Java 充气布局内部线性布局
在我正在开发的应用程序中,我在屏幕的左右边缘都有一个带有图标的菜单,它包含在应用程序的所有活动中 我所做的是首先创建“MenuView”类(它可以扩展View、RelativeLayout或其他内容),其中定义了所有菜单图标及其onClickListener。然后是这个类的布局。在布局中,我设置了2个线性布局,每一个都在屏幕的边框上(这些是指菜单)和一个带有列内空白空间的线性布局,其中其他活动必须进行。 menuviewaActivity.javaJava 充气布局内部线性布局,java,android,android-layout,Java,Android,Android Layout,在我正在开发的应用程序中,我在屏幕的左右边缘都有一个带有图标的菜单,它包含在应用程序的所有活动中 我所做的是首先创建“MenuView”类(它可以扩展View、RelativeLayout或其他内容),其中定义了所有菜单图标及其onClickListener。然后是这个类的布局。在布局中,我设置了2个线性布局,每一个都在屏幕的边框上(这些是指菜单)和一个带有列内空白空间的线性布局,其中其他活动必须进行。 menuviewaActivity.java public class MenuViewAc
public class MenuViewActivity extends {
public MenuViewActivity(Context context, AttributeSet attrs) {
super(context, attrs);
...
((ImageView)this.findViewById(R.id.navButton)).setOnClickListener(launch_nav);
final OnClickListener launch_nav = new OnClickListener() {
@Override
public void onClick(View v) {
getBaseContext().startActivity(new Intent(getBaseContext(), Navigation.class));
}
};
...
public class MainClass extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
super.onCreate(savedInstanceState);
LinearLayout inside_menu_view = (LinearLayout)findViewById(R.id.activitycontent);
View this_layout = getLayoutInflater().inflate(R.layout.main, inside_menu_view);
inside_menu_view.addView(this_layout);
菜单_view.xml
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.MenuViewActivity" >
<!-- Shows custom time titlebar -->
<include
layout="@layout/custom_tittlebar" >
</include>
<!-- Button columns -->
<LinearLayout
android:id="@+id/lefthandmenu"
android:layout_width="85dip"
android:layout_height="match_parent"
android:layout_below="@id/title"
android:layout_alignParentLeft="true"
android:orientation="vertical"
android:background="@drawable/border_cut" >
<ImageView
... />
...
</LinearLayout>
<LinearLayout
android:id="@+id/righthandmenu"
android:layout_width="85dip"
android:layout_height="match_parent"
android:layout_below="@id/title"
android:layout_alignParentRight="true"
android:orientation="vertical"
android:background="@drawable/border_cut" >
<ImageView
... />
...
</LinearLayout>
<!-- Blank space which will contain other activities -->
<LinearLayout
android:id="@+id/activitycontent"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_toLeftOf="@id/righthandmenu"
android:layout_toRightOf="@id/lefthandmenu"
android:layout_below="@id/title"
android:orientation="vertical" >
</LinearLayout>
但我在logcat上发现一个错误:
更新-修改后仍不起作用,这是LogCat
10-31 09:35:17.521: E/AndroidRuntime(1676): FATAL EXCEPTION: main
10-31 09:35:17.521: E/AndroidRuntime(1676): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example/com.example.MainClass}: android.view.InflateException: Binary XML file line #12: Error inflating class com.example.MenuViewActivity
10-31 09:35:17.521: E/AndroidRuntime(1676): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
10-31 09:35:17.521: E/AndroidRuntime(1676): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
10-31 09:35:17.521: E/AndroidRuntime(1676): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
10-31 09:35:17.521: E/AndroidRuntime(1676): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
10-31 09:35:17.521: E/AndroidRuntime(1676): at android.os.Handler.dispatchMessage(Handler.java:99)
10-31 09:35:17.521: E/AndroidRuntime(1676): at android.os.Looper.loop(Looper.java:130)
10-31 09:35:17.521: E/AndroidRuntime(1676): at android.app.ActivityThread.main(ActivityThread.java:3683)
10-31 09:35:17.521: E/AndroidRuntime(1676): at java.lang.reflect.Method.invokeNative(Native Method)
10-31 09:35:17.521: E/AndroidRuntime(1676): at java.lang.reflect.Method.invoke(Method.java:507)
10-31 09:35:17.521: E/AndroidRuntime(1676): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
10-31 09:35:17.521: E/AndroidRuntime(1676): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
10-31 09:35:17.521: E/AndroidRuntime(1676): at dalvik.system.NativeStart.main(Native Method)
10-31 09:35:17.521: E/AndroidRuntime(1676): Caused by: android.view.InflateException: Binary XML file line #12: Error inflating class com.example.MenuViewActivity
10-31 09:35:17.521: E/AndroidRuntime(1676): at android.view.LayoutInflater.createView(LayoutInflater.java:518)
10-31 09:35:17.521: E/AndroidRuntime(1676): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:570)
10-31 09:35:17.521: E/AndroidRuntime(1676): at android.view.LayoutInflater.rInflate(LayoutInflater.java:623)
10-31 09:35:17.521: E/AndroidRuntime(1676): at android.view.LayoutInflater.inflate(LayoutInflater.java:408)
10-31 09:35:17.521: E/AndroidRuntime(1676): at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
10-31 09:35:17.521: E/AndroidRuntime(1676): at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
10-31 09:35:17.521: E/AndroidRuntime(1676): at com.masermic.medialauncher.LauncherActivity.onCreate(LauncherActivity.java:67)
10-31 09:35:17.521: E/AndroidRuntime(1676): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
10-31 09:35:17.521: E/AndroidRuntime(1676): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
10-31 09:35:17.521: E/AndroidRuntime(1676): ... 11 more
10-31 09:35:17.521: E/AndroidRuntime(1676): Caused by: java.lang.reflect.InvocationTargetException
10-31 09:35:17.521: E/AndroidRuntime(1676): at java.lang.reflect.Constructor.constructNative(Native Method)
10-31 09:35:17.521: E/AndroidRuntime(1676): at java.lang.reflect.Constructor.newInstance(Constructor.java:415)
10-31 09:35:17.521: E/AndroidRuntime(1676): at android.view.LayoutInflater.createView(LayoutInflater.java:505)
10-31 09:35:17.521: E/AndroidRuntime(1676): ... 19 more
10-31 09:35:17.521: E/AndroidRuntime(1676): Caused by: java.lang.NullPointerException
10-31 09:35:17.521: E/AndroidRuntime(1676): at com.mexample.MenuViewActivity.<init>(MenuViewActivity.java:55)
10-31 09:35:17.521: E/AndroidRuntime(1676): ... 22 more
10-3109:35:17.521:E/AndroidRuntime(1676):致命异常:main
10-31 09:35:17.521:E/AndroidRuntime(1676):java.lang.RuntimeException:无法启动活动组件信息{com.example/com.example.MainClass}:android.view.InflateException:二进制XML文件行#12:膨胀类com.example.menuviewaActivity时出错
10-31 09:35:17.521:E/AndroidRuntime(1676):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
10-31 09:35:17.521:E/AndroidRuntime(1676):在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
10-31 09:35:17.521:E/AndroidRuntime(1676):在android.app.ActivityThread.access$1500(ActivityThread.java:117)
10-31 09:35:17.521:E/AndroidRuntime(1676):在android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
10-31 09:35:17.521:E/AndroidRuntime(1676):在android.os.Handler.dispatchMessage(Handler.java:99)上
10-31 09:35:17.521:E/AndroidRuntime(1676):在android.os.Looper.loop(Looper.java:130)
10-31 09:35:17.521:E/AndroidRuntime(1676):位于android.app.ActivityThread.main(ActivityThread.java:3683)
10-31 09:35:17.521:E/AndroidRuntime(1676):位于java.lang.reflect.Method.Invokenactive(本机方法)
10-31 09:35:17.521:E/AndroidRuntime(1676):位于java.lang.reflect.Method.invoke(Method.java:507)
10-31 09:35:17.521:E/AndroidRuntime(1676):在com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
10-31 09:35:17.521:E/AndroidRuntime(1676):位于com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
10-31 09:35:17.521:E/AndroidRuntime(1676):在dalvik.system.NativeStart.main(本机方法)
10-31 09:35:17.521:E/AndroidRuntime(1676):由以下原因引起:android.view.InflateException:二进制XML文件行#12:错误膨胀类com.example.MenuViewActivity
10-31 09:35:17.521:E/AndroidRuntime(1676):在android.view.LayoutInflater.createView(LayoutInflater.java:518)
10-31 09:35:17.521:E/AndroidRuntime(1676):在android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:570)
10-31 09:35:17.521:E/AndroidRuntime(1676):在android.view.LayoutInflater.rInflate(LayoutInflater.java:623)
10-31 09:35:17.521:E/AndroidRuntime(1676):在android.view.LayoutInflater.inflate(LayoutInflater.java:408)
10-31 09:35:17.521:E/AndroidRuntime(1676):在android.view.LayoutInflater.inflate(LayoutInflater.java:320)
10-31 09:35:17.521:E/AndroidRuntime(1676):在android.view.LayoutInflater.inflate(LayoutInflater.java:276)
10-31 09:35:17.521:E/AndroidRuntime(1676):位于com.masermic.mediauncher.launchectivity.onCreate(launchectivity.java:67)
10-31 09:35:17.521:E/AndroidRuntime(1676):在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)上
10-31 09:35:17.521:E/AndroidRuntime(1676):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
10-31 09:35:17.521:E/AndroidRuntime(1676):。。。还有11个
10-31 09:35:17.521:E/AndroidRuntime(1676):由以下原因引起:java.lang.reflect.InvocationTargetException
10-31 09:35:17.521:E/AndroidRuntime(1676):位于java.lang.reflect.Constructor.constructNative(本机方法)
10-31 09:35:17.521:E/AndroidRuntime(1676):位于java.lang.reflect.Constructor.newInstance(Constructor.java:415)
10-31 09:35:17.521:E/AndroidRuntime(1676):在android.view.LayoutInflater.createView(LayoutInflater.java:505)
10-31 09:35:17.521:E/AndroidRuntime(1676):。。。还有19个
10-31 09:35:17.521:E/AndroidRuntime(1676):由以下原因引起:java.lang.NullPointerException
10-31 09:35:17.521:E/AndroidRuntime(1676):在com.mexample.menuviewaActivity(menuviewaActivity.java:55)
10-31 09:35:17.521:E/AndroidRuntime(1676):。。。还有22个
您不能对活动进行充气。您可以充气查看
和导出类型。因此,您的类应该扩展视图
、视图组
或一些派生类
编辑:
关于充气异常,您在自定义视图的第55行获得NPE,可能是因为,R.id.navButton
未在试图充气的布局中声明。您说要更改为公共类菜单ViewActivity extends view
,但在公共类MainClass extends Activity
中,同时用您对代码所做的更改更新您的问题是否希望将MenuViewActivity作为布局的根目录?抱歉@blackbelt我不明白您对布局的根目录的意思。我需要的是首先有MenuViewActivity,在这里我定义菜单的按钮,然后是这个菜单类的布局。在这个布局中设置一个空间来容纳所有其他活动,如MainClass。基本上,我们的想法是在2个菜单栏之间的espace中安装所有其他布局,因为如果我不这样做,菜单栏将覆盖其他布局的一部分。slayout不能包含活动