获取具有 2 个或更多活动的应用程序

Question

我正在为 android 编写启动器应用程序。我可以使用

获取所有应用程序的列表并启动可用的活动

ArrayList<PInfo> res = new ArrayList<PInfo>();
List<PackageInfo> packs = ctx.getPackageManager().getInstalledPackages(PackageManager.GET_ACTIVITIES);

final PackageItemInfo.DisplayNameComparator comparator = new PackageItemInfo.DisplayNameComparator(ctx.getPackageManager());

Collections.sort(packs, new Comparator<PackageInfo>() {
    @Override
    public int compare(PackageInfo lhs, PackageInfo rhs) {
        return comparator.compare(lhs.applicationInfo, rhs.applicationInfo);
    }
});

for (int i = 0; i < packs.size(); i++) {
    PackageInfo p = packs.get(i);
    if (p.packageName != null && ctx.getPackageManager().getLaunchIntentForPackage(p.packageName) != null ) {
        PInfo newInfo = new PInfo();
        if (p.applicationInfo.loadLabel(ctx.getPackageManager()).toString().length() > 15) {
            newInfo.appname = p.applicationInfo.loadLabel(ctx.getPackageManager()).toString().substring(0, 15);
        } else {
            newInfo.appname = p.applicationInfo.loadLabel(ctx.getPackageManager()).toString();
        }
        newInfo.packageName = p.packageName;
        newInfo.icon = p.applicationInfo.loadIcon(ctx.getPackageManager());
        res.add(newInfo);
    }
}

这个。

但是，问题是，有 2 个可启动的活动包括 phone 和联系人应用程序。

我的意思是，例如三星在同一个包中包含联系人启动 activity 和 phone 启动 activity。但是使用此代码我只能将联系人应用程序放入我的视图中，phone 应用程序丢失。其他发射器如何处理这个？或者我错过了什么？

Answer 1

不要寻找应用程序。在 PackageManager.

上使用 queryIntentActivities() 寻找可启动的活动

例如，此 activity（来自 this sample project）使用此技术实现了主屏幕样式的启动器：

/***
  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));
    }
  }
}

获取具有 2 个或更多活动的应用程序

Getting applications with 2 or more activities

java

android

launcher

android-launcher