インストール済みのパッケージを取得する

PackageManagerを使う

Main.java

package com.efolab.listofinstalled;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import android.app.Activity;
import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.graphics.Color;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.LinearLayout;
import android.widget.ListView;

public class Main extends Activity {

	/** Called when the activity is first created. */
	Context context;
	LinearLayout layout;					
	
	ListView lv;
	ArrayList<Map<String,String>> collection;
	@Override
	public void onCreate(Bundle savedInstanceState) {
	    super.onCreate(savedInstanceState);
	
	    // TODO Auto-generated method stub
	    context = getApplicationContext();
	    layout = new LinearLayout(context);
	    layout.setOrientation(LinearLayout.VERTICAL);
	    
	    setContentView(layout);
	    
	    //ListView instatnce
	    lv = new ListView(context);
	    lv.setBackgroundColor(Color.BLACK);
	    layout.addView(lv);
	    
	    /*
	     * インストール済みのパッケージ検索
	     */
	    List<ApplicationInfo> list = getInstalledPackageList();
	    
	    ArrayAdapter<String> adapter = new ArrayAdapter<String>(context, android.R.layout.simple_list_item_1);
	    for(int i=0;i<list.size();i++){
	    	adapter.add(list.get(i).packageName);
	    }
	    lv.setAdapter(adapter);
	}
	private List<ApplicationInfo> getInstalledPackageList() {
		PackageManager pm = getPackageManager();

		List<ApplicationInfo> list = pm
				.getInstalledApplications(PackageManager.GET_META_DATA);

		return list;
	}
}

Manifest.xml

• 特段なにも不要

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.efolab.listofinstalled"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity android:name="Main">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
    </application>

</manifest>