使用addView()时我的应用程序崩溃

Question

我是机器人的菜鸟.每当我使用ViewGroup addView()方法时,我的应用程序都会崩溃,但是当我使用Activity addContentView()方法时,它会起作用.

我想使用addView()而不是addContentView()的原因是我希望能够在不需要时删除布局,这是addContentView()无法实现的.

代码:MainActivity.java

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    //CAMERA VIEW
    setContentView(R.layout.activity_main);
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

    surfaceView = (SurfaceView)findViewById(R.id.surfaceview);
    surfaceHolder = surfaceView.getHolder();
    surfaceHolder.addCallback(this);
    surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

    ViewGroup rootView = (ViewGroup) findViewById(R.layout.activity_main);
    LayoutInflater mLayoutInflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);

    //GRAPHICS VIEW
    glSurfaceView = new GLSurfaceView(this);
    glSurfaceView.setEGLConfigChooser(8, 8, 8, 8, 16, 0);
    glSurfaceView.getHolder().setFormat(PixelFormat.TRANSLUCENT);
    glSurfaceView.setRenderer(new GLRenderer());
    //crash
    //rootView.addView(glSurfaceView, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
    //not crash
    addContentView(glSurfaceView, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
    glSurfaceView.setZOrderMediaOverlay(true);

    //CONTROLS VIEW
    View ctrlLayout = mLayoutInflater.inflate(R.layout.activity_controls, rootView);
        //crash
        //rootView.addView(ctrlLayout, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
        //not crash
    addContentView(ctrlLayout, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
    ctrlLayout.bringToFront();
    textView = (TextView)ctrlLayout.findViewById(R.id.text);
    rtTextView = (TextView)ctrlLayout.findViewById(R.id.rt_text);
    btnStart = (Button)ctrlLayout.findViewById(R.id.button1);
}

activity_main.xml中

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    tools:context=".MainActivity" >

    <SurfaceView
        android:id="@+id/surfaceview"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />

</RelativeLayout>

activity_controls.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <TextView
        android:id="@+id/text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="14dp"
        android:text="@string/hello_world" />

    <TextView
        android:id="@+id/rt_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:layout_marginRight="18dp"
        android:layout_marginTop="14dp"
        android:text="@string/str_rttext" />

    <TextView
        android:id="@+id/title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignTop="@+id/rt_text"
        android:layout_centerHorizontal="true"
        android:text="@string/str_title"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <Button
        android:id="@+id/button1"
        android:layout_width="100dp"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="@string/btn_start" />

</RelativeLayout>

编辑:

我按照FD_的建议更改了我的代码

ViewGroup rootView = mLayoutInflater.inflate(R.layout.activity_main,null); 现在,当我在onCreate函数结束时调用setContentView(rootView)时,它崩溃了.

这是logcat:

02-16 08:00:28.142: I/dalvikvm(2153): threadid=1: stack overflow on call to Landroid/view/View;.isLayoutDirectionInherited:Z
02-16 08:00:28.142: I/dalvikvm(2153):   method requires 12+20+4=36 bytes, fp is 0xb02fe320 (32 left)
02-16 08:00:28.152: I/dalvikvm(2153):   expanding stack end (0xb02fe300 to 0xb02fe000)
02-16 08:00:28.152: I/dalvikvm(2153): Shrank stack (to 0xb02fe300, curFrame is 0xb0303ec4)
02-16 08:00:28.152: D/AndroidRuntime(2153): Shutting down VM
02-16 08:00:28.152: W/dalvikvm(2153): threadid=1: thread exiting with uncaught exception (group=0xb1aeab90)
02-16 08:00:28.932: D/dalvikvm(2153): GC_FOR_ALLOC freed 117K, 6% free 3266K/3448K, paused 80ms, total 86ms
02-16 08:00:29.382: D/dalvikvm(2153): GC_FOR_ALLOC freed 356K, 11% free 3423K/3844K, paused 46ms, total 47ms
02-16 08:00:29.402: E/AndroidRuntime(2153): FATAL EXCEPTION: main
02-16 08:00:29.402: E/AndroidRuntime(2153): Process: com.example.previewcamera, PID: 2153
02-16 08:00:29.402: E/AndroidRuntime(2153): java.lang.StackOverflowError
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5713)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetResolvedLayoutDirection(ViewGroup.java:5714)
02-16 08:00:29.402: E/AndroidRuntime(2153):     at android.view.ViewGroup.resetRes
02-16 08:00:29.632: D/dalvikvm(2153): GC_FOR_ALLOC freed 548K, 16% free 3386K/4000K, paused 54ms, total 55ms

Answer 1

对于那些最终尝试使用自定义视图追踪该错误的人,请仔细检查您是否正确充气.以下更改解决了我的问题.

错误:

View view = inflate(getContext(), R.layout.foo, this);
addView(view);

工作良好:

View view = inflate(getContext(), R.layout.foo, null);
addView(view);

Answer 2

你必须调用setContentView()之前,你可以使用findViewById()你的Activity.此外,findViewById()返回包含在内容视图中并由作为参数传递的id值标识的视图,因此传递布局资源将永远不会起作用.

另一种选择是使用LayoutInflater以下方法自行膨胀视图:

LayoutInflater inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
ViewGroup rootView  = inflater.inflate(R.layout.main, null);