对于某些应用，getLaunchIntentForPackage 为 null [英] getLaunchIntentForPackage is null for some apps
问题描述
我正在构建一项服务，可将已安装应用的列表从 Android TV 或 Fire TV 发送到手机.然后手机发回它想要启动的应用程序的包名称，服务启动它.
I'm building a service that sends a list of installed apps from an Android TV or a Fire TV to a mobile phone. The phone then sends back the package name of the app it wants to launch and the service launches it.
这是创建列表的代码
public List<InstalledApp> GetInstalledApps(boolean isAndroid) {
PackageManager pm = getPackageManager();
List<ApplicationInfo> allPackages = pm.getInstalledApplications(PackageManager.GET_META_DATA);
List<InstalledApp> userPackages = new ArrayList<InstalledApp>();
for (ApplicationInfo packageInfo : allPackages) {
if (isSystemPackage(packageInfo)) continue;
InstalledApp app = new InstalledApp();
app.setPackageName(packageInfo.packageName);
app.setAppName(pm.getApplicationLabel(packageInfo).toString());
if (!isAndroid) {
app.setIcon(pm.getApplicationIcon(packageInfo));
}
app.setAccentColor(getAccentColor(pm.getApplicationIcon(packageInfo)));
userPackages.add(app);
}
return userPackages;
}
这就是我启动应用程序的方式
This is how I launch the apps
public void launchApp(String packageName) {
PackageManager pm = getPackageManager();
Intent intent = pm.getLaunchIntentForPackage(packageName);
startActivity(intent);
}
在 Fire TV 上一切正常，但在 Android TV 上，许多应用程序的意图始终为空.这些只是一些.
On the Fire TV everything works perfectly but on the Android TV the intent for many of the apps is always null. These are just a few.
- com.haystack.android
- com.netflix.ninja
- tv.pluto.android
- com.bamnetworks.mlbtv
但是使用相同的代码，这些应用程序运行良好.
However with the same code, these apps work just fine.
- com.hulu.livingroomplus
- com.sling
- com.frogmind.badland
- com.songza.tv
谁能就我可能做错的事情提供任何见解?
Could anyone provide any insight on what I might be doing wrong?
谢谢！
我也试过这个，但我得到了例外
I've also tried this and I get the exception
android.content.ActivityNotFoundException: 没有找到处理 Intent { cat=[android.intent.category.LEANBACK_LAUNCHER] flg=0x10000000 pkg=com.netflix.ninja }
android.content.ActivityNotFoundException: No Activity found to handle Intent { cat=[android.intent.category.LEANBACK_LAUNCHER] flg=0x10000000 pkg=com.netflix.ninja }
public void launchApp(String packageName) {
Intent intent = new Intent();
intent.setPackage(packageName);
intent.addCategory("android.intent.category.LEANBACK_LAUNCHER");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
编辑 2:
这是对我有用的代码:
public void launchApp(String packageName) {
Intent intent = new Intent();
intent.setPackage(packageName);
PackageManager pm = getPackageManager();
List<ResolveInfo> resolveInfos = pm.queryIntentActivities(intent, 0);
Collections.sort(resolveInfos, new ResolveInfo.DisplayNameComparator(pm));
if(resolveInfos.size() > 0) {
ResolveInfo launchable = resolveInfos.get(0);
ActivityInfo activity = launchable.activityInfo;
ComponentName name=new ComponentName(activity.applicationInfo.packageName,
activity.name);
Intent i=new Intent(Intent.ACTION_MAIN);
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK |
Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
i.setComponent(name);
startActivity(i);
}
}
推荐答案
要创建主屏幕风格的启动器，不要寻找应用程序，然后尝试为每个应用程序获取启动Intents.使用 PackageManager 上的 queryIntentActivities() 查找可启动的活动.
To create a home screen-style launcher, don't look for apps and then try to get launch Intents for each. Look for launchable activities, using queryIntentActivities() on PackageManager.
例如，这个活动(来自这个示例项目) 使用此技术实现主屏幕样式的启动器:
For example, this activity (from this sample project) implements a home screen-style launcher using this technique:
/***
Copyright (c) 2008-2012 CommonsWare, LLC
Licensed under the Apache License, Version 2.0 (the "License"); you may not
use this file except in compliance with the License. You may obtain a copy
of the License at http://www.apache.org/licenses/LICENSE-2.0. Unless required
by applicable law or agreed to in writing, software distributed under the
License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
OF ANY KIND, either express or implied. See the License for the specific
language governing permissions and limitations under the License.
From _The Busy Coder's Guide to Android Development_
http://commonsware.com/Android
*/
package com.commonsware.android.launchalot;
import android.app.ListActivity;
import android.content.ComponentName;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import java.util.Collections;
import java.util.List;
public class Launchalot extends ListActivity {
AppAdapter adapter=null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
PackageManager pm=getPackageManager();
Intent main=new Intent(Intent.ACTION_MAIN, null);
main.addCategory(Intent.CATEGORY_LAUNCHER);
List<ResolveInfo> launchables=pm.queryIntentActivities(main, 0);
Collections.sort(launchables,
new ResolveInfo.DisplayNameComparator(pm));
adapter=new AppAdapter(pm, launchables);
setListAdapter(adapter);
}
@Override
protected void onListItemClick(ListView l, View v,
int position, long id) {
ResolveInfo launchable=adapter.getItem(position);
ActivityInfo activity=launchable.activityInfo;
ComponentName name=new ComponentName(activity.applicationInfo.packageName,
activity.name);
Intent i=new Intent(Intent.ACTION_MAIN);
i.addCategory(Intent.CATEGORY_LAUNCHER);
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK |
Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
i.setComponent(name);
startActivity(i);
}
class AppAdapter extends ArrayAdapter<ResolveInfo> {
private PackageManager pm=null;
AppAdapter(PackageManager pm, List<ResolveInfo> apps) {
super(Launchalot.this, R.layout.row, apps);
this.pm=pm;
}
@Override
public View getView(int position, View convertView,
ViewGroup parent) {
if (convertView==null) {
convertView=newView(parent);
}
bindView(position, convertView);
return(convertView);
}
private View newView(ViewGroup parent) {
return(getLayoutInflater().inflate(R.layout.row, parent, false));
}
private void bindView(int position, View row) {
TextView label=(TextView)row.findViewById(R.id.label);
label.setText(getItem(position).loadLabel(pm));
ImageView icon=(ImageView)row.findViewById(R.id.icon);
icon.setImageDrawable(getItem(position).loadIcon(pm));
}
}
}
在 Android TV 设备上，您还应该搜索 LEANBACK_LAUNCHER 活动，因为这是 Android TV 使用的内容，并且特定于电视的 APK 可能没有常规的 LAUNCHER 活动，或者充其量有一个不一定适合在电视上使用.
On an Android TV device, you should also search for LEANBACK_LAUNCHER activities, as that's what Android TV uses, and TV-specific APKs might not have a regular LAUNCHER activity, or at best have one that is not necessarily ideal for use on a TV.
这篇关于对于某些应用，getLaunchIntentForPackage 为 null的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
