如何在gridView中将imageView投影到imageView上？

Question

我跟着android:gridview的教程，我正在制作一个应用程序，我想在gridview的每个网格内的图像上添加文本。我已经在那里我已经把文本在imageview的

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

<ImageView 
    android:id="@+id/imageView1" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignParentTop="true" 
    android:layout_centerHorizontal="true" 
    android:layout_marginTop="17dp" 
    android:src="@drawable/n" /> 

<TextView 
    android:id="@+id/textView1" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignBottom="@+id/imageView1" 
    android:layout_alignLeft="@+id/imageView1" 
    android:layout_marginBottom="19dp" 
    android:layout_marginLeft="30dp" 
    android:text="Medium Text" 
    android:textAppearance="?android:attr/textAppearanceMedium" 
    android:textColor="#ffffff" 
    android:textStyle="bold" /> 

</RelativeLayout> 

和类代码延伸BaseAdapter类的XML文件

public class TourismImageAdapter extends BaseAdapter { 



private Integer[] mThumbIds = { 
     R.drawable.a, 
     R.drawable.b, 
     R.drawable.c, 
     R.drawable.d, 
     R.drawable.e, 
     }; 




private Context mContext; 
public TourismImageAdapter(Context c){ 
    mContext = c; 
} 

@Override 
public int getCount() { 
    // TODO Auto-generated method stub 
    return mThumbIds.length; 
} 

@Override 
public Object getItem(int position) { 
    // TODO Auto-generated method stub 
    return null; 
} 

@Override 
public long getItemId(int position) { 
    // TODO Auto-generated method stub 
    return 0; 
} 

@Override 
public View getView(int position, View convertView, ViewGroup parent) { 
    // TODO Auto-generated method stub 
    ImageView imageView; 

    if (convertView == null) { // if it's not recycled, initialize some attributes 
     imageView = new ImageView(mContext); 
     imageView.setLayoutParams(new GridView.LayoutParams(340, 300)); 
     imageView.setScaleType(ImageView.ScaleType.CENTER_INSIDE); 
     imageView.setPadding(2, 2, 2, 2); 
    } else { 
     imageView = (ImageView) convertView; 

    } 

    imageView.setImageResource(mThumbIds[position]); 
    return imageView; 
} 

} 

我应该如何连接XML和Java文件，以便我在GridView的每个网格上实现了图像上的文本。在此先感谢

Answer 1

public class TourismImageAdapter extends BaseAdapter { 
private Integer[] mThumbIds = { R.drawable.a, R.drawable.b, R.drawable.c, R.drawable.d, R.drawable.e, }; 
private LayoutInflater mInflater; 
private ViewHolder mViewHolder; 

class ViewHolder { 
    public TextView textView; 
    public ImageView imageView; 
} 

public TourismImageAdapter(Context c) { 
    mInflater = (LayoutInflater) c.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
} 

@Override 
public int getCount() { 
    return mThumbIds.length; 
} 

@Override 
public Object getItem(int position) { 
    return mThumbIds[position]; 
} 

@Override 
public long getItemId(int position) { 
    return position; 
} 

@Override 
public View getView(int position, View convertView, ViewGroup parent) { 
    if (convertView == null) { 
     mViewHolder = new ViewHolder(); 
     convertView = mInflater.inflate(R.layout.your_xml, parent, false); 
     mViewHolder.textView = (TextView) convertView.findViewById(R.id.textView1); 
     mViewHolder.imageView = (ImageView) convertView.findViewById(R.id.imageView1); 
     convertView.setTag(mViewHolder); 
    } else { 
     mViewHolder = (ViewHolder) convertView.getTag(); 
    } 

    mViewHolder.imageView.setImageResource(mThumbIds[position]); 
    mViewHolder.textView.setText("text"); 

    return convertView; 
} 

} 

Answer 2

 public class TourismImageAdapter extends BaseAdapter 
     { 
      private Integer[] mThumbIds = 
      { 
      R.drawable.a, 
      R.drawable.b, 
      R.drawable.c, 
      R.drawable.d, 
      R.drawable.e, 
     }; 

     private Context mContext; 
     public TourismImageAdapter(Context c) 
     { 
     mContext = c; 
     } 

     @Override 
     public int getCount() 
     { 
     return mThumbIds.length; 
     } 

     @Override 
     public Object getItem(int position) 
     { 
     return mThumbIds[position]; 
     } 

     @Override 
     public long getItemId(int position) 
     { 
      return position; 
     } 

@Override 
public View getView(int position, View convertView, ViewGroup parent) { 
    // TODO Auto-generated method stub 
    ImageView imageView; 

    if (convertView == null) { // if it's not recycled, initialize some attributes 
     imageView = new ImageView(mContext); 
     imageView.setLayoutParams(new GridView.LayoutParams(340, 300)); 
     imageView.setScaleType(ImageView.ScaleType.CENTER_INSIDE); 
     imageView.setPadding(2, 2, 2, 2); 
    } else { 
     imageView = (ImageView) convertView; 

    } 

    imageView.setImageResource(mThumbIds[position]); 
    return imageView; 
} 

} 

Answer 3

你的XML应该是这样的

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:gravity="center" 
android:padding="10dp" 
android:orientation="vertical" > 

<TextView 
    android:id="@+id/textView1" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="Medium Text" 
    android:textAppearance="?android:attr/textAppearanceMedium" 
    android:textColor="@android:color/black" 
    android:textStyle="bold" /> 

<ImageView 
    android:id="@+id/imageView1" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_marginTop="17dp" 
    android:src="@drawable/ic_launcher" /> 

</LinearLayout> 

而这样一来，你可以与你的适配器class.Below链接你的XML是getView（）适配器的代码

@Override 
public View getView(int position, View convertView, ViewGroup arg2) { 
ViewHolder holder; 
    if (convertView == null) { 
     holder = new ViewHolder(); 
     convertView = layoutInflater.inflate(R.layout.partnerslistcontents, 
       null); 
     holder.textView= (TextView) convertView.findViewById(R.id.textView1); 
     holder.imageView = (ImageView) convertView.findViewById(R.id.imageView1); 
     convertView.setTag(holder); 
    } else { 
     holder = (ViewHolder) convertView.getTag(); 
    } 


    holder.textView.setText("");// set your text here 
    holder.imageView.setImageResource(mThumbIds[position]);//set your image here 

    return convertView; 
} 

，这里是你的ViewHolder类

static class ViewHolder { 
    ImageView imageView; 
    TextView textView; 
} 

还添加此

private Context mContext; 
private LayoutInflater layoutInflater; 
public TourismImageAdapter(Context c){ 
mContext = c; 
layoutInflater = LayoutInflater.from(mContext); 
}