← Android Activity 状态保存 Android Activity 数据传递 →

Android 系统内置 Activity

Android 系统内置了大量的 Activity

拨打电话

给移动客服 10086 拨打电话

Uri uri = Uri.parse("tel:10086");
Intent intent = new Intent(Intent.ACTION_DIAL, uri);
startActivity(intent);

发送短信

给10086发送内容为 "Hello"的短信

Uri uri = Uri.parse("smsto:10086");
Intent intent = new Intent(Intent.ACTION_SENDTO, uri);
intent.putExtra("sms_body", "Hello");
startActivity(intent);

发送彩信（相当于发送带附件的短信）

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

打开浏览器访问 baidu.com 主页

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

发送电子邮件(阉割了 Google服务的没戏)

给someone@domain.com发邮件

Uri uri = Uri.parse("mailto:someone@domain.com");
Intent intent = new Intent(Intent.ACTION_SENDTO, uri);
startActivity(intent);

给 someone@domain.com 发邮件发送内容为 "Hello" 的邮件

Intent intent = new Intent(Intent.ACTION_SEND);
intent.putExtra(Intent.EXTRA_EMAIL, "someone@domain.com");
intent.putExtra(Intent.EXTRA_SUBJECT, "Subject");
intent.putExtra(Intent.EXTRA_TEXT, "Hello");
intent.setType("text/plain");
startActivity(intent);

给多人发邮件

Intent intent=new Intent(Intent.ACTION_SEND);
String[] tos = {"1@abc.com", "2@abc.com"}; // 收件人
String[] ccs = {"3@abc.com", "4@abc.com"}; // 抄送
String[] bccs = {"5@abc.com", "6@abc.com"}; // 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");
startActivity(intent);

显示地图

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);

地图路径规划

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);

获取 SD 卡下所有音频文件,然后播放第一首

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

打开摄像头拍照

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");

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);

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1：2
intent.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1：2
intent.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 Play

打开 Google Play 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);

进入手机设置界面

进入无线网络设置界面

Intent intent = new Intent(android.provider.Settings.ACTION_WIRELESS_SETTINGS);
startActivityForResult(intent, 0);

安装 apk

Uri installUri = Uri.fromParts("package", "xxx", null);   
returnIt = new Intent(Intent.ACTION_PACKAGE_ADDED, installUri);

卸载 apk

Uri uri = Uri.fromParts("package", strPackageName, null);      
Intent it = new Intent(Intent.ACTION_DELETE, uri);      
startActivity(it);

发送附件

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"));

进入联系人页面

Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setData(People.CONTENT_URI);
startActivity(intent);

查看指定联系人

//info.id联系人ID
Uri personUri = ContentUris.withAppendedId(People.CONTENT_URI, info.id);
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setData(personUri);
startActivity(intent);

参考文档

Android Activity