Intent 的用法

Intent的几种用法




Intent应该算是Android中特有的东西。你可以在Intent中指定程序要执行的动作（比如：view,edit,dial），以及程序执行到该动作时所需要的资料。都指定好后，只要调用startActivity()，Android系统会自动寻找最符合你指定要求的应用程序，并执行该程序。

下面列出几种Intent的用法
显示网页:
Uri uri = Uri.parse("http://www.google.com");
Intent it  = new Intent(Intent.ACTION_VIEW,uri);
startActivity(it);
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显示地图:
Uri uri = Uri.parse("geo:38.899533,-77.036476");
Intent it = new Intent(Intent.Action_VIEW,uri);
startActivity(it);
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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);
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拨打电话:
调用拨号程序
Uri uri = Uri.parse("tel:xxxxxx");
Intent it = new Intent(Intent.ACTION_DIAL, uri); 
startActivity(it); 
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Uri uri = Uri.parse("tel.xxxxxx");
Intent it =new Intent(Intent.ACTION_CALL,uri);
要使用这个必须在配置文件中加入<uses-permission id="android.permission.CALL_PHONE" />
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发送SMS/MMS
调用发送短信的程序
Intent it = new Intent(Intent.ACTION_VIEW);  
it.putExtra("sms_body", "The SMS text");  
it.setType("vnd.android-dir/mms-sms");  
startActivity(it); 
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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); 
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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);
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发送Email

Uri uri = Uri.parse("mailto:[e-mail]");
Intent it = new Intent(Intent.ACTION_SENDTO, uri);
startActivity(it);
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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")); 
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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"));  
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添加附件
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"));
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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);
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Uri uri = Uri.withAppendedPath(MediaStore.Audio.Media.INTERNAL_CONTENT_URI, "1");  
Intent it = new Intent(Intent.ACTION_VIEW, uri);  
startActivity(it); 
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Uninstall 程序
Uri uri = Uri.fromParts("package", strPackageName, null);  
Intent it = new Intent(Intent.ACTION_DELETE, uri);  
startActivity(it);
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market相关

再来一个market相关的：
market相关
//搜索应用
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 

//显示指定应用的详细页面（这个好像不支持了，找不到app_id）
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
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//发送附件
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"));
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不错，我再补充几个：
uninstall apk
Uri uninstallUri = Uri.fromParts("package", "xxx", null);

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

returnIt = new Intent(Intent.ACTION_PACKAGE_ADDED, installUri);
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play audio
Uri playUri = Uri.parse("file:///sdcard/download/everything.mp3");

returnIt = new Intent(Intent.ACTION_VIEW, playUri);
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