每日日报2021 5/16

今天我学习安卓的activity的基本功能

//4.打开浏览器:
// 打开Google主页
Uri uri = Uri.parse("http://www.baidu.com");
Intent intent  = new Intent(Intent.ACTION_VIEW, uri);
startActivity(intent);

//5.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);

//6.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);

//7.路径规划
// 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);

//8.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);

//9.打开摄像头拍照:
// 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");

//另一种:
//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);

//10.获取并剪切图片
// 获取并剪切图片
Intent intent =newIntent(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(newFile("/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 =newIntent("com.android.camera.action.CROP"); 
intent.setClassName("com.android.camera","com.android.camera.CropImage"); 
intent.setData(Uri.fromFile(newFile("/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);//11.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 =newIntent(Intent.ACTION_VIEW, uri);
startActivity(intent);//12.进入手机设置界面:// 进入无线网络设置界面（其它可以举一反三）  Intent intent =newIntent(android.provider.Settings.ACTION_WIRELESS_SETTINGS);  
startActivityForResult(intent,0);//13.安装apk:Uri installUri =Uri.fromParts("package","xxx",null);   
returnIt =newIntent(Intent.ACTION_PACKAGE_ADDED, installUri);//14.卸载apk:Uri uri =Uri.fromParts("package", strPackageName,null);Intent it =newIntent(Intent.ACTION_DELETE, uri);      
startActivity(it);//15.发送附件:Intent it =newIntent(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"));//16.进入联系人页面:Intent intent =newIntent();
intent.setAction(Intent.ACTION_VIEW);
intent.setData(People.CONTENT_URI);
startActivity(intent);//17.查看指定联系人:Uri personUri =ContentUris.withAppendedId(People.CONTENT_URI, info.id);//info.id联系人IDIntent intent =newIntent();
intent.setAction(Intent.ACTION_VIEW);
intent.setData(personUri);
startActivity(intent);