对于某些应用程序,getLaunchIntentForPackage为null

Question

我正在构建一项服务,将安装的应用程序列表从Android TV或Fire TV发送到手机.然后,手机会发回它想要启动的应用程序的程序包名称,然后服务就会启动它.

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

public void launchApp(String packageName) {
    PackageManager pm = getPackageManager();
    Intent intent = pm.getLaunchIntentForPackage(packageName);
    startActivity(intent);
}

在Fire TV上,一切都很完美,但在Android TV上,许多应用程序的意图始终为空.这些才一点点.

• com.haystack.android
• com.netflix.ninja
• tv.pluto.android
• com.bamnetworks.mlbtv

但是使用相同的代码,这些应用程序工作正常.

• com.hulu.livingroomplus
• com.sling
• com.frogmind.badland
• com.songza.tv

谁能提供任何有关我可能做错的见解？

谢谢!

编辑: 我也试过这个,我得到了例外

android.content.ActivityNotFoundException:找不到处理Intent的活动{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:

这是适合我的代码:

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);
    }
}

Answer 1

在 Android 11 中，您只能使用 获取有限数量的包名称 getInstalledApplications()，并且只能使用 获取其中某些包的意图 getLaunchIntentForPackage()。

将此权限添加到您的 Android Manifest 文件中以获取所有应用程序包名称和意图。

<uses-permission android:name="android.permission.QUERY_ALL_PACKAGES"/>

如果您只想要有限数量的应用程序的意图，您应该在 Android 清单文件中使用查询。

<queries>
    <package android:name="packageName" />
</queries>

Answer 2

要创建主屏幕风格的启动器,请不要查找应用程序,然后尝试Intents为每个应用程序启动.寻找可启动的活动,使用queryIntentActivities()on PackageManager.

例如,此活动(来自此示例项目)使用此技术实现主屏幕样式启动器:

/***
  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使用的活动,特定于电视的APK可能没有常规LAUNCHER活动,或者至多有一个不一定适合在电视上使用.

Answer 3

自 Android 11 以来，行为发生了变化，除非您queries向 AndroidManifest添加标记，否则某些应用将不会提供此信息

    <queries>
        <package android:name="app.i.want.to.query" />
    </queries>

请参阅此处了解更多信息