如何调整图像大小来设置为适合屏幕的壁纸

Question

我有位图图像，当我要设置为壁纸时，它是模糊的，它不适合屏幕..如何设置适当的屏幕尺寸以及如何获得屏幕尺寸与图像设置......如何解决这个问题..

class MyPagerAdapter extends PagerAdapter { 
    int breadset; 
    int forwall; 
    public int[] images1 = { R.drawable.s_1, R.drawable.s_2, R.drawable.s_3 }; 
    public int[] images2 = { R.drawable.s_5, R.drawable.s_6, R.drawable.s_4 }; 

    public MyPagerAdapter(int gotbread) { 
     this.breadset = gotbread; 
     // TODO Auto-generated constructor stub 
    } 

    public int setcall() { 
     return forwall; 

    } 

    public int getCount() { 
     return images1.length; 
    } 

    public Object instantiateItem(View collection, int position) { 
     LayoutInflater inflater = (LayoutInflater) collection.getContext() 
       .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
     View view = null; 

     view = inflater.inflate(R.layout.layout_fullscreen_view, null); 
     ((ViewPager) collection).addView(view, 0); 
     Button btn = (Button) view.findViewById(R.id.wallb); 
     ImageView iv = (ImageView) view.findViewById(R.id.imgDisplay); 

     switch (breadset) { 
     case 0: 
      iv.setImageResource(images1[position]); 
      break; 
     case 1: 
      iv.setImageResource(images2[position]); 
     } 
     btn.setOnClickListener(new OnClickListener() { 

      @Override 
      public void onClick(View v) { 

       try { 
        WallpaperManager myWallpaperManager = WallpaperManager 
          .getInstance(getApplicationContext()); 
        switch (breadset) { 
        case 0: 
         myWallpaperManager.setResource(images1[forwall]); 

         break; 
        } 
        Context context = getApplicationContext(); 
        CharSequence text = "wallpaper has been set to your screen!"; 
        int duration = Toast.LENGTH_SHORT; 

        Toast toast = Toast.makeText(context, text, duration); 
        toast.show(); 

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

       // TODO Auto-generated method stub 

      } 

     }); 

     return view; 
    } 

    public void destroyItem(View arg0, int arg1, Object arg2) { 
     ((ViewPager) arg0).removeView((View) arg2); 
    } 

    public boolean isViewFromObject(View arg0, Object arg1) { 
     return arg0 == ((View) arg1); 
    } 

} 

Answer 1

您可以使用此功能：

public void decodeFile(String filePath) { 

    // Decode image size 
    BitmapFactory.Options o = new BitmapFactory.Options(); 
    o.inJustDecodeBounds = true; 
    BitmapFactory.decodeFile(filePath, o); 

    // The new size we want to scale to 
    final int REQUIRED_SIZE = 1024; 

    // Find the correct scale value. It should be the power of 2. 
    int width_tmp = o.outWidth, height_tmp = o.outHeight; 
    int scale = 3; 
    while (true) { 
     if (width_tmp < REQUIRED_SIZE && height_tmp < REQUIRED_SIZE) 
      break; 
     width_tmp /= 2; 
     height_tmp /= 2; 
     scale *= 2; 
    } 

    // Decode with inSampleSize 
    BitmapFactory.Options o2 = new BitmapFactory.Options(); 
    o2.inSampleSize = scale; 
    mPhoto = BitmapFactory.decodeFile(filePath, o2); 
    myBitmap = ExifUtils.rotateBitmap(filePath, mPhoto); 

    image.setImageBitmap(myBitmap); 
} 

您还可以this