我的 imageview 在我的 android 应用程序中使用 gridview。所以在 gridview 中按下图像时,背景颜色想要改变。如果我返回,它将变成正常的背景颜色。怎么做?谁能帮我解决这个问题?
这是我的代码
public class CustomGridViewExample extends Activity {
private Integer[] mThumbIds = {
R.drawable.android_2,
R.drawable.android_2,
R.drawable.android_2,
R.drawable.android_2,
R.drawable.android_2,
R.drawable.android_2,
R.drawable.android_2,
R.drawable.android_2,
R.drawable.android_2,
R.drawable.android_2,
};
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
GridView gridview = (GridView) findViewById(R.id.gridview);
gridview.setAdapter(new MyAdapter(this));
gridview.setNumColumns(4);
}
public class MyAdapter extends BaseAdapter {
private Context mContext;
public MyAdapter(Context c) {
mContext = c;
}
@Override
public int getCount() {
return mThumbIds.length;
}
@Override
public Object getItem(int arg0) {
return mThumbIds[arg0];
}
@Override
public long getItemId(int arg0) {
return arg0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View grid;
if(convertView==null){
grid = new View(mContext);
LayoutInflater inflater=getLayoutInflater();
grid=inflater.inflate(R.layout.mygrid_layout, parent, false);
}else{
grid = (View)convertView;
}
ImageView imageView = (ImageView)grid.findViewById(R.id.image);
imageView.setImageResource(mThumbIds[position]);
return grid;
}
}
相关的 XML 文件如下:
<GridView
android:id="@+id/gridview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:numColumns="auto_fit"
android:verticalSpacing="10dp"
android:horizontalSpacing="10dp"
android:stretchMode="columnWidth"
android:gravity="center"
android:scrollbars="none" />
mygrid_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@drawable/customshape_header"
android:orientation="vertical">
<ImageView
android:id="@+id/image"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
</RelativeLayout>
最佳答案
在您的 Drawable 文件夹中创建 grid_selector.xml。 然后编辑以下内容::`
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@color/green" android:state_pressed="true"/>
<item android:drawable="@color/blue" android:state_selected="true"/>
<item android:drawable="@color/white"/>
</selector>`
然后在你的 mygrid_layout.xml 文件中将此文件设置为相对布局中的背景..
关于Android GridView Selected Item 按下时背景颜色变化,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/12279300/