Android 开发常用Uri介绍

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Uri的定义:通用资源标识符(Universal Resource Identifier),Uri代表要操作的数据,Android 上每种可用的资源,包括图像、视频、联系人等都可以用Uri来表示。Uri的组成一般分成三部分:访问资源的命名机制、存放资源的主机名、资源自身的名称,由路径表示。

例如所有联系人的Uri: content://contacts/people ,某张图片的Uri: content://media/external/images/media/4 。Android开发过程中常用的Uri如下:

<pre name="code" class="java">    一、直接拨打电话,与三不同的是,这个直接拨打电话,而不是打开拨号界面        Uri uri = Uri.parse("tel:10086");        Intent intent = new Intent(Intent.ACTION_CALL, uri);    二、打开拨号界面,类型是Intent.ACTION_DIAL        Uri uri = Uri.parse("tel:10086");        Intent intent = new Intent(Intent.ACTION_DIAL, uri);    三、打开一个网页,类别是Intent.ACTION_VIEW        Uri uri = Uri.parse("http://www.android-study.net/");        Intent intent = new Intent(Intent.ACTION_VIEW, uri);    四、卸载一个应用,Intent的类别是Intent.ACTION_DELETE        Uri uri = Uri.fromParts("package", "xxx", null);        Intent intent = new Intent(Intent.ACTION_DELETE, uri);    五、打开地图并定位到一个点        Uri uri = Uri.parse("geo:52.76,-79.0342");        Intent intent = new Intent(Intent.ACTION_VIEW, uri);    六、播放音频文件        Uri uri = Uri.parse("file:///sdcard/download/everything.mp3");        Intent intent = new Intent(Intent.ACTION_VIEW, uri);        intent.setType("audio/mp3");    七、安装应用程序,Intent的类别是Intent.ACTION_PACKAGE_ADDED        Uri uri = Uri.fromParts("package", "xxx", null);        Intent intent = new Intent(Intent.ACTION_PACKAGE_ADDED, uri);    八、打开发邮件界面        Uri uri= Uri.parse("mailto:androidstudynet@126.com");        Intent intent = new Intent(Intent.ACTION_SENDTO, uri);    九、发邮件,与上一个不同这里是将邮件发送出去        Intent intent = new Intent(Intent.ACTION_SEND);        String[] tos = { "androidstudynet@126.com" };        String[] ccs = { "aaa@126.com" };        intent.putExtra(Intent.EXTRA_EMAIL, tos);        intent.putExtra(Intent.EXTRA_CC, ccs);        intent.putExtra(Intent.EXTRA_TEXT, "I come from http://www.android-study.net");        intent.putExtra(Intent.EXTRA_SUBJECT, "                http://www.android-study.net");intent.setType("message/rfc882");        Intent.createChooser(intent, "Choose Email Client");        //发送带附件的邮件        Intent intent = new Intent(Intent.ACTION_SEND);        intent.putExtra(Intent.EXTRA_SUBJECT, "The email subject text");        intent.putExtra(Intent.EXTRA_STREAM, "file:///sdcard/mynusic.mp3");        intent.setType("audio/mp3");        startActivity(Intent.createChooser(intent, "Choose Email Client"));    十、直接发短信        Uri uri= Uri.parse("smsto://100861");        Intent intent = new Intent(Intent.ACTION_SENDTO, uri);        intent.putExtra("sms_body", "安卓发送邮件测试http://www.android-study.net");    十一、发彩信        Uri uri= Uri.parse("content://media/external/images/media/23");        Intent intent = new Intent(Intent.ACTION_SEND);        intent.putExtra("sms_body", "安卓发送邮件测试http://www.android-study.net");        intent.putExtra(Intent.EXTRA_STREAM, uri);        intent.setType("image/png");    十二、发短信        Uri uri= Uri.parse("tel:10086");        Intent intent = new Intent(Intent.ACTION_VIEW, uri);        intent.putExtra("sms_body", "安卓发送邮件测试http://www.android-study.net");        intent.setType("vnd.Android-dir/mms-sms");    十三、调用相册        public static final String MIME_TYPE_IMAGE_JPEG = "image/*";        public static final int ACTIVITY_GET_IMAGE = 0;        Intent getImage = new Intent(Intent.ACTION_GET_CONTENT);        getImage.addCategory(Intent.CATEGORY_OPENABLE);        getImage.setType(MIME_TYPE_IMAGE_JPEG);        startActivityForResult(getImage, ACTIVITY_GET_IMAGE);    十四、# Market 相关        1 //寻找某个应用        Uri uri = Uri.parse("market://search?q=pname:pkg_name");        Intent it = new Intent(Intent.ACTION_VIEW, uri);        startActivity(it);         2 //显示某个应用的相关信息        Uri uri = Uri.parse("market://details?id=app_id");        Intent it = new Intent(Intent.ACTION_VIEW, uri);        startActivity(it);    十五、安装指定apk        public void setupAPK(String apkname){            String fileName = Environment.getExternalStorageDirectory() + "/" +     apkname;            Intent intent = new Intent(Intent.ACTION_VIEW);            intent.setDataAndType(Uri.fromFile(newFile(fileName)), "application/vnd.android.package-archive");            mService.startActivity(intent);        }    十六、路径规划        Uri uri = Uri.parse("http://maps.google.com/maps?f=d&saddr=startLat startLng&daddr=endLat endLng&hl=en");        Intent it = new Intent(Intent.ACTION_VIEW, uri);        startActivity(it);    十七、进入联系人页面        Intent intent = new Intent();        intent.setAction(Intent.ACTION_VIEW);        intent.setData(People.CONTENT_URI);        startActivity(intent);    十八、查看指定联系人        Uri personUri = ContentUris.withAppendedId(People.CONTENT_URI, info.id);//   info.id联系人ID        Intent intent = new Intent();        intent.setAction(Intent.ACTION_VIEW);        intent.setData(personUri);        startActivity(intent);    十九、调用系统相机应用程序,并存储拍下来的照片        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);        time = Calendar.getInstance().getTimeInMillis();        intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(Environment.getExternalStorageDirectory().
        getAbsolutePath()+"/tucue", time + ".jpg")));        startActivityForResult(intent, ACTIVITY_GET_CAMERA_IMAGE);

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