Android URI以及Intent调用 Uri的过程举例

安卓app可以使用intent来调用URI数据，从而实现该app不能完成的功能。

就Android平台而言，URI主要分三个部分：scheme, authority and path。其中authority又分为host和port。格式如下：

scheme://host:port/path

举个实际的例子：

content://com.example.project:200/folder/subfolder/etc

\---------/  \---------------------------/ \---/ \--------------------------/

scheme                 host               port        path

\--------------------------------/

authority

现在大家应该知道data flag中那些属性的含义了吧，看下data flag

<data android:host="string"

android:mimeType="string"

android:path="string"

android:pathPattern="string"

android:pathPrefix="string"

android:port="string"

android:scheme="string" />

但是我们在程序中一般是不直接用URI来标识CP的，是的，正如我们通常见到的用定义的常量来标识。例如standard CP中的Contacts，我们就用Contacts.People.CONTENT_URI来标识Contacts CP中People这个表。那么要标识某个具体的人怎么办呢？ 这就用到了ContentUris.withAppendedId() 和 Uri.withAppendedPath()。例如我们要表示content://contacts/people/20，那么我们就可以用如下语句：

Uri uri = ContentUris.withAppendedId(People.CONTENT_URI, 20); 或者

Uri uri = Uri.withAppendedPath(People.CONTENT_URI, "20");

举些例子，如：

所有联系人的Uri： content://contacts/people

某个联系人的Uri: content://contacts/people/5

所有图片Uri: content://media/external

某个图片的Uri：content://media/external/images/media/4

下面是一些常用的Uri

//调用浏览器

Uri uri = Uri.parse("");

Intent it = new Intent(Intent.ACTION_VIEW,uri);

startActivity(it);

//显示某个坐标在地图上

Uri uri = Uri.parse("geo:38.899533,-77.036476");

Intent it = new Intent(Intent.Action_VIEW,uri);

startActivity(it);

//显示路径

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);

//拨打电话

Uri uri = Uri.parse("tel:10086");

Intent it = new Intent(Intent.ACTION_DIAL, uri);

startActivity(it);

Uri uri = Uri.parse("tel.10086");

Intent it =new Intent(Intent.ACTION_CALL,uri);

需要添加 <uses-permission id="android.permission.CALL_PHONE" /> 这个权限到androidmanifest.xml

//发送短信或彩信

Intent it = new Intent(Intent.ACTION_VIEW);

it.putExtra("sms_body", "The SMS text");

it.setType("vnd.android-dir/mms-sms");

startActivity(it);

//发送短信

Uri uri = Uri.parse("smsto:10086");

Intent it = new Intent(Intent.ACTION_SENDTO, uri);

it.putExtra("sms_body", "cwj");

startActivity(it);

//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);

//发送邮件

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"));

//播放媒体文件

Intent it = new Intent(Intent.ACTION_VIEW);

Uri uri = Uri.parse("file:///sdcard/cwj.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);

//卸载APK

Uri uri = Uri.fromParts("package", strPackageName, null);

Intent it = new Intent(Intent.ACTION_DELETE, uri);

startActivity(it);

//卸载apk 2

Uri uninstallUri = Uri.fromParts("package", "xxx", null);

returnIt = new Intent(Intent.ACTION_DELETE, uninstallUri);

//安装APK

Uri installUri = Uri.fromParts("package", "xxx", null);

returnIt = new Intent(Intent.ACTION_PACKAGE_ADDED, installUri);

//播放音乐

Uri playUri = Uri.parse("file:///sdcard/download/sth.mp3");

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

//发送附近

Intent it = new Intent(Intent.ACTION_SEND);

it.putExtra(Intent.EXTRA_SUBJECT, "The email subject text");

it.putExtra(Intent.EXTRA_STREAM, "file:///sdcard/cwj.mp3");

sendIntent.setType("audio/mp3");

startActivity(Intent.createChooser(it, "Choose Email Client"));

//market上某个应用信，pkg_name就是应用的packageName

Uri uri = Uri.parse("market://search?q=pname:pkg_name");

Intent it = new Intent(Intent.ACTION_VIEW, uri);

startActivity(it);

//market上某个应用信息，app_id可以通过www网站看下

Uri uri = Uri.parse("market://details?id=app_id");

Intent it = new Intent(Intent.ACTION_VIEW, uri);

startActivity(it);

//调用搜索

Intent intent = new Intent();

intent.setAction(Intent.ACTION_WEB_SEARCH);

intent.putExtra(SearchManager.QUERY,"android123")

startActivity(intent);