The system provides common Activity programming and activity programming.

The system provides common Activity programming and activity programming.

Common Activity programming provided by the system

// 1. call the phone number // call the mobile customer service at 10086 Uri uri = Uri. parse ("tel: 10086"); Intent intent = new Intent (Intent. ACTION_DIAL, uri); startActivity (intent); // 2. send a text message // send a text message Uri with the content "Hello" to 10086 uri = Uri. parse ("Maid: 10086"); Intent intent = new Intent (Intent. ACTION_SENDTO, uri); intent. putExtra ("sms_body", "Hello"); startActivity (intent); // 3. send MMS (equivalent to sending an SMS with attachments) Intent intent = new Intent (Intent. ACTION_SEND); intent. putExtra ("sms_body", "Hello"); Uri uri = Uri. parse ("content: // media/external/images/media/23"); intent. putExtra (Intent. EXTRA_STREAM, uri); intent. setType ("image/png"); startActivity (intent); // 4. open the browser: // open the baidu homepage Uri uri = Uri. parse (" https://www.baidu.com "); Intent intent = new Intent (Intent. ACTION_VIEW, uri); startActivity (intent); // 5. send an email: (castrated with Google services !!!!) // Send an email Uri uri = Uri to the someone@domain.com. parse ("mailto: someone@domain.com"); Intent intent = new Intent (Intent. ACTION_SENDTO, uri); startActivity (intent); // Intent intent = new Intent (Intent. ACTION_SEND); intent. putExtra (Intent. EXTRA_EMAIL, "someone@domain.com"); intent. putExtra (Intent. EXTRA_SUBJECT, "Subject"); intent. putExtra (Intent. EXTRA_TEXT, "Hello"); intent. setType ("text/plain"); startActivity (intent); // send Intent intent = new Intent (Intent. ACTION_SEND); String [] tos = {"1@abc.com", "2@abc.com"}; // recipient String [] ccs = {"3@abc.com", "4@abc.com "}; // CC String [] bccs = {"5@abc.com", "6@abc.com"}; // BCC intent. putExtra (Intent. EXTRA_EMAIL, tos); intent. putExtra (Intent. EXTRA_CC, ccs); intent. putExtra (Intent. EXTRA_BCC, bccs); intent. putExtra (Intent. EXTRA_SUBJECT, "Subject"); intent. putExtra (Intent. EXTRA_TEXT, "Hello"); intent. setType ("message/rfc822"); startActivity (intent); // 6. show map: // open Google map China Beijing location (north latitude 39.9, east longitude 116.3) Uri uri = Uri. parse ("geo: 39.9, 116.3"); Intent intent = new Intent (Intent. ACTION_VIEW, uri); startActivity (intent); // 7. path Planning // Path Planning: from a certain place in Beijing (latitude 39.9, longitude 116.3) to a certain place in Shanghai (latitude 31.2, longitude 121.4) Uri uri Uri = Uri. parse (" https://maps.google.com/maps?f=d&saddr=39.9 116.3 & daddr = 31.2 121.4 "); Intent intent = new Intent (Intent. ACTION_VIEW, uri); startActivity (intent); // 8. multimedia playback: Intent intent = new Intent (Intent. ACTION_VIEW); Uri uri = Uri. parse (" file:///sdcard/foo.mp3 "); Intent. setDataAndType (uri, "audio/mp3"); startActivity (intent); // obtain all audio files under the SD card, and then play the first video =-= Uri uri = Uri. withAppendedPath (MediaStore. audio. media. INTERNAL_CONTENT_URI, "1"); Intent intent = new Intent (Intent. ACTION_VIEW, uri); startActivity (intent); // 9. enable the camera to take a photo: // enable the camera program Intent intent = new Intent (MediaStore. ACTION_IMAGE_CAPTURE); startActivityForResult (intent, 0); // Bundle extras = intent. getExtras (); Bitmap bitmap = (Bitmap) extras. get ("data"); // another method: // call the System camera application and store the captured image Intent intent = new Intent (MediaStore. ACTION_IMAGE_CAPTURE); time = Calendar. getInstance (). getTimeInMillis (); intent. putExtra (MediaStore. EXTRA_OUTPUT, Uri. fromFile (new File (Environment. getExternalStorageDirectory (). getAbsolutePath () + "/tucue", time + ". jpg "); startActivityForResult (intent, ACTIVITY_GET_CAMERA_IMAGE); // 10. get and cut the image // get and cut the image Intent intent = new Intent (Intent. ACTION_GET_CONTENT); intent. setType ("image/*"); intent. putExtra ("crop", "true"); // enable intent cut. putExtra ("aspectX", 1); // the aspect ratio of the cut is 1: 2intent. putExtra ("aspectY", 2); intent. putExtra ("outputX", 20); // Save the width and height of the image intent. putExtra ("outputY", 40); intent. putExtra ("output", Uri. fromFile (new File ("/mnt/sdcard/temp"); // Save the path intent. putExtra ("outputFormat", "JPEG"); // return format startActivityForResult (intent, 0); // cut the Intent intent = new Intent ("com. android. camera. action. CROP "); intent. setClassName ("com. android. camera "," com. android. camera. cropImage "); intent. setData (Uri. fromFile (new File ("/mnt/sdcard/temp"); intent. putExtra ("outputX", 1); // the aspect ratio of the cut is 1: 2intent. putExtra ("outputY", 2); intent. putExtra ("aspectX", 20); // Save the width and height of the image intent. putExtra ("aspectY", 40); intent. putExtra ("scale", true); intent. putExtra ("noFaceDetection", true); intent. putExtra ("output", Uri. parse (" file:///mnt/sdcard/temp "); StartActivityForResult (intent, 0); // 11. open Google Market // Open Google Market to go to the detailed page of the program Uri uri = Uri. parse ("market: // details? Id = "+" com. demo. app "); Intent intent = new Intent (Intent. ACTION_VIEW, uri); startActivity (intent); // 12. go to the mobile phone settings page: // enter the wireless network settings page (you can refer to other settings) Intent intent = new Intent (android. provider. settings. ACTION_WIRELESS_SETTINGS); startActivityForResult (intent, 0); // 13. install apk: Uri installUri = Uri. fromParts ("package", "xxx", null); returnIt = new Intent (Intent. ACTION_PACKAGE_ADDED, installUri); // 14. uninstall apk: Uri uri = Uri. fromParts ("package", strPackageName, null); Intent it = new Intent (Intent. ACTION_DELETE, uri); startActivity (it); // 15. send attachment: Intent it = new Intent (Intent. ACTION_SEND); it. putExtra (Intent. EXTRA_SUBJECT, "The email subject text"); it. putExtra (Intent. EXTRA_STREAM ," file:///sdcard/eoe.mp3 "); SendIntent. setType ("audio/mp3"); startActivity (Intent. createChooser (it, "Choose Email Client"); // 16. enter the contact page: Intent intent = new Intent (); intent. setAction (Intent. ACTION_VIEW); intent. setData (People. CONTENT_URI); startActivity (intent); // 17. view the specified contact: Uri personUri = ContentUris. withAppendedId (People. CONTENT_URI, info. id); // info. id contact IDIntent intent = new Intent (); intent. setAction (Intent. ACTION_VIEW); intent. setData (personUri); startActivity (intent );