android - inflatedView 的问题

Question

我试图膨胀一个 View 作为我的 glSurfaceView 的加载屏幕，同时它在运行时交换纹理(我知道如何在我的 onCreate 期间做到这一点美好的)。它只是一个 RelativeLayout，中间有一个进度条，完成交换后它会消失，但它没有正确膨胀。

inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    loading = inflater.inflate(R.layout.loading,null);
RelativeLayout loadingScreen = (RelativeLayout) findViewById(R.id.loadingScreen);

其中 loadingScreen 是相对布局的 ID。

xml:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/loadingScreen"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#FFFFFF"
    android:visibility="visible" >

    <ProgressBar
        android:id="@+id/progressBar1"
        style="?android:attr/progressBarStyleLarge"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true" >
    </ProgressBar>

    <EditText
        android:id="@+id/editText android:layout_height="
        android:layout_width="wrap_content"
        wrap_content="" >
    </EditText>

</RelativeLayout>

为了进行测试，我在以下附加代码上方添加了一个 EditText 以对其进行测试:

EditText tester = (EditText) findViewById(R.id.editText); //Now we have an object
    tester.setText("dfdfds");

和错误日志:

08-12 15:07:35.630: ERROR/ActivityThread(2502): Failed to inflate
08-12 15:07:35.630: ERROR/ActivityThread(2502): android.view.InflateException: Binary XML file line #5: Error inflating class com.huskybus.CampusMapOpenGL
08-12 15:07:35.630: ERROR/ActivityThread(2502):     at android.view.LayoutInflater.createView(LayoutInflater.java:518)
08-12 15:07:35.630: ERROR/ActivityThread(2502):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:570)
08-12 15:07:35.630: ERROR/ActivityThread(2502):     at android.view.LayoutInflater.rInflate(LayoutInflater.java:623)
08-12 15:07:35.630: ERROR/ActivityThread(2502):     at android.view.LayoutInflater.inflate(LayoutInflater.java:408)
08-12 15:07:35.630: ERROR/ActivityThread(2502):     at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
08-12 15:07:35.630: ERROR/ActivityThread(2502):     at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
08-12 15:07:35.630: ERROR/ActivityThread(2502):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:212)
08-12 15:07:35.630: ERROR/ActivityThread(2502):     at android.app.Activity.setContentView(Activity.java:1657)
08-12 15:07:35.630: ERROR/ActivityThread(2502):     at com.huskybus.Main.onCreate(Main.java:91)
08-12 15:07:35.630: ERROR/ActivityThread(2502):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
08-12 15:07:35.630: ERROR/ActivityThread(2502):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1722)
08-12 15:07:35.630: ERROR/ActivityThread(2502):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1784)
08-12 15:07:35.630: ERROR/ActivityThread(2502):     at android.app.ActivityThread.access$1500(ActivityThread.java:123)
08-12 15:07:35.630: ERROR/ActivityThread(2502):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:939)
08-12 15:07:35.630: ERROR/ActivityThread(2502):     at android.os.Handler.dispatchMessage(Handler.java:99)
08-12 15:07:35.630: ERROR/ActivityThread(2502):     at android.os.Looper.loop(Looper.java:130)
08-12 15:07:35.630: ERROR/ActivityThread(2502):     at android.app.ActivityThread.main(ActivityThread.java:3835)
08-12 15:07:35.630: ERROR/ActivityThread(2502):     at java.lang.reflect.Method.invokeNative(Native Method)
08-12 15:07:35.630: ERROR/ActivityThread(2502):     at java.lang.reflect.Method.invoke(Method.java:507)
08-12 15:07:35.630: ERROR/ActivityThread(2502):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:847)
08-12 15:07:35.630: ERROR/ActivityThread(2502):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:605)
08-12 15:07:35.630: ERROR/ActivityThread(2502):     at dalvik.system.NativeStart.main(Native Method)
08-12 15:07:35.630: ERROR/ActivityThread(2502): Caused by: java.lang.reflect.InvocationTargetException
08-12 15:07:35.630: ERROR/ActivityThread(2502):     at java.lang.reflect.Constructor.constructNative(Native Method)
08-12 15:07:35.630: ERROR/ActivityThread(2502):     at java.lang.reflect.Constructor.newInstance(Constructor.java:415)
08-12 15:07:35.630: ERROR/ActivityThread(2502):     at android.view.LayoutInflater.createView(LayoutInflater.java:505)
08-12 15:07:35.630: ERROR/ActivityThread(2502):     ... 21 more
08-12 15:07:35.630: ERROR/ActivityThread(2502): Caused by: java.lang.NullPointerException
08-12 15:07:35.630: ERROR/ActivityThread(2502):     at com.huskybus.CampusMapOpenGL.<init>(CampusMapOpenGL.java:101)
08-12 15:07:35.630: ERROR/ActivityThread(2502):     ... 24 more
08-12 15:07:35.637: DEBUG/AndroidRuntime(2502): Shutting down VM
08-12 15:07:35.637: WARN/dalvikvm(2502): threadid=1: thread exiting with uncaught exception (group=0x40015560)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502): FATAL EXCEPTION: main
08-12 15:07:35.653: ERROR/AndroidRuntime(2502): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.huskybus/com.huskybus.Main}: android.view.InflateException: Binary XML file line #5: Error inflating class com.huskybus.CampusMapOpenGL
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1768)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1784)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at android.app.ActivityThread.access$1500(ActivityThread.java:123)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:939)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at android.os.Handler.dispatchMessage(Handler.java:99)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at android.os.Looper.loop(Looper.java:130)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at android.app.ActivityThread.main(ActivityThread.java:3835)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at java.lang.reflect.Method.invokeNative(Native Method)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at java.lang.reflect.Method.invoke(Method.java:507)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:847)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:605)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at dalvik.system.NativeStart.main(Native Method)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502): Caused by: android.view.InflateException: Binary XML file line #5: Error inflating class com.huskybus.CampusMapOpenGL
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at android.view.LayoutInflater.createView(LayoutInflater.java:518)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:570)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at android.view.LayoutInflater.rInflate(LayoutInflater.java:623)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at android.view.LayoutInflater.inflate(LayoutInflater.java:408)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:212)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at android.app.Activity.setContentView(Activity.java:1657)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at com.huskybus.Main.onCreate(Main.java:91)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1722)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     ... 11 more
08-12 15:07:35.653: ERROR/AndroidRuntime(2502): Caused by: java.lang.reflect.InvocationTargetException
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at java.lang.reflect.Constructor.constructNative(Native Method)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at java.lang.reflect.Constructor.newInstance(Constructor.java:415)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at android.view.LayoutInflater.createView(LayoutInflater.java:505)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     ... 21 more
08-12 15:07:35.653: ERROR/AndroidRuntime(2502): Caused by: java.lang.NullPointerException
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     at com.huskybus.CampusMapOpenGL.<init>(CampusMapOpenGL.java:101)
08-12 15:07:35.653: ERROR/AndroidRuntime(2502):     ... 24 more

Answer 1

尝试 loading.findViewById(...) 而不是 findViewById(...)