ApplicationUtil.java

package com.dh.foundation.app;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.pm.ActivityInfo;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.telephony.TelephonyManager;

import com.dh.foundation.utils.DLoggerUtils;
import com.dh.foundation.manager.FoundationManager;

/**
 * 应用程序信息工具类
 * Created By: Seal.Wu
 * Date: 2015/8/27
 * Time: 16:52
 */
public class ApplicationUtil {

    private final static Context context = FoundationManager.getContext();
    private static ApplicationInfo APPLICATION_INFO;
    private static PackageInfo PACKAGE_INFO;

    static {
        initInfos();
    }

    private static void initInfos() {
        try {
            APPLICATION_INFO = context.getPackageManager()
                    .getApplicationInfo(context.getPackageName(),
                            PackageManager.GET_META_DATA);
        } catch (PackageManager.NameNotFoundException e) {
            DLoggerUtils.e(e);
        }

        try {
            PACKAGE_INFO = context.getPackageManager().getPackageInfo(context.getPackageName(), 0);
        } catch (PackageManager.NameNotFoundException e) {
            DLoggerUtils.e(e);
        }
    }

    public static String getAppName()//获取应用名称
    {
        if (APPLICATION_INFO != null) {

            int labelRes = APPLICATION_INFO.labelRes;
            return labelRes != 0 ? context.getString(labelRes) : "未知应用";
        } else {
            initInfos();
            if (APPLICATION_INFO != null) {

                int labelRes = APPLICATION_INFO.labelRes;
                return labelRes != 0 ? context.getString(labelRes) : "未知应用";
            } else {
                return "未知应用";
            }
        }
    }

    public static String getVersionName()//获取版本号
    {
        if (PACKAGE_INFO != null) {

            return PACKAGE_INFO.versionName;
        } else {
            initInfos();
            if (PACKAGE_INFO != null) {

                return PACKAGE_INFO.versionName;
            } else {
                return "未知版本号";
            }
        }
    }

    public static String getPackageName()//获取包名
    {
        if (PACKAGE_INFO != null) {

            return PACKAGE_INFO.packageName;
        } else {
            initInfos();
            if (PACKAGE_INFO != null) {

                return PACKAGE_INFO.packageName;
            } else {
                return "未知版本号";
            }
        }
    }

    public static int getVersionCode()//获取版本号(内部识别号)
    {
        if (PACKAGE_INFO != null) {

            return PACKAGE_INFO.versionCode;
        } else {
            initInfos();
            if (PACKAGE_INFO != null) {

                return PACKAGE_INFO.versionCode;
            } else {
                return 0;
            }
        }
    }


    /**
     * 获取应用程序icon
     */
    public static int getApplicationIcon() {
        if (APPLICATION_INFO != null) {

            return APPLICATION_INFO.icon;
        } else {
            initInfos();
            if (APPLICATION_INFO != null) {

                return APPLICATION_INFO.icon;
            } else {
                return android.R.drawable.sym_def_app_icon;
            }
        }
    }

    /**
     * 获取Application内的metadata的对应key的值(P: 无论是哪种类型的数据都可以获取，并最终返回String类型)
     */
    public static String getApplicationInfoMetaData(String key) {

        if (APPLICATION_INFO != null) {

            return String.valueOf(APPLICATION_INFO.metaData.get(key));
        } else {
            initInfos();
            if (APPLICATION_INFO != null) {

                return String.valueOf(APPLICATION_INFO.metaData.get(key));
            } else {
                return null;
            }
        }
    }

    public static String getActivityMetaData(Activity activity, String key) {

        ActivityInfo info = null;
        try {
            info = activity.getPackageManager()
                    .getActivityInfo(getComponentName(activity),
                            PackageManager.GET_META_DATA);
        } catch (PackageManager.NameNotFoundException e) {
           DLoggerUtils.e(e);
        }
        if (info != null) {

            return String.valueOf(info.metaData.get(key));
        } else {
            return null;
        }
    }

    public static ComponentName getComponentName(Context context) {
        return new ComponentName(context, context.getClass());
    }

    /**
     * 获取唯一设备号
     * */
    public static String getIMEI() {
        TelephonyManager telephonyManager = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);
        if (null == telephonyManager.getDeviceId()) {
            return "未知";
        }
        return telephonyManager.getDeviceId();
    }

}