问题
I am Using Nostra Universal Image Loader plugin, I would like to be able to see the currently image on the ViewPager as the Phone Wallpaper.
My code below can set the wallpaper, but its not he currently image thats is displaying on the ViewPager, it will be a image before or a image after, and sometimes a ramdom image of the Sting Array.
public class ImagePagerFragment extends Fragment {
public static final String TAG = ImagePagerFragment.class.getSimpleName();
VarController vc;
public static final int INDEX = 2;
public String[] imageUrls;
DisplayImageOptions options;
ImageView imageView;
Button buttonSetWallpaper;
WallpaperManager wallManager;
ViewPager pager;
int storePosition;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.i(TAG, "onCreate");
options = new DisplayImageOptions.Builder()
.showImageForEmptyUri(R.drawable.ic_empty)
.showImageOnFail(R.drawable.ic_error)
.resetViewBeforeLoading(true)
.cacheOnDisk(true)
//.imageScaleType(ImageScaleType.EXACTLY)
.imageScaleType(ImageScaleType.EXACTLY_STRETCHED)
.bitmapConfig(Bitmap.Config.RGB_565)
.considerExifParams(true)
.displayer(new FadeInBitmapDisplayer(300))
.build();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.custom_fr_image_pager, container, false);
pager = (ViewPager) rootView.findViewById(R.id.pager);
Log.i(TAG, "onCreateView");
//getActivity().getSupportActionBar().show();
// Initiates
imageUrls = null;
String DateTempVC = vc.readPref_HOLDER_TMP_DATA();
wallManager = WallpaperManager.getInstance(AppApplication.getAppContext());
buttonSetWallpaper = (Button) rootView.findViewById(R.id.buttonSetWallpaper);
buttonSetWallpaper.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Perform action on click
Log.d(TAG, "buttonSetWallpaper.setOnClickListener - storePosition=> " + storePosition);
try {
setWall();
} catch(Exception e){
e.printStackTrace();
Log.e(TAG, "buttonSetWallpaper.setOnClickListener > Exception => " + e);
}
}
});
pager.setAdapter(new ImageAdapter());
pager.setCurrentItem(getArguments().getInt(Constants.Extra.IMAGE_POSITION, 0));
return rootView;
}//end onCreateView
// fetch bitmap from view
public static Bitmap getBitmapFromView(View view) {
Bitmap returnedBitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(returnedBitmap);
Drawable bgDrawable = view.getBackground();
if (bgDrawable != null)
bgDrawable.draw(canvas);
else
// if we unable to get background drawable then we will set white color as wallpaper
canvas.drawColor(Color.WHITE);
view.draw(canvas);
return returnedBitmap;
}
public void setWall() {
//WallpaperManager myWallpaperManager = WallpaperManager.getInstance(getApplicationContext());
try {
// below line of code will set your current visible pager item to wallpaper
// first we have to fetch bitmap from visible view and then we can pass it to wallpaper
wallManager.setBitmap(getBitmapFromView(pager.getChildAt(1)));
// below line of code will set input stream data directly to wallpaper
// myWallpaperManager.setStream(InputStream Data);
// below line of code will set any image which is in the drawable folder
// myWallpaperManager.setResource(R.drawable.icon);
} catch (IOException e) {
e.printStackTrace();
Log.e(TAG, "setWall > IOException => " + e);
}
}
/* public void setWallPaper() { //--TRY 2, THIS ONE DONT WORK
Load image from array reading VC
//Bitmap bmpImg = ((BitmapDrawable)imageView.getDrawable()).getBitmap();
try {
wallManager.setBitmap(loadedImage);
Toast.makeText(getActivity(), "Wallpaper Set Successfully!!", Toast.LENGTH_SHORT).show();
} catch (IOException e) {
Toast.makeText(getActivity(), "Setting WallPaper Failed!!", Toast.LENGTH_SHORT).show();
}
}//end setWallPaper
*/
//------------------------------------------------------------------------------------------------------
// ImagePagerAdapter
//------------------------------------------------------------------------------------------------------
private class ImageAdapter extends PagerAdapter {
private LayoutInflater inflater;
ImageAdapter() {
inflater = LayoutInflater.from(getActivity());
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
}
@Override
public int getCount() {
return imageUrls.length;
}
@Override
public Object instantiateItem(ViewGroup view, final int position) {
View imageLayout = inflater.inflate(R.layout.item_pager_image, view, false);
assert imageLayout != null;
imageView = (ImageView) imageLayout.findViewById(R.id.image);
final ProgressBar spinner = (ProgressBar) imageLayout.findViewById(R.id.loading);
storePosition = position;
Log.v(TAG, "instantiateItem position=> " + position);
ImageLoader.getInstance().displayImage(imageUrls[position], imageView, options, new SimpleImageLoadingListener() {
@Override
public void onLoadingStarted(String imageUri, View view) {
spinner.setVisibility(View.VISIBLE);
Log.i(TAG, "onLoadingStarted position=> " + position + " | Image=> " + imageUrls[position]);
}
@Override
public void onLoadingFailed(String imageUri, View view, FailReason failReason) {
vc = new VarController(AppApplication.getAppContext());
String message = null;
switch (failReason.getType()) {
case IO_ERROR:
message = "Input/Output error";
break;
case DECODING_ERROR:
message = "Image can't be decoded";
break;
case NETWORK_DENIED:
message = "Downloads are denied";
break;
case OUT_OF_MEMORY:
message = "Out Of Memory error";
break;
case UNKNOWN:
message = "Unknown error";
break;
}
Log.e(TAG, "onLoadingFailed error => " + message);
Utils.createUserLogParseOb(getActivity(), TAG, "onLoadingFailed", message, "", vc.readCountryPref(), vc.readIMEIPref());
Utils.makeToast(getActivity(), getString(R.string.sorry_there_was_an_error), false);
spinner.setVisibility(View.GONE);
}
@Override
public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
spinner.setVisibility(View.GONE);
Log.w(TAG, "onLoadingComplete | " + position + " | " + loadedImage.toString() + " | " + imageUri.toLowerCase());
}
});
view.addView(imageLayout, 0);
return imageLayout;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view.equals(object);
}
@Override
public void restoreState(Parcelable state, ClassLoader loader) {
}
@Override
public Parcelable saveState() {
return null;
}
}
I Also try passing the currently position from the pager as : But it also dont work and crash as Java NULL point Exception
buttonSetWallpaper.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Perform action on click
Log.d(TAG, "buttonSetWallpaper.setOnClickListener - storePosition=> " + storePosition);
try {
setWall(storePosition);
} catch(Exception e){
e.printStackTrace();
Log.e(TAG, "buttonSetWallpaper.setOnClickListener > Exception => " + e);
}
}
});
public void setWall(int i) {
//WallpaperManager myWallpaperManager = WallpaperManager.getInstance(getApplicationContext());
try {
// below line of code will set your current visible pager item to wallpaper
// first we have to fetch bitmap from visible view and then we can pass it to wallpaper
wallManager.setBitmap(getBitmapFromView(pager.getChildAt(i)));
// below line of code will set input stream data directly to wallpaper
// myWallpaperManager.setStream(InputStream Data);
// below line of code will set any image which is in the drawable folder
// myWallpaperManager.setResource(R.drawable.icon);
} catch (IOException e) {
e.printStackTrace();
Log.e(TAG, "setWall > IOException => " + e);
}
}
this was using the sample from rajpara
回答1:
Sorry for the delay power went out, I don't know if this is the right solution but it works for me, found my code btw:
I used the public Object instantiateItem
Below is my code snippet of it:
@Override
public Object instantiateItem(ViewGroup view, final int position) {
View imageLayout = inflater.inflate(R.layout.item_pager_image, view, false);
assert imageLayout != null;
final ImageView imageView = (ImageView) imageLayout.findViewById(R.id.image);
final ProgressBar spinner = (ProgressBar) imageLayout.findViewById(R.id.loading);
final View makePrimaryLayout =imageLayout.findViewById(R.id.makePrimaryLayout);
makePrimaryLayout.setVisibility(View.GONE);
Button makePrimBtn = (Button)imageLayout.findViewById(R.id.btnPrime);
makePrimBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
WallpaperManager myWallpaperManager = WallpaperManager.getInstance(getApplicationContext());
try {
// below line of code will set your current visible pager item to wallpaper
// first we have to fetch bitmap from visible view and then we can pass it to wallpaper
imageView.buildDrawingCache();
Bitmap bmp = imageView.getDrawingCache();
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
int height = metrics.heightPixels;
int width = metrics.widthPixels;
Bitmap bitmap = Bitmap.createScaledBitmap(bmp , width, height, true);
myWallpaperManager.setWallpaperOffsetSteps(1, 1);
myWallpaperManager.suggestDesiredDimensions(width, height);
myWallpaperManager.setBitmap(bitmap);
// below line of code will set input stream data directly to wallpaper
// myWallpaperManager.setStream(InputStream Data);
// below line of code will set any image which is in the drawable folder
// myWallpaperManager.setResource(R.drawable.icon);
} catch (IOException e) {
e.printStackTrace();
}
}
});
imageLoader.displayImage(images[position], imageView, options, new SimpleImageLoadingListener() {
@Override
public void onLoadingStarted(String imageUri, View view) {
spinner.setVisibility(View.VISIBLE);
}
@Override
public void onLoadingFailed(String imageUri, View view, FailReason failReason) {
String message = null;
switch (failReason.getType()) {
case IO_ERROR:
message = "Input/Output error";
break;
case DECODING_ERROR:
message = "Image can't be decoded";
break;
case NETWORK_DENIED:
message = "Downloads are denied";
break;
case OUT_OF_MEMORY:
message = "Out Of Memory error";
break;
case UNKNOWN:
message = "Unknown error";
break;
}
Toast.makeText(ImagePagerActivity.this, message, Toast.LENGTH_SHORT).show();
spinner.setVisibility(View.GONE);
}
@Override
public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
}
});
view.addView(imageLayout, 0);
return imageLayout;
}
and in your manifest add this:
<uses-permission android:name="android.permission.SET_WALLPAPER_HINTS" />
I used the imageview itself to get the image and get the bitmap in that imageview after that I scaled the bitmap. I hope this is what your are looking for. :)
来源：https://stackoverflow.com/questions/27414798/set-image-wallaper-of-viewpager-in-universal-image-loader-uil