Intent intent = new Intent();
intent.setAction(Intent.ACTION_WEB_SEARCH);
intent.putExtra(SearchManager.QUERY,"searchString")
startActivity(intent);

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

Uri uri = Uri.parse("geo:38.899533,-77.036476");
Intent it = newIntent(Intent.Action_VIEW,uri);
startActivity(it);

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

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

Intent it = newIntent(Intent.ACTION_VIEW);
it.putExtra("sms_body", "TheSMS text");
it.setType("vnd.android-dir/mms-sms");
startActivity(it);

Uri uri =Uri.parse("smsto:0800000123");
Intent it = newIntent(Intent.ACTION_SENDTO, uri);
it.putExtra("sms_body", "TheSMS text");
startActivity(it);

String body="this is sms demo";
Intent mmsintent = newIntent(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);

Uri uri =Uri.parse("content://media/external/images/media/23");
Intent it = newIntent(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 = newIntent(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);

Uri uri =Uri.parse("mailto:xxx@abc.com");
Intent it = newIntent(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, "Theemail 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, "Theemail body text");
it.putExtra(Intent.EXTRA_SUBJECT, "Theemail subject text");
it.setType("message/rfc822");
startActivity(Intent.createChooser(it,"Choose Email Client"));
Intent it = newIntent(Intent.ACTION_SEND);
it.putExtra(Intent.EXTRA_SUBJECT, "Theemail subject text");
it.putExtra(Intent.EXTRA_STREAM,"file:///sdcard/mysong.mp3");
sendIntent.setType("audio/mp3");
startActivity(Intent.createChooser(it,"Choose Email Client"));

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 = newIntent(Intent.ACTION_DELETE, uri);
startActivity(it);
12.install apk
Uri installUri = Uri.fromParts("package","xxx", null);
returnIt = newIntent(Intent.ACTION_PACKAGE_ADDED, installUri);
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.parse("file://" + filepath),"application/vnd.android.package-archive");
startActivity(intent);// 安装

<1> Intent intent = new Intent("android.media.action.STILL_IMAGE_CAMERA"); //调用照相机
startActivity(intent);
<2>Intent i = new Intent(Intent.ACTION_CAMERA_BUTTON, null);
this.sendBroadcast(i);
<3>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);

Intent i = new Intent();
i.setType("image/*");
i.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(i, 11);

Intent mi = new Intent(Media.RECORD_SOUND_ACTION);
startActivity(mi);

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, findthe ID
//by clicking on your application on Markethome
//page, and notice the ID from the addressbar

Uri uri =Uri.parse("market://details?id=<packagename>");

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 pathfor an application

<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);

Intent i = new Intent();
ComponentName cn = newComponentName("com.yellowbook.android2",
"com.yellowbook.android2.AndroidSearch");
i.setComponent(cn);
i.setAction("android.intent.action.MAIN");
startActivityForResult(i, RESULT_OK);

Intent it = newIntent(Intent.ACTION_INSERT_OR_EDIT);
it.setType("vnd.android.cursor.item/contact");
//it.setType(Contacts.CONTENT_ITEM_TYPE);
it.putExtra("name","myName");
it.putExtra(android.provider.Contacts.Intents.Insert.COMPANY,  "organization");
it.putExtra(android.provider.Contacts.Intents.Insert.EMAIL,"email");
it.putExtra(android.provider.Contacts.Intents.Insert.PHONE,"homePhone");
it.putExtra(android.provider.Contacts.Intents.Insert.SECONDARY_PHONE,
"mobilePhone");
it.putExtra(  android.provider.Contacts.Intents.Insert.TERTIARY_PHONE,
"workPhone");
it.putExtra(android.provider.Contacts.Intents.Insert.JOB_TITLE,"title");
startActivity(it);

Intent intent = newIntent(Intent.ACTION_INSERT_OR_EDIT);
intent.setType(People.CONTENT_ITEM_TYPE);
intent.putExtra(Contacts.Intents.Insert.NAME, "My Name");
intent.putExtra(Contacts.Intents.Insert.PHONE, "+1234567890");
intent.putExtra(Contacts.Intents.Insert.PHONE_TYPE,Contacts.PhonesColumns.TYPE_MOBILE);
intent.putExtra(Contacts.Intents.Insert.EMAIL, "com@com.com");
intent.putExtra(Contacts.Intents.Insert.EMAIL_TYPE,                    Contacts.ContactMethodsColumns.TYPE_WORK);
startActivity(intent);

android.intent.action.ALL_APPS
android.intent.action.ANSWER
android.intent.action.ATTACH_DATA
android.intent.action.BUG_REPORT
android.intent.action.CALL
android.intent.action.CALL_BUTTON
android.intent.action.CHOOSER
android.intent.action.CREATE_LIVE_FOLDER
android.intent.action.CREATE_SHORTCUT
android.intent.action.DELETE
android.intent.action.DIAL
android.intent.action.EDIT
android.intent.action.GET_CONTENT
android.intent.action.INSERT
android.intent.action.INSERT_OR_EDIT
android.intent.action.MAIN
android.intent.action.MEDIA_SEARCH
android.intent.action.PICK
android.intent.action.PICK_ACTIVITY
android.intent.action.RINGTONE_PICKER
android.intent.action.RUN
android.intent.action.SEARCH
android.intent.action.SEARCH_LONG_PRESS
android.intent.action.SEND
android.intent.action.SENDTO
android.intent.action.SET_WALLPAPER
android.intent.action.SYNC
android.intent.action.SYSTEM_TUTORIAL
android.intent.action.VIEW
android.intent.action.VOICE_COMMAND
android.intent.action.WEB_SEARCH
android.net.wifi.PICK_WIFI_NETWORK
android.settings.AIRPLANE_MODE_SETTINGS
android.settings.APN_SETTINGS
android.settings.APPLICATION_DEVELOPMENT_SETTINGS
android.settings.APPLICATION_SETTINGS
android.settings.BLUETOOTH_SETTINGS
android.settings.DATA_ROAMING_SETTINGS
android.settings.DATE_SETTINGS
android.settings.DISPLAY_SETTINGS
android.settings.INPUT_METHOD_SETTINGS
android.settings.INTERNAL_STORAGE_SETTINGS
android.settings.LOCALE_SETTINGS
android.settings.LOCATION_SOURCE_SETTINGS
android.settings.MANAGE_APPLICATIONS_SETTINGS
android.settings.MEMORY_CARD_SETTINGS
android.settings.NETWORK_OPERATOR_SETTINGS
android.settings.QUICK_LAUNCH_SETTINGS
android.settings.SECURITY_SETTINGS
android.settings.SETTINGS
android.settings.SOUND_SETTINGS
android.settings.SYNC_SETTINGS
android.settings.USER_DICTIONARY_SETTINGS
android.settings.WIFI_IP_SETTINGS
android.settings.WIFI_SETTINGS
android.settings.WIRELESS_SETTINGS