android - 以编程方式设置锁屏壁纸 Android

Question

我正在使用unsplashapi 构建壁纸应用程序。我已获取图像并显示在应用程序中。我有一个按钮，它显示一个对话框以设置为主屏幕（工作正常）或锁定屏幕壁纸。

当我尝试设置锁屏壁纸时会出现这里的问题，它不会更改锁屏上的图像。这是我的代码片段：

setBtn.setOnClickListener(new View.OnClickListener() {
        @TargetApi(Build.VERSION_CODES.N)
        @Override
        public void onClick(View view) {
            if (validate()) {
                if (homeCheckBox.isChecked() && largeURL != null) {
                    setHomeWallpaper(largeURL);
                    getDialog().dismiss();
                }

                if (lockCheckBox.isChecked() && largeURL != null) {
                    setLockWallpaper(largeURL);
                    getDialog().dismiss();
                }

            } else {
                Toast.makeText(getContext(), "Select an Option", Toast.LENGTH_SHORT).show();
            }
        }
    });

并设置锁屏壁纸：

private void setLockWallpaper(final String largeURL) {
    final WallpaperManager wpm = WallpaperManager.getInstance(getActivity());
    if (Build.VERSION.SDK_INT >= 24){
        if (wpm.isSetWallpaperAllowed()) {
            Log.d(TAG, "Lock Screen Wallpapers Supported");
            makeLockWallpaper(wpm, largeURL);
            getDialog().dismiss();
        } else {
            Toast.makeText(getActivity(), "Your Device Does Not Support Lock Screen Wallpapers", Toast.LENGTH_SHORT).show();
        }
    } else {
        makeLockWallpaper(wpm, largeURL);
        getDialog().dismiss();
    }
}

private void makeLockWallpaper(final WallpaperManager wpm, final String largeURL) {
    new Thread(new Runnable() {
        @TargetApi(Build.VERSION_CODES.N)
        @Override
        public void run() {
            URL url = null;
            try {
                url = new URL(largeURL);
                Bitmap bitmap = BitmapFactory.decodeStream(url.openConnection().getInputStream());
                InputStream stream = Utils.bitmapToStream(bitmap);

                // set wp
                wpm.setStream(stream, null, true, WallpaperManager.FLAG_LOCK);
            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    });
}

要设置主屏幕壁纸，我使用过Picasso这样的方法，它可以工作：

private void setHomeWallpaper(String largeURL) {
    final WallpaperManager wpm = WallpaperManager.getInstance(getActivity());
    Picasso.with(getActivity())
            .load(largeURL)
            .into(new Target() {
                @Override
                public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
                    try {
                        wpm.setBitmap(bitmap);
                        Toast.makeText(getActivity(), "Your New Wallpaper Has Been Set", Toast.LENGTH_SHORT).show();
                        getDialog().dismiss();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }

                @Override
                public void onBitmapFailed(Drawable errorDrawable) {
                    Log.d(TAG, "Bitmap Load Failed");
                    Toast.makeText(getActivity(), "Could Not Set Wallpaper...Choose Another", Toast.LENGTH_SHORT).show();
                    getDialog().dismiss();
                }

                @Override
                public void onPrepareLoad(Drawable placeHolderDrawable) {
                    Log.d(TAG, "Prep to Load Bitmap");
                }
            });
}

但由于锁定屏幕的标志，我必须使用任何一个setStream or setResource。有谁知道毕加索是否可以解决这个问题，因为至少我知道图像是否准备好，Picasso callbacks或者建议我改进我的代码以设置锁屏壁纸。谢谢。

标签： androidpicassolockscreenandroid-wallpaper