android设置图像作为联系人图标/壁纸

Question

我已经编写了自己的ImageViewer,现在我希望将Set设置为 Android原生ImageViewer中的功能.我现在有可能,因为Facebook有它.我附上了截图,让自己更加清晰.

PS我想更详细地解释出现了什么问题.在菜单中选择"联系人图标"后,将显示我的联系人列表.当我选择联系人时,申请人关闭.如果我选择"Home/Lock screen wallpaper",它会打开我手机的图库.这是我的代码片段:

                Bitmap icon = mBitmap;
                Intent setAs = new Intent(Intent.ACTION_ATTACH_DATA);
                setAs.setType("image/jpg");
                ByteArrayOutputStream bytes = new ByteArrayOutputStream();
                icon.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
                File f = new File(Environment.getExternalStorageDirectory() + File.separator + "/my_tmp_file.jpg");
                try {
                    f.createNewFile();
                    FileOutputStream fo = new FileOutputStream(f);
                    fo.write(bytes.toByteArray());
                } catch (IOException e) {                       
                    e.printStackTrace();
                }
                setAs.putExtra(Intent.EXTRA_STREAM, Uri.parse("file:///sdcard/my_tmp_file.jpg"));
                startActivity(Intent.createChooser(setAs, "Set Image As"));

我还为我的清单添加了后续权限,我可以将我的图像写入手机的SD卡.

Answer 1

来自Google Gallery 应用程序源代码：

// Called when "Set as" is clicked.
private static boolean onSetAsClicked(MenuInvoker onInvoke,
                                      final Activity activity) {
    onInvoke.run(new MenuCallback() {
        public void run(Uri u, IImage image) {
            if (u == null || image == null) {
                return;
            }

            Intent intent = Util.createSetAsIntent(image);
            activity.startActivity(Intent.createChooser(intent,
                    activity.getText(R.string.setImage)));
        }
    });
    return true;
}

来自Utils.java

// Returns an intent which is used for "set as" menu items.
public static Intent createSetAsIntent(IImage image) {
    Uri u = image.fullSizeImageUri();
    Intent intent = new Intent(Intent.ACTION_ATTACH_DATA);
    intent.setDataAndType(u, image.getMimeType());
    intent.putExtra("mimeType", image.getMimeType());
    return intent;
}