获取应用程序的信息

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1、获取应用程序名

PackageManager pm = context.getPackageManager();

ApplicationInfo ai = pm.getApplicationInfo(context.getPackageName(), 0);

CharSequence cs = pm.getApplictionLabel(ai);

2、获取应用程序的版本号：

PackageManager pm = context.getPackageManager();

String version = pm.getPackageInfo(context.getPackageName(), 0).versionName;

3、获取os版本

Build.VERSION.SDK_INT其对应的值可能存在Build.VERSION_CODES

String osVersion = Build.VERSION.RELEASE;

package com.example.androidtest;import android.content.ContentResolver;import android.content.Context;import android.content.pm.ApplicationInfo;import android.content.pm.PackageManager;import android.content.pm.PackageManager.NameNotFoundException;import android.os.Build;public final class AndroidInfo{    private static final String EMULATOR_ID = "ffffffffffffffff";    public static CharSequence getApplicationLabel(Context context)    {        try        {            PackageManager pm = context.getPackageManager();            ApplicationInfo ai = pm.getApplicationInfo(context.getPackageName(),0);            return pm.getApplicationLabel(ai);        }        catch (NameNotFoundException e)        {            return "AnonDroid";        }    }    public static String getApplicationVersion(Context context)    {        try        {            PackageManager pm = context.getPackageManager();            return pm.getPackageInfo(context.getPackageName(),0).versionName;        }        catch (NameNotFoundException e)        {            return "";        }    }    public static boolean isOnEmulator(Context context)    {        if ("sdk".equals(Build.MODEL) && "sdk".equals(Build.PRODUCT))        {            return true;        }        return getUniqueDeviceID(context).equals(EMULATOR_ID);    }    public static String getDeviceModel()    {        StringBuilder ret = new StringBuilder();        if ("sdk".equals(Build.MODEL) && "sdk".equals(Build.PRODUCT))        {            return "SDK Emulator";        }        ret.append(Build.MODEL).append(" [");        ret.append(Build.MANUFACTURER).append(" ");        ret.append(Build.PRODUCT).append("]");        return ret.toString();    }    public static String getOSVersion()    {        if (Build.VERSION.SDK_INT == Build.VERSION_CODES.CUR_DEVELOPMENT)        {            return "DEV";        }        return Build.VERSION.RELEASE;    }    public static String getUniqueDeviceID(Context context)    {        ContentResolver contentResolver = context.getContentResolver();        String id = android.provider.Settings.System.getString(contentResolver,android.provider.Settings.System.ANDROID_ID);        if (id == null)        {            id = EMULATOR_ID; // running on emulator.        }        return id;    }    /**     * Build an HTTP User-Agent suitable enough to identify this application + version + handset     */    public static String getUserAgent(Context context)    {        StringBuilder ua = new StringBuilder();        ua.append(AndroidInfo.getApplicationLabel(context)).append("/");        ua.append(AndroidInfo.getApplicationVersion(context));        ua.append(" (Android ").append(AndroidInfo.getOSVersion());        ua.append("/").append(AndroidInfo.getDeviceModel()).append(")");        return ua.toString();    }    private AndroidInfo()    {        /* prevent instantiation */    }}

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