Question

问题是，当我点击ListView时，应用程序才会关闭。我使用BaseAdapter。我需要打开一个新的Acitivty来显示详细信息，这个问题阻止了我。如果我删除此代码，它不会关闭。请帮助解决这个问题，否则我可能会做错事。

Intent in = new Intent(getApplicationContext(),
                OnClickActivity.class);
        in.putExtra(TAG_RATING, rating2);
        in.putExtra(TAG_USER, name2);
        in.putExtra(TAG_DESC, desc2);
        in.putExtra(TAG_DATE, date2);
        in.putExtra(TAG_ID, postID);
        startActivity(in);

完整代码：

public class AsyncTaskParseJson extends AsyncTask<String, String, String> {

    final String TAG = "AsyncTaskParseJson.java";
    JSONArray dataJsonArr = null;

    @Override
    protected void onPreExecute() {}

    @Override
    protected String doInBackground(String... arg0) {

        try {


            JsonParser jParser = new JsonParser();
            JSONObject json = jParser.getJSONFromUrl(URL);
            dataJsonArr = json.getJSONArray("data");

            for (int i = 0; i < dataJsonArr.length(); i++) {

                JSONObject c = dataJsonArr.getJSONObject(i);

                String nickname = c.getString("nickname");
                String description = c.getString("description");
                products.add(new ItemInfo(nickname, description));

            }

        } catch (JSONException e) {
            e.printStackTrace();
        }

        return null;
    }

    @Override
    protected void onPostExecute(String strFromDoInBg) 
    {
         SetAdapter();
    }
}

public void SetAdapter()
{
    boxAdapter = new BoxAdapter(this, products);
    ListView lvMain = (ListView) findViewById(R.id.list);
    lvMain.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view,
                int position, long id) 
        {
            ListView lvMain = (ListView) findViewById(R.id.list);
            int pos = lvMain.getPositionForView(view);
            test(pos);
        }
    });
    lvMain.setAdapter(boxAdapter);
}

public void test(int position)
{
    ItemInfo p = boxAdapter.getItem(position);

    String name2 = p.username;
    String desc2 = p.description;

    Intent in = new Intent(getApplicationContext(),
            OnClickActivity.class);
    in.putExtra(TAG_USER, name2);
    in.putExtra(TAG_DESC, desc2);
    startActivity(in);
}

LogCat日志：

03-27 21:05:43.923: W/dalvikvm(2496): threadid=1: thread exiting with uncaught exception (group=0x4157dba8)
03-27 21:05:43.923: E/AndroidRuntime(2496): FATAL EXCEPTION: main
03-27 21:05:43.923: E/AndroidRuntime(2496): Process: com.example.warapp, PID: 2496
03-27 21:05:43.923: E/AndroidRuntime(2496): android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.warapp/com.example.warapp.OnClickActivity}; have you declared this activity in your AndroidManifest.xml?
03-27 21:05:43.923: E/AndroidRuntime(2496):     at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1628)
03-27 21:05:43.923: E/AndroidRuntime(2496):     at android.app.Instrumentation.execStartActivity(Instrumentation.java:1424)
03-27 21:05:43.923: E/AndroidRuntime(2496):     at android.app.Activity.startActivityForResult(Activity.java:3424)
03-27 21:05:43.923: E/AndroidRuntime(2496):     at android.app.Activity.startActivityForResult(Activity.java:3385)
03-27 21:05:43.923: E/AndroidRuntime(2496):     at android.app.Activity.startActivity(Activity.java:3627)
03-27 21:05:43.923: E/AndroidRuntime(2496):     at android.app.Activity.startActivity(Activity.java:3595)
03-27 21:05:43.923: E/AndroidRuntime(2496):     at com.example.warapp.MainActivity.test(MainActivity.java:125)
03-27 21:05:43.923: E/AndroidRuntime(2496):     at com.example.warapp.MainActivity$1.onItemClick(MainActivity.java:102)
03-27 21:05:43.923: E/AndroidRuntime(2496):     at android.widget.AdapterView.performItemClick(AdapterView.java:299)
03-27 21:05:43.923: E/AndroidRuntime(2496):     at android.widget.AbsListView.performItemClick(AbsListView.java:1113)
03-27 21:05:43.923: E/AndroidRuntime(2496):     at android.widget.AbsListView$PerformClick.run(AbsListView.java:2904)
03-27 21:05:43.923: E/AndroidRuntime(2496):     at android.widget.AbsListView$3.run(AbsListView.java:3638)
03-27 21:05:43.923: E/AndroidRuntime(2496):     at android.os.Handler.handleCallback(Handler.java:733)
03-27 21:05:43.923: E/AndroidRuntime(2496):     at android.os.Handler.dispatchMessage(Handler.java:95)
03-27 21:05:43.923: E/AndroidRuntime(2496):     at android.os.Looper.loop(Looper.java:136)
03-27 21:05:43.923: E/AndroidRuntime(2496):     at android.app.ActivityThread.main(ActivityThread.java:5017)
03-27 21:05:43.923: E/AndroidRuntime(2496):     at java.lang.reflect.Method.invokeNative(Native Method)
03-27 21:05:43.923: E/AndroidRuntime(2496):     at java.lang.reflect.Method.invoke(Method.java:515)
03-27 21:05:43.923: E/AndroidRuntime(2496):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
03-27 21:05:43.923: E/AndroidRuntime(2496):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
03-27 21:05:43.923: E/AndroidRuntime(2496):     at dalvik.system.NativeStart.main(Native Method)

Answer 1

> Unable to find explicit activity class {com.example.warapp/com.example.warapp.OnClickActivity}; have you declared this activity in your AndroidManifest.xml?

检查您的Manifest.xml，您的IDE可能忘记在Manifest.xml中声明它，或者您以错误的方式重命名它。

这是我在应用程序代码中的AndroidManifest.xml中声明的活动之一：

<activity
android:name="CameraActivity"
android:configChanges="orientation"
android:screenOrientation="portrait"
android:label="CameraActivity"/>

Answer 2

检查是否将OnClickActivity添加到AndroidManifest.xml。

Java Android - 新活动的麻烦

2 个答案: