Android：ArrayAdapter设置TextView日期，如果它通过函数

时间：2015-01-27 12:51:48

标签： android

我正在制作聊天应用程序，我创建了这个ArrayAdapter 包帮助者; 

import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.TextView;

import java.util.Calendar;
import java.util.HashMap;
import java.util.List;

import als.chaterix.R;

/**
 * Created by arl on 27-Jan-15.
 */
public class ChatAdapter extends ArrayAdapter<String> {
    private final Context context;
    private final List values;

    public ChatAdapter(Context context, List values) {
        super(context, R.layout.messagelayout, values);
        this.context = context;
        this.values = values;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        LayoutInflater inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        View rowView = inflater.inflate(R.layout.messagelayout, parent, false);
        TextView sender = (TextView) rowView.findViewById(R.id.user);
        TextView date = (TextView) rowView.findViewById(R.id.date);
        TextView messa = (TextView)rowView.findViewById(R.id.message);
        sender.setText(((HashMap<String, String>)values.get(position)).get("user_id"));
        ShortcutFunc sf = new ShortcutFunc(this.context);

        try{
        date.setText(sf.FormatDate(((HashMap<String, String>)values.get(position)).get("time")));
        }catch(Exception e){
            Log.d("AdapterTimeError", e.toString());
        }

        messa.setText(((HashMap<String, String>) values.get(position)).get("message"));
        return rowView;
    }
}

但这一行：

try{
            date.setText(sf.FormatDate(((HashMap<String, String>)values.get(position)).get("time")));
            }catch(Exception e){
                Log.d("AdapterTimeError", e.toString());
            }

如果我在我的sf（ShortcutFunc）类中使用名为FormatDate的函数，那么date将同样应用于TextView，但是如果我不使用该函数那么它很好但格式错误。

我很确定它与位置变量有关，但我不知道是什么。

我该如何解决？我的意思是，就像日期位置被卡在第一次进入。

这是功能：

public String FormatDate(String date) throws ParseException {
    String turnOut = null;
    SimpleDateFormat sdf = new SimpleDateFormat("yyy-MM-dd hh:mm:ss");
    java.util.Date date2 = sdf.parse(date);

    Calendar c = Calendar.getInstance();
    c.setTime(date2);
    c.set(Calendar.HOUR_OF_DAY, 0);
    c.set(Calendar.MINUTE,0);
    c.set(Calendar.SECOND, 0);
    c.set(Calendar.MILLISECOND,0);
    Calendar yesterday = Calendar.getInstance();
    yesterday.add(Calendar.DAY_OF_MONTH, -1);
    yesterday.set(Calendar.HOUR_OF_DAY,0);
    yesterday.set(Calendar.MINUTE,0);
    yesterday.set(Calendar.SECOND,0);
    yesterday.set(Calendar.MILLISECOND,0);

    if (c.getTime().equals(new java.util.Date())){
        turnOut = "Today";
    } else if (c.equals(yesterday)) {
        turnOut = "Yesterday";
    } else {
        SimpleDateFormat sdf1 = new SimpleDateFormat("dd-MM-yyyy hh:mm");
        turnOut  = sdf1.format(date);
    }
    return turnOut;
}

图片：

 Log.d("StackOverflow", ((HashMap<String, String>)values.get(position)).get("time"));

enter image description here

还有一些有趣的东西，它是异常的，它是什么意思？

堆栈跟踪：

> 01-27 14:15:43.664  25244-25244/als.chaterix W/System.err﹕
> java.lang.IllegalArgumentException: Bad class: class java.lang.String
> 01-27 14:15:43.664  25244-25244/als.chaterix W/System.err﹕ at
> java.text.DateFormat.format(DateFormat.java:296) 01-27 14:15:43.664 
> 25244-25244/als.chaterix W/System.err﹕ at
> java.text.Format.format(Format.java:93) 01-27 14:15:43.664 
> 25244-25244/als.chaterix W/System.err﹕ at
> helpers.ShortcutFunc.FormatDate(ShortcutFunc.java:120) 01-27
> 14:15:43.664  25244-25244/als.chaterix W/System.err﹕ at
> helpers.ChatAdapter.getView(ChatAdapter.java:44) 01-27 14:15:43.664 
> 25244-25244/als.chaterix W/System.err﹕ at
> android.widget.AbsListView.obtainView(AbsListView.java:2255) 01-27
> 14:15:43.664  25244-25244/als.chaterix W/System.err﹕ at
> android.widget.ListView.makeAndAddView(ListView.java:1790) 01-27
> 14:15:43.664  25244-25244/als.chaterix W/System.err﹕ at
> android.widget.ListView.fillUp(ListView.java:725) 01-27 14:15:43.664 
> 25244-25244/als.chaterix W/System.err﹕ at
> android.widget.ListView.correctTooHigh(ListView.java:1414) 01-27
> 14:15:43.664  25244-25244/als.chaterix W/System.err﹕ at
> android.widget.ListView.fillSpecific(ListView.java:1352) 01-27
> 14:15:43.664  25244-25244/als.chaterix W/System.err﹕ at
> android.widget.ListView.layoutChildren(ListView.java:1620) 01-27
> 14:15:43.664  25244-25244/als.chaterix W/System.err﹕ at
> android.widget.AbsListView.onLayout(AbsListView.java:2087) 01-27
> 14:15:43.664  25244-25244/als.chaterix W/System.err﹕ at
> android.view.View.layout(View.java:14841) 01-27 14:15:43.664 
> 25244-25244/als.chaterix W/System.err﹕ at
> android.view.ViewGroup.layout(ViewGroup.java:4631) 01-27 14:15:43.664 
> 25244-25244/als.chaterix W/System.err﹕ at
> android.widget.FrameLayout.layoutChildren(FrameLayout.java:453) 01-27
> 14:15:43.664  25244-25244/als.chaterix W/System.err﹕ at
> android.widget.FrameLayout.onLayout(FrameLayout.java:388) 01-27
> 14:15:43.664  25244-25244/als.chaterix W/System.err﹕ at
> android.view.View.layout(View.java:14841) 01-27 14:15:43.664 
> 25244-25244/als.chaterix W/System.err﹕ at
> android.view.ViewGroup.layout(ViewGroup.java:4631) 01-27 14:15:43.664 
> 25244-25244/als.chaterix W/System.err﹕ at
> android.widget.FrameLayout.layoutChildren(FrameLayout.java:453) 01-27
> 14:15:43.664  25244-25244/als.chaterix W/System.err﹕ at
> android.widget.FrameLayout.onLayout(FrameLayout.java:388) 01-27
> 14:15:43.664  25244-25244/als.chaterix W/System.err﹕ at
> android.view.View.layout(View.java:14841) 01-27 14:15:43.664 
> 25244-25244/als.chaterix W/System.err﹕ at
> android.view.ViewGroup.layout(ViewGroup.java:4631) 01-27 14:15:43.664 
> 25244-25244/als.chaterix W/System.err﹕ at
> android.widget.FrameLayout.layoutChildren(FrameLayout.java:453) 01-27
> 14:15:43.664  25244-25244/als.chaterix W/System.err﹕ at
> android.widget.FrameLayout.onLayout(FrameLayout.java:388) 01-27
> 14:15:43.664  25244-25244/als.chaterix W/System.err﹕ at
> android.view.View.layout(View.java:14841) 01-27 14:15:43.664 
> 25244-25244/als.chaterix W/System.err﹕ at
> android.view.ViewGroup.layout(ViewGroup.java:4631) 01-27 14:15:43.664 
> 25244-25244/als.chaterix W/System.err﹕ at
> android.widget.LinearLayout.setChildFrame(LinearLayout.java:1671)
> 01-27 14:15:43.664  25244-25244/als.chaterix W/System.err﹕ at
> android.widget.LinearLayout.layoutVertical(LinearLayout.java:1525)
> 01-27 14:15:43.664  25244-25244/als.chaterix W/System.err﹕ at
> android.widget.LinearLayout.onLayout(LinearLayout.java:1434) 01-27
> 14:15:43.664  25244-25244/als.chaterix W/System.err﹕ at
> android.view.View.layout(View.java:14841) 01-27 14:15:43.664 
> 25244-25244/als.chaterix W/System.err﹕ at
> android.view.ViewGroup.layout(ViewGroup.java:4631) 01-27 14:15:43.664 
> 25244-25244/als.chaterix W/System.err﹕ at
> android.widget.FrameLayout.layoutChildren(FrameLayout.java:453) 01-27
> 14:15:43.664  25244-25244/als.chaterix W/System.err﹕ at
> android.widget.FrameLayout.onLayout(FrameLayout.java:388) 01-27
> 14:15:43.664  25244-25244/als.chaterix W/System.err﹕ at
> android.view.View.layout(View.java:14841) 01-27 14:15:43.664 
> 25244-25244/als.chaterix W/System.err﹕ at
> android.view.ViewGroup.layout(ViewGroup.java:4631) 01-27 14:15:43.664 
> 25244-25244/als.chaterix W/System.err﹕ at
> android.widget.FrameLayout.layoutChildren(FrameLayout.java:453) 01-27
> 14:15:43.674  25244-25244/als.chaterix W/System.err﹕ at
> android.widget.FrameLayout.onLayout(FrameLayout.java:388) 01-27
> 14:15:43.674  25244-25244/als.chaterix W/System.err﹕ at
> android.view.View.layout(View.java:14841) 01-27 14:15:43.674 
> 25244-25244/als.chaterix W/System.err﹕ at
> android.view.ViewGroup.layout(ViewGroup.java:4631) 01-27 14:15:43.674 
> 25244-25244/als.chaterix W/System.err﹕ at
> android.widget.LinearLayout.setChildFrame(LinearLayout.java:1671)
> 01-27 14:15:43.674  25244-25244/als.chaterix W/System.err﹕ at
> android.widget.LinearLayout.layoutVertical(LinearLayout.java:1525)
> 01-27 14:15:43.674  25244-25244/als.chaterix W/System.err﹕ at
> android.widget.LinearLayout.onLayout(LinearLayout.java:1434) 01-27
> 14:15:43.674  25244-25244/als.chaterix W/System.err﹕ at
> android.view.View.layout(View.java:14841) 01-27 14:15:43.674 
> 25244-25244/als.chaterix W/System.err﹕ at
> android.view.ViewGroup.layout(ViewGroup.java:4631) 01-27 14:15:43.674 
> 25244-25244/als.chaterix W/System.err﹕ at
> android.widget.FrameLayout.layoutChildren(FrameLayout.java:453) 01-27
> 14:15:43.674  25244-25244/als.chaterix W/System.err﹕ at
> android.widget.FrameLayout.onLayout(FrameLayout.java:388) 01-27
> 14:15:43.674  25244-25244/als.chaterix W/System.err﹕ at
> android.view.View.layout(View.java:14841) 01-27 14:15:43.674 
> 25244-25244/als.chaterix W/System.err﹕ at
> android.view.ViewGroup.layout(ViewGroup.java:4631) 01-27 14:15:43.674 
> 25244-25244/als.chaterix W/System.err﹕ at
> android.view.ViewRootImpl.performLayout(ViewRootImpl.java:1986) 01-27
> 14:15:43.674  25244-25244/als.chaterix W/System.err﹕ at
> android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1743)
> 01-27 14:15:43.674  25244-25244/als.chaterix W/System.err﹕ at
> android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:996) 01-27
> 14:15:43.674  25244-25244/als.chaterix W/System.err﹕ at
> android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5603)
> 01-27 14:15:43.674  25244-25244/als.chaterix W/System.err﹕ at
> android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
> 01-27 14:15:43.674  25244-25244/als.chaterix W/System.err﹕ at
> android.view.Choreographer.doCallbacks(Choreographer.java:574) 01-27
> 14:15:43.674  25244-25244/als.chaterix W/System.err﹕ at
> android.view.Choreographer.doFrame(Choreographer.java:544) 01-27
> 14:15:43.674  25244-25244/als.chaterix W/System.err﹕ at
> android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
> 01-27 14:15:43.674  25244-25244/als.chaterix W/System.err﹕ at
> android.os.Handler.handleCallback(Handler.java:733) 01-27 14:15:43.674
> 25244-25244/als.chaterix W/System.err﹕ at
> android.os.Handler.dispatchMessage(Handler.java:95) 01-27 14:15:43.674
> 25244-25244/als.chaterix W/System.err﹕ at
> android.os.Looper.loop(Looper.java:136) 01-27 14:15:43.674 
> 25244-25244/als.chaterix W/System.err﹕ at
> android.app.ActivityThread.main(ActivityThread.java:5146) 01-27
> 14:15:43.674  25244-25244/als.chaterix W/System.err﹕ at
> java.lang.reflect.Method.invokeNative(Native Method) 01-27
> 14:15:43.674  25244-25244/als.chaterix W/System.err﹕ at
> java.lang.reflect.Method.invoke(Method.java:515) 01-27 14:15:43.674 
> 25244-25244/als.chaterix W/System.err﹕ at
> com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:796)
> 01-27 14:15:43.674  25244-25244/als.chaterix W/System.err﹕ at
> com.android.internal.os.ZygoteInit.main(ZygoteInit.java:612) 01-27
> 14:15:43.674  25244-25244/als.chaterix W/System.err﹕ at
> dalvik.system.NativeStart.main(Native Method)

1 个答案:

答案 0 :(得分：2)

  1. SimpleDateFormat sdf = new SimpleDateFormat("yyy-MM-dd hh:mm:ss");缺少“y”（yyyy）。
  2. 在turnOut = sdf1.format(date);中：参数应为date2（日期对象）
  3. 你的列表视图在滚动时会滞后，因为你没有回收视图。检查是否convertView != null并使用ViewHolder Recycle Views in adapter
  4. 您应该考虑使用RecyclerView代替ListView
  5. Today是否有效？：我的意思是这句话：if (c.getTime().equals(new java.util.Date()))因为新的Date（）会在调用发生时创建一个具有当前当前毫秒数的新Date对象。如果您今天在12:51:39调用它，则日期对象将不等于五秒钟后创建的日期对象。
  6. yesterday.add(Calendar.DAY_OF_MONTH, -1);：这不是昨天，这是一个月前。
  7. 您确定/已经调试/打印过logcat的值 ((HashMap<String, String>)values.get(position)).get("time"))，只是为了确保该值与前一个值不同。
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