Question

我试图将TextView从解析查询传递给Adapter，并设置列表适配器。课程UserAdapter从BaseAdapter延伸。我希望ListView再显示一个String / int（使用另一个TextView）。我怎么能这样做？

我的代码：
将UserAdapter设置为ListView：

uList = new ArrayList<ParseUser>(li);
ListView list = (ListView) findViewById(R.id.list);
list.setAdapter(new UserAdapter());

UserAdapter class：

private class UserAdapter extends BaseAdapter {

    @Override
    public int getCount() {
        return uList.size();
    }

    @Override
    public ParseUser getItem(int arg0) {
        return uList.get(arg0);
    }

    @Override
    public long getItemId(int arg0) {
        return arg0;
    }

    // How would I add another string when using `getView`?
    @Override
    public View getView(int pos, View v, ViewGroup arg2) {
        if (v == null) {
            v = getLayoutInflater().inflate(R.layout.chat_item, null);
        }

        // I need to add another 'TextView' here.
        ParseUser c = getItem(pos);
        TextView lbl = (TextView) v;
        lbl.setText(c.getUsername());
        lbl.setCompoundDrawablesWithIntrinsicBounds(
                c.getBoolean("online") ? R.drawable.ic_online
                        : R.drawable.ic_offline, 0, R.drawable.arrow, 0);

        return v;
    }
}

下面是chat_item.xml。 .xml TextView getView设置TextView 如何在此处添加其他<?xml version="1.0" encoding="utf-8"?> <TextView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:drawableRight="@drawable/arrow" android:orientation="horizontal" android:padding="@dimen/pad_10dp" android:text="TextView" android:textColor="@color/main_color_gray_dk" android:textSize="@dimen/pad_30dp" android:drawableLeft="@drawable/ic_online" android:drawablePadding="@dimen/pad_10dp" />？

SELECT id, fixed_position, intvalue (calculated in a subquery)
FROM content_items
ORDER BY intvalue DESC

Answer 1

使用ViewGroup作为TextView的父视图。在您的情况下，LinearLayout或RelativeLayout可能效果最佳。

以下是一个例子：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout  xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >

    <TextView 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:drawableRight="@drawable/arrow"
        android:orientation="horizontal"
        android:padding="@dimen/pad_10dp"
        android:text="TextView"
        android:id="@+id/textView1"
        android:textColor="@color/main_color_gray_dk"
        android:textSize="@dimen/pad_30dp"
        android:drawableLeft="@drawable/ic_online"
        android:drawablePadding="@dimen/pad_10dp" />

    <TextView 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:padding="@dimen/pad_10dp"
        android:text="TextView2"
        android:id="@+id/textView2"
        android:textColor="@color/main_color_gray_dk"
        android:textSize="@dimen/pad_30dp"
        android:drawableLeft="@drawable/ic_online"
        android:drawablePadding="@dimen/pad_10dp" />
</LinearLayout>

Answer 2

@ user370305陈述了XML部分。我将描述Java部分。在夸大该XML文件后，然后：

// Grab a reference to the first TextView
TextView lbl1 = (TextView) v.findViewById(R.id.textview1);

// Grab a reference to the second TextView
TextView lbl2 = (TextView) v.findViewById(R.id.textview2);

// Do stuff with 'lbl1' and 'lbl2'

将TextView添加到扩展BaseAdapter的适配器

2 个答案: