intent.setDataAndType()

Android中提供了Intent机制来协助应用间的交互与通讯，或者采用更准确的说法是，Intent不仅可用于应用程序之间，也可用于应用程序内部的Activity/Service之间的交互。利用Intent所实现的软件复用的粒度是Activity/Service，比函数复用更高一些，另外耦合也更为松散。
 
1 settype
  使用该函数表示要查找文件的mime类型（如*/*），这个和组件在manifest里定义的相对应，但在源代码里：

public  Intent setData(Uri data) { 
        mData = data; 
        mType = null ; 
        return   this ; 
    } 

会将type设为null。

2 setType
  该函数的参数是uri，所以要将数据通过该函数传递时，记得要把数据转化为uri，如Uri.fromFile(new File("/mnt/sdcard/"))。
该函数源代码
public  Intent setType(String type) { 
        mData = null ; 
        mType = type; 
        return   this ; 
    } 
 
3 所以要同时设置data和type的话只能用函数setDataAndType了

public  Intent setDataAndType(Uri data, String type) { 
        mData = data; 
        mType = type; 
        return   this ; 
    } 

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:

  */

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: [email protected]");
 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,"[email protected]");
 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 ={"[email protected]"};
 String [] ccs ={"[email protected]"};
 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:

   "android.intent.action.CREATE_SHORTCUT">
   "android.intent.category.LAUNCHER">


 permission.INSTALL_SHORTCUT">