android调用自带文件选择器获取指定文件，编写解析Uri获取文件绝对路径

标题有点长，不多说

   Intent intent=new Intent(Intent.ACTION_GET_CONTENT);
        intent.setType("text/plain");
        intent.addCategory(Intent.CATEGORY_OPENABLE);
        startActivityForResult(intent,REC_REQUESTCODE);

其中“text/plain”是文件的后缀名所对应的MIME类型
当指定两种或两种以上指定文件类型格式是：

//intent.setType("video/*;image/*");//同时选择视频和图片

随手贴上常用的MIME类型

//{后缀名，MIME类型} 
{".3gp", "video/3gpp"}, 
{".apk", "application/vnd.android.package-archive"}, 
{".asf", "video/x-ms-asf"}, 
{".avi", "video/x-msvideo"}, 
{".bin", "application/octet-stream"}, 
{".bmp", "image/bmp"}, 
{".c", "text/plain"}, 
{".class", "application/octet-stream"}, 
{".conf", "text/plain"}, 
{".cpp", "text/plain"}, 
{".doc", "application/msword"}, 
{".docx", "application/vnd.openxmlformats-officedocument.wordprocessingml.document"},
{".xls", "application/vnd.ms-excel"}, 
{".xlsx", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"}, 
{".exe", "application/octet-stream"}, 
{".gif", "image/gif"}, 
{".gtar", "application/x-gtar"}, 
{".gz", "application/x-gzip"}, 
{".h", "text/plain"}, 
{".htm", "text/html"}, 
{".html", "text/html"}, 
{".jar", "application/java-archive"}, 
{".java", "text/plain"}, 
{".jpeg", "image/jpeg"}, 
{".jpg", "image/jpeg"}, 
{".js", "application/x-javascript"}, 
{".log", "text/plain"}, 
{".m3u", "audio/x-mpegurl"}, 
{".m4a", "audio/mp4a-latm"}, 
{".m4b", "audio/mp4a-latm"}, 
{".m4p", "audio/mp4a-latm"}, 
{".m4u", "video/vnd.mpegurl"}, 
{".m4v", "video/x-m4v"}, 
{".mov", "video/quicktime"}, 
{".mp2", "audio/x-mpeg"}, 
{".mp3", "audio/x-mpeg"}, 
{".mp4", "video/mp4"}, 
{".mpc", "application/vnd.mpohun.certificate"}, 
{".mpe", "video/mpeg"}, 
{".mpeg", "video/mpeg"}, 
{".mpg", "video/mpeg"}, 
{".mpg4", "video/mp4"}, 
{".mpga", "audio/mpeg"}, 
{".msg", "application/vnd.ms-outlook"}, 
{".ogg", "audio/ogg"}, 
{".pdf", "application/pdf"}, 
{".png", "image/png"}, 
{".pps", "application/vnd.ms-powerpoint"}, 
{".ppt", "application/vnd.ms-powerpoint"}, 
{".pptx", "application/vnd.openxmlformats-officedocument.presentationml.presentation"},
{".prop", "text/plain"}, 
{".rc", "text/plain"}, 
{".rmvb", "audio/x-pn-realaudio"}, 
{".rtf", "application/rtf"}, 
{".sh", "text/plain"}, 
{".tar", "application/x-tar"}, 
{".tgz", "application/x-compressed"}, 
{".txt", "text/plain"}, 
{".wav", "audio/x-wav"}, 
{".wma", "audio/x-ms-wma"}, 
{".wmv", "audio/x-ms-wmv"}, 
{".wps", "application/vnd.ms-works"}, 
{".xml", "text/plain"}, 
{".z", "application/x-compress"}, 
{".zip", "application/x-zip-compressed"}, 
{"", "*/*"} 
}; 

因为 managedQuery(uri, new String[]{“*”}, null, null, null);方法过时等等等原因，我决定自己解析Uri，在onActivityResult()进行解析操作

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (resultCode ==Activity.RESULT_OK&&requestCode==REC_REQUESTCODE){
            Uri uri = data.getData();//得到uri，后面就是将uri转化成file的过程。
            String string =uri.toString();
            File file;
            String a[]=new String[2];
            //判断文件是否在sd卡中
            if (string.indexOf(String.valueOf(Environment.getExternalStorageDirectory()))!=-1){
                //对Uri进行切割
                a = string.split(String.valueOf(Environment.getExternalStorageDirectory()));
                //获取到file
                file = new File(Environment.getExternalStorageDirectory(),a[1]);
            }else if(string.indexOf(String.valueOf(Environment.getDataDirectory()))!=-1){ //判断文件是否在手机内存中
                //对Uri进行切割
                a =string.split(String.valueOf(Environment.getDataDirectory()));
                //获取到file
                file = new File(Environment.getDataDirectory(),a[1]);
            }else{
                //出现其他没有考虑到的情况
                MyToast.makeshow(this,"文件路径解析失败！",Toast.LENGTH_SHORT);
                return;
            }
                i(TAG, "onActivityResult" + file.getAbsolutePath());
        }
    }

好到。到此位置获取到了文件绝对路径，接下来的对文件的操作就自行发挥了。

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