0
这可能看起来很奇怪,但我试图显示我在列表视图项目上创建的自定义视图。 我的自定义视图平键盘和弦,当我告诉他们在这个FragmentActivity工作, ViewPager,等我做了,因为我曾做过,创建一个XML文件作为列表项,实现从ArrayAdapter扩展一个类 。当我膨胀一个XML文件时,它工作得很好,但是当我使用我的自定义视图类时,它不起作用 ,它没有xml文件。你们有什么线索吗?我的代码如下。非常感谢:)在列表项视图中显示自定义视图
public class ShowChordActivityNew extends Activity {
private ListView chordList;
private List<KeyboardChordDiagram> aList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_show_chord_activity_new);
chordList = (ListView) findViewById(R.id.lvChords);
// this array is a chord I'm using to test this before moving to my working code
int[] chord = new int[] { 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
aList = new ArrayList<KeyboardChordDiagram>();
aList.add(new KeyboardChordDiagram(getApplicationContext(), "A", chord));
aList.add(new KeyboardChordDiagram(getApplicationContext(), "A", chord));
aList.add(new KeyboardChordDiagram(getApplicationContext(), "A", chord));
chordList.setAdapter(new MyAdpater());
}
private class MyAdpater extends ArrayAdapter<KeyboardChordDiagram> {
public MyAdpater() {
super(getApplicationContext(), R.layout.fragment_list_item, aList);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View itemView = convertView;
if (itemView == null) {
//since my class extends View, this should work, right?
KeyboardChordDiagram a = aList.get(position);
itemView = a;
}
return itemView;
}
}
}
//这里是我的KeyboardChordDiagram类的构造函数 公共类KeyboardChordDiagram扩展ChordDiagram { .....
public KeyboardChordDiagram(Context context, String aChordName, int[] aChord) {
super(context, aChordName);
chord = aChord;
.....
}
....
}
//这里的ChordDiagram类:
公共抽象类ChordDiagram扩展视图实现OnClickListener {
.....
public ChordDiagram(Context context, String aChordName) {
super(context);
.....
}
....
}
请出示'KeyboardChordDiagram'类,或至少它的构造。您应该在'getView'函数内创建新的'KeyboardChordDiagram'。你的问题是你没有建立和弦与列表的父/子关系。 – frozenkoi
我编辑了这个问题来添加construtor。我正在努力理解我应该如何将和弦与列表绑定在一起。我试图在getView()方法中实例化一个KeyboardChordDiagram,传递getContext()作为参数,但它没有工作:( –