获取手机所有安装APP的信息

最新推荐文章于 2022-08-08 20:53:32 发布

yangshuaiMAX

最新推荐文章于 2022-08-08 20:53:32 发布

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本文链接：https://blog.youkuaiyun.com/qq_36580253/article/details/79196919

本文介绍了一种方法来获取Android设备上所有已安装应用程序的信息，包括应用名称、图标、包名、路径、大小、版本号及首次安装时间，并提供了一个按名称排序的应用列表。

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public List<AppInfo> getAppInfo() {
    // 获得PackageManager对象
    mPm = this.getPackageManager();
    List<PackageInfo> packageInfoList = mPm.getInstalledPackages(0);
    // 根据name排序
    Collections.sort(packageInfoList, new Comparator<PackageInfo>() {
        @Override
        public int compare(PackageInfo p1, PackageInfo p2) {
            String name1 = (String) mPm.getApplicationLabel(p1.applicationInfo);
            String name2 = (String) mPm.getApplicationLabel(p2.applicationInfo);
            return name1.compareTo(name2);
        }
    });
    mInfoList = new ArrayList<>();
    for(PackageInfo info :packageInfoList){
        AppInfo appInfo = new AppInfo();
        //应用名称
        String appName = (String) mPm.getApplicationLabel(info.applicationInfo);
        //图标
        Drawable icon = info.applicationInfo.loadIcon(mPm);
        //包名
        String packageName = info.applicationInfo.packageName;
        //路径
        String path = info.applicationInfo.sourceDir;
        //大小
        File file=new File(path);
        String size = formatFileSize(file.length());
        //版本
        String versionName = info.versionName;
        //第一次安装时间
        long firstInstallTime = info.firstInstallTime;
        SimpleDateFormat format=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date d1 =new Date(firstInstallTime);
        String firstTime=format.format(d1);
        appInfo.setPkgName(packageName);
        appInfo.setAppIcon(icon);
        appInfo.setVersionName(versionName);
        appInfo.setAppName(appName);
        appInfo.setPkgPath(path);
        appInfo.setCodeSize(size);
        appInfo.setAppDate(firstTime);
        mInfoList.add(appInfo);
    }
    return mInfoList;
}

/**
 * 格式化
 * @param length
 * @return
 */
public static String formatFileSize(long length) {
    String result = null;
    int sub_string = 0;
    // 如果文件长度大于1GB
    if (length >= 1073741824) {
        sub_string = String.valueOf((float) length / 1073741824).indexOf(
                ".");
        result = ((float) length / 1073741824 + "000").substring(0,
                sub_string + 3) + "GB";
    } else if (length >= 1048576) {
        // 如果文件长度大于1MB且小于1GB,substring(int beginIndex, int endIndex)
        sub_string = String.valueOf((float) length / 1048576).indexOf(".");
        result = ((float) length / 1048576 + "000").substring(0,
                sub_string + 3) + "MB";
    } else if (length >= 1024) {
        // 如果文件长度大于1KB且小于1MB
        sub_string = String.valueOf((float) length / 1024).indexOf(".");
        result = ((float) length / 1024 + "000").substring(0,
                sub_string + 3) + "KB";
    } else if (length < 1024)
        result = Long.toString(length) + "B";
    return result;
}

/**
 * 根据包名启动APP
 * @param packagename 包名
 */
private void doStartApplicationWithPackageName(String packagename) {
    // 创建一个类别为CATEGORY_LAUNCHER的该包名的Intent
    Intent resolveIntent = new Intent(Intent.ACTION_MAIN, null);
    resolveIntent.addCategory(Intent.CATEGORY_LAUNCHER);
    resolveIntent.setPackage(packagename);
    // 通过getPackageManager()的queryIntentActivities方法遍历
    List<ResolveInfo> resolveinfoList = getPackageManager()
            .queryIntentActivities(resolveIntent, 0);
    if(resolveinfoList.size() == 0){
        return;
    }
    ResolveInfo resolveinfo = resolveinfoList.iterator().next();
    if (resolveinfo != null) {
        String packageName = resolveinfo.activityInfo.packageName;
        //App启动的Activity
        String className = resolveinfo.activityInfo.name;
        // LAUNCHER Intent
        Intent intent = new Intent(Intent.ACTION_MAIN);
        intent.addCategory(Intent.CATEGORY_LAUNCHER);
        // 设置ComponentName参数1:packagename参数2:启动的Activity
        ComponentName cn = new ComponentName(packageName, className);
        intent.setComponent(cn);
        startActivity(intent);
    }
}