【发布时间】：2015-09-12 10:47:36
【问题描述】：
我搜索了网络，特别是这个网站，但我还没有找到我的问题的答案。
我的目标：我有一个包含一些元素的 ListView，一个是 ImageButton。我想根据存储在本地 SQLite 数据库中的数据动态设置此按钮的图像。
这里是sn-ps的代码：
将可绘制图像保存在数据库中：
e.setBild(R.drawable.goal_icon);
如您所见，我将其保存为整数。根据我的阅读，这就是要走的路。
使用图片：
我认为更重要的部分是，我如何尝试获取可绘制图像。这是我用来填充 ListView 的适配器的一部分：
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater mInflater = (LayoutInflater)
getContext().getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
convertView = mInflater.inflate(R.layout.list_item_actions, null);
}
ImageButton icon = (ImageButton) convertView.findViewById(R.id.icon);
try{
icon.setImageResource(getItem(position).getBild());
}catch(Exception e){
icon.setImageResource(R.drawable.default_icon);
}
'getBild' 方法获取一个整数（很明显）。
他总是去抓，给我default_icon。 这是堆栈跟踪：
09-12 12:22:19.636 23635-23635/android.ht.sportstatistik W/ResourceType﹕ No package identifier when getting value for resource number 0x00000002
09-12 12:22:19.637 23635-23635/android.ht.sportstatistik W/ImageView﹕ Unable to find resource: 2
android.content.res.Resources$NotFoundException: Resource ID #0x2
at android.content.res.Resources.getValue(Resources.java:1307)
at android.content.res.Resources.getDrawable(Resources.java:826)
at android.content.Context.getDrawable(Context.java:403)
at android.widget.ImageView.resolveUri(ImageView.java:747)
at android.widget.ImageView.onMeasure(ImageView.java:874)
at android.view.View.measure(View.java:17637)
at android.widget.RelativeLayout.measureChild(RelativeLayout.java:698)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:482)
at android.view.View.measure(View.java:17637)
at android.widget.ListView.measureScrapChild(ListView.java:1207)
at android.widget.ListView.measureHeightOfChildren(ListView.java:1272)
at android.widget.ListView.onMeasure(ListView.java:1182)
at android.view.View.measure(View.java:17637)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
at android.view.View.measure(View.java:17637)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at android.view.View.measure(View.java:17637)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at android.view.View.measure(View.java:17637)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at android.view.View.measure(View.java:17637)
at android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:851)
at android.view.View.measure(View.java:17637)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at android.view.View.measure(View.java:17637)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
at android.support.v7.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:453)
at android.view.View.measure(View.java:17637)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at android.view.View.measure(View.java:17637)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:722)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:613)
at android.view.View.measure(View.java:17637)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:436)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2618)
at android.view.View.measure(View.java:17637)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2019)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1177)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1383)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1065)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5901)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
at android.view.Choreographer.doCallbacks(Choreographer.java:580)
at android.view.Choreographer.doFrame(Choreographer.java:550)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:211)
at android.app.ActivityThread.main(ActivityThread.java:5373)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.in
我错过了什么吗？提前致谢！
【问题讨论】：
-
这个函数返回什么 icon.setImageResource(getItem(position).getBild());
-
我认为您是在要求 android 获取不在 R 文件中/不在您的 apk 中的资源。
-
getItem(position).getBild()是否返回 int 资源 id 或某个 int 值？我很确定那一秒……那你期待什么？ -
好吧，用 setBild(R.drawable.goal_icon);我应该将其保存为资源 ID，不是吗？
标签： android sqlite android-drawable listadapter android-imagebutton