当我收到以下错误时，如何在我的特定网格视图中更改图像。我在其他地方也遵循了类似的例子，但没有成功。即在尝试以下操作时，我得到“无法从整数更改为图像视图”，从（参见Android GridView - update View based on position），即：
int tempid = v.getId();
ImageView imgView = FruitToChooseFromImages.get(tempid);
imgView.setBackgroundResource(R.drawable.blank);
我也试过：
{ // remove viewable image / make blank
ImageView imageView = (ImageView) v;
imageView.setImageResource(R.drawable.blank);
}
如果您需要，下面的完整代码：
主要JAVA代码：
public class game1mainscreen extends Activity {
private MyGridviewAdapter1 mAdapter;
private GridView gridview;
private ArrayList<Integer> FruitToChooseFromImages;
private ArrayList<Integer> tempintarray;
int Totalfruit = 11; // starting from 0 of course (so an 11=12 fruit) this means there are 6 pairs of fruit to select
int fruitleft = 12;
int fruitstilltoadd = Totalfruit + 1;
int numberOfFruitToRemove = 6;
int puthere = 0;
int imagesSelectedThusFar = 0;
int Fruitleft = 0;
int firstfruitselected = R.drawable.blank; int firstfruitselpos;
int secondfruitselected = R.drawable.blank; int secondfruitselpos;
int removefirstimage = 0;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.gameonemenu);
{
FruitToChooseFromImages = new ArrayList<Integer>();
FruitToChooseFromImages.add(R.drawable.fruit0);
.....etc....
FruitToChooseFromImages.add(R.drawable.fruit11);
}
...code removed which randomly sorts FruitToChooseFromImages (ie arraylist of images) into 6 duplicate pairs of images...
// prepared arraylist is passed to the Adapter class
mAdapter = new MyGridviewAdapter1(this, FruitToChooseFromImages);
// Set custom adapter to gridview
gridview = (GridView) findViewById(R.id.gridView1);
gridview.setAdapter(mAdapter);
// DO THIS WHEN CLICKED
gridview.setOnItemClickListener(new OnItemClickListener()
{
public void onItemClick(AdapterView<?> parent, View v, int position, long id)
{
int fruitselected = (int)FruitToChooseFromImages.get(position);
// start
if (fruitselected == R.drawable.blank)
{
// if blank/empty icon clicked on then DO NOTHING
}
else
{ // firstly, say fruit name
int soundtoplaynow = getrightsound(position, fruitselected);
SoundManager.playSound(soundtoplaynow, 1);
// next
if (imagesSelectedThusFar == 0)
{
imagesSelectedThusFar = 1;
firstfruitselected = fruitselected; firstfruitselpos = position;
//both switch fruit image to blank in the array and display blank at position clicked
FruitToChooseFromImages.set(position, R.drawable.blank);
{ // remove viewable image / make blank
ImageView imageView = (ImageView) v;
imageView.setImageResource(R.drawable.blank);
}
}
else // so two images have been selected! do they match?
{
imagesSelectedThusFar = 0; // has reached 2, so reset to zero
secondfruitselected = fruitselected; secondfruitselpos = position;
if (firstfruitselected == secondfruitselected)
{
GeneralSoundManager.playSound(0, 1);// play happy sound - change code to GeneralSoundManager
//switch fruit image to blank and display blank at position clicked **
FruitToChooseFromImages.set (position, R.drawable.blank);
{ // remove viewable image / make blank
ImageView imageView = (ImageView) v;
imageView.setImageResource(R.drawable.blank);
}
int tempid = v.getId();
ImageView imgView = FruitToChooseFromImages.get(tempid);
imgView.setBackgroundResource(R.drawable.blank);
fruitleft = (fruitleft - 2);
}
else
{ // you selected the wrong fruit, sorry.
GeneralSoundManager.playSound(1, 1);
FruitToChooseFromImages.set (firstfruitselpos, firstfruitselected);
//
}
}
}
// end
if (fruitleft == 0)
{
//end game - add code here
}
}
});
}
// returns the sound to play depending on what image was clicked on
public int getrightsound(Integer position, Integer switchused) {
...etc....
return soundtoplay;
}
}
我的gridview适配器代码：
public class MyGridviewAdapter1 extends BaseAdapter
{
private ArrayList<Integer> FruitToChooseFromImages;
private Activity activity;
public MyGridviewAdapter1(Activity activity,ArrayList<Integer> FruitToChooseFromImages)
{
super();
this.FruitToChooseFromImages = FruitToChooseFromImages;
this.activity = activity;
}
public int getCount() {
return FruitToChooseFromImages.size();
}
public Integer getItem(int position) {
return FruitToChooseFromImages.get(position);
}
public long getItemId(int position) {
return 0;
}
public static class ViewHolder
{
public ImageView imgViewFlag;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder view;
LayoutInflater inflator = activity.getLayoutInflater();
if(convertView==null)
{
view = new ViewHolder();
convertView = inflator.inflate(R.layout.gridview_row, null);
view.imgViewFlag = (ImageView) convertView.findViewById(R.id.imageView1);
convertView.setTag(view);
}
else
{
view = (ViewHolder) convertView.getTag();
}
view.imgViewFlag.setImageResource(FruitToChooseFromImages.get(position));
return convertView;
}
}
我的主要 xml 代码 - gameonemenu：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="fill_parent"
android:layout_width="fill_parent"
android:gravity="center"
android:layout_gravity="center"
android:background="@drawable/tree">
<GridView
android:id="@+id/gridView1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:numColumns="4"
android:verticalSpacing="1dp"
android:horizontalSpacing="1dp"
android:stretchMode="columnWidth"
android:gravity="center" />
</LinearLayout>
我的 Gridview_row xml 代码：
<ImageView
android:layout_height="64dp"
android:id="@+id/imageView1"
android:layout_width="64dp"
android:src="@drawable/blank"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true">
</ImageView>
</RelativeLayout>
PS 我使用了最初显示文本的 Grirdview_row xml，但我不需要仅显示文本图像，但这会导致问题吗？PSS 请将您的建议保持在 COMPLETE 初学者级别，并尽可能包含代码以匹配解释。我不能强调这一点。谢谢。