Intent 的使用

前面讲了Intent的机制,下面看看怎么使用Intent：

// 给移动客服10086拨打电话Uri uri = Uri.parse("tel:10086");Intent intent = new Intent(Intent.ACTION_DIAL, uri);

// 给 [e-mail]发邮件 Uri uri4 = Uri.parse("mailto:[e-mail]"); Intent intent4 = new Intent(Intent.ACTION_SENDTO, uri4);

// 给[e-mail]发邮件发送内容为“Hello”的邮件Intent intent = new Intent(Intent.ACTION_SEND);intent.putExtra(Intent.EXTRA_EMAIL, "[e-mail]");intent.putExtra(Intent.EXTRA_SUBJECT, "Subject");intent.putExtra(Intent.EXTRA_TEXT, "Hello");intent.setType("text/plain");

// 给多人发邮件String[] tos = {"[e-mail]", "[e-mail]"};// 收件人String[] ccs = {"[e-mail]", "[e-mail]"}; // 抄送String[] bccs = {"[e-mail]", "[e-mail]"}; // 密送intent.putExtra(Intent.EXTRA_EMAIL, tos);intent.putExtra(Intent.EXTRA_CC, ccs);intent.putExtra(Intent.EXTRA_BCC, bccs);intent.putExtra(Intent.EXTRA_SUBJECT, "Subject");intent.putExtra(Intent.EXTRA_TEXT, "Hello");intent.setType("message/rfc822");

// 发送消息Uri uri1 = Uri.parse("smsto:10010");Intent intent1 = new Intent(Intent.ACTION_SENDTO,uri1);intent1.putExtra("sms_body","Hello");

//发送彩信（相当于发送带附件的短信）Intent intent2 = new Intent(Intent.ACTION_SEND);intent1.putExtra("sms_body","Hello");Uri uri2 = Uri.parse("content://media/external/images/media/23");intent.putExtra(Intent.EXTRA_STREAM, uri2);intent.setType("image/png");

// 打开百度主页 Uri uri3 = Uri.parse("http://www.baidu.com"); Intent intent3 = new Intent(Intent.ACTION_VIEW, uri3);startActivity(intent);

显示地图与路径规划

// 打开Google地图中国北京位置（北纬39.9，东经116.3）Uri uri = Uri.parse("geo:39.9,116.3");Intent intent = new Intent(Intent.ACTION_VIEW, uri);startActivity(intent);// 路径规划：从北京某地（北纬39.9，东经116.3）到上海某地（北纬31.2，东经121.4）Uri uri = Uri.parse("http://maps.google.com/maps?f=d&saddr=39.9 116.3&daddr=31.2 121.4");Intent intent = new Intent(Intent.ACTION_VIEW, uri);startActivity(intent);

多媒体播放

Intent intent = new Intent(Intent.ACTION_VIEW);Uri uri = Uri.parse("file:///sdcard/foo.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);

拍照

// 打开拍照程序Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); startActivityForResult(intent, 0);// 取出照片数据Bundle extras = intent.getExtras();Bitmap bitmap = (Bitmap) extras.get("data");

获取并剪切图片

// 获取并剪切图片Intent intent = new Intent(Intent.ACTION_GET_CONTENT);intent.setType("image/*");intent.putExtra("crop", "true"); // 开启剪切intent.putExtra("aspectX", 1); // 剪切的宽高比为1：2intent.putExtra("aspectY", 2);intent.putExtra("outputX", 20); // 保存图片的宽和高intent.putExtra("outputY", 40);intent.putExtra("output", Uri.fromFile(new File("/mnt/sdcard/temp"))); // 保存路径intent.putExtra("outputFormat", "JPEG");// 返回格式startActivityForResult(intent, 0);

剪切特定图片

Intent intent = new Intent("com.android.camera.action.CROP");intent.setClassName("com.android.camera", "com.android.camera.CropImage");intent.setData(Uri.fromFile(new File("/mnt/sdcard/temp")));intent.putExtra("outputX", 1); // 剪切的宽高比为1：2intent.putExtra("outputY", 2);intent.putExtra("aspectX", 20); // 保存图片的宽和高intent.putExtra("aspectY", 40);intent.putExtra("scale", true); intent.putExtra("noFaceDetection", true);intent.putExtra("output", Uri.parse("file:///mnt/sdcard/temp"));startActivityForResult(intent, 0);

打开Google Market

// 打开Google Market直接进入该程序的详细页面Uri uri = Uri.parse("market://details?id=" + "com.demo.app");Intent intent = new Intent(Intent.ACTION_VIEW, uri);startActivity(intent);//安装和卸载程序

Uri uri = Uri.fromParts("package", "com.demo.app", null);Intent intent = new Intent(Intent.ACTION_DELETE, uri);startActivity(intent);//进入设置界面

Intent intent = new Intent(android.provider.Settings.ACTION_WIRELESS_SETTINGS);startActivityForResult(intent, 0);//进入无线网络设置界面（其它可以举一反三）