[英]Why won't my SVG image display on my Galaxy Nexus?
I'm trying to have one image be a background for another, using the svg-android library. 我正在尝试使用svg-android库将一个图像作为另一个图像的背景。 When I view the image on my Samsung Galaxy Nexus (4.3, Sprint), the background image doesn't display. 当我在Samsung Galaxy Nexus(4.3,Sprint)上查看图像时,背景图像不显示。 When I view it on the emulator, it's there correctly. 当我在模拟器上查看它时,它正确存在。 I've even removed the foreground, and this stays the same. 我什至删除了前景,并且保持不变。 Here's the key parts of the XML layout: 这是XML布局的关键部分:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:ads="http://schemas.android.com/apk/lib/com.google.ads"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<com.kd7uiy.hamfinder.SvgView
android:id="@+id/svgImage"
android:src="@raw/paper"
android:layout_alignLeft="@+id/scroll"
android:layout_alignRight="@id/scroll"
android:layout_alignTop="@id/scroll"
android:layout_above="@+id/buttons"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<ScrollView
android:id="@+id/scroll"
android:scrollbars="none"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="@+id/buttons"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:background="@android:color/transparent"
android:layout_below="@id/adView">
<TableLayout
android:id="@+id/tableView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:shrinkColumns="1"
android:stretchColumns="1"
/>
</ScrollView>
</RelativeLayout>
And the custom class. 和自定义类。 Note I tried a tip from svg-android without luck: 注意我尝试了svg-android的技巧而没有运气:
public class SvgView extends View {
Picture picture;
long startTime;
float scaleFactor;
public SvgView(Context context,AttributeSet attrs) {
super(context,attrs);
setImage(attrs.getAttributeResourceValue("http://schemas.android.com/apk/res/android","src", 0));
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB)
{
disableHardwareAcceleration();
}
}
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
private void disableHardwareAcceleration()
{
setLayerType(View.LAYER_TYPE_SOFTWARE, null);
}
public SvgView(Context context) {
super(context);
}
public void setImage(int img_resource)
{
// Parse the SVG file from the resource
SVG svg = SVGParser.getSVGFromResource(getResources(),img_resource);
picture = svg.getPicture();
}
public void onDraw(Canvas canvas) {
if (picture!=null)
{
scaleFactor=Math.min((float)getHeight()/picture.getHeight(),(float)getWidth()/picture.getWidth());
canvas.scale((float)scaleFactor,(float)scaleFactor);
canvas.drawPicture(picture);
}
}
}
Lastly, here's the image from my Galaxy Nexus, and the emulator. 最后,这是我的Galaxy Nexus和模拟器的图片。 Note the difference in the background. 注意背景的不同。
It turns out the provided tip was in the right direction, but I had a small typo. 事实证明,所提供的提示方向正确,但我有一个小的错字。 The hardware acceleration seems to be the culprit. 硬件加速似乎是罪魁祸首。 As I don't have anything that complex, disabling it is just fine. 由于我没有那么复杂,禁用它就可以了。 I almost had the right solution, just had the wrong comparitor. 我几乎有正确的解决方案,只是有错误的比较器。 Changing the code as follows fixes it: 如下更改代码即可解决:
public SvgView(Context context,AttributeSet attrs) {
super(context,attrs);
setImage(attrs.getAttributeResourceValue("http://schemas.android.com/apk/res/android","src", 0));
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB)
{
disableHardwareAcceleration();
}
}
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