我如何製作一個按鈕作爲設置壁紙按鈕？

Question

該代碼包含一個按鈕（必須添加到清單文件中）的圖庫，我只需要一個關於按鈕操作的建議;放在裏面有什麼「imageIDs *或位引用其先前被點擊，顯示的圖像

下面是完整的代碼：

package net.keivan.gallery; 

import java.io.IOException; 
import android.app.Activity; 
import android.app.ProgressDialog; 
import android.app.WallpaperManager; 
import android.content.Context; 
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.pic1, 
     R.drawable.pic2, 
     R.drawable.pic3, 
     R.drawable.pic4, 
     R.drawable.pic5, 
     R.drawable.pic6, 
     R.drawable.pic8, 
     R.drawable.pic9, 
     R.drawable.pic10, 


}; 








/** 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) 
     { 

      //---Displays the name of images as just as i click on them--- 

      Toast.makeText(getBaseContext(), 
        "pic" + (position + 1) + " selected", 
        Toast.LENGTH_SHORT).show(); 

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


     } 
    }); 
} 


//---Set Wallpaper button--- 

public void onClick(View v) { 




    try { 


/*at this part can you suggest what to put inside "imageIDs* or *bitmap* to reference 
      to the image which previously is clicked and shown*/ 

/* first.the activity is created second.the image which i clicked is shown third.whin 
      the user click on the button the image which previously is clicked on is set as background.*/ 




        WallpaperManager.getInstance(this).setResource(imageIDs[position]); 

        //WallpaperManager.getInstance(this).setBitmap(mBitmap); 



    } catch (IOException e) { 

    // TODO Auto-generated catch block 

    e.printStackTrace(); 
    } 

} 


/////////////////////////////////////////////// 

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(); 
    } 


    { getApplicationContext().getWallpaper(); } 
    //---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; 
    } 
} 

} 

Answer 1

try { 
    // Set background from a resource 
    WallpaperManager.getInstance(this).setResource(imageIDs[position]); 
    // or set background from a bitmap 
    //WallpaperManager.getInstance(this).setBitmap(mBitmap); 

} catch (IOException e) { 
// TODO Auto-generated catch block 
e.printStackTrace(); 
} 

在您的清單文件：

<uses-permission android:name="android.permission.SET_WALLPAPER"></uses-permission>