GridView控件不显示在Android的内容 [英] GridView doesn't display content in android
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问题描述
我试图使用GridView控件来显示图像。这是我使用的GridView的第一次，所以我用从这里和实施的例子它煤矿（我曾经尝试包含有这个例子，它的作品）。
i am trying to display image using GridView. This is the first time i using GridView, so i using the example from here and implement it to mine (i have tried the example that contained there, and it's works).
不过，我已经检查了很多时间，也没有错误来自LogCat中，没有强制关闭，图像没有显示。我不知道哪来的错误部分。
But, i have checked it many time, there's no error comes from LogCat, no Force Closed, the image didn't show. i have no idea where's the wrong part.
下面是我的code：
choosepic.xml
choosepic.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="fill_parent"
android:orientation="vertical"
android:background="@drawable/bg_inner">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/book_inner"
android:layout_marginTop="50dp"
/>
<ImageButton
android:id="@+id/homeBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/home_btn"
android:background="@null"
/>
<ImageView
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:src="@drawable/bg_arrow_btn"
android:layout_alignParentRight="true"
/>
<ImageButton
android:id="@+id/nextBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/right_arrow"
android:background="@null"
android:layout_alignParentRight="true"
android:layout_marginTop="5dp"
android:layout_marginRight="7dp"
android:layout_marginLeft="7dp"
/>
<ImageButton
android:id="@+id/prevBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/left_arrow"
android:background="@null"
android:layout_toLeftOf="@+id/nextBtn"
android:layout_marginTop="5dp"
/>
<GridView
android:id="@+id/gridView1"
android:numColumns="3"
android:gravity="center"
android:columnWidth="30dp"
android:stretchMode="columnWidth"
android:layout_width="300dp"
android:layout_height="200dp"
android:layout_marginLeft="60dp"
android:layout_marginTop="70dp"
>
</GridView>
</RelativeLayout>
animalbutton.xml
animalbutton.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="fill_parent"
android:orientation="vertical" >
<ImageView
android:id="@+id/grid_item_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_launcher"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true">
</ImageView>
<TextView
android:text="TextView"
android:layout_height="wrap_content"
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_centerHorizontal="true"
android:textSize="18sp"
android:visibility="gone">
</TextView>
ImageAdapter.java
ImageAdapter.java
public class ImageAdapter extends BaseAdapter{
private Activity activity;
private ArrayList<String> listNm;
private ArrayList<Integer> listAnim;
public ImageAdapter(Activity activity,ArrayList<String> listName, ArrayList<Integer> listImage) {
super();
this.listNm = listName;
this.listAnim = listImage;
this.activity = activity;
}
public static class ViewHolder
{
public ImageView imgViewAnim;
public TextView txtViewAnim;
}
@Override
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.animalbutton, null);
view.txtViewAnim = (TextView) convertView.findViewById(R.id.textView1);
view.imgViewAnim = (ImageView) convertView.findViewById(R.id.grid_item_image);
convertView.setTag(view);
}
else
{
view = (ViewHolder) convertView.getTag();
}
view.txtViewAnim.setText(listNm.get(position));
view.imgViewAnim.setImageResource(listAnim.get(position));
return convertView;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return 0;
}
@Override
public String getItem(int position) {
// TODO Auto-generated method stub
return listNm.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
}
choosepic.java
choosepic.java
public class choosepic extends Activity {
/** Called when the activity is first created. */
ImageAdapter mAdapter;
GridView gridView;
static final String[] animal = new String[] {
"cat", "cow","croc", "duck", "elephant", "giraffe", "lion", "moose", "mouse"};
private ArrayList<String> listNm;
private ArrayList<Integer> listAnim;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.choosepic);
gridView = (GridView) findViewById(R.id.gridView1);
prepare_list1();
mAdapter = new ImageAdapter(this,listNm, listAnim);
gridView.setAdapter(mAdapter);
gridView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View v, int position, long id) {
Toast.makeText(getApplicationContext(), mAdapter.getItem(position), Toast.LENGTH_SHORT).show();
}
});
}
public void prepare_list1(){
listNm = new ArrayList<String>();
listAnim = new ArrayList<Integer>();
for (int i = 0; i < animal.length; i++) {
listNm.add(animal[i]);
listAnim.add(getResources().getIdentifier("anim_"+animal[i], "drawable", getPackageName()));
}
}
}
我需要一些帮助。我AP preciate任何帮助。预先感谢您！
i need some help. i appreciate any help. thank you in advance!
推荐答案
我认为这个问题是在你的 getCount将（），返回0元
而不是使它像这样
i think the problem is in your getCount() that returns 0 elements
instead of that make it like this
@Override
public int getCount() {
// TODO Auto-generated method stub
return listNm.size();
}
这篇关于GridView控件不显示在Android的内容的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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