如何开始一个新的活动，而始终保持画廊？

Question

我正在使用库视图制作记忆游戏。我希望所有卡片都显示在底部，当用户从图库中选取一张卡片时，特定的卡片会显示在其上方（在图像视图中）。当用户触摸这张卡片时，卡片应该转动（使用翻转动画）并且卡片的正面应该被显示（这应该是新的活动）。在翻转过程中，我总是想在底部显示画廊。我怎样才能做到这一点？我有以下代码没有错误，但应用程序在开始之前崩溃。在查看日志猫时，它建议在开始新酸度时出现错误。

import android.app.Activity; 
import android.content.Context; 
import android.content.Intent; 
import android.content.res.TypedArray; 
import android.os.Bundle; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.AdapterView; 
import android.widget.AdapterView.OnItemClickListener; 
import android.widget.BaseAdapter; 
import android.widget.Gallery; 
import android.widget.ImageView; 
import android.widget.Toast; 

public class GalleryActivity extends Activity { 
    //---the images to display--- 
    Integer[] imageIDs = { 
      R.drawable.you, 
      R.drawable.date, 
      R.drawable.competition, 
      R.drawable.contacts, 
      R.drawable.memory, 
      R.drawable.mission, 
      R.drawable.recognition, 
      R.drawable.report, 
      R.drawable.stallion, 
      R.drawable.strategy, 
      R.drawable.team 

    }; 
    ImageView youview; 

    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 

     Gallery gallery = (Gallery) findViewById(R.id.gallery1); 



     gallery.setAdapter(new ImageAdapter(this)); 
     gallery.setOnItemClickListener(new OnItemClickListener() 
     { 
      public void onItemClick(AdapterView<?> parent, View v, 
      int position, long id) 
      { 
       Toast.makeText(getBaseContext(), 
         "card" + (position + 1) + " selected", 
         Toast.LENGTH_SHORT).show(); 

       //---display the images selected--- 
       ImageView imageView = (ImageView) findViewById(R.id.image1); 
       imageView.setImageResource(imageIDs[position]); 
      } 
     }); 

     youview=(ImageView)findViewById(R.drawable.you); 
     youview.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       // TODO Auto-generated method stub 
       Intent intent = new Intent(GalleryActivity.this, You.class); 
       startActivity(intent); 
       } 
     }); 
    } 

    public class ImageAdapter extends BaseAdapter 
    { 
     Context context; 
     int itemBackground; 

     public ImageAdapter(Context c) 
     { 
      context = c; 
      //---setting the style--- 
      TypedArray a = obtainStyledAttributes(R.styleable.Gallery1);    

      itemBackground = a.getResourceId(
       R.styleable.Gallery1_android_galleryItemBackground, 0);     

      a.recycle(); 
     } 

     //---returns the number of images--- 
     public int getCount() { 
      return imageIDs.length; 
     } 


     //---returns the item--- 
     public Object getItem(int position) { 
      return position; 
     } 

     //---returns the ID of an item--- 
     public long getItemId(int position) { 
      return position; 
     }  

     //---returns an ImageView view--- 
     public View getView(int position, View convertView, ViewGroup parent) { 
      ImageView imageView; 
      if (convertView == null) { 
       imageView = new ImageView(context); 
       imageView.setImageResource(imageIDs[position]); 
       imageView.setScaleType(ImageView.ScaleType.FIT_XY); 
       imageView.setLayoutParams(new Gallery.LayoutParams(150, 120));     
      } else { 
       imageView = (ImageView) convertView; 
      }    
      imageView.setBackgroundResource(itemBackground); 
      return imageView; 
     } 
    } 



} 

这里是我使用的布局： -

<?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="#006600"> 

<TextView 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="Choose the card" 
    android:textSize="20dp" 
    android:textStyle="bold"/>  

<Gallery 
    android:id="@+id/gallery1" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:layout_alignParentBottom="true" 
    /> 

<ImageView 
    android:id="@+id/image1" 
    android:layout_width="320dp" 
    android:layout_height="400dp" 
    android:layout_above="@+id/gallery1" 
    android:scaleType="fitXY" /> 

</RelativeLayout> 

Answer 1

应该使用一个片段为这个像这样：

private void addCardFragment() { 
    String fragmentTag = getFragmentTag(); 
    FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction(); 
    fragmentTransaction.setCustomAnimations(R.animator.card_flip_in, R.animator.card_flip_out); 

    CardFragment fragment = new CardFragment(); 
    //set bundle with argument for image id to show if fragment 

    fragmentTransaction.replace(R.id.your_relative_or_frame_layout, CardFragment, fragmentTag); 
    fragmentTransaction.commit(); 
    fragmentTransaction = null; 
}