我设法将布局添加到我的ViewFlipper中,但是,它被加载为空白。
代码是
Resources packageResources;
Context packageContext;
try
{
packageResources = pm.getResourcesForApplication(packageName);
packageContext = this.createPackageContext(packageName, Context.CONTEXT_INCLUDE_CODE + Context.CONTEXT_IGNORE_SECURITY);
}
catch(NameNotFoundException excep)
{
// the package does not exist. move on to see if another exists.
}
Class layoutClass;
try
{
// using reflection to get the layout class inside the R class of the package
layoutClass = packageContext.getClassLoader().loadClass(packageName + ".R$layout");
}
catch (ClassNotFoundException excep1)
{
// Less chances that class won't be there.
}
for( Field layoutID : layoutClass.getFields() )
{
try
{
int id = layoutID.getInt(layoutClass);
XmlResourceParser xmlResourceLayout = packageResources.getLayout(id);
View v = new View(this, Xml.asAttributeSet(xmlResourceLayout));
this.viewFlipper.addView(v);
}
catch (Exception excep)
{
continue;
}
}
我没有任何错误,我进行了调试和检查。布局ID是正确的。但是,在我的ViewFlipper中,它只是空白。我无法找到任何警告或错误。
终于得到了。...它实际上很简单!!!!
这是我所做的...
-
在目标APK中,只有没有应用程序或活动代码的资源和布局。我创建了一个课程,
public final class ViewExtractor { private static final int NUMBER_OF_LAYOUTS = 5; public static View[] getAllViews(Context context) { View[] result = new View[ViewExtractor.NUMBER_OF_LAYOUTS]; result[0] = View.inflate(context, R.layout.layout_0, null); result[1] = View.inflate(context, R.layout.layout_1, null); result[2] = View.inflate(context, R.layout.layout_2, null); result[3] = View.inflate(context, R.layout.layout_3, null); result[4] = View.inflate(context, R.layout.layout_4, null); return result; } }
然后,在当前的应用程序中,我修改了早期的代码。修改将在验证软件包存在后进行。
// If the package exists then get the resources within it.
// Use the method in the class to get the views.
Class<?> viewExtractor;
try
{
viewExtractor = packageContext.getClassLoader().loadClass(packageName + ".ViewExtractor");
}
catch (ClassNotFoundException excep)
{
continue;
}
View[] resultViews;
try
{
Method m = viewExtractor.getDeclaredMethod("getAllViews", Context.class);
resultViews= (View[])m.invoke(null, new Object[]{packageContext});
for( View v : resultViews)
{
this.viewFlipper.addView(v);
}
}
catch (Exception excep)
{
excep.printStackTrace();
}
您没有夸大布局。您正在创建一个空的View
并将其添加到ViewFlipper
。
我目前正在这样做。它仅在知道应提供布局层次结构的.APK的活动或片段的包装时起作用(我称之为外部上下文)。您需要知道要夸大的布局的名称(例如R.Layout.MylayOut->" mylayout")
Context c = createPackageContext(foreignPackageName,
Context.CONTEXT_INCLUDE_CODE|Context.CONTEXT_IGNORE_SECURITY); //create foreign context
int resId = c.getResources.getIdentifier(mylayoutName,"layout",foreignPackageName);
LayoutInflater myInflater = LayoutInflater.from(c); //Inflater for foreign context
View myLayout = myInflater.inflate(resId,null,false); //do not attach to a root view