如果是從BroadcastReceiver 啟動一個新的Activity , 不要忘記i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);public class MyReceiver extends BroadcastReceiver{public static final String action="acc";public void onReceive(Context context, Intent intent) {Intent i=new Intent(context,Receivered.class);i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);context.startActivity(i);}}1. 指定action和type// SIM importIntent importIntent = new Intent(Intent.ACTION_VIEW);importIntent.setType("vnd.android.cursor.item/sim-contact");importIntent.setClassName("com.android.phone", "com.android.phone.SimContacts");menu.add(0, 0, 0, R.string.importFromSim).setIcon(R.drawable.ic_menu_import_contact).setIntent(importIntent);2. 指定act ion, da ta和type(1)隱式尋找type範例程式碼：uri: content://simcontacts/simPeople/(id)intent = new Intent("android.intent.action.SIMEDIT",uri);startActivity(intent);程式會很據data中的uri去尋找匹配的type（必須的）provider中的getType()case SIM_PEOPLE_ID:return "vnd.android.cursor.item/sim-contact";設定檔中的filter設定AndroidManifest.xml<intent-filter><action android:name="android.intent.action.SIMEDIT" /><category android:name="android.intent.category.DEFAULT" /><data android:mimeType="vnd.android.cursor.item/sim-contact" /></intent-filter>也可以自己設定type，但只能使用 setDataAndType()3. 其他設定intent的屬性方式Intent setComponent(ComponentName component)Intent setClassName(Context packageContext, String className)Intent setClassName(String packageName, String className)Intent setClass(Context packageContext, Class<?> cls)Intent 應該算是Android中特有的東西。你可以在Intent中指定程式 要執行的動作（比如：view,edit,dial），以及程式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 程式，並執行該程式。下面列出幾種Intent的用法顯示網頁: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);路徑規劃: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);撥打到電話:調用撥號程式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);要使用這個必須在設定檔 中加入<uses-permission id="android .permission.CALL_PHONE" />發送SMS/MMS調用傳送簡訊的程式Intent it = new Intent(Intent.ACTION_VIEW);it.putExtra("sms_body", "The SMS text");it.setType("vnd.android-dir/mms-sms");startActivity(it);傳送簡訊Uri uri = Uri.parse("smsto:0800000123");Intent it = new Intent(Intent.ACTION_SENDTO, uri);it.putExtra("sms_body", "The SMS text");startActivity(it);發送多媒體訊息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EmailUri 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 程式Uri uri = Uri.fromParts("package", strPackageName, null);Intent it = new Intent(Intent.ACTION_DELETE, uri);startActivity(it);uninstall apkUri uninstallUri = Uri.fromParts("package", "xxx", null);returnIt = new Intent(Intent.ACTION_DELETE, uninstallUri);install apkUri installUri = Uri.fromParts("package", "xxx", null);returnIt = new Intent(Intent.ACTION_PACKAGE_ADDED, installUri);play audioUri playUri = Uri.parse("file:///sdcard/download/everything.mp3");returnIt = new Intent(Intent.ACTION_VIEW, playUri);//發送附件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"));//搜尋應用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//顯示指定應用的詳細頁面（這個好像不支援了，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
