android获取友盟渠道名以及获取application中的meta-data

获取友盟渠道名

/**
     * 获取渠道名
     * @param ctx 此处习惯性的设置为activity，实际上context就可以
     * @return 如果没有获取成功，那么返回值为空
     */
    public static String getChannelName(Activity ctx) {
        if (ctx == null) {
            return null;
        }
        String channelName = null;
        try {
            PackageManager packageManager = ctx.getPackageManager();
            if (packageManager != null) {
                //注意此处为ApplicationInfo 而不是 ActivityInfo,因为友盟设置的meta-data是在application标签中，而不是某activity标签中，所以用ApplicationInfo
                ApplicationInfo applicationInfo = packageManager.getApplicationInfo(ctx.getPackageName(), PackageManager.GET_META_DATA);
                if (applicationInfo != null) {
                    if (applicationInfo.metaData != null) {

<span style="white-space:pre">			</span>//key换成说需要的key
                        channelName = applicationInfo.metaData.getString(key);
                    }
                }

            }
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
        return channelName;
    }

提取为通用方法：

  /**
     * 获取application中指定的meta-data
     * @return 如果没有获取成功(没有对应值，或者异常)，则返回值为空
     */
    public static String getAppMetaData(Context ctx, String key) {
        if (ctx == null || TextUtils.isEmpty(key)) {
            return null;
        }
        String resultData = null;
        try {
            PackageManager packageManager = ctx.getPackageManager();
            if (packageManager != null) {
                ApplicationInfo applicationInfo = packageManager.getApplicationInfo(ctx.getPackageName(), PackageManager.GET_META_DATA);
                if (applicationInfo != null) {
                    if (applicationInfo.metaData != null) {
                        resultData = applicationInfo.metaData.getString(key);
                    }
                }

            }
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }

        return resultData;
    }