Android getview和getcount称为循环时间，我使用自定义listview

好的，我使用一个自定义的ListView，ListView有202个项目。当加载ListView时，它会花费太多的时间。大约6~7秒。我在getView（）方法中将System.out.println变为白色。然后getView运行202次，之后getView再次运行202次 循环操作5次。 这是我的listview布局xml

<ScrollView
            android:id="@+id/djrwxm_scroll"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:fillViewport="true">
            <com.joinbright.util.NoScrollListView
                android:id="@+id/djrwxm_list"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:cacheColorHint="#00000000"
                android:dividerHeight="0dip"
                android:focusable="false"
                android:focusableInTouchMode="true"
                android:footerDividersEnabled="false"
                android:listSelector="#00000000"
                android:padding="1dip" />
        </ScrollView>

我的自定义适配器代码

public class ListViewAdapter extends BaseAdapter
{

    List<Bundle> newsItems;

//      private LayoutInflater mInflater;



    public Bundle map = new Bundle();


    private List<String> spinnerList = new ArrayList<String>(3);
    private List<String> clfsspinnerList = new ArrayList<String>(3);

    private ArrayAdapter<String> djjladapter;
    private ArrayAdapter<String> clfsadapter;
    private int index = -1;
    private boolean ifload = true;
    public ListViewAdapter(List<Bundle> cList)
    {
        this.newsItems = cList;
        spinnerList.add("");
        spinnerList.add("zc");
        spinnerList.add("yc");

        clfsspinnerList.add("");
        clfsspinnerList.add("wxcl");
        clfsspinnerList.add("jdcl");
        clfsspinnerList.add("zrqx");
//          mInflater = (LayoutInflater) DjrwxmActivity.this
//                  .getSystemService(LAYOUT_INFLATER_SERVICE);

    }
    @Override
    public int getCount()
    {
        System.out.println("getCount()::::"+newsItems.size());
        return newsItems.size();
    }
    @Override
    public Object getItem(int position)
    {
        System.out.println("getItem()::::");
        return newsItems.get(position);
    }
    @Override
    public long getItemId(int position)
    {
        System.out.println("getItemId()::::");
        return position;
    }

---

在

滚动视图

中有一个

列表视图

。这很糟糕。

ListView

已经知道如何滚动，因此存在冲突。要让周围的

ScrollView

知道如何滚动，它需要询问

ListView

整个内容有多大。为了让

ListView

知道整个内容有多大，它需要对每个元素调用

getView（）

。您肯定不想这样做。

为什么要注释掉viewholder部分？他们非常重要！LawrenceChoy说，粘贴适配器可能会有错误，他评论说，取景器部分不会回收电池，这在性能方面非常糟糕。请张贴你的适配器。@Lawrence Choy我只是做一个test@TonyStark我已经提交了自定义适配器代码，请帮助mehi@david wasser我们也可以在scrollview中使用listview，如果我们有更好的小调整的话performance@TonyStark我不明白你的评论。我的理解是，

ListView

已经过高度优化。也许你只是没有正确地使用它？查看用户希望在第一次运行时完全加载listview的情况。。因此，这个概念很好……如果你想这样做，我认为你不应该使用

ListView

<代码>列表视图已优化以回收项目视图。如果不这样做，就不需要

列表视图

。写下你自己的。大卫，还有别的选择吗

public class ListViewAdapter extends BaseAdapter
{

    List<Bundle> newsItems;

//      private LayoutInflater mInflater;



    public Bundle map = new Bundle();


    private List<String> spinnerList = new ArrayList<String>(3);
    private List<String> clfsspinnerList = new ArrayList<String>(3);

    private ArrayAdapter<String> djjladapter;
    private ArrayAdapter<String> clfsadapter;
    private int index = -1;
    private boolean ifload = true;
    public ListViewAdapter(List<Bundle> cList)
    {
        this.newsItems = cList;
        spinnerList.add("");
        spinnerList.add("zc");
        spinnerList.add("yc");

        clfsspinnerList.add("");
        clfsspinnerList.add("wxcl");
        clfsspinnerList.add("jdcl");
        clfsspinnerList.add("zrqx");
//          mInflater = (LayoutInflater) DjrwxmActivity.this
//                  .getSystemService(LAYOUT_INFLATER_SERVICE);

    }
    @Override
    public int getCount()
    {
        System.out.println("getCount()::::"+newsItems.size());
        return newsItems.size();
    }
    @Override
    public Object getItem(int position)
    {
        System.out.println("getItem()::::");
        return newsItems.get(position);
    }
    @Override
    public long getItemId(int position)
    {
        System.out.println("getItemId()::::");
        return position;
    }

     @Override
    public View getView(final int position, View convertView,
            ViewGroup parent) {
        int type = getItemViewType(position);
        System.out.println("//*******************************************************************      //");
        System.out.println("getView =========：：：" + position + "convertView:: " + convertView + " type = " + type);
        ViewHolder holder = null;
            try {
            map = newsItems.get(position);
                if (convertView == null) {

 //                 convertView = mInflater.inflate(R.layout.listitem_djrwxm,
 //                         null);
                convertView = getLayoutInflater().inflate(R.layout.listitem_djrwxm,
                        null);
                holder = new ViewHolder();
                holder.djrwxm_sbguid = (TextView) convertView
                        .findViewById(R.id.djrwxm_sbguid);
                holder.djrwxm_djzq = (TextView) convertView
                        .findViewById(R.id.djrwxm_djzq);
                holder.djrwxm_sfdj = (TextView) convertView
                        .findViewById(R.id.djrwxm_sfdj);
                holder.djrwxm_guid = (TextView) convertView
                        .findViewById(R.id.djrwxm_guid);
                holder.djrwxm_djdx = (TextView) convertView
                        .findViewById(R.id.djrwxm_djdx);
                holder.djrwxm_sbmc = (TextView) convertView
                        .findViewById(R.id.djrwxm_sbmc);
                holder.djrwxm_rwzt = (TextView) convertView
                        .findViewById(R.id.djrwxm_rwzt);
                holder.djrwxm_djnr = (TextView) convertView
                        .findViewById(R.id.djrwxm_djnr);
                holder.djrwxm_djbz = (TextView) convertView
                        .findViewById(R.id.djrwxm_djbz);
                holder.djrwxm_djjl = (Spinner) convertView
                        .findViewById(R.id.djrwxm_djjl);
                holder.djrwxm_ycsm = (EditText) convertView
                        .findViewById(R.id.djrwxm_ycsm);
                holder.djrwxm_cljg = (EditText) convertView
                        .findViewById(R.id.djrwxm_cljg);
                holder.djrwxm_clfs = (Spinner) convertView
                        .findViewById(R.id.djrwxm_clfs);
                holder.djrwxm_bz = (EditText) convertView
                        .findViewById(R.id.djrwxm_bz);
                    convertView.setTag(holder);
                } else {
                    holder = (ViewHolder) convertView.getTag();
                }
            djjladapter = new ArrayAdapter<String>(DjrwxmActivity.this,
                    android.R.layout.simple_spinner_item, spinnerList);
            djjladapter
                    .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
            clfsadapter = new ArrayAdapter<String>(DjrwxmActivity.this,
                    android.R.layout.simple_spinner_item, clfsspinnerList);
            clfsadapter
                    .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
            holder.djrwxm_djjl.setAdapter(djjladapter);
            holder.djrwxm_clfs.setAdapter(clfsadapter);
            holder.djrwxm_djjl.setPrompt("请选择点检结论：");
            holder.djrwxm_djjl.setSelection(1);
            holder.djrwxm_clfs.setPrompt("请选择处理方式：");
            final ViewHolder queholder = holder;
            holder.djrwxm_djjl
                    .setOnItemSelectedListener(new Spinner.OnItemSelectedListener() {
                        public void onItemSelected(
                                android.widget.AdapterView<?> arg0,
                                View arg1, int arg2, long arg3) {
                            if (arg2 == 1) {
                                queholder.djrwxm_clfs.setClickable(false);
                                queholder.djrwxm_ycsm.setEnabled(false);
                            } else {
                                queholder.djrwxm_clfs.setClickable(true);
                                queholder.djrwxm_ycsm.setEnabled(true);
                            }
                            // arg0.setVisibility(View.VISIBLE);
                        }
                        public void onNothingSelected(
                                android.widget.AdapterView<?> arg0) {
                            // arg0.setVisibility(View.VISIBLE);
                        }
                    });
            holder.djrwxm_clfs.setOnTouchListener(new OnTouchListener() {
                @Override
                public boolean onTouch(View v, MotionEvent event) {
                    switch (event.getAction()) {
                    case 0:
                        Spinner ss = (Spinner) v;
                        ss.setOnItemSelectedListener(new Spinner.OnItemSelectedListener() {
                            String sbmc = newsItems.get(position)
                                    .getString("sbmc").toString();
                            String djdx = newsItems.get(position)
                                    .getString("djdx").toString();
                            String sbguid = newsItems.get(position)
                                    .getString("sbguid").toString();


                            @Override
                            public void onItemSelected(
                                    AdapterView<?> parent, View view,
                                    int position, long id) {
                                Intent i = getIntent();
                                String rwid = i.getStringExtra("rwid");
                                if (position == 3) {
                                    Intent intent = new Intent(
                                            DjrwxmActivity.this,
                                            DjqxActivity.class);
                                    intent.putExtra("sbmc", sbmc);
//                                      intent.putExtra("djdx", djdx);
                                    intent.putExtra("sbguid", sbguid);
                                    intent.putExtra("rwid", rwid);
                                    startActivity(intent);
                                    overridePendingTransition(
                                            R.anim.zoom_enter,
                                            R.anim.zoom_exit);
                                }
                            }
                            @Override
                            public void onNothingSelected(
                                    AdapterView<?> parent) {
                            }
                        });
                        break;
                    }
                    return false;
                }
            });
            sitbopedjrwxmdao = new sITbOpeDjrwxmDaoImpl(DjrwxmActivity.this);
            Intent intent = getIntent();
            String rwid = intent.getStringExtra("rwid");
            String djdx = map.getString("djdx").toString();
            Bundle bundle = sitbopedjrwxmdao.getneirong(djdx, rwid);

            holder.djrwxm_sbguid.setText(map.getString("sbguid").toString());
            holder.djrwxm_djzq.setText(map.getString("djzq").toString());
            holder.djrwxm_sfdj.setText(map.getString("sfdj").toString());
            holder.djrwxm_guid.setText(map.getString("guid").toString());
            holder.djrwxm_djdx.setText(map.getString("djdx").toString());
            holder.djrwxm_sbmc.setText(map.getString("sbmc").toString());
            holder.djrwxm_rwzt.setText(map.getString("rwzt").toString());
            holder.djrwxm_djnr.setText(map.getString("djnr").toString());
            holder.djrwxm_djbz.setText(map.getString("djbz").toString());

            if (bundle != null) {
                if ("1600801".equals(bundle.getString("djjl"))) {
                    holder.djrwxm_djjl.setSelection(1);
                } else if ("1600802".equals(bundle.getString("djjl"))) {
                    holder.djrwxm_djjl.setSelection(2);
                }
                holder.djrwxm_ycsm.setText(bundle.getString("ycsm"));
                holder.djrwxm_cljg.setText(bundle.getString("cljg"));
                holder.djrwxm_bz.setText(bundle.getString("bz"));
                if ("1601601".equals(bundle.getString("clfs"))) {
                    holder.djrwxm_clfs.setSelection(2);
                } else if ("1601602".equals(bundle.getString("clfs"))) {
                    holder.djrwxm_clfs.setSelection(1);
                } else if ("1601603".equals(bundle.getString("clfs"))) {
                    holder.djrwxm_clfs.setSelection(3);
                }
            }
            final String djbz = holder.djrwxm_djbz.getText().toString();
            holder.djrwxm_djbz.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {
                    int[] location = new int[2];
                    v.getLocationInWindow(location);
                    int x = location[0];
                    int y = location[1];
                    Bundle bundle = new Bundle();
                    bundle.putString("djbz", djbz);
                    bundle.putInt("x", x);
                    bundle.putInt("y", y);
                    showDialog(1, bundle);
                }
            });

            holder.djrwxm_cljg.setOnTouchListener(new OnTouchListener() {
                public boolean onTouch(View view, MotionEvent event) {
                    if (event.getAction() == MotionEvent.ACTION_UP) {
                        index = position;
                    }
                    return false;
                }
            });
            if (index != -1 && index == position) {
                holder.djrwxm_cljg.requestFocus();
            }
            if (position == AdapterView.INVALID_POSITION) {
            } else {
                if (position % 2 == 0) {
                    convertView
                            .setBackgroundResource(R.xml.xml_list_shape_blue);
                } else {
                    convertView
                            .setBackgroundResource(R.xml.xml_list_shape_hui);
                }
            }
//          } catch (Exception e) {
//              e.printStackTrace();
//          }
        if (!ifload) {
            ifload = true;
        }
        return convertView;
    }
}

11-05 17:20:32.800: I/System.out(20354): 调用了getCount()::::202
11-05 17:20:32.800: I/System.out(20354): 调用了getCount()::::202
11-05 17:20:32.831: I/System.out(20354): 调用了getCount()::::202
11-05 17:20:32.831: I/System.out(20354): 调用了getCount()::::202
11-05 17:20:32.831: I/System.out(20354): //*******************************************************************//
11-05 17:20:32.831: I/System.out(20354): getView =========：：：0convertView:: null type = 0
11-05 17:20:32.901: I/System.out(20354): //*******************************************************************//
11-05 17:20:32.901: I/System.out(20354): getView =========：：：1convertView:: android.widget.TableLayout{41dc55b8 V.E..... ......ID 0,0-0,0} type = 0
11-05 17:20:32.956: I/System.out(20354): //*******************************************************************//
11-05 17:20:32.956: I/System.out(20354): getView =========：：：2convertView:: android.widget.TableLayout{41dc6048 V.E..... ......ID 0,0-0,0} type = 0
11-05 17:20:33.003: I/System.out(20354): //*******************************************************************//
11-05 17:20:33.003: I/System.out(20354): getView =========：：：3convertView:: android.widget.TableLayout{41dc9770 V.E..... ......ID 0,0-0,0} type = 0
11-05 17:20:33.050: I/System.out(20354): //*******************************************************************//
11-05 17:20:33.050: I/System.out(20354): getView =========：：：4convertView:: android.widget.TableLayout{41dcc7a0 V.E..... ......ID 0,0-0,0} type = 0
11-05 17:20:33.097: I/System.out(20354): //*******************************************************************//
11-05 17:20:42.105: I/System.out(20354): getView =========：：：198convertView:: android.widget.TableLayout{42aa8ad0 V.E..... ......ID 0,0-0,0} type = 0
11-05 17:20:42.144: I/System.out(20354): //*******************************************************************//
11-05 17:20:42.144: I/System.out(20354): getView =========：：：199convertView:: android.widget.TableLayout{42ab8928 V.E..... ......ID 0,0-0,0} type = 0
11-05 17:20:42.183: I/System.out(20354): //*******************************************************************//
11-05 17:20:42.183: I/System.out(20354): getView =========：：：200convertView:: android.widget.TableLayout{42ac89a0 V.E..... ......ID 0,0-0,0} type = 0
11-05 17:20:42.230: I/System.out(20354): //*******************************************************************//
11-05 17:20:42.230: I/System.out(20354): getView =========：：：201convertView:: android.widget.TableLayout{42ad8b38 V.E..... ......ID 0,0-0,0} type = 0
11-05 17:20:42.269: I/System.out(20354): 调用了getCount()::::202
11-05 17:20:42.269: I/System.out(20354): //*******************************************************************//
11-05 17:20:42.269: I/System.out(20354): getView =========：：：0convertView:: android.widget.TableLayout{42ae8cd0 V.E..... ......ID 0,0-0,0} type = 0
11-05 17:20:42.339: I/System.out(20354): //*******************************************************************//
11-05 17:20:42.339: I/System.out(20354): getView =========：：：1convertView:: android.widget.TableLayout{41dc55b8 V.E..... ......ID 0,0-0,0} type = 0
11-05 17:20:42.394: I/System.out(20354): //*******************************************************************//
11-05 17:20:42.394: I/System.out(20354): getView =========：：：2convertView:: android.widget.TableLayout{41dc6048 V.E..... ......ID 0,0-0,0} type = 0