What does it mean for a method to be deprecated, and how can I resolve resulting errors?

Question

Why do I get a deprecation error on the line containing setWallpaper(bmp), and how can I resolve it?

Error: The method setWallpaper(Bitmap) from the type Context is deprecated

switch(v.getId()){
 case R.id.bSetWallpaper:
try {
            getApplicationContext().setWallpaper(bmp);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        break;

Answer 1

When something is deprecated, it means the developers have created a better way of doing it and that you should no longer be using the old, or deprecated way. Things that are deprecated are subject to removal in the future.

In your case, the correct way to set the wallpaper if you have an image path is as follows:

is = new FileInputStream(new File(imagePath));
bis = new BufferedInputStream(is);
Bitmap bitmap = BitmapFactory.decodeStream(bis);
Bitmap useThisBitmap = Bitmap.createScaledBitmap(
    bitmap, parent.getWidth(), parent.getHeight(), true);
bitmap.recycle();
if(imagePath!=null){
    System.out.println("Hi I am try to open Bit map");
    wallpaperManager = WallpaperManager.getInstance(this);
    wallpaperDrawable = wallpaperManager.getDrawable();
    wallpaperManager.setBitmap(useThisBitmap);

If you have an image URI, then use the following:

wallpaperManager = WallpaperManager.getInstance(this);
wallpaperDrawable = wallpaperManager.getDrawable();
mImageView.setImageURI(imagepath);

From Maidul's answer to this question.

Answer 2

"Deprecated" means that the particular code you are using is no longer the recommended method of achieving that functionality. You should look at the documentation for your given method, and it will more than likely provide a link to the recommended method in it's place.