次のコードがあり、JSON.getJSONfromURL() メソッドで追加のパラメーターを渡したいのですが、Android をチェックすると、この例外がスローされます
04-11 11:58:18.929: E/AndroidRuntime(566): 致命的な例外: メイン 04-11 11:58:18.929: E/AndroidRuntime(566): java.lang.RuntimeException: アクティビティ ComponentInfo{cyclist を開始できません。 project/cyclist.project.user_discussion}: java.lang.NullPointerException 04-11 11:58:18.929: E/AndroidRuntime(566): android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 04-11 11: 58:18.929: E/AndroidRuntime(566): android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 04-11 11:58:18.929: E/AndroidRuntime(566): android.app.ActivityThread.access で$2300(ActivityThread.java:125) 04-11 11:58:18.929: E/AndroidRuntime(566): android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 04-11 11:58:18.929: E/AndroidRuntime(566): android.os.Handler.dispatchMessage(Handler.java:99) 04-11 11:58:18.929: E/AndroidRuntime(566): android.os.Looper.loop(Looper.java:123) 04-11 11:58:18.929: E/AndroidRuntime(566): でandroid.app.ActivityThread.main(ActivityThread.java:4627) 04-11 11:58:18.929: E/AndroidRuntime(566): java.lang.reflect.Method.invokeNative(ネイティブ メソッド) 04-11 11:58 で:18.929: E/AndroidRuntime(566): java.lang.reflect.Method.invoke(Method.java:521) 04-11 11:58:18.929: E/AndroidRuntime(566): com.android.internal. os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 04-11 11:58:18.929: E/AndroidRuntime(566): com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 04 -11 11:58:18.929: E/AndroidRuntime(566): dalvik.system.NativeStart.main(Native Method) 04-11 11:58:18.929: E/AndroidRuntime(566): 原因: java.lang. NullPointerException 04-11 11:58:18。929: E/AndroidRuntime(566): cyclelist.project.JSON.getJSONfromURL(JSON.java:60) 04-11 11:58:18.929: E/AndroidRuntime(566): cyclelist.project.user_discussion.setList(user_discussionで.java:250) 04-11 11:58:18.929: E/AndroidRuntime(566): cyclelist.project.user_discussion.onCreate(user_discussion.java:154) 04-11 11:58:18.929: E/AndroidRuntime(566) ): android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 04-11 11:58:18.929: E/AndroidRuntime(566): android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 04- 11 11:58:18.929: E/AndroidRuntime(566): ... 11 もっと見る929: E/AndroidRuntime(566): cyclelist.project.user_discussion.onCreate(user_discussion.java:154) 04-11 11:58:18.929: E/AndroidRuntime(566): android.app.Instrumentation.callActivityOnCreate(Instrumentation) .java:1047) 04-11 11:58:18.929: E/AndroidRuntime(566): android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 04-11 11:58:18.929: E/AndroidRuntime(566) ): ... 11 以上929: E/AndroidRuntime(566): cyclelist.project.user_discussion.onCreate(user_discussion.java:154) 04-11 11:58:18.929: E/AndroidRuntime(566): android.app.Instrumentation.callActivityOnCreate(Instrumentation) .java:1047) 04-11 11:58:18.929: E/AndroidRuntime(566): android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 04-11 11:58:18.929: E/AndroidRuntime(566) ): ... 11 以上
コード：
JSONObject json;
try {
json = new JSONObject(
JSON.getJSONfromURL("http://myweb.com/ws_cyc/events_service.php?action=get_chats&title=fsfbnn" ));
JSONArray miles = json.getJSONArray("cyc");
JSONObject rec;
JSONObject rec2 = null;
for (int i=0; i<miles.length(); i++){
rec = miles.getJSONObject(i);
rec2 = rec.getJSONObject("cycObject");
new discussion_item(rec2.getString("Chats").toString());
ImgList.add( rec2.getString("image_path").toString() );
list.add( rec2.getString("email").toString() + ": " + rec2.getString("Chats").toString() );
}
} catch (JSONException e) {
e.printStackTrace();
}
JSON.getJSONfromURL() で追加のパラメーターを渡す方法と、php がそれを取得する方法を教えてください。jason をキャッチする私の php コードは
$titlez = json_decode($_GET['title']);