添加自定义 LinearLayout 时 Android 布局预览器抛出错误
我定义了一个自定义 ViewGroup 来扩展 LinearLayout 的功能:
public class TestLayout extends LinearLayout {
public TestLayout(Context context, AttributeSet attrs) {
super(context, attrs);
LayoutInflater inflater = (LayoutInflater)context.getSystemService
(Context.LAYOUT_INFLATER_SERVICE);
inflater.inflate(R.layout.testlayout, this, true);
}
}
它膨胀的布局 (testlayout.xml) 如下所示:
<?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" android:gravity="center">
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"/>
</LinearLayout>
最后,我在我的 main 中使用这个自定义组件.xml:
<?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" >
<my.test.namespace.TestLayout
android:id="@+id/testLayout1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
</my.test.namespace.TestLayout>
</LinearLayout>
在布局编辑器中查看我的 main.xml 时,eclipse 抛出错误: my.test.namespace.TestLayout 实例化失败。
堆栈跟踪:
android.content.res.Resources$NotFoundException: Could not resolve resource value: 0x7F030001.
at com.android.layoutlib.bridge.android.BridgeResources.throwException(BridgeResources.java:648)
at com.android.layoutlib.bridge.android.BridgeResources.getLayout(BridgeResources.java:270)
at android.view.LayoutInflater.inflate(LayoutInflater.java:318)
at my.test.namespace.TestLayout.<init>(TestLayout.java:18)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.ProjectCallback.instantiateClass(ProjectCallback.java:397)
at com.android.ide.eclipse.adt.internal.editors.layout.ProjectCallback.loadView(ProjectCallback.java:165)
at com.android.layoutlib.bridge.android.BridgeInflater.loadCustomView(BridgeInflater.java:205)
at com.android.layoutlib.bridge.android.BridgeInflater.createViewFromTag(BridgeInflater.java:133)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:618)
at android.view.LayoutInflater.inflate(LayoutInflater.java:407)
0x7F030001 指向 R.java 中的布局 xml 文件。我尝试清理我的项目,但没有任何作用。我是否使用了 LayoutInflater 错误,或者这里发生了什么?
I've defined a custom ViewGroup that extends the functionality of a LinearLayout:
public class TestLayout extends LinearLayout {
public TestLayout(Context context, AttributeSet attrs) {
super(context, attrs);
LayoutInflater inflater = (LayoutInflater)context.getSystemService
(Context.LAYOUT_INFLATER_SERVICE);
inflater.inflate(R.layout.testlayout, this, true);
}
}
The layout it inflates (testlayout.xml) looks like this:
<?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" android:gravity="center">
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"/>
</LinearLayout>
And finally i'm using this custom component in my main.xml:
<?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" >
<my.test.namespace.TestLayout
android:id="@+id/testLayout1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
</my.test.namespace.TestLayout>
</LinearLayout>
When viewing my main.xml in the layout editor, eclipse throws an error:
my.test.namespace.TestLayout failed to instantiate.
And the stacktrace:
android.content.res.Resources$NotFoundException: Could not resolve resource value: 0x7F030001.
at com.android.layoutlib.bridge.android.BridgeResources.throwException(BridgeResources.java:648)
at com.android.layoutlib.bridge.android.BridgeResources.getLayout(BridgeResources.java:270)
at android.view.LayoutInflater.inflate(LayoutInflater.java:318)
at my.test.namespace.TestLayout.<init>(TestLayout.java:18)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.android.ide.eclipse.adt.internal.editors.layout.ProjectCallback.instantiateClass(ProjectCallback.java:397)
at com.android.ide.eclipse.adt.internal.editors.layout.ProjectCallback.loadView(ProjectCallback.java:165)
at com.android.layoutlib.bridge.android.BridgeInflater.loadCustomView(BridgeInflater.java:205)
at com.android.layoutlib.bridge.android.BridgeInflater.createViewFromTag(BridgeInflater.java:133)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:618)
at android.view.LayoutInflater.inflate(LayoutInflater.java:407)
0x7F030001 points to the layout xml file in R.java. I tried cleaning my project, but that did nothing. Am I using the LayoutInflater wrong, or what is going on here?
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