Uri uri = Uri.parse(""); 
Intent it = new Intent(Intent.ACTION_VIEW,uri); 
startActivity(it); 

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

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

Uri uri = Uri.parse("tel:10086"); 
Intent it = new Intent(Intent.ACTION_DIAL, uri);  
startActivity(it); 

Uri uri = Uri.parse("tel.10086"); 
Intent it =new Intent(Intent.ACTION_CALL,uri); 

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

Uri uri = Uri.parse("smsto:10086");  
Intent it = new Intent(Intent.ACTION_SENDTO, uri);  
it.putExtra("sms_body", "cwj");  
startActivity(it);  

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);  

Uri uri = Uri.parse("mailto:android123@163.com"); 
Intent it = new Intent(Intent.ACTION_SENDTO, uri); 
startActivity(it); 

Intent it = new Intent(Intent.ACTION_SEND);  
it.putExtra(Intent.EXTRA_EMAIL, android123@163.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_VIEW); 
Uri uri = Uri.parse("file:///sdcard/cwj.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);  

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

Uri uninstallUri = Uri.fromParts("package", "xxx", null); 
returnIt = new Intent(Intent.ACTION_DELETE, uninstallUri); 

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

Uri playUri = Uri.parse("file:///sdcard/download/sth.mp3"); 
returnIt = new Intent(Intent.ACTION_VIEW, playUri); 

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

Uri uri = Uri.parse("market://search?q=pname:pkg_name");  
Intent it = new Intent(Intent.ACTION_VIEW, uri);  
startActivity(it);  

Uri uri = Uri.parse("market://details?id=app_id");  
Intent it = new Intent(Intent.ACTION_VIEW, uri);  
startActivity(it);  

Intent intent = new Intent(); 
intent.setAction(Intent.ACTION_WEB_SEARCH); 
intent.putExtra(SearchManager.QUERY,"android123") 
startActivity(intent);