内存问题/光标显示空指针

Question

我正在获取联系人的姓名和电子邮件 ID，它在 HTC Desire 中运行良好，但每当我尝试在 Galaxy 选项卡中运行代码时，它都会显示 memObj 中没有内存和空指针...而（emailCur .moveToNext()) .

这是我的代码

private void getPeopleList() {
    String name, email;
    Runtime.getRuntime().maxMemory();
    c = cr.query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null);
    if (c.getCount() > 0) {
        while (c.moveToNext()) {

            name = c.getString(c
                    .getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));

            String id = c.getString(c
                    .getColumnIndex(BaseColumns._ID));
            cr.query(
                    ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
                    null,
                    ContactsContract.CommonDataKinds.Phone.CONTACT_ID
                            + " = ?", new String[] { id }, null);


             emailCur = cr.query(Email.CONTENT_URI, null,
                    Email.CONTACT_ID + " = " + id, null, null);

            int j = 0;

            while (emailCur.moveToNext()) {

                bindData = new BindData[emailCur.getCount()];
                bindData = new BindData();
                email = emailCur
                        .getString(emailCur
                                .getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA));

                bindData.setEmailId(email);
                bindData.setName(name);
                Log.d("doubt : ", name+"//"+email);
                mArrayList.add(bindData);
                j++;


            }
            emailCur.close();                   
        }
        c.close();

    }


}

我正在使用可运行的工作线程调用此方法。

如果需要任何信息，请告诉我。

这是我的日志猫

06-29 16:13:26.854: ERROR/IMemory(6180): binder=0xdf3f68 transaction failed    fd=-2147483647, size=0, err=-2147483646 (Unknown error: 2147483646)
06-29 16:13:26.854: ERROR/IMemory(6180): cannot dup fd=-2147483647, size=0, err=-2147483646 (Bad file number)
06-29 16:13:26.854: ERROR/IMemory(6180): cannot map BpMemoryHeap (binder=0xdf3f68), size=0, fd=-1 (Bad file number)
06-29 16:13:26.854: ERROR/JavaBinder(6180): *** Uncaught remote exception!  (Exceptions are not yet supported across processes.)
06-29 16:13:26.854: ERROR/JavaBinder(6180): java.lang.RuntimeException: No memory in memObj
06-29 16:13:26.854: ERROR/JavaBinder(6180):     at android.database.CursorWindow.native_init(Native Method)
06-29 16:13:26.854: ERROR/JavaBinder(6180):     at android.database.CursorWindow.<init>(CursorWindow.java:518)
06-29 16:13:26.854: ERROR/JavaBinder(6180):     at android.database.CursorWindow.<init>(CursorWindow.java:27)
06-29 16:13:26.854: ERROR/JavaBinder(6180):     at android.database.CursorWindow$1.createFromParcel(CursorWindow.java:493)
06-29 16:13:26.854: ERROR/JavaBinder(6180):     at android.database.CursorWindow$1.createFromParcel(CursorWindow.java:496)
06-29 16:13:26.854: ERROR/JavaBinder(6180):     at android.content.ContentProviderNative.onTransact(ContentProviderNative.java:103)
06-29 16:13:26.854: ERROR/JavaBinder(6180):     at android.os.Binder.execTransact(Binder.java:288)
06-29 16:13:26.854: ERROR/JavaBinder(6180):     at dalvik.system.NativeStart.run(Native Method)
06-29 16:13:26.858: ERROR/AndroidRuntime(6388): FATAL EXCEPTION: main
06-29 16:13:26.858: ERROR/AndroidRuntime(6388): java.lang.NullPointerException
06-29 16:13:26.858: ERROR/AndroidRuntime(6388):     at com.meomyo.fanaticfaninit.utils.MyCustomList.getPeopleList(MyCustomList.java:172)
06-29 16:13:26.858: ERROR/AndroidRuntime(6388):     at com.meomyo.fanaticfaninit.utils.MyCustomList.access$0(MyCustomList.java:144)
06-29 16:13:26.858: ERROR/AndroidRuntime(6388):     at com.meomyo.fanaticfaninit.utils.MyCustomList$1.run(MyCustomList.java:121)
06-29 16:13:26.858: ERROR/AndroidRuntime(6388):     at android.os.Handler.handleCallback(Handler.java:587)
06-29 16:13:26.858: ERROR/AndroidRuntime(6388):     at android.os.Handler.dispatchMessage(Handler.java:92)
06-29 16:13:26.858: ERROR/AndroidRuntime(6388):     at android.os.Looper.loop(Looper.java:123)
06-29 16:13:26.858: ERROR/AndroidRuntime(6388):     at android.app.ActivityThread.main(ActivityThread.java:4627)
06-29 16:13:26.858: ERROR/AndroidRuntime(6388):     at java.lang.reflect.Method.invokeNative(Native Method)
06-29 16:13:26.858: ERROR/AndroidRuntime(6388):     at java.lang.reflect.Method.invoke(Method.java:521)
06-29 16:13:26.858: ERROR/AndroidRuntime(6388):     at 

Answer 1

请你试试

if (emailCur.moveToFirst()) {
do {

} while (emailCur.moveToNext());
}

而不是emailCur.moveToNext()

Answer 2

得到答案：问题出在我目前正在使用的 ArrayList(mArraylist) 上，我也在通过我的适配器传递这个 arraylist，这就是将对象保存得太久而不是 arraylist 的原因。所以这里的解决方案是创建一个 Dummy ArrayList 将您的数据放入其中，并在将 ArrayList 传递到适配器时将其复制到原始 ArrayList 中。

这是代码。

ArrayList<BindData> dummyArrayList= new ArrayList<BindData>

在while循环中

dummyArrayList.add(bindData);

在创建 Adapter 实例之前，将此 Dummy ArrayList 复制到原始 ArrayList（您要传递给 Adapter 的列表）

  new Thread(new Runnable() {

        @Override
        public void run() {
            // TODO Auto-generated method stub
            getPeopleList();
            runOnUiThread(new Runnable() {                  
                @Override
                public void run() {
                    // TODO Auto-generated method stub
                    mArrayList.clear();
                    for(int i = 0; i < dummyArrayList.size(); i++){
                        mArrayList.add(dummyArrayList.get(i));
                    }
                    dummyArrayList.clear();
                    myAdapter.notifyDataSetChanged();
                    progressDialog.cancel();
                }
            });
        }
    }).start();

之后，您可以通过在其中传递原始 Arraylist 来创建适配器实例。

  MyAdapter myAdapter= new MyAdapter(this, R.layout.contactlistrow, mArrayList);

它会正常工作的。

谢谢