Android（java）学习笔记86：Android提供打开各种文件的API接口：setDataAndType

1. Android 打开各种文件（setDataAndType）

private void openFile(File file){ 

    Intent intent = new Intent();

    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

    //设置intent的Action属性

    intent.setAction(Intent.ACTION_VIEW);

    //获取文件file的MIME类型

        String type = getMIMEType(file);

    //设置intent的data和Type属性。

        intent.setDataAndType(/*uri*/Uri.fromFile(file), type);

    //跳转

       startActivity(intent);     //这里最好try一下，有可能会报错。 //比如说你的MIME类型是打开邮箱，但是你手机里面没装邮箱客户端，就会报错。



}

/**

 * 根据文件后缀名获得对应的MIME类型。

 * @param file

 */

private String getMIMEType(File file) { 

    String type="*/*";

    String fName = file.getName();

    //获取后缀名前的分隔符"."在fName中的位置。

        int dotIndex = fName.lastIndexOf(".");

    if(dotIndex < 0){

        return type;

    }

    /* 获取文件的后缀名*/

    String end=fName.substring(dotIndex,fName.length()).toLowerCase();

    if(end=="")return type;

    //在MIME和文件类型的匹配表中找到对应的MIME类型。

        for(int i=0;i<MIME_MapTable.length;i++){ //MIME_MapTable??在这里你一定有疑问，这个MIME_MapTable是什么？

               if(end.equals(MIME_MapTable[i][0]))

            type = MIME_MapTable[i][1];

    }

    return type;

}

MIME_MapTable是所有文件的后缀名所对应的MIME类型的一个String数组：

  <span style="white-space: pre;">    </span>private final String[][] MIME_MapTable={

            //{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"},

            {"",        "*/*"}

        };

1. Intent open a picture file public:

Intent intent = new Intent("android.intent.action.VIEW");

intent.addCategory("android.intent.category.DEFAULT");

intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK);

Uri uri = Uri.fromFile(new File("/mnt/sdcard/images/001041580.jpg"));

intent.setDataAndType (uri, "image/*");

this.startActivity(intent);

2. Intent to open a PDF file:

Intent intent = new Intent("android.intent.action.VIEW");

intent.addCategory("android.intent.category.DEFAULT");

intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK);

Uri uri = Uri.fromFile(new File("file:///android_asset/helphelp.pdf"));

intent.setDataAndType (uri, "application/pdf");

this.startActivity(intent);

3. Intent to open a text file:

Intent intent = new Intent("android.intent.action.VIEW");

intent.addCategory("android.intent.category.DEFAULT");

intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK);

if (paramBoolean)

{

Uri uri1 = Uri.parse (param);

intent.setDataAndType (URI1, "text/plain");

}

else

{

Uri uri = Uri.fromFile(new File("/mnt/sdcard/hello.txt"));

intent.setDataAndType (URI2, "text/plain");

}

this.startActivity(intent);

4. Intent to open the audio file:

Intent intent = new Intent("android.intent.action.VIEW");

intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

intent.putExtra ("oneshot", 0);

intent.putExtra ("configchange", 0);

Uri uri = Uri.fromFile(new File("/mnt/sdcard/ren.mp3"));

intent.setDataAndType (uri, "audio/*");

this.startActivity(intent);

5. Intent to open the video file:

Intent intent = new Intent("android.intent.action.VIEW");

intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

intent.putExtra ("oneshot", 0);

intent.putExtra ("configchange", 0);

Uri uri = Uri.fromFile(new File("/mnt/sdcard/ice.avi"));

intent.setDataAndType (uri, "video/*");

this.startActivity(intent);

6. Intent to open the CHM file:

Intent intent = new Intent("android.intent.action.VIEW");

intent.addCategory("android.intent.category.DEFAULT");

intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK);

Uri uri = Uri.fromFile(new File("/mnt/sdcard/ice.chm"));

intent.setDataAndType (uri, "application / x-chm");

this.startActivity(intent);

7. Intent to open a Word document:

Intent intent = new Intent("android.intent.action.VIEW");

intent.addCategory("android.intent.category.DEFAULT");

intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK);

Uri uri = Uri.fromFile(new File("/system/etc/help.doc"));

intent.setDataAndType(uri, "application/msword");

this.startActivity(intent);

8. Android Excel intent:

Intent intent = new Intent("android.intent.action.VIEW");

intent.addCategory("android.intent.category.DEFAULT");

intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK);

Uri uri = Uri.fromFile(new File("/mnt/sdcard/Book1.xls"));

intent.setDataAndType (uri, "application/vnd.ms-excel");

this.startActivity(intent);

9. Intent to open the PPT file:

Intent intent = new Intent("android.intent.action.VIEW");

intent.addCategory("android.intent.category.DEFAULT");

intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK);

Uri uri = Uri.fromFile(new

File("/mnt/sdcard/download/Android_PPT.ppt"));

intent.setDataAndType (uri, "application/vnd.ms-powerpoint");

this.startActivity(intent);

10.Display Html page:

Uri uri = Uri.parse ("http://www.google.com");

Intent intent = new Intent (Intent.ACTION_VIEW, uri);

this.startActivity(intent);

11. Show map:

Uri uri = Uri.parse ("geo: 38.899533, -77.036476");

Intent intent = new Intent (Intent.Action_VIEW, uri);

this.startActivity(intent);

12. Call the dialer:

Uri uri = Uri.parse ("tel: xxxxxx");

Intent intent = new Intent (Intent.ACTION_DIAL, uri);

this.startActivity(intent);

13. Call :

Uri uri = Uri.parse ("tel: xxxxxx");

Intent it = new Intent (Intent.ACTION_CALL, uri);

this.startActivity(intent);

/*permission:

<uses-permission id="android.permission.CALL_PHONE">

</uses-permission> */

14. Call to send text messages of the program :

Intent intent = new Intent (Intent.ACTION_VIEW);

intent.putExtra("sms_body", "The SMS text");

intent.setType("vnd.android-dir/mms-sms");

this.startActivity(intent);

15. Send SMS :

Uri uri = Uri.parse("smsto:0800000123");

Intent intent = new Intent(Intent.ACTION_SENDTO, uri);

intent.putExtra("sms_body", "The SMS text");

this.startActivity(intent);

16. Send MMS :

Uri uri = Uri.parse("content://media/external/images/media/23");
Intent intent = new Intent(Intent.ACTION_SEND);
intent.putExtra("sms_body", "some text");
intent.putExtra(Intent.EXTRA_STREAM, uri);
intent.setType("image/png");
this.startActivity(intent);

17. Send an Email :

Uri uri = Uri.parse ("mailto: xxx@abc.com");
Intent intent = new Intent (Intent.ACTION_SENDTO, uri);
this.startActivity(intent);

18. Send an Email with body :

Intent intent = new Intent(Intent.ACTION_SEND);
intent.putExtra(Intent.EXTRA_EMAIL,"me@abc.com");
intent.putExtra(Intent.EXTRA_TEXT,"The email body text");
intent.setType ("text/plain");
this.startActivity(
Intent.createChooser(intent, "Choose Email Client"));

19. Send an Email with body,to,cc :

Intent intent = new Intent(Intent.ACTION_SEND);
String [] tos ={"me@abc.com"};
String [] ccs ={"you@abc.com"};
intent.putExtra(Intent.EXTRA_EMAIL, tos);
intent.putExtra(Intent.EXTRA_CC, ccs);
intent.putExtra(Intent.EXTRA_TEXT, "The email body text");
intent.putExtra(Intent.EXTRA_SUBJECT, "The email subject text");
intent.setType("message/rfc822");
this.startActivity(
Intent.createChooser(intent, "Choose Email Client"));

20. Send an Email with attachments :

Intent intent = new Intent(Intent.ACTION_SEND);
intent.putExtra(Intent.EXTRA_SUBJECT,"The email subject text");
intent.putExtra(Intent.EXTRA_STREAM,"file :///sdcard/mysong.mp3");
sendIntent.setType("audio/mp3");
this.startActivity(
Intent.createChooser(intent,"Choose Email Client"));

21. Uninstall the program :

Uri uri = Uri.fromParts ("package", strPackageName, null);
Intent intent = new Intent (Intent.ACTION_DELETE, uri);
this.startActivity(
Intent.createChooser(intent,"Choose Email Client"));

22. Install the apk :

Uri installUri = Uri.fromParts("package", "xxx", null);
returnIt = new Intent(Intent.ACTION_PACKAGE_ADDED, installUri);
this.startActivity(returnIt);

23. Search applications :

Uri uri = Uri.parse("market://search?Q=pname:pkg_name");
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
this.startActivity(intent);
//Where pkg_name is the full package path for an application

24. Google Search Launch Web Browser :

Intent intent = new Intent(Intent.ACTION_WEB_SEARCH);
String term = "Android";
intent.putExtra(SearchManager.QUERY, term);
activity.startActivity(intent);

25. Send text using Intent (to messaging apps) :

Intent intent = new Intent(Intent.ACTION_WEB_SEARCH);
String msgBody = "This is message";
Intent intent = new Intent(android.content.Intent.ACTION_SEND);
intent.setType("text/plain");
intent.putExtra(android.content.Intent.EXTRA_SUBJECT,
"message subject");
intent.putExtra(android.content.Intent.EXTRA_TEXT, msgBody);
activity.startActivity(Intent.createChooser(intent, getResources().
getString(R.string.share_by_using)));

26. Create Shortcut on "Home Screen" :

Intent intent = new Intent(Intent.ACTION_WEB_SEARCH);
Intent toPrint = new Intent(this, anCreateshutcut.class);
Intent addShortcut = new Intent
("com.android.launcher.action.INSTALL_SHORTCUT");
addShortcut.putExtra(Intent.EXTRA_SHORTCUT_NAME, "Shutcutname");
addShortcut.putExtra(Intent.EXTRA_SHORTCUT_INTENT, toPrint);
addShortcut.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE,
Intent.ShortcutIconResource.fromContext(this, R.drawable.icon));
Manifest file:
<intent-filter>
<action android:name="android.intent.action.CREATE_SHORTCUT">
<category android:name="android.intent.category.LAUNCHER">
</category></action></intent-filter>
<uses-permission android:name="com.android.launcher.
permission.INSTALL_SHORTCUT">
</uses-permission>

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Android（java）学习笔记86：Android提供打开各种文件的API接口：setDataAndType

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