Question

我的应用中有一种奇怪的行为。我正在使用一个gridview和一个imageadapter类。现在，如果我将手机方向从纵向更改为横向，则会崩溃。但如果我从肖像中改变景观，那么它的效果非常好。我有两个独立的纵向和横向布局，存储在res / layout和res / layout-land

中

这是我的活动课

    @Override
protected void onCreate(Bundle savedBundle) {
    // TODO Auto-generated method stub
    super.onCreate(savedBundle);
    setContentView(R.layout.rashi_grid);
    RashiImageAdapter adapter = new RashiImageAdapter(RashiFragmentActivity.this);
    int count = adapter.getCount();
    System.out.println("Total Count From RashiFragmentactivity:-"+count);

    StaggeredGridView gridView = (StaggeredGridView) findViewById(R.id.gridview);
    gridView.setAdapter(adapter);
    //GridView gridView = (GridView) rootView.findViewById(R.id.gridview);
    gridView.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(StaggeredGridView parent, View view, int position,
                long id) {
            // TODO Auto-generated method stub
            Intent product = new Intent(RashiFragmentActivity.this,productActivity.class);
            product.putExtra("productname", position);
            startActivity(product);
            finish();
        }
    });
}

这是我的imageadapter类

 private Context mycontext;
 private LayoutInflater mInflater;

 public Integer ImageId[]={
    R.drawable.a,R.drawable.b,R.drawable.c,R.drawable.d,
    R.drawable.e,R.drawable.f
};

public String productName[]={
        "a","b","c",
        "d","e","f"
};

public String productprice[]={
    "2450"  ,"3990", "2490","2490","5100","1350"
};

public RashiImageAdapter(Context context)
{
    mycontext = context;
     mInflater = LayoutInflater.from(context);
}

@Override
public int getCount() {
    // TODO Auto-generated method stub
    return ImageId.length;
}

@Override
public Object getItem(int arg0) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public long getItemId(int arg0) {
    // TODO Auto-generated method stub
    return 0;
}

@Override
public View getView(int position, View v, ViewGroup parent) {


    ViewHolder vh;

    if (v == null)
    {
    vh = new ViewHolder();
    v = mInflater.inflate(R.layout.row_grid,parent,false);
    vh.productname = (TextView)v.findViewById(R.id.productname);
    vh.productprice = (TextView)v.findViewById(R.id.product_price);
    vh.productpricedetails = (TextView)v.findViewById(R.id.product_pricedetails);
    vh.imageView = (ImageView)v.findViewById(R.id.grid_item_image);

    v.setTag(vh); 
    }
    else 
    { 
    vh = (ViewHolder) v.getTag();  
    }       

    vh.productpricedetails.setText(productprice[position]);
    vh.productname.setText(productName[position]);
    vh.imageView.setImageResource(ImageId[position]);
    vh.imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);

    return v;
}

这是我的用于肖像的gridview xml文件

      <com.origamilabs.library.views.StaggeredGridView
  xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:staggered="http://schemas.android.com/apk/res-auto"
    android:id="@+id/gridview"
   staggered:numColumns="1"
    android:layout_width="fill_parent"
     android:layout_height="fill_parent"
    staggered:drawSelectorOnTop="false"
   android:layout_marginRight="0.5dp"
    android:layout_marginLeft="0.5dp"
     android:layout_gravity="top"
     android:stretchMode="columnWidth"         
     />

和横向

       <com.origamilabs.library.views.StaggeredGridView
  xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:staggered="http://schemas.android.com/apk/res-auto"
    android:id="@+id/gridview"
   staggered:numColumns="2"
    android:layout_width="fill_parent"
     android:layout_height="fill_parent"
    staggered:drawSelectorOnTop="false"
   android:layout_marginRight="0.5dp"
    android:layout_marginLeft="0.5dp"
     android:layout_gravity="top"
     android:stretchMode="columnWidth"         
     />

我在哪里做错了？

Logcat错误

          12-02 11:37:14.993: E/AndroidRuntime(7880): FATAL EXCEPTION: main
         12-02 11:37:14.993: E/AndroidRuntime(7880): java.lang.ArrayIndexOutOfBoundsException: length=1; index=1
        12-02 11:37:14.993: E/AndroidRuntime(7880):     at com.origamilabs.library.views.StaggeredGridView.populate(StaggeredGridView.java:966)
          12-02 11:37:14.993: E/AndroidRuntime(7880):   at com.origamilabs.library.views.StaggeredGridView.onLayout(StaggeredGridView.java:920)
       12-02 11:37:14.993: E/AndroidRuntime(7880):  at android.view.View.layout(View.java:14072)
       12-02 11:37:14.993: E/AndroidRuntime(7880):  at android.view.ViewGroup.layout(ViewGroup.java:4607)
     12-02 11:37:14.993: E/AndroidRuntime(7880):    at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
    12-02 11:37:14.993: E/AndroidRuntime(7880):     at android.view.View.layout(View.java:14072)
     12-02 11:37:14.993: E/AndroidRuntime(7880):    at android.view.ViewGroup.layout(ViewGroup.java:4607)
    12-02 11:37:14.993: E/AndroidRuntime(7880):     at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1655)
    12-02 11:37:14.993: E/AndroidRuntime(7880):     at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1513)
  12-02 11:37:14.993: E/AndroidRuntime(7880):   at android.widget.LinearLayout.onLayout(LinearLayout.java:1426)
  12-02 11:37:14.993: E/AndroidRuntime(7880):   at android.view.View.layout(View.java:14072)
   12-02 11:37:14.993: E/AndroidRuntime(7880):  at android.view.ViewGroup.layout(ViewGroup.java:4607)
   12-02 11:37:14.993: E/AndroidRuntime(7880):  at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
    12-02 11:37:14.993: E/AndroidRuntime(7880):     at android.view.View.layout(View.java:14072)
   12-02 11:37:14.993: E/AndroidRuntime(7880):  at android.view.ViewGroup.layout(ViewGroup.java:4607)
 12-02 11:37:14.993: E/AndroidRuntime(7880):    at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:1997)
   12-02 11:37:14.993: E/AndroidRuntime(7880):  at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1818)
  12-02 11:37:14.993: E/AndroidRuntime(7880):   at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1115)
  12-02 11:37:14.993: E/AndroidRuntime(7880):   at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4526)
  12-02 11:37:14.993: E/AndroidRuntime(7880):   at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
 12-02 11:37:14.993: E/AndroidRuntime(7880):    at android.view.Choreographer.doCallbacks(Choreographer.java:555)
 12-02 11:37:14.993: E/AndroidRuntime(7880):    at android.view.Choreographer.doFrame(Choreographer.java:525)
12-02 11:37:14.993: E/AndroidRuntime(7880):     at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
12-02 11:37:14.993: E/AndroidRuntime(7880):     at android.os.Handler.handleCallback(Handler.java:615)
 12-02 11:37:14.993: E/AndroidRuntime(7880):    at android.os.Handler.dispatchMessage(Handler.java:92)
 12-02 11:37:14.993: E/AndroidRuntime(7880):    at android.os.Looper.loop(Looper.java:137)
  12-02 11:37:14.993: E/AndroidRuntime(7880):   at android.app.ActivityThread.main(ActivityThread.java:4921)
  12-02 11:37:14.993: E/AndroidRuntime(7880):   at java.lang.reflect.Method.invokeNative(Native Method)
  12-02 11:37:14.993: E/AndroidRuntime(7880):   at java.lang.reflect.Method.invoke(Method.java:511)
 12-02 11:37:14.993: E/AndroidRuntime(7880):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1027)
 12-02 11:37:14.993: E/AndroidRuntime(7880):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794)
 12-02 11:37:14.993: E/AndroidRuntime(7880):    at dalvik.system.NativeStart.main(Native Method)

还有一件事是..如果我在layout-land / grid.xml文件中将列大小2更改为1，则错误不会到来。它工作正常。为什么ithis有奇怪的行为？如何完成我的代码以将肖像更改为横向，并且布局应根据横向到纵向发生的情况进行更改。如果风景画像工作得很好那么为什么画像不能用于风景呢？

Answer 1

我找到了解决方案。这是StaggeredGridView库的一个错误。

如果有人遇到同样的问题，我会发布解决方案。

您需要将以下代码更改为StaggeredGridView.java类

        final int top = getPaddingTop();
    for(int i = 0; i<colCount; i++){
        final int offset =  top + ((mRestoreOffsets != null)? Math.min(mRestoreOffsets[i], 0) : 0);
        mItemTops[i] = (offset == 0) ? mItemTops[i] : offset;
        mItemBottoms[i] = (offset == 0) ? mItemBottoms[i] : offset;

到此代码

              final int top = getPaddingTop();
    for(int i = 0; i<colCount; i++){
    // final int offset =  top + ((mRestoreOffsets != null)? Math.min(mRestoreOffsets[i], 0) : 0);
        int offset = top;
        if((mRestoreOffsets != null) && mRestoreOffsets.length == colCount)
          offset +=  Math.min(mRestoreOffsets[i], 0);
       mItemTops[i] = (offset == 0) ? mItemTops[i] : offset;
       mItemBottoms[i] = (offset == 0) ? mItemBottoms[i] : offset;

Answer 2

当你改变方向时，会调用覆盖方法：

@Override
    protected void onSaveInstanceState(Bundle outState) {
        // TODO Auto-generated method stub
        super.onSaveInstanceState(outState);
    }

    @Override
    protected void onRestoreInstanceState(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onRestoreInstanceState(savedInstanceState);
    }

当您更改方向时，视图会重新加载，您必须在onSaveInstanceState方法中保留您的值并恢复或应用值才能在onRestoreInstanceState中查看...

当方向从纵向更改为横向时，程序崩溃

2 个答案: