重複の可能性:
Android ランタイム検証エラー
illbehonest という YouTube のチャンネルから利用可能なビデオのリストを表示するアプリを取得しようとしています。私は何を間違っていますか?そのためにJava-JSONライブラリを使用しています。VideoPlay アクティビティ (ちなみに、その名前はその機能とは関係ありません) に移動しようとするたびに、アプリケーション フォースが終了します。コードは次のとおりです。
package com.aer.illbehonest;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import net.sf.json.JSONSerializer;
import org.apache.commons.io.IOUtils;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;
public class VideoPlay extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_video_play);
new ShowTitlesTask().execute("");
}
class ShowTitlesTask extends AsyncTask<String, Void, ArrayList<String>> {
ArrayList<String> titlesList;
@Override
protected ArrayList<String> doInBackground(String... args) {
URL jsonURL = null;
try {
jsonURL = new URL("http://gdata.youtube.com/feeds/api/users/illbehonest/uploads?v=2&alt=jsonc");
} catch (MalformedURLException e3) {
e3.printStackTrace();
}
URLConnection jc = null;
try {
jc = jsonURL.openConnection();
} catch (IOException e2) {
e2.printStackTrace();
}
InputStream is = null;
try {
is = jc.getInputStream();
} catch (IOException e1) {
e1.printStackTrace();
}
String jsonTxt = null;
try {
jsonTxt = IOUtils.toString(is);
} catch (IOException e) {
e.printStackTrace();
}
JSONObject json = (JSONObject) JSONSerializer.toJSON(jsonTxt);
JSONObject jdata = json.getJSONObject("data");
JSONArray jentry = jdata.getJSONArray("items");
for (int entryNumber = 0; entryNumber<=25; entryNumber++){
JSONObject entry = jentry.getJSONObject(entryNumber);
titlesList.add(entry.getString("title"));
}
return titlesList;
}
protected void onPostExecute(ArrayList<String> result) {
ListView listView = (ListView)VideoPlay.this.findViewById(R.id.videolist);
ArrayAdapter<String> adapter = new ArrayAdapter<String> (VideoPlay.this,
android.R.layout.simple_list_item_1, android.R.id.text1, titlesList);
(listView).setAdapter(adapter);
}
}
}
LogCat の出力は次のとおりです。
01-14 16:58:36.699: W/dalvikvm(11938): Unable to resolve superclass of Lnet/sf/json/JSONException; (1034)
01-14 16:58:36.707: W/dalvikvm(11938): Link of class 'Lnet/sf/json/JSONException;' failed
01-14 16:58:36.707: W/dalvikvm(11938): VFY: unable to resolve exception class 813 (Lnet/sf/json/JSONException;)
01-14 16:58:36.707: W/dalvikvm(11938): VFY: unable to find exception handler at addr 0x2e
01-14 16:58:36.707: W/dalvikvm(11938): VFY: rejected Lnet/sf/json/JSONSerializer;.toJSON (Ljava/lang/Object;Lnet/sf/json/JsonConfig;)Lnet/sf/json/JSON;
01-14 16:58:36.707: W/dalvikvm(11938): VFY: rejecting opcode 0x0d at 0x002e
01-14 16:58:36.707: W/dalvikvm(11938): VFY: rejected Lnet/sf/json/JSONSerializer;.toJSON (Ljava/lang/Object;Lnet/sf/json/JsonConfig;)Lnet/sf/json/JSON;
01-14 16:58:36.707: W/dalvikvm(11938): Verifier rejected class Lnet/sf/json/JSONSerializer;
01-14 16:58:36.707: W/dalvikvm(11938): threadid=11: thread exiting with uncaught exception (group=0x41b28930)
01-14 16:58:36.707: E/AndroidRuntime(11938): FATAL EXCEPTION: AsyncTask #1
01-14 16:58:36.707: E/AndroidRuntime(11938): java.lang.RuntimeException: An error occured while executing doInBackground()
01-14 16:58:36.707: E/AndroidRuntime(11938): at android.os.AsyncTask$3.done(AsyncTask.java:299)
01-14 16:58:36.707: E/AndroidRuntime(11938): at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:352)
01-14 16:58:36.707: E/AndroidRuntime(11938): at java.util.concurrent.FutureTask.setException(FutureTask.java:219)
01-14 16:58:36.707: E/AndroidRuntime(11938): at java.util.concurrent.FutureTask.run(FutureTask.java:239)
01-14 16:58:36.707: E/AndroidRuntime(11938): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
01-14 16:58:36.707: E/AndroidRuntime(11938): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
01-14 16:58:36.707: E/AndroidRuntime(11938): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
01-14 16:58:36.707: E/AndroidRuntime(11938): at java.lang.Thread.run(Thread.java:856)
01-14 16:58:36.707: E/AndroidRuntime(11938): Caused by: java.lang.VerifyError: net/sf/json/JSONSerializer
01-14 16:58:36.707: E/AndroidRuntime(11938): at com.aer.illbehonest.VideoPlay$ShowTitlesTask.doInBackground(VideoPlay.java:63)
01-14 16:58:36.707: E/AndroidRuntime(11938): at com.aer.illbehonest.VideoPlay$ShowTitlesTask.doInBackground(VideoPlay.java:1)
01-14 16:58:36.707: E/AndroidRuntime(11938): at android.os.AsyncTask$2.call(AsyncTask.java:287)
01-14 16:58:36.707: E/AndroidRuntime(11938): at java.util.concurrent.FutureTask.run(FutureTask.java:234)
01-14 16:58:36.707: E/AndroidRuntime(11938): ... 4 more