如何从gridview设置onClick图像?
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的如何从gridview设置onClick图像?
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;
}
回答:
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()
以上是 如何从gridview设置onClick图像? 的全部内容, 来源链接: utcz.com/qa/266568.html