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。
下面我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阵列的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;
}
}
我也尝试将当前位置从寻呼机传递为：但它也不起作用并因为Java NULL点异常而崩溃
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
中的示例答案 0 :(得分：1)
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
以下是我的代码片段：
@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：
<uses-permission android:name="android.permission.SET_WALLPAPER_HINTS" />
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。 ：）