1.从google搜索内容  
Intent intent = new Intent();  
intent.setAction(Intent.ACTION_WEB_SEARCH);  
intent.putExtra(SearchManager.QUERY,"searchString")  
startActivity(intent);

2.浏览网页  
Uri uri = Uri.parse("http://www.google.com");  
Intent it = new Intent(Intent.ACTION_VIEW,uri);  
startActivity(it);

3.显示地图  
Uri uri = Uri.parse("geo:38.899533,-77.036476");  
Intent it = new Intent(Intent.Action_VIEW,uri);  
startActivity(it);

4.路径规划  
Uri uri = Uri.parse("http://maps.google.com/maps?f=dsaddr=startLat%20startLng&daddr=endLat%20endLng&hl=en");  
Intent it = new Intent(Intent.ACTION_VIEW,URI);  
startActivity(it);

5.拨打电话  
Uri uri = Uri.parse("tel:xxxxxx");  
Intent it = new Intent(Intent.ACTION_DIAL, uri);  
startActivity(it);

6.调用发短信的程序  
Intent it = new Intent(Intent.ACTION_VIEW);  
it.putExtra("sms_body", "The SMS text");  
it.setType("vnd.android-dir/mms-sms");  
startActivity(it);

7.发送短信  
Uri uri = Uri.parse("smsto:0800000123");  
Intent it = new Intent(Intent.ACTION_SENDTO, uri);  
it.putExtra("sms_body", "The SMS text");  
startActivity(it);  
String body="this is sms demo";  
Intent mmsintent = new Intent(Intent.ACTION_SENDTO, Uri.fromParts("smsto", number, null));  
mmsintent.putExtra(Messaging.KEY_ACTION_SENDTO_MESSAGE_BODY, body);  
mmsintent.putExtra(Messaging.KEY_ACTION_SENDTO_COMPOSE_MODE, true);  
mmsintent.putExtra(Messaging.KEY_ACTION_SENDTO_EXIT_ON_SENT, true);  
startActivity(mmsintent);

8.发送彩信  
Uri uri = Uri.parse("content://media/external/images/media/23");  
Intent it = new Intent(Intent.ACTION_SEND);  
it.putExtra("sms_body", "some text");  
it.putExtra(Intent.EXTRA_STREAM, uri);  
it.setType("image/png");  
startActivity(it);  
StringBuilder sb = new StringBuilder();  
sb.append("file://");  
sb.append(fd.getAbsoluteFile());  
Intent intent = new Intent(Intent.ACTION_SENDTO, Uri.fromParts("mmsto", number, null));  
// Below extra datas are all optional.  
intent.putExtra(Messaging.KEY_ACTION_SENDTO_MESSAGE_SUBJECT, subject);  
intent.putExtra(Messaging.KEY_ACTION_SENDTO_MESSAGE_BODY, body);  
intent.putExtra(Messaging.KEY_ACTION_SENDTO_CONTENT_URI, sb.toString());  
intent.putExtra(Messaging.KEY_ACTION_SENDTO_COMPOSE_MODE, composeMode);  
intent.putExtra(Messaging.KEY_ACTION_SENDTO_EXIT_ON_SENT, exitOnSent);  
startActivity(intent);

9.发送Email  
Uri uri = Uri.parse("mailto:xxx@abc.com");  
Intent it = new Intent(Intent.ACTION_SENDTO, uri);  
startActivity(it);  
Intent it = new Intent(Intent.ACTION_SEND);  
it.putExtra(Intent.EXTRA_EMAIL, "me@abc.com");  
it.putExtra(Intent.EXTRA_TEXT, "The email body text");  
it.setType("text/plain");  
startActivity(Intent.createChooser(it, "Choose Email Client"));  
Intent it=new Intent(Intent.ACTION_SEND);  
String[] tos={"me@abc.com"};  
String[] ccs={"you@abc.com"};  
it.putExtra(Intent.EXTRA_EMAIL, tos);  
it.putExtra(Intent.EXTRA_CC, ccs);  
it.putExtra(Intent.EXTRA_TEXT, "The email body text");  
it.putExtra(Intent.EXTRA_SUBJECT, "The email subject text");  
it.setType("message/rfc822");  
startActivity(Intent.createChooser(it, "Choose Email Client"));

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

10.播放多媒体  
Intent it = new Intent(Intent.ACTION_VIEW);  
Uri uri = Uri.parse("file:///sdcard/song.mp3");  
it.setDataAndType(uri, "audio/mp3");  
startActivity(it);  
Uri uri = Uri.withAppendedPath(MediaStore.Audio.Media.INTERNAL_CONTENT_URI, "1");  
Intent it = new Intent(Intent.ACTION_VIEW, uri);  
startActivity(it);

11.uninstall apk  
Uri uri = Uri.fromParts("package", strPackageName, null);  
Intent it = new Intent(Intent.ACTION_DELETE, uri);  
startActivity(it);

12.install apk  
Uri installUri = Uri.fromParts("package", "xxx", null);  
returnIt = new Intent(Intent.ACTION_PACKAGE_ADDED, installUri);

13. 打开照相机  
<1>Intent i = new Intent(Intent.ACTION_CAMERA_BUTTON, null);  
this.sendBroadcast(i);  
<2>long dateTaken = System.currentTimeMillis();  
String name = createName(dateTaken) + ".jpg";  
fileName = folder + name;  
ContentValues values = new ContentValues();  
values.put(Images.Media.TITLE, fileName);  
values.put("_data", fileName);  
values.put(Images.Media.PICASA_ID, fileName);  
values.put(Images.Media.DISPLAY_NAME, fileName);  
values.put(Images.Media.DESCRIPTION, fileName);  
values.put(Images.ImageColumns.BUCKET_DISPLAY_NAME, fileName);  
Uri photoUri = getContentResolver().insert(  
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);

Intent inttPhoto = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);  
inttPhoto.putExtra(MediaStore.EXTRA_OUTPUT, photoUri);  
startActivityForResult(inttPhoto, 10);

14.从gallery选取图片  
Intent i = new Intent();  
i.setType("image/*");  
i.setAction(Intent.ACTION_GET_CONTENT);  
startActivityForResult(i, 11);

15. 打开录音机  
Intent mi = new Intent(Media.RECORD_SOUND_ACTION);  
startActivity(mi);

16.显示应用详细列表  
Uri uri = Uri.parse("market://details?id=app_id");  
Intent it = new Intent(Intent.ACTION_VIEW, uri);  
startActivity(it);  
//where app_id is the application ID, find the ID  
//by clicking on your application on Market home  
//page, and notice the ID from the address bar

刚才找app id未果，结果发现用package name也可以  
Uri uri = Uri.parse("market://details?id=<packagename>");  
这个简单多了

17.寻找应用  
Uri uri = Uri.parse("market://search?q=pname:pkg_name");  
Intent it = new Intent(Intent.ACTION_VIEW, uri);  
startActivity(it);  
//where pkg_name is the full package path for an application

18.打开联系人列表  
<1>  
Intent i = new Intent();  
i.setAction(Intent.ACTION_GET_CONTENT);  
i.setType("vnd.android.cursor.item/phone");  
startActivityForResult(i, REQUEST_TEXT);

<2>  
Uri uri = Uri.parse("content://contacts/people");  
Intent it = new Intent(Intent.ACTION_PICK, uri);  
startActivityForResult(it, REQUEST_TEXT);

19.打开另一程序  
Intent i = new Intent();  
ComponentName cn = new ComponentName("com.yellowbook.android2",  
"com.yellowbook.android2.AndroidSearch");  
i.setComponent(cn);  
i.setAction("android.intent.action.MAIN");  
startActivityForResult(i, RESULT_OK);