在Universal Image Loader UIL中设置ViewPager的Image Wallaper
我正在使用Nostra Universal Image Loader插件，我希望能够将ViewPager上的当前图像看作手机壁纸。
我下面的代码可以设置壁纸，但不是他当前在ViewPager上显示的图像，它将是之前的图像或之后的图像，有时是Sting Array的ramdom图像。
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; } } 我也尝试从寻呼机传递当前位置为：但它也不工作并崩溃为Java NULL点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); } }
这是使用rajpara的样本
很抱歉延迟电源耗尽，我不知道这是否是正确的解决方案，但它适用于我，发现我的代码顺便说一句：
我使用了public Object instantiateItem
下面是我的代码片段：
@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; }
并在你的清单中添加：
我使用了imageview本身来获取图像，然后在该图像视图中获取位图，之后我缩放了位图。 我希望这是你正在寻找的。 🙂