Question

public class MainActivity extends Activity implements ViewSwitcher.ViewFactory, OnItemSelectedListener {  
 private Gallery gallery;                                                                            
 private ImageSwitcher imageSwitcher;                               
 private ImageAdapter ia;   
 private int res_id;
 private Bitmap mBitmap;

 @Override  
 public void onCreate(Bundle savedInstanceState) {  
      super.onCreate(savedInstanceState);  
      setContentView(R.layout.activity_main);  

      gallery = (Gallery) findViewById(R.id.gallery);                    
      imageSwitcher = (ImageSwitcher) findViewById(R.id.image_switcher);  

      imageSwitcher.setFactory(this);             
      imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(this,  
                android.R.anim.fade_in));  
      imageSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this,  
                android.R.anim.fade_out));  



      ia = new ImageAdapter(this);  
      gallery.setAdapter(ia);  

      //Event listener
      gallery.setOnItemSelectedListener(this);  
 }  
 public boolean onCreateOptionsMenu(Menu menu)
 {
     MenuInflater menuInflater = getMenuInflater();
     menuInflater.inflate(R.layout.menu, menu);
     return true;
 }
 public boolean onOptionsItemSelected(MenuItem item)
 {

     switch (item.getItemId())
     {
         case R.id.menu_save:


        mBitmap = BitmapFactory.decodeResource(getResources(),res_id);

        String filename = "barca_"+res_id+".jpg";
        File sd = Environment.getExternalStorageDirectory();
        String full_path=sd.getAbsolutePath()+"/BarcaWallpapers/";
        File temp=new File(full_path);
        temp.mkdirs();
        File dest = new File(temp,filename);
        try {
               FileOutputStream out = new FileOutputStream(dest);
               mBitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);
              Toast.makeText(this, "Saved in Folder "+full_path, Toast.LENGTH_SHORT).show();
        } catch (Exception e) {
               e.printStackTrace();
              Toast.makeText(this, "error", Toast.LENGTH_LONG).show();
        }
         return true;

     case R.id.menu_set_wallpapaer:
         final WallpaperManager wallpaperManager = WallpaperManager.getInstance(MainActivity.this);

        try{

        wallpaperManager.setResource(res_id);
        Toast.makeText(this,"Wallpaper Set", Toast.LENGTH_SHORT).show();
         }
        catch(Exception e)
        {
            Toast.makeText(this, "error setting wallpaper", Toast.LENGTH_SHORT).show();

        }
         return true;

     default:
         return super.onOptionsItemSelected(item);
     }
 }    
 public void onNothingSelected(AdapterView<?> parent) {  
 } 




 public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { 
     int imageResourceId = (Integer) ia.getItem(position); 

     res_id=imageResourceId;

     imageSwitcher.setImageResource(imageResourceId);

}  



public View makeView() {  
     ImageView i = new ImageView(this);  
     i.setScaleType(ImageView.ScaleType.FIT_CENTER); 

     i.setLayoutParams(new ImageSwitcher.LayoutParams(LayoutParams.FILL_PARENT,
             LayoutParams.FILL_PARENT));
     return i;  
}  


 private class ImageAdapter extends BaseAdapter {  
      private Context context;  

      private ImageAdapter(Context context) {  
           this.context = context;  
      }  

      private int[] IMAGE_IDS = {  
               R.drawable.img1,R.drawable.img2,R.drawable.img3,R.drawable.img4,R.drawable.img5,R.drawable.img6,

                   };  

      public int getCount() {  
           return IMAGE_IDS.length;  
      }  

      public Object getItem(int position) {  
           return IMAGE_IDS[position];  
      }  

      public long getItemId(int position) {  
          return IMAGE_IDS[position];
      }  

      public View getView(int position, View convertView, ViewGroup parent) {  

             ImageView imageView;
    if (convertView == null) {  
        imageView = new ImageView(context);


        imageView.setLayoutParams(new Gallery.LayoutParams(120,120));

        imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);

    } else {
        imageView = (ImageView) convertView;
    }

    imageView.setImageResource(IMAGE_IDS[position]);

    return imageView;


      }  
 }

}

我有上面的壁纸应用程序代码。活动xml布局文件包含图库视图和其下方的图像切换器，用户可以在其中浏览和浏览图库，并在图像切换器中打开相应的图像。然后，用户可以将图像设置为墙纸或保存到SD卡。上面的代码适用于小图像，但对于大型图像（例如我打算在应用程序中使用的图像）而失败。应用程序在内存不足时崩溃（openglrenderer内存不足）。我该如何解决？请帮助我，我花了一个多小时来解决这个问题。感谢

如何快速填充图库和Imageswitcher？

0 个答案: