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Intent應(yīng)該算是Android中特有的東西。你可以在Intent中指定程序要執(zhí)行的動(dòng)作（比如：view,edit,dial），以及程序執(zhí)行到該動(dòng)作時(shí)所需要的資料。都指定好后，只要調(diào)用startActivity()，Android系統(tǒng)會(huì)自動(dòng)尋找最符合你指定要求的應(yīng)用程序，并執(zhí)行該程序。

下面列出幾種Intent的用法
顯示網(wǎng)頁:
 

• Uri uri = Uri.parse("http://www.google.com");
• Intent it  = new Intent(Intent.ACTION_VIEW,uri);
• startActivity(it);

顯示地圖:

• Uri uri = Uri.parse("geo:38.899533,-77.036476");
• Intent it = new Intent(Intent.Action_VIEW,uri);
• startActivity(it);

路徑規(guī)劃:

• 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(diào)用撥號(hào)程序

• 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(gè)必須在配置文件中加入<uses-permission id="android.permission.CALL_PHONE" />

發(fā)送SMS/MMS
調(diào)用發(fā)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);

發(fā)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);

發(fā)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);

發(fā)送Email

•  
• Uri uri = Uri.parse("mailto:xxx@abc.com");
• Intent it = new Intent(Intent.ACTION_SENDTO, uri);
• startActivity(it);

• Intent it = new Intent(Intent.ACTION_SEND);
• it.putExtra(Intent.EXTRA_EMAIL, "me@abc.com");
• 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={"me@abc.com"};
• String[] ccs={"you@abc.com"};
• 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

• 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

•  
• 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

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