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。

2setType
  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: 

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1. Intent intent = new Intent("android.intent.action.VIEW");  
2. intent.addCategory("android.intent.category.DEFAULT");  
3. intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK);  
4. Uri uri = Uri.fromFile(new  
5. File("/mnt/sdcard/images/001041580.jpg"));  
6. intent.setDataAndType (uri, "image/*");  
7. this.startActivity(intent);  

2. Intent to open a PDF file:

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1. Intent intent = new Intent("android.intent.action.VIEW");  
2. intent.addCategory("android.intent.category.DEFAULT");  
3. intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK);  
4. Uri uri = Uri.fromFile(new  
5. File("file:///android_asset/helphelp.pdf"));  
6. intent.setDataAndType (uri, "application/pdf");  
7. this.startActivity(intent);  

3. Intent to open a text file:

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1.   

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1. Intent intent = new Intent("android.intent.action.VIEW");  
2. intent.addCategory("android.intent.category.DEFAULT");  
3. intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK);  
4. if (paramBoolean)  
5. {  
6. Uri uri1 = Uri.parse (param);  
7. intent.setDataAndType (URI1, "text/plain");  
8. }  
9. else  
10. {  
11. Uri uri = Uri.fromFile(new File("/mnt/sdcard/hello.txt"));  
12. intent.setDataAndType (URI2, "text/plain");  
13. }  
14. this.startActivity(intent);  

4. Intent to open the audio file:

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1. Intent intent = new Intent("android.intent.action.VIEW");  
2. intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);  
3. intent.putExtra ("oneshot", 0);  
4. intent.putExtra ("configchange", 0);  
5. Uri uri = Uri.fromFile(new File("/mnt/sdcard/ren.mp3"));  
6. intent.setDataAndType (uri, "audio/*");  
7. this.startActivity(intent);  

5. Intent to open the video file:

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1. Intent intent = new Intent("android.intent.action.VIEW");  
2. intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);  
3. intent.putExtra ("oneshot", 0);  
4. intent.putExtra ("configchange", 0);  
5. Uri uri = Uri.fromFile(new File("/mnt/sdcard/ice.avi"));  
6. intent.setDataAndType (uri, "video/*");  
7. this.startActivity(intent);  

6. Intent to open the CHM file:

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1. Intent intent = new Intent("android.intent.action.VIEW");  
2. intent.addCategory("android.intent.category.DEFAULT");  
3. intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK);  
4. Uri uri = Uri.fromFile(new File("/mnt/sdcard/ice.chm"));  
5. intent.setDataAndType (uri, "application / x-chm");  
6. this.startActivity(intent);  

7. Intent to open a Word document:

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1. Intent intent = new Intent("android.intent.action.VIEW");  
2. intent.addCategory("android.intent.category.DEFAULT");  
3. intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK);  
4. Uri uri = Uri.fromFile(new File("/system/etc/help.doc"));  
5. intent.setDataAndType(uri, "application/msword");  
6. this.startActivity(intent);  

8. Android Excel intent:

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1. Intent intent = new Intent("android.intent.action.VIEW");  
2. intent.addCategory("android.intent.category.DEFAULT");  
3. intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK);  
4. Uri uri = Uri.fromFile(new File("/mnt/sdcard/Book1.xls"));  
5. intent.setDataAndType (uri, "application/vnd.ms-excel");  
6. this.startActivity(intent);  

9. Intent to open the PPT file:

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1. Intent intent = new Intent("android.intent.action.VIEW");  
2. intent.addCategory("android.intent.category.DEFAULT");  
3. intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK);  
4. Uri uri = Uri.fromFile(new  
5. File("/mnt/sdcard/download/Android_PPT.ppt"));  
6. intent.setDataAndType (uri, "application/vnd.ms-powerpoint");  
7. this.startActivity(intent);  

10. Display Html page:

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1. Uri uri = Uri.parse ("http://www.google.com");   
2. Intent intent = new Intent (Intent.ACTION_VIEW, uri);   
3. this.startActivity(intent);  

11. Show map:

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1. Uri uri = Uri.parse ("geo: 38.899533, -77.036476");   
2. Intent intent = new Intent (Intent.Action_VIEW, uri);   
3. this.startActivity(intent);  

12. Call the dialer:

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1. Uri uri = Uri.parse ("tel: xxxxxx");   
2. Intent intent = new Intent (Intent.ACTION_DIAL, uri);   
3. this.startActivity(intent);  

13. Call :

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1. Uri uri = Uri.parse ("tel: xxxxxx");   
2. Intent it = new Intent (Intent.ACTION_CALL, uri);    
3. this.startActivity(intent);  
4. /*permission:  
5. <uses-permission id="android.permission.CALL_PHONE"> 
6. </uses-permission> */  

14. Call to send text messages of the program :

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1. Intent intent = new Intent (Intent.ACTION_VIEW);  
2. intent.putExtra("sms_body", "The SMS text");  
3. intent.setType("vnd.android-dir/mms-sms");  
4. this.startActivity(intent);  

15. Send SMS :

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1. Uri uri = Uri.parse("smsto:0800000123");  
2. Intent intent = new Intent(Intent.ACTION_SENDTO, uri);  
3. intent.putExtra("sms_body", "The SMS text");  
4. this.startActivity(intent);  

16. Send MMS :

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

17. Send an Email :

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1. Uri uri = Uri.parse ("mailto: [e-mail]");   
2. Intent intent = new Intent (Intent.ACTION_SENDTO, uri);    
3. this.startActivity(intent);  

18. Send an Email with body :

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1. Intent intent = new Intent(Intent.ACTION_SEND);  
2. intent.putExtra(Intent.EXTRA_EMAIL,"[e-mail]");  
3. intent.putExtra(Intent.EXTRA_TEXT,"The email body text");  
4. intent.setType ("text/plain");  
5. this.startActivity(  
6. Intent.createChooser(intent, "Choose Email Client"));    

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

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1. Intent intent = new Intent(Intent.ACTION_SEND);  
2. String [] tos ={"[e-mail]"};  
3. String [] ccs ={"[e-mail]"};  
4. intent.putExtra(Intent.EXTRA_EMAIL, tos);  
5. intent.putExtra(Intent.EXTRA_CC, ccs);  
6. intent.putExtra(Intent.EXTRA_TEXT, "The email body text");  
7. intent.putExtra(Intent.EXTRA_SUBJECT, "The email subject text");  
8. intent.setType("message/rfc822");  
9. this.startActivity(  
10. Intent.createChooser(intent, "Choose Email Client"));    

20. Send an Email with attachments :

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

21. Uninstall the program :

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

22. Install the apk :

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

23. Search applications :

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

24. Google Search Launch Web Browser :

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

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

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1. Intent intent = new Intent(Intent.ACTION_WEB_SEARCH);  
2. String msgBody = "This is message";  
3. Intent intent = new Intent(android.content.Intent.ACTION_SEND);  
4. intent.setType("text/plain");  
5. intent.putExtra(android.content.Intent.EXTRA_SUBJECT,   
6. "message subject");  
7. intent.putExtra(android.content.Intent.EXTRA_TEXT, msgBody);  
8. activity.startActivity(Intent.createChooser(intent, getResources().  
9. getString(R.string.share_by_using)));  

26. Create Shortcut on "Home Screen" :

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1. Intent intent = new Intent(Intent.ACTION_WEB_SEARCH);  
2. Intent toPrint = new Intent(this, anCreateshutcut.class);    
3. Intent addShortcut = new Intent  
4. ("com.android.launcher.action.INSTALL_SHORTCUT");    
5. addShortcut.putExtra(Intent.EXTRA_SHORTCUT_NAME, "Shutcutname");    
6. addShortcut.putExtra(Intent.EXTRA_SHORTCUT_INTENT, toPrint);    
7. addShortcut.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE,   
8. Intent.ShortcutIconResource.fromContext(this, R.drawable.icon));  
9.    
10. Manifest file:  
11. <intent-filter>    
12.   <action android:name="android.intent.action.CREATE_SHORTCUT">    
13.   <category android:name="android.intent.category.LAUNCHER">    
14. </category></action></intent-filter>  
15. <uses-permission android:name="com.android.launcher.  
16. permission.INSTALL_SHORTCUT">  
17. </uses-permission>