Intent用法

Intent的中文意思是“意图，目的”的意思，可以理解为不同组件之间通信的“媒介”或者“信使”。

目标组件一般要通过Intent来声明自己的条件，一般通过组件中的<intent-filter>元素来过滤。

Intent在由以下几个部分组成：动作（action），数据（data），分类（Category），类型（Type），组件（Component），和扩展信息（Extra）。

Intent在寻找目标组件的时候有两种方法：第一，通过组件名称直接指定；第二，通过Intent Filter过滤指定

Intent启动不同组件的方法

组件名称方法名称Activity

startActivity()

startActivityForResult()

Service

startService()

bindService()

Broadcasts

sendBroadcast()

sendOrderedBroadcast()

sendStickyBroadcast()

android 中intent是经常要用到的。不管是页面牵转，还是传递数据，或是调用外部程序，系统功能都要用到intent，下面是一些常用intent示例：

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:[e-mail]"); Intent it = new Intent(Intent.ACTION_SENDTO, uri); startActivity(it); Intent it = new Intent(Intent.ACTION_SEND);    it.putExtra(Intent.EXTRA_EMAIL, "[e-mail]");    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={"[e-mail]"};      String[] ccs={"[e-mail]"};      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.卸载APK

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

12.安装APK

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

13. 打开照相机
第一种

Intent i = new Intent(Intent.ACTION_CAMERA_BUTTON, null); this.sendBroadcast(i); 

第二种

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); 

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); 

18打开联系人列表
第一种

 Intent i = new Intent(); i.setAction(Intent.ACTION_GET_CONTENT); i.setType("vnd.android.cursor.item/phone"); startActivityForResult(i, REQUEST_TEXT); 

第二种

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);

20.调用系统编辑添加联系人（高版本SDK有效）：

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);

21.调用系统编辑添加联系人（全有效）：

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, "[phone]");intent.putExtra(Contacts.Intents.Insert.PHONE_TYPE,Contacts.PhonesColumns.TYPE_MOBILE);intent.putExtra(Contacts.Intents.Insert.EMAIL, "[e-mail]");intent.putExtra(Contacts.Intents.Insert.EMAIL_TYPE,Contacts.ContactMethodsColumns.TYPE_WORK);startActivity(intent);

这些都可以调用系统的APK,有些有界面，有些莫有实际效果要自己试的哦！