我想利用内置的意图选择器来显示自定义过滤的应用列表，供用户选择和启动。
我知道如何获取已安装软件包的列表：
final Intent myIntent = new Intent(android.content.Intent.ACTION_MAIN);
List<ResolveInfo> resInfoList = getPackageManager().queryIntentActivities(myIntent, 0);
此时我想根据包名称中包含的特定字符串（或字符串的变体）过滤列表，我也可以弄清楚如何做。
但这就是我卡住的地方。据我所知，Intent.createChooser() 只接受一个目标 Intent 作为参数。我希望有一个基于包和类名或其他东西的意图列表的重载。但我没有看到类似的东西。我在某个地方错过了吗？
所以问题是，这可能与内置选择器有关，还是我必须使用 AlertDialog Builder 构建自己的选择器？我希望避免后者。
提前致谢。
【问题讨论】：
这是我提出的一个解决方案。我使用它为选择器中的每个选择提供不同的意图数据，但您也可以轻松地从列表中删除一个意图。希望这会有所帮助：
List<Intent> targetedShareIntents = new ArrayList<Intent>();
Intent shareIntent = new Intent(android.content.Intent.ACTION_SEND);
shareIntent.setType("text/plain");
List<ResolveInfo> resInfo = getPackageManager().queryIntentActivities(shareIntent, 0);
if (!resInfo.isEmpty()) {
for (ResolveInfo resolveInfo : resInfo) {
String packageName = resolveInfo.activityInfo.packageName;
Intent targetedShareIntent = new Intent(android.content.Intent.ACTION_SEND);
targetedShareIntent.setType("text/plain");
targetedShareIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "subject to be shared");
if (TextUtils.equals(packageName, "com.facebook.katana")) {
targetedShareIntent.putExtra(android.content.Intent.EXTRA_TEXT, "http://link-to-be-shared.com");
} else {
targetedShareIntent.putExtra(android.content.Intent.EXTRA_TEXT, "text message to shared");
}
targetedShareIntent.setPackage(packageName);
targetedShareIntents.add(targetedShareIntent);
}
Intent chooserIntent = Intent.createChooser(targetedShareIntents.remove(0), "Select app to share");
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, targetedShareIntents.toArray(new Parcelable[targetedShareIntents.size()]));
startActivity(chooserIntent);
}
编辑
在使用此方法时，我将某些应用程序的名称获取为 android 系统。如果有人收到此错误，请在targetedShareIntents.add(targetedShareIntent);之前添加以下行
targetedShareIntent.setClassName(
resolveInfo.activityInfo.packageName,
resolveInfo.activityInfo.name);
来源：Android share intent Twitter: How to share only by Tweet or Direct Message?
【讨论】：
getPackageManager().queryIntentActivities(shareIntent, 0); 的应用程序顺序，请调用Intent chooserIntent = Intent.createChooser(targetedShareIntents.remove(targetedShareIntents.size()-1), "Select app to share");，选择器将其初始化意图添加到extra_initial_intents 的末尾:)
targetedShareIntent.setPackage(packageName) (developer.android.com/reference/android/content/…) 只允许来自给定包的意图（这将是从targetedShareIntents中选择的一个。然后附加自定义意图。要进一步改进此代码，请进一步指定 targetedShareIntent.setClassName(packageName,className)
选择器的唯一一个附加参数是Intent.EXTRA_INITIAL_INTENTS。它的描述是：
当使用
ACTION_CHOOSER向用户显示时，使用putExtra(String, Parcelable[])设置的其他活动的Parcelable[]或LabeledIntent对象将放置在选项列表的前面。
我没有在 Android 源代码中找到任何从列表中排除其他活动的方法，因此似乎无法使用选择器执行您想要执行的操作。
编辑：这很容易找到。只需检查ChooserActivity 和ResolverActivity 源代码。这些类相当小。
【讨论】：
我做了一个小修改，以列出您要按名称与之共享的应用程序。这几乎是您已经发布的内容，但添加了要按名称共享的应用
String[] nameOfAppsToShareWith = new String[] { "facebook", "twitter", "gmail" };
String[] blacklist = new String[]{"com.any.package", "net.other.package"};
// your share intent
Intent intent = new Intent(Intent.ACTION_SEND);
intent.setType("text/plain");
intent.putExtra(Intent.EXTRA_TEXT, "some text");
intent.putExtra(android.content.Intent.EXTRA_SUBJECT, "a subject");
// ... anything else you want to add invoke custom chooser
startActivity(generateCustomChooserIntent(intent, blacklist));
private Intent generateCustomChooserIntent(Intent prototype,
String[] forbiddenChoices)
{
List<Intent> targetedShareIntents = new ArrayList<Intent>();
List<HashMap<String, String>> intentMetaInfo = new ArrayList<HashMap<String, String>>();
Intent chooserIntent;
Intent dummy = new Intent(prototype.getAction());
dummy.setType(prototype.getType());
List<ResolveInfo> resInfo = getPackageManager().queryIntentActivities(dummy,0);
if (!resInfo.isEmpty())
{
for (ResolveInfo resolveInfo : resInfo)
{
if (resolveInfo.activityInfo == null
|| Arrays.asList(forbiddenChoices).contains(
resolveInfo.activityInfo.packageName))
continue;
//Get all the posible sharers
HashMap<String, String> info = new HashMap<String, String>();
info.put("packageName", resolveInfo.activityInfo.packageName);
info.put("className", resolveInfo.activityInfo.name);
String appName = String.valueOf(resolveInfo.activityInfo
.loadLabel(getPackageManager()));
info.put("simpleName", appName);
//Add only what we want
if (Arrays.asList(nameOfAppsToShareWith).contains(
appName.toLowerCase()))
{
intentMetaInfo.add(info);
}
}
if (!intentMetaInfo.isEmpty())
{
// sorting for nice readability
Collections.sort(intentMetaInfo,
new Comparator<HashMap<String, String>>()
{
@Override public int compare(
HashMap<String, String> map,
HashMap<String, String> map2)
{
return map.get("simpleName").compareTo(
map2.get("simpleName"));
}
});
// create the custom intent list
for (HashMap<String, String> metaInfo : intentMetaInfo)
{
Intent targetedShareIntent = (Intent) prototype.clone();
targetedShareIntent.setPackage(metaInfo.get("packageName"));
targetedShareIntent.setClassName(
metaInfo.get("packageName"),
metaInfo.get("className"));
targetedShareIntents.add(targetedShareIntent);
}
String shareVia = getString(R.string.offer_share_via);
String shareTitle = shareVia.substring(0, 1).toUpperCase()
+ shareVia.substring(1);
chooserIntent = Intent.createChooser(targetedShareIntents
.remove(targetedShareIntents.size() - 1), shareTitle);
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS,
targetedShareIntents.toArray(new Parcelable[] {}));
return chooserIntent;
}
}
return Intent.createChooser(prototype,
getString(R.string.offer_share_via));
}
这与 Makibo 发布的解决方案几乎相同，但添加了一些内容，以便通过添加名称来轻松选择您想要共享的应用程序，这样您就不会遇到任何问题，以防他们更改包名称或类似的东西。只要他们不改名字。
【讨论】：
我的自定义打开选择器的实现。
特点：
public static Intent createOpenFileIntent(Context context, String pathToFile) {
File file = new File(pathToFile);
String extension = extensionFromName(file.getName());
String mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension);
if (mimeType == null) {
//If android doesn't know extension we can check our own list.
mimeType = KNOWN_MIME_TYPES.get(DataViewHelper.extensionFromName(file.getName()));
}
Intent openIntent = new Intent();
openIntent.setAction(android.content.Intent.ACTION_VIEW);
openIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
openIntent.setDataAndType(Uri.fromFile(file), mimeType);
// 1. Check if there is a default app opener for this type of content.
final PackageManager packageManager = context.getPackageManager();
ResolveInfo defaultAppInfo = packageManager.resolveActivity(openIntent, PackageManager.MATCH_DEFAULT_ONLY);
if (!defaultAppInfo.activityInfo.name.endsWith("ResolverActivity")) {
return openIntent;
}
// 2. Retrieve all apps for our intent. If there are no apps - return usual already created intent.
List<Intent> targetedOpenIntents = new ArrayList<Intent>();
List<ResolveInfo> appInfoList = packageManager.queryIntentActivities(openIntent, PackageManager.MATCH_DEFAULT_ONLY);
if (appInfoList.isEmpty()) {
return openIntent;
}
// 3. Sort in alphabetical order, filter itself and create intent with the rest of the apps.
Collections.sort(appInfoList, new Comparator<ResolveInfo>() {
@Override
public int compare(ResolveInfo first, ResolveInfo second) {
String firstName = packageManager.getApplicationLabel(first.activityInfo.applicationInfo).toString();
String secondName = packageManager.getApplicationLabel(second.activityInfo.applicationInfo).toString();
return firstName.compareToIgnoreCase(secondName);
}
});
for (ResolveInfo appInfo : appInfoList) {
String packageName = appInfo.activityInfo.packageName;
if (packageName.equals(context.getPackageName())) {
continue;
}
Intent targetedOpenIntent = new Intent(android.content.Intent.ACTION_VIEW)
.setDataAndType(Uri.fromFile(file), mimeType)
.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
.setPackage(packageName);
targetedOpenIntents.add(targetedOpenIntent);
}
Intent chooserIntent = Intent.createChooser(targetedOpenIntents.remove(targetedOpenIntents.size() - 1), context.getString(R.string.context_menu_open_in))
.putExtra(Intent.EXTRA_INITIAL_INTENTS, targetedOpenIntents.toArray(new Parcelable[] {}));
return chooserIntent;
}
public static String extensionFromName(String fileName) {
int dotPosition = fileName.lastIndexOf('.');
// If extension not present or empty
if (dotPosition == -1 || dotPosition == fileName.length() - 1) {
return "";
} else {
return fileName.substring(dotPosition + 1).toLowerCase(Locale.getDefault());
}
}
【讨论】：
ResolveInfo.loadLabel(packageManager) 而不是packageManager.getApplicationLabel(ResolveInfo.activityInfo.applicationInfo)。结果并不总是相同的。 （这用于在步骤 3 中排序时覆盖 compare()）。例如，对于 Dropbox，loadLabel() 将返回“添加到 Dropbox”，getApplicationLabel() 将返回“Dropbox”。
我试图用 ShareActionProvider 做同样的事情。 gumbercules 帖子中的方法不适用于 ShareActionProvider，因此我复制并修改了 ShareActionProvider 相关类，以允许自定义过滤 ShareActionProvider 建议。
唯一的变化是 ActivityChooserModel.loadActivitiesIfNeeded() 方法。就我而言，我想过滤掉 YouTube 包。
public static final String YOUTUBE_PACKAGE = "com.google.android.youtube";
private boolean loadActivitiesIfNeeded() {
if (mReloadActivities && mIntent != null) {
mReloadActivities = false;
mActivities.clear();
List<ResolveInfo> resolveInfos = mContext.getPackageManager()
.queryIntentActivities(mIntent, 0);
final int resolveInfoCount = resolveInfos.size();
for (int i = 0; i < resolveInfoCount; i++) {
ResolveInfo resolveInfo = resolveInfos.get(i);
// Filter out the YouTube package from the suggestions list
if (!resolveInfo.activityInfo.packageName.equals(YOUTUBE_PACKAGE)) {
mActivities.add(new ActivityResolveInfo(resolveInfo));
}
}
return true;
}
return false;
}
代码https://github.com/danghiskhan/FilteredShareActionProvider
【讨论】：
此解决方案基于此帖子https://rogerkeays.com/how-to-remove-the-facebook-android-sharing-intent
// get available share intents
final String packageToBeFiltered = "com.example.com"
List<Intent> targets = new ArrayList<Intent>();
Intent template = new Intent(Intent.ACTION_SEND);
template.setType("text/plain");
List<ResolveInfo> candidates = this.getPackageManager().queryIntentActivities(template, 0);
// filter package here
for (ResolveInfo candidate : candidates) {
String packageName = candidate.activityInfo.packageName;
if (!packageName.equals(packageToBeFiltered)) {
Intent target = new Intent(android.content.Intent.ACTION_SEND);
target.setType("text/plain");
target.putExtra(Intent.EXTRA_TEXT, "Text to share"));
target.setPackage(packageName);
targets.add(target);
}
}
if (!targets.isEmpty()) {
Intent chooser = Intent.createChooser(targets.get(0), "Share dialog title goes here"));
chooser.putExtra(Intent.EXTRA_INITIAL_INTENTS, targets.toArray(new Parcelable[]{}));
startActivity(chooser);
}
【讨论】：