Intent:
| java.lang.Object | |
| ↳ | android.content.Intent |
| Known Direct Subclasses |
原意:
An intent is an abstract description of an operation to be performed. It can be used with startActivity to launch an Activity, broadcastIntent to send it to any interested BroadcastReceiver components, and startService(Intent) or bindService(Intent, ServiceConnection, int) to communicate with a background Service.
译文:
意图是一个操作的抽象描述要执行的。它可用于发动了startActivity活动,broadcastIntent将其发送到任何有兴趣的BroadcastReceiver组件和startService(意图)或bindService(意图,ServiceConnection,int)以沟通,后台服务。
示例展示:
演示效果:



以下是常用到的Intent的URI
一、打开一个网页,类别是Intent.ACTION_VIEW
Uri uri = Uri.parse(“http://blog.3gstdy.com/”);
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
二、打开地图并定位到一个点
Uri uri = Uri.parse(“geo:52.76,-79.0342″);
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
三、打开拨号界面 ,类型是Intent.ACTION_DIAL
Uri uri = Uri.parse(“tel:10086″);
Intent intent = new Intent(Intent.ACTION_DIAL, uri);
四、直接拨打电话,与三不同的是,这个直接拨打电话,而不是打开拨号界面
Uri uri = Uri.parse(“tel:10086″);
Intent intent = new Intent(Intent.ACTION_CALL, uri);
五、卸载一个应用,Intent的类别是Intent.ACTION_DELETE
Uri uri = Uri.fromParts(“package”, “xxx”, null);
Intent intent = new Intent(Intent.ACTION_DELETE, uri);
六、安装应用程序,Intent的类别是Intent.ACTION_PACKAGE_ADDED
Uri uri = Uri.fromParts(“package”, “xxx”, null);
Intent intent = new Intent(Intent.ACTION_PACKAGE_ADDED, uri);
七、播放音频文件
Uri uri = Uri.parse(“file:///sdcard/download/everything.mp3″);
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
intent.setType(“audio/mp3″);
八、打开发邮件界面
Uri uri= Uri.parse(“mailto:admin@3gstdy.com”);
Intent intent = new Intent(Intent.ACTION_SENDTO, uri);
九、发邮件,与八不同这里是将邮件发送出去,
Intent intent = new Intent(Intent.ACTION_SEND);
String[] tos = { “admin@3gstdy.com” };
String[] ccs = { “webmaster@3gstdy.com” };
intent.putExtra(Intent.EXTRA_EMAIL, tos);
intent.putExtra(Intent.EXTRA_CC, ccs);
intent.putExtra(Intent.EXTRA_TEXT, “I come from http://blog.3gstdy.com”);
intent.putExtra(Intent.EXTRA_SUBJECT, “http://blog.3gstdy.com”);intent.setType(“message/rfc882″);
Intent.createChooser(intent, “Choose Email Client”);
//发送带附件的邮件
Intent intent = new Intent(Intent.ACTION_SEND);
intent.putExtra(Intent.EXTRA_SUBJECT, “The email subject text”);
intent.putExtra(Intent.EXTRA_STREAM, “file:///sdcard/mysong.mp3″);
intent.setType(“audio/mp3″);
startActivity(Intent.createChooser(intent, “Choose Email Client”));
十、发短信
Uri uri= Uri.parse(“tel:10086″);
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
intent.putExtra(“sms_body”, “I come from http://blog.3gstdy.com”);
intent.setType(“vnd.Android-dir/mms-sms”);
十一、直接发邮件
Uri uri= Uri.parse(“smsto://100861″);
Intent intent = new Intent(Intent.ACTION_SENDTO, uri);
intent.putExtra(“sms_body”, “3g android http://blog.3gstdy.com”);
十二、发彩信
Uri uri= Uri.parse(“content://media/external/images/media/23″);
Intent intent = new Intent(Intent.ACTION_SEND);
intent.putExtra(“sms_body”, “3g android http://blog.3gstdy.com”);
intent.putExtra(Intent.EXTRA_STREAM, uri);
intent.setType(“image/png”);
十三、# Market 相关
1 //寻找某个应用
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
2 //显示某个应用的相关信息
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
十四、路径规划
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);
本文详细介绍了 Android 中 Intent 的使用方法,包括如何启动 Activity、BroadcastReceiver 和 Service,提供了多个示例,如打开网页、发送短信、拨打电话等。
2394

被折叠的 条评论
为什么被折叠?



