自定义的控件，在用findViewById获取id是获取的到时null,为什么啊？
控件：
public class LyricView extends TextView {
public LyricView(Context context) {
super(context);
// TODO Auto-generated constructor stub
}
public LyricView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}
public LyricView(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}
}
xml:
<com.sample.andorid.LyricView android:name = "@+id/lyric_show"
android:layout_width="fill_parent"
android:layout_height="220dip">
</com.sample.android.LyricView>
Activity 中引用：
在onCreat()函数中：
mLyricView =(LyricView)findViewById(R.id.lyric_show);
System.out.println("<-------The mLyricView is ------->" + mLyricView);
mLyricView.setText("hello world");
执行到这句是报错，打印出来是null.我大概知道LyricView要实例化，但是我不知道如何实例化！求高手指点，谢谢！
[解决办法]
<com.sample.andorid.LyricView android:name = "@+id/lyric_show"
android:layout_width="fill_parent"
android:layout_height="220dip">
</com.sample.android.LyricView>
改为
<com.sample.andorid.LyricView android:id = "@+id/lyric_show"
android:layout_width="fill_parent"
android:layout_height="220dip">
</com.sample.android.LyricView>
