我有一个字节数组,其中包含从网络获取的图像。我正在使用Bitmapfactory、BitmapDrawable和setImageDrawable在我的UI活动上懒加载它们(或者至少我正在尝试:D)。这是我的代码:
RelativeLayout r =(RelativeLayout) adap.getGroupView(Integer.parseInt(groupPos), false, null, null);
ImageView iv = (ImageView) r.findViewById(R.id.imgGruppo);
Log.w("",""+raw_img.length);
Bitmap bm = BitmapFactory.decodeByteArray(raw_img, 0, raw_img.length);
Drawable drawable = new BitmapDrawable(bm);
Log.i("","pre setimage");
iv.setImageDrawable(drawable);
//added for testing only, with no effects.
//((ELA) Activity_Titoli_2.this.getExpandableListAdapter()).notifyDataSetChanged();
//ELA is my expandable list adapter
Log.i("","post setimage"+bm.getRowBytes()); //just to see that i have actual data in raw_img and such
这里涉及到的是XML
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linearLayoutTitoli2_gruppo"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/textNomeGruppo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="Large Text"
android:textColor="#FF0000"
android:padding="14dp"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/textNoteGruppo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/textNomeGruppo"
android:paddingLeft="14dp"
android:paddingRight="14dp"
android:paddingBottom="7dp"
android:text="Small Text"
android:textAppearance="?android:attr/textAppearanceSmall" />
<ImageView
android:id="@+id/imgGruppo"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_alignParentRight="true"
android:src="@drawable/icon"
/>
</RelativeLayout>
我添加了"android:src..."只是为了检查ImageView是否可见,它确实可见。唯一的问题是我无法更改它! 我尝试使用setImageBitmap,仅使用我创建的位图;我尝试使用setimageDrawable创建一个BitmapDrawable,但没有效果。没有错误,什么都没有。 请问,哪里出错了?谢谢。