Question

你能为每个对象设置一个标签吗？我在自定义适配器类中有一个getView方法，我想将几个数据传递给我的onClick函数。我能够传递一个String罚款，但我也想传递位置变量而无法弄清楚如何

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View row = convertView;
        if (row == null) {
            LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            row = inflater.inflate(R.layout.screen_grid_date, parent, false);
        }

        gridcell = (Button) row.findViewById(R.id.calendarDayButton);
        gridcell.setOnClickListener(this);

        gridcell.setTag("October");//This one gets passed fine
        gridcell.setTag(position);//How can I pass this one as well??


        return row;
    }

    @Override
    public void onClick(View view) {
        String getString = (String) view.getTag();
        int getInt = (int) view.getTag();
        selectedDay.setText(getString);
}

我尝试为标记设置索引，如：

        gridcell.setTag(1, "October");
        gridcell.setTag(2, position);

但应用程序一直崩溃：

10-05 16:02:05.599  14723-14723/com.markfeldman.mycalendar E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.markfeldman.mycalendar, PID: 14723
java.lang.IllegalArgumentException: The key must be an application-specific resource id.
        at android.view.View.setTag(View.java:17297)
        at com.markfeldman.mycalendar.GridCellAdapter.getView(GridCellAdapter.java:173)
        at android.widget.AbsListView.obtainView(AbsListView.java:2347)
        at android.widget.GridView.onMeasure(GridView.java:1060)
        at android.view.View.measure(View.java:17547)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5535)
        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
        at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
        at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
        at android.view.View.measure(View.java:17547)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5535)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
        at android.view.View.measure(View.java:17547)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5535)
        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
        at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
        at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
        at android.view.View.measure(View.java:17547)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5535)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
        at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2615)
        at android.view.View.measure(View.java:17547)
        at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2015)
        at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1173)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1379)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1061)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5885)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
        at android.view.Choreographer.doCallbacks(Choreographer.java:580)
        at android.view.Choreographer.doFrame(Choreographer.java:550)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
        at android.os.Handler.handleCallback(Handler.java:739)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:135)
        at android.app.ActivityThread.main(ActivityThread.java:5257)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)

Answer 1

我想你有两个选择。您可以创建一个POJO，其中包含您要传递给View的所有数据，然后调用View#setTag(yourPojo)。

或者，您可以在视图上设置多个标记（正如您一直尝试的那样）。问题是View#setTag(int, Object)的第一个参数不仅仅是一个简单的int，它实际上必须是ID中指定的SDK docs：

指定的密钥应该是在资源中声明的id 应用程序以确保它是唯一的（请参阅ID资源类型）。

幸运的是，定义新ID相当容易，上面的链接很好地描述了这个过程。

使用标签在方法之间传递数据

1 个答案: