAll(Reader rd) throws IOException {
    StringBuilder sb = new StringBuilder();
    int cp;
    while ((cp = rd.read()) != -1) {
        sb.append((char) cp);
    }
    return sb.toString();
}

デバッグモードでエラーが表示され、実行がreadJsonFromUrl()メソッドの最初の行に到着し、そこでストリームを開こうとします。ここで、「ソースが見つかりません」というエラーでアプリケーションがクラッシュします。これについてグーグルで調べてみましたが、与えられた提案のどれも私にとって良いものではありませんでした! だから、どんな提案も素晴らしいでしょう！

編集 -> 例外の管理を編集したところ、致命的な例外が発生しました。ログキャットは次のとおりです。

06-04 23:46:56.411: D/AndroidRuntime(22456): Shutting down VM
06-04 23:46:56.411: W/dalvikvm(22456): threadid=1: thread exiting with uncaught exception (group=0x40e312a0)
06-04 23:46:56.436: E/AndroidRuntime(22456): FATAL EXCEPTION: main
06-04 23:46:56.436: E/AndroidRuntime(22456): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.jem88.timespace/com.jem88.timespace.MainActivity}: android.os.NetworkOnMainThreadException
06-04 23:46:56.436: E/AndroidRuntime(22456):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2110)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at android.app.ActivityThread.access$700(ActivityThread.java:140)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1237)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at android.os.Handler.dispatchMessage(Handler.java:99)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at android.os.Looper.loop(Looper.java:137)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at android.app.ActivityThread.main(ActivityThread.java:4921)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at java.lang.reflect.Method.invokeNative(Native Method)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at java.lang.reflect.Method.invoke(Method.java:511)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1027)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at dalvik.system.NativeStart.main(Native Method)
06-04 23:46:56.436: E/AndroidRuntime(22456): Caused by: android.os.NetworkOnMainThreadException
06-04 23:46:56.436: E/AndroidRuntime(22456):    at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1118)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at java.net.InetAddress.getAllByName(InetAddress.java:214)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at libcore.net.http.HttpConnection.<init>(HttpConnection.java:70)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:340)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:87)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:315)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at libcore.net.http.HttpEngine.connect(HttpEngine.java:310)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:289)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:239)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at libcore.net.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:273)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at libcore.net.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:168)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at java.net.URL.openStream(URL.java:462)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at com.jem88.timespace.JsonReader.readJsonFromUrl(JsonReader.java:44)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at com.jem88.timespace.MainActivity.jsonTaker(MainActivity.java:46)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at com.jem88.timespace.MainActivity.onCreate(MainActivity.java:23)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at android.app.Activity.performCreate(Activity.java:5206)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
06-04 23:46:56.436: E/AndroidRuntime(22456):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2074)
06-04 23:46:56.436: E/AndroidRuntime(22456):    ... 11 more
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1 に答える 1

0

メインスレッドよりも別のスレッドに入れるだけで、コードを自分でテストしました

    Thread tr=new Thread(new Runnable() {

        @Override
        public void run() {
            // TODO Auto-generated method stub
            try {
            Log.v("Alefon", jsonTaker());   
            } catch (IOException e) {
                // TODO Auto-generated catch block
                Log.e("Alefon", "errr"+e.getMessage());
            } catch (JSONException e) {
                // TODO Auto-generated catch block
                Log.e("Alefon", "errr "+e.getMessage());
            }
        }
    });

    tr.start();

AsyncTask を使用することを実践することをお勧めします:リンクを参照してください

于 2013-06-04T22:16:27.543 に答える