如何从gridview设置onClick图像？

Question

我能够显示在gridview中点击的项目的ID，但是我想实现的是，当我点击Gridview中的任何图像时，它就会以图像的形式出现，当我点击任何使用下面的代码，它只是显示了ID，但是当我尝试显示图像本身的应用程序崩溃与LinearLayout中出现不能被强制转换为ImageView的

gifts_layout_2.xml图像的

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:app="http://schemas.android.com/apk/res-auto" 
android:id="@+id/fragment_history_menu_bottom" 
android:layout_width="match_parent" 
android:layout_height="wrap_content" 
android:background="#ffffff" 
android:gravity="center" 
android:orientation="vertical" 
app:layout_behavior="android.support.design.widget.BottomSheetBehavior"> 


<ImageView 
    android:id="@+id/close" 
    android:layout_width="15dp" 
    android:layout_height="15dp" 
    android:layout_gravity="right" 
    android:layout_marginRight="15dp" 
    android:layout_marginTop="15dp" 
    android:src="@drawable/close" /> 


<TextView 
    android:id="@+id/title" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_marginTop="5dp" 
    android:text="Smiles" 
    android:textColor="#000000" 
    android:textSize="17sp" 
    android:textStyle="bold" 
    android:layout_gravity="left" 
    android:layout_marginLeft="15dp"/> 


<GridView 
    android:layout_width="match_parent" 
    android:layout_height="150dp" 
    android:layout_marginTop="10dp" 
    android:numColumns="4" 
    android:horizontalSpacing="10dp" 
    android:verticalSpacing="10dp" 
    android:gravity="center|center_horizontal|center_vertical" 
    android:columnWidth="100dp" 
    android:stretchMode="columnWidth" 
    android:scrollbars="vertical" 
    android:scrollbarSize="3dp" 
    android:scrollIndicators="left" 
    android:id="@+id/grid_view2" 
    android:paddingLeft="10dp" 
    android:layout_marginBottom="10dp" 
    android:layout_gravity="center|center_horizontal|center_vertical" 
    android:clipChildren="false" 
    android:clipToPadding="false"/> 


</LinearLayout> 

smiles_items_layout.xml

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

<ImageView android:id="@+id/smile_image_view" 
    android:layout_width="45dp" 
    android:layout_height="45dp" 
    android:layout_gravity="center"/> 


</LinearLayout> 

下面的代码

BottomSheetDialog_Smiles.java

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

final Holder holder = new Holder(); 
LayoutInflater inflater = (LayoutInflater) 
getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
grid = inflater.inflate(R.layout.smile_items_layout, null); 
lottieImage = inflater.inflate(R.layout.activity_streaming2, null); 

holder.img = (ImageView) grid.findViewById(R.id.smile_image_view); 
holder.img.setImageResource(mThumbIds[position]); 

gridView2.setOnItemClickListener(new AdapterView.OnItemClickListener() { 

@Override 
public void onItemClick(AdapterView<?> adapterView, View view, int i, long 
l) { 
JSONDictionary imageChat = new JSONDictionary(); 
int imageId = (int) getItem(i); 
imageChat.put("message",imageId); 
Communicator.getInstance().emit("new chat message", imageChat); 
} 
}); 

return grid; 
} 

Answer 1

尝试，OnItemClick Retrun视图，你必须点击

gridView2.setOnItemClickListener(new AdapterView.OnItemClickListener() { 

@Override 
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l){ 
    ImageView imageView = (ImageView)view; 
    //if you want to get image from imageview 
    imageView .getDrawable() 
    } 
}); 

，如果你想从绘制使用得到的InputStream如下：

BitmapDrawable bitmapDrawable = ((BitmapDrawable) drawable); 
Bitmap bitmap = bitmapDrawable .getBitmap(); 
ByteArrayOutputStream stream = new ByteArrayOutputStream(); 
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream); 
byte[] imageInByte = stream.toByteArray(); 
ByteArrayInputStream bis = new ByteArrayInputStream(imageInByte); 

已更新

通过2种方式实现

1路： 从XML删除LinerLayout并ImageView的母公司为LinerLayout只包含一种观点与此类似，如果你使用这个再没有必要改变Java代码

smiles_items_layout.xml

<?xml version="1.0" encoding="utf-8"?> 
<ImageView 
     xmlns:android="http://schemas.android.com/apk/res/android" 
     android:id="@+id/smile_image_view" 
     android:layout_width="45dp" 
     android:layout_height="45dp" 
/> 

第二路

，如果你想保持你的XML作为它然后更改像贝尔Java代码ow

LinearLayout linearLayout= (LinearLayout)view; 
ImageView imageView = (ImageView) linearLayout.getChildAt(0); 
//if you want to get image from imageview 
imageView .getDrawable()