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我想玩android,所以我採取了一些我現有的和修改它。這是一個主 - 細節應用程序,在Eclipse中使用默認設置生成,並且沒有新文件。我把位於COM ..的ItemDetailFragment.java的代碼,並修改它,所以它會得出一些測試在屏幕上(0,0)如何在主細部應用程序中使用畫布繪製文字?
下面是我修改
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_item_detail,
container, false);
//customImageView custom = (customImageView) inflater.inflate(R.layout.fragment_item_detail, container, false);
// Show the dummy content as text in a TextView.
if (mItem != null) {
//((ImageView) rootView.findViewById(R.id.item_detail_)).setImageResource(R.drawable.ic_launcher);
((customImageView) rootView.findViewById(R.id.item_detail__)).invalidate();
}
return rootView;
}
private class customImageView extends View {
/*To clarify I added this class myself b/c the android developer guide on Canvas and Drawables says to*/
public customImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}
@Override
public void onDraw(Canvas canvas) {
canvas.drawText("Some Example Text", 0, 0, new Paint());
}
}
}
哦代碼,這是我的/res/layout/fragment_item_detail.xml與申報
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/item_detail"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="16dp"
android:textIsSelectable="true" />
<!-- Autogenerated -->
<ImageView
android:id="@+id/item_detail_"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<!-- android:src="@drawable/android" /> -->
<!-- I added this in -->
<customImageView
android:id="@+id/item_detail__"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<!-- This is the relevant part, I added this in -->
</LinearLayout>
然而,當應用程序是在模擬器上運行,我得到this big list of errors
能someo ne請幫我理解爲什麼會發生這種情況,以及如何解決這個問題?