Android Intent的幾種用法詳細解析

Intent應該算是Android中特有的東西。你可以在Intent中指定程序要執行的動作（比如：view,edit,dial），以及程序執行到該動作時所需要的資料。都指定好後，只要調用startActivity()，Android系統會自動尋找最符合你指定要求的應用程序，並執行該程序。

下面列出幾種Intent的用法
顯示網頁:
復制代碼 代碼如下:
Uri uri = Uri.parse("http://www.google.com");
Intent it  = new Intent(Intent.ACTION_VIEW,uri);
startActivity(it);

顯示地圖:
復制代碼 代碼如下:
Uri uri = Uri.parse("geo:38.899533,-77.036476");
Intent it = new Intent(Intent.Action_VIEW,uri);
startActivity(it);

路徑規劃:
復制代碼 代碼如下:
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);

撥打電話:
調用撥號程序
復制代碼 代碼如下:
Uri uri = Uri.parse("tel:xxxxxx");
Intent it = new Intent(Intent.ACTION_DIAL, uri); 
startActivity(it); 
Uri uri = Uri.parse("tel.xxxxxx");
Intent it =new Intent(Intent.ACTION_CALL,uri);

要使用這個必須在配置文件中加入<uses-permission id="android.permission.CALL_PHONE" />
發送SMS/MMS
調用發送短信的程序
復制代碼 代碼如下:
Intent it = new Intent(Intent.ACTION_VIEW);  
it.putExtra("sms_body", "The SMS text");  
it.setType("vnd.android-dir/mms-sms");  
startActivity(it); 

發送短信
復制代碼 代碼如下:
Uri uri = Uri.parse("smsto:0800000123");  
Intent it = new Intent(Intent.ACTION_SENDTO, uri);  
it.putExtra("sms_body", "The SMS text");  
startActivity(it); 

發送彩信
復制代碼 代碼如下:
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);

發送Email
復制代碼 代碼如下:
Uri uri = Uri.parse("mailto:[email protected]");
Intent it = new Intent(Intent.ACTION_SENDTO, uri);
startActivity(it);
Intent it = new Intent(Intent.ACTION_SEND);  
it.putExtra(Intent.EXTRA_EMAIL, "[email protected]");  
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={"[email protected]"};    
String[] ccs={"[email protected]"};    
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")); 

添加附件
復制代碼 代碼如下:
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"));

播放多媒體
復制代碼 代碼如下: 
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); 

Uninstall 程序
復制代碼 代碼如下:
Uri uri = Uri.fromParts("package", strPackageName, null);  
Intent it = new Intent(Intent.ACTION_DELETE, uri);  
startActivity(it);