// web浏览器
        Uri uri = Uri.parse("http://www.baidu.com");
        Intent intent = new Intent(Intent.ACTION_VIEW, uri);
        startActivity(intent);

        // 地图(要在 Android 手机上才干測试)
        Uri uri = Uri.parse("geo:45.203,-60.003564");
        Intent intent = new Intent(Intent.ACTION_VIEW, uri);
        startActivity(intent);

        // 路径规划
        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-调用拨号程序
        Uri uri = Uri.parse("tel:13476675420");
        Intent intent = new Intent(Intent.ACTION_DIAL, uri);
        startActivity(intent);

        // 拨打电话-直接拨打电话
        // 要使用这个必须在配置文件里增加<uses-permission
        // android:name="android.permission.CALL_PHONE"/>
        Uri uri = Uri.parse("tel:13476675420");
        Intent intent = new Intent(Intent.ACTION_CALL, uri);
        startActivity(intent);

        // 调用发送短信程序(方法一)
        Uri uri = Uri.parse("smsto:13476675420");
        Intent intent = new Intent(Intent.ACTION_SENDTO, uri);
        intent.putExtra("sms_body", "The SMS text");
        startActivity(intent);

        // 调用发送短信程序(方法二)
        Intent intent = new Intent(Intent.ACTION_VIEW);
        intent.putExtra("sms_body", "The SMS text");
        intent.setType("vnd.android-dir/mms-sms");
        startActivity(intent);

        // 发送彩信
        Uri uri = Uri.parse("content://media/external/images/media/23");
        Intent intent = new Intent(Intent.ACTION_SEND);
        intent.putExtra("sms_body", "some text");
        intent.putExtra(Intent.EXTRA_STREAM, uri);
        intent.setType("image/png");
        startActivity(intent);

        // 发送Email(方法一)(要在 Android 手机上才干測试)
        Uri uri = Uri.parse("mailto:253919678@qq.com");
        Intent intent = new Intent(Intent.ACTION_SENDTO, uri);
        startActivity(intent);

        // 发送Email(方法二)(要在 Android 手机上才干測试)
        Intent intent = new Intent(Intent.ACTION_SENDTO);
        intent.setData(Uri.parse("mailto:253919678@qq.com"));
        intent.putExtra(Intent.EXTRA_SUBJECT, "这是标题");
        intent.putExtra(Intent.EXTRA_TEXT, "这是内容");
        startActivity(intent);

        // 发送Email(方法三)(要在 Android 手机上才干測试)
        Intent intent = new Intent(Intent.ACTION_SEND);
        intent.putExtra(Intent.EXTRA_EMAIL, "253919678@qq.com");
        intent.putExtra(Intent.EXTRA_SUBJECT, "这是标题");
        intent.putExtra(Intent.EXTRA_TEXT, "这是内容");
        intent.setType("text/plain");
        // 选择一个邮件client
        startActivity(Intent.createChooser(intent, "Choose Email Client"));

        // 发送Email(方法四)(要在 Android 手机上才干測试)
        Intent intent = new Intent(Intent.ACTION_SEND);
        // 收件人
        String[] tos = { "253919678@qq.com", "253919678@qq.com" };
        // 抄送人
        String[] ccs = { "253919678@qq.com", "253919678@qq.com" };
        // 密送人
        String[] bcc = { "253919678@qq.com", "253919678@qq.com" };
        intent.putExtra(Intent.EXTRA_EMAIL, tos);
        intent.putExtra(Intent.EXTRA_CC, ccs);
        intent.putExtra(Intent.EXTRA_BCC, bcc);
        intent.putExtra(Intent.EXTRA_SUBJECT, "这是标题");
        intent.putExtra(Intent.EXTRA_TEXT, "这是内容");
        intent.setType("message/rfc822");
        startActivity(Intent.createChooser(intent, "Choose Email Client"));

        // 发送Email且发送附件(要在 Android 手机上才干測试)
        Intent intent = new Intent(Intent.ACTION_SEND);
        intent.putExtra(Intent.EXTRA_SUBJECT, "The email subject text");
        intent.putExtra(Intent.EXTRA_STREAM, "file:///sdcard/mp3/醉红颜.mp3");
        intent.setType("audio/mp3");
        startActivity(Intent.createChooser(intent, "Choose Email Client"));

        // 播放媒体文件(android 对中文名的文件支持不好)
        Intent intent = new Intent(Intent.ACTION_VIEW);
        // Uri uri = Uri.parse("file:///sdcard/zhy.mp3");
        Uri uri = Uri.parse("file:///sdcard/a.mp3");
        intent.setDataAndType(uri, "audio/mp3");
        startActivity(intent);

        Uri uri = Uri.withAppendedPath(MediaStore.Audio.Media.INTERNAL_CONTENT_URI, "1");
        Intent intent = new Intent(Intent.ACTION_VIEW, uri);
        startActivity(intent);

        // 音乐选择器
        // 它使用了Intent.ACTION_GET_CONTENT 和 MIME 类型来查找支持 audio/* 的全部 Data
        // Picker，同意用户选择当中之中的一个
        Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
        intent.setType("audio/*");
        // Intent.createChooser：应用选择器。这种方法创建一个 ACTION_CHOOSER Intent
        startActivity(Intent.createChooser(intent, "选择音乐"));

        Intent intent1 = new Intent(Intent.ACTION_GET_CONTENT);
        intent1.setType("audio/*");

        Intent intent2 = new Intent(Intent.ACTION_CHOOSER);
        intent2.putExtra(Intent.EXTRA_INTENT, intent1);
        intent2.putExtra(Intent.EXTRA_TITLE, "aaaa");
        startActivity(intent2);

        // //设置壁纸
        // Intent intent = new Intent(Intent.ACTION_SET_WALLPAPER);
        // startActivity(Intent.createChooser(intent, "设置壁纸"));

        // 卸载APK
        // fromParts方法
        // 參数1：URI 的 scheme
        // 參数2：包路径
        // 參数3：
        Uri uri = Uri.fromParts("package", "com.great.activity_intent", null);
        Intent intent = new Intent(Intent.ACTION_DELETE, uri);
        startActivity(intent);

        // 安装APK(???)
        Uri uri = Uri.fromParts("package", "com.great.activity_intent", null);
        Intent intent = new Intent(Intent.ACTION_PACKAGE_ADDED, uri);
        startActivity(intent);

        // 调用搜索
        Intent intent = new Intent();
        intent.setAction(Intent.ACTION_WEB_SEARCH);
        intent.putExtra(SearchManager.QUERY, "android");
        startActivity(intent);