獲取已安裝APP的信息

import android.annotation.SuppressLint;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.pm.ResolveInfo;
import android.content.pm.Signature;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.text.TextUtils;

import com.olemob.activity.OlemobApplication;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;


public class AppInfoUtil {

    /**
     * 是否爲系統App
     *
     * @param info
     * @return
     */
    public static boolean isSystemApp(PackageInfo info) {
        return null != info && ((info.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0);
    }

    /**
     * 是否爲系統軟件的更新軟件
     *
     * @param info
     * @return
     */
    public static boolean isSystemUpdateApp(PackageInfo info) {
        return null != info && ((info.applicationInfo.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) != 0);
    }

    /**
     * 是否爲非系統應用
     *
     * @param info
     * @return
     */
    public static boolean isUserApp(PackageInfo info) {
        return (!isSystemApp(info) && !isSystemUpdateApp(info));
    }

    /**
     * 是否爲系統應用
     *
     * @param info
     * @return
     */
    public static boolean isSysApp(PackageInfo info) {
        return isSystemApp(info) || isSystemUpdateApp(info);
    }

    /**
     * 是否爲非系統應用
     *
     * @param pkgName
     * @return
     */
    public static boolean isUserApp(String pkgName) {
        return !isSystemApp(pkgName);
    }

    /**
     * 判斷某個應用是否是系統應用或者系統升級應用
     *
     * @param pkgName
     * @return
     */
    public static boolean isSystemApp(String pkgName) {
        try {
            PackageInfo pInfo = OlemobApplication.getInstance().getPackageManager().getPackageInfo(pkgName, 0);

            return ((pInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) || ((pInfo.applicationInfo
                .flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) != 0);

        } catch (NameNotFoundException e) {
            LogUtil.e(e);
        }

        return false;
    }

    /**
     * 根據包名得到App名
     *
     * @param context
     * @param pkgName
     * @return AppName
     */
    public static String getAppNameByPkgName(Context context, String pkgName) {
        if (TextUtils.isEmpty(pkgName)) {
            return "";
        }
        String name = null;

        PackageManager pm = context.getPackageManager();
        try {
            ApplicationInfo info = pm.getApplicationInfo(pkgName, PackageManager.PERMISSION_GRANTED);
            name = (String)pm.getApplicationLabel(info);
        } catch (NameNotFoundException e) {
            LogUtil.e(e);
        }

        return name;
    }

    /**
     * 根據包名獲得版本號
     *
     * @param context
     * @param pkgName
     * @return
     * @since 2015年6月4日
     */
    public static int getVersionCode(Context context, String pkgName) {
        if (TextUtils.isEmpty(pkgName)) {
            return 0;
        }
        int verName;
        try {
            PackageManager pm = context.getPackageManager();
            PackageInfo pi = pm.getPackageInfo(pkgName, 0);
            if (pi == null) {
                return 0;
            } else {
                verName = pi.versionCode;
                return verName;
            }
        } catch (Exception ignored) {
        }
        return 0;
    }

    /**
     * 根據包名獲得版本號
     *
     * @param context
     * @param pkgName
     * @return
     * @since 2015年6月4日
     */
    public static String getVersionName(Context context, String pkgName) {
        if (TextUtils.isEmpty(pkgName)) {
            return null;
        }
        String verName;
        try {
            PackageManager pm = context.getPackageManager();
            PackageInfo pi = pm.getPackageInfo(pkgName, 0);
            if (pi == null) {
                return null;
            } else {
                verName = pi.versionName;
                return verName;
            }
        } catch (Exception ignored) {
        }
        return null;
    }

    public static Drawable getAppIcon(Context context, String pkgName) {
        if (TextUtils.isEmpty(pkgName)) {
            return null;
        }
        Drawable icon = null;

        PackageManager pm = context.getPackageManager();
        try {
            PackageInfo info = pm.getPackageInfo(pkgName, PackageManager.PERMISSION_GRANTED);
            icon = info.applicationInfo.loadIcon(pm);
        } catch (Exception e) {
            LogUtil.e(e);
        }

        return icon;
    }

    /**
     * 批量獲取應用圖標。<br>
     * <font color=red>注意：不要一次獲取過多</font>
     *
     * @param context
     * @param pkgs
     * @return
     * @since 2015年6月3日
     */
    public static List<Drawable> getAppIcon(Context context, List<String> pkgs) {
        if (pkgs == null || pkgs.isEmpty()) {
            return null;
        }
        List<Drawable> iconList = new ArrayList<>();

        PackageManager pm = context.getPackageManager();
        try {
            for (String pkgName : pkgs) {
                PackageInfo info = pm.getPackageInfo(pkgName, PackageManager.PERMISSION_GRANTED);
                Drawable icon = info.applicationInfo.loadIcon(pm);
                iconList.add(icon);
            }
        } catch (Exception e) {
            LogUtil.e(e);
        }

        return iconList;
    }

    /**
     * 當前 是否可以 isDisabled
     * If app's state is enable, you can disable it. or you can enable it.
     * if return true, you can enable the app;
     * if return false,you can disable the app.(不知道語法對不對，先這樣寫吧)
     *
     * @param context
     * @param pkgName
     * @return
     */
    public static boolean isSystemAppDisabled(Context context, String pkgName) {
        boolean isDisabled = false;
        try {
            PackageManager pkgMgr = context.getPackageManager();
            if (pkgMgr != null) {
                @SuppressLint("PackageManagerGetSignatures") PackageInfo pkgInfo = pkgMgr
                    .getPackageInfo(pkgName, PackageManager.GET_SIGNATURES);
                @SuppressLint("PackageManagerGetSignatures") PackageInfo sysPkgInfo = pkgMgr
                    .getPackageInfo("android", PackageManager.GET_SIGNATURES);
                if (pkgInfo != null && pkgInfo.signatures != null && pkgInfo.signatures.length > 0 && sysPkgInfo !=
                    null && sysPkgInfo.signatures != null && sysPkgInfo.signatures.length > 0) {
                    isDisabled = (sysPkgInfo.signatures[0]
                        .equals(pkgInfo.signatures[0])) || (!pkgInfo.applicationInfo.enabled);// 未開啓
                }
            }
        } catch (Exception e) {
            LogUtil.e(e);
        }

        return isDisabled;
    }

    /**
     * 判斷一個Intent是否可用。
     *
     * @param context 上下文
     * @param intent  Intent
     * @return
     * @since 2014年12月22日
     */
    public static boolean isIntentAvailable(final Context context, final Intent intent) {
        final PackageManager packageManager = context.getPackageManager();
        List<ResolveInfo> resolveInfo = packageManager.queryIntentActivities(intent, PackageManager.GET_INTENT_FILTERS);
        return resolveInfo.size() > 0;
    }

    /**
     * 查看某一應用  Disable or enabled
     *
     * @param context
     * @param pkgName
     * @return
     */
    public static boolean getAppleState(Context context, String pkgName) {
        boolean isEnable = true;

        try {
            PackageManager pkgMgr = context.getPackageManager();
            if (pkgMgr != null) {
                PackageInfo pkgInfo = pkgMgr.getPackageInfo(pkgName, 0);
                if (pkgInfo != null) {
                    ApplicationInfo appInfo = pkgInfo.applicationInfo;
                    if (appInfo != null) {
                        isEnable = appInfo.enabled;
                    }
                }
            }
        } catch (Exception e) {
            LogUtil.e(e);
        }

        return isEnable;
    }

    /**
     * 獲取安裝的 應用總數
     *
     * @param context
     * @return
     */
    public static int getAllAppCount(Context context) {
        int appCount = 0;

        try {
            PackageManager pkgMgr = context.getPackageManager();
            if (pkgMgr != null) {
                List<PackageInfo> apps = pkgMgr.getInstalledPackages(0);
                if (apps != null) {
                    appCount = apps.size();
                }
            }
        } catch (Exception e) {
            LogUtil.e(e);
        }

        return appCount;
    }

    /**
     * 獲取手機上所有的App
     *
     * @param context
     * @return
     */
    public static List<PackageInfo> getAllAppList(Context context) {
        PackageManager pkgMgr = context.getPackageManager();

        List<PackageInfo> apps = null;
        if (null != pkgMgr) {
            try {
                apps = pkgMgr.getInstalledPackages(0);
            } catch (Exception ignored) {
            }
        }

        return apps;
    }

    /**
     * 獲取手機上所有的非系統App
     *
     * @param context
     * @return
     */
    public static List<PackageInfo> getUserAppList(Context context) {
        PackageManager pkgMgr = context.getPackageManager();

        List<PackageInfo> apps = null;
        if (null != pkgMgr) {
            try {
                apps = pkgMgr.getInstalledPackages(0);
            } catch (Exception ignored) {
            }
        }

        List<PackageInfo> userAppList = null;
        if (null != apps && apps.size() > 0) {
            userAppList = new ArrayList<>();
            for (int i = 0; i < apps.size(); i++) {
                if (!isSysApp(apps.get(i))) {
                    userAppList.add(apps.get(i));
                }
            }
        }

        return userAppList;
    }

    /**
     * 獲取簽名的MD5
     * return 簽名的md5
     */
    public static String getSignMd5Str(String pkgName) {
        byte[] sign = getSignInfo(pkgName);
        if (null == sign || sign.length == 0) {
            return null;
        }
        String signMd5 = null;
        try {
            signMd5 = Md5Util.getMD5String(sign);
        } catch (Exception e) {
            LogUtil.e(e);
        }
        return signMd5;
    }

    /**
     * 獲取App簽名
     */
    public static byte[] getSignInfo(String pkgName) {
        if (TextUtils.isEmpty(pkgName)) {
            return null;
        }
        try {
            @SuppressLint("PackageManagerGetSignatures") PackageInfo packageInfo = OlemobApplication.getInstance()
                .getPackageManager().getPackageInfo(pkgName, PackageManager.GET_SIGNATURES);
            Signature[] signs = packageInfo.signatures;
            Signature sign = signs[0];

            return sign.toByteArray();
        } catch (Exception e) {
            LogUtil.e(e);
        }

        return null;
    }

    /**
     * 該方法耗時0.5秒，請注意在子線程下運行
     *
     * @param pkgName
     */
    public static String getApkMd5(String pkgName) {
        try {
            String apkPaths = getExecResult("pm path " + pkgName);
            if (TextUtils.isEmpty(apkPaths)) {
                return "";
            }
            String path = apkPaths;
            String[] pathArray = apkPaths.split(":");
            if (pathArray.length >= 2) {
                path = pathArray[1];
            }
            String md5String = getExecResult("md5 " + path);
            if (!TextUtils.isEmpty(md5String) && md5String.contains("/")) {
                md5String = md5String.substring(0, md5String.indexOf("/")).trim();
            }
            return md5String;
        } catch (Exception ignored) {
        }
        return "";
    }

    private static String getExecResult(String argsString) {
        Process process = null;
        DataOutputStream dataOutputStream = null;
        try {
            process = Runtime.getRuntime().exec(argsString);
            dataOutputStream = new DataOutputStream(process.getOutputStream());
            BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
            final StringBuilder log = new StringBuilder();
            boolean firstLine = true;
            String line;
            while ((line = reader.readLine()) != null) {
                if (!firstLine) {
                    log.append("*#*");
                } else {
                    firstLine = false;
                }
                log.append(line);
            }
            return log.toString();
        } catch (Exception ignored) {
        } finally {
            try {
                if (dataOutputStream != null)
                    dataOutputStream.close();
                if (process != null)
                    process.destroy();
            } catch (Exception ignored) {
            }
        }
        return "";
    }

    public static void gotoMarket(Context context, String pkgName) {
        if (context == null || TextUtils.isEmpty(pkgName)) {
            return;
        }
        try {
            Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=" + pkgName));
            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            context.startActivity(intent);
        } catch (Exception e) {
            LogUtil.e(e);
        }
    }
}