Android 外部存储

Android 外部存储

https://developer.android.com/guide/topics/data/data-storage.html



    protected void saveto() {
//        I/System.out: this.getDatabasePath("test")
//        I/System.out: /data/user/0/com.example.e560.m1224a/databases/test
//        I/System.out: /data/user/0/com.example.e560.m1224a/databases/test
//        I/System.out: /data/user/0/com.example.e560.m1224a/databases/test
        File f1 = this.getDatabasePath("test");
        System.out.println("this.getDatabasePath(\"test\")");
        System.out.println(f1.getAbsolutePath());
        System.out.println(f1.getPath());
        System.out.println(f1.toString());

//        I/System.out: /storage/emulated/0/Android/data/com.example.e560.m1224a/files
//        I/System.out: /storage/emulated/0/Android/data/com.example.e560.m1224a/files
//        I/System.out: /storage/emulated/0/Android/data/com.example.e560.m1224a/files
        File f2 = this.getExternalFilesDir(null);
        System.out.println("this.getExternalFilesDir(null)");
        System.out.println(f2.getAbsolutePath());
        System.out.println(f2.getPath());
        System.out.println(f2.toString());

//        I/System.out: /data
//        I/System.out: /data
//        I/System.out: /data
        File f3 = Environment.getDataDirectory();
        System.out.println("Environment.getDataDirectory()");
        System.out.println(f3.getAbsolutePath());
        System.out.println(f3.getPath());
        System.out.println(f3.toString());

//        I/System.out: /storage/emulated/0
//        I/System.out: /storage/emulated/0
//        I/System.out: /storage/emulated/0
        File f4 = Environment.getExternalStorageDirectory();
        System.out.println("Environment.getExternalStorageDirectory()");
        System.out.println(f4.getAbsolutePath());
        System.out.println(f4.getPath());
        System.out.println(f4.toString());
    }

Android IntentService 类

Android IntentService 类

https://developer.android.com/guide/components/services.html
Develop > API Guides > 应用组件


//////////////////////////////////////////////////////////////////////
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.e560.m1217a">

    <uses-permission android:name="android.permission.INTERNET"></uses-permission>
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <service android:name=".MyServer"></service>
    </application>
</manifest>


//////////////////////////////////////////////////////////////////////
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;

public class MainActivity extends AppCompatActivity {
    private int i;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        LinearLayout linearLayout = new LinearLayout(this);
        Button bt = new Button(this);
        bt.setText("SaveFiletoAndroidFile");
        linearLayout.addView(bt);
        setContentView(linearLayout);
        i = 0;
        bt.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                i++;
                SavetoServer(i);
            }
        });
    }

    protected void SavetoServer(int i) {
        String[] imgURLs = new String[]{
                "https://farm4.staticflickr.com/3239/2897452239_d2cf730467.jpg",
                "https:\\/\\/farm4.staticflickr.com\\/3050\\/2897460805_781ed40c84.jpg",
                "https:\\/\\/farm4.staticflickr.com\\/3553\\/3619665782_e9766aefe5.jpg",
                "https:\\/\\/farm4.staticflickr.com\\/3082\\/2716691340_2ea1c206aa.jpg",
                "https:\\/\\/farm4.staticflickr.com\\/3082\\/2716691340_2ea1c206aa.jpg",
        };
        Intent intent = new Intent(this, MyServer.class);
        intent.putExtra("URL", imgURLs[i].toString());
        startService(intent);
    }
}

//////////////////////////////////////////////////////////////////////

import android.app.IntentService;

import android.content.Intent;

public class MyServer extends IntentService {

    public MyServer() {

        super("test");

    }

    @Override

    protected void onHandleIntent(Intent intent) {

        HTTPClient httpClient = new HTTPClient(getApplicationContext(), intent.getStringExtra("URL"));

    }

}

//////////////////////////////////////////////////////////////////////

import android.content.Context;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.MalformedURLException;

import java.net.URL;

public class HTTPClient {

    private String urlString;

    private String FileName;

    private String savePath;

    private Context context;

    public HTTPClient(Context context, String urlString) {

        this.context = context;

        this.urlString = urlString.replace("\\", "");

        this.savePath = String.valueOf(this.context.getFilesDir());

        FileName = getFname(urlString);

        System.out.println("Thread.name Httpclient" + Thread.currentThread().getName());

        SaveFile();

    }

    public void SaveFile() {

        try {

            URL url = new URL(urlString);

            HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();

            httpURLConnection.setConnectTimeout(5 * 1000);

            httpURLConnection.setReadTimeout(5 * 1000);

            httpURLConnection.setDoInput(true);

            httpURLConnection.setRequestMethod("GET");

            if (httpURLConnection.getResponseCode() == 200) {

                File SaveF = new File(this.savePath + "/" + this.FileName);

                InputStream inputStream = httpURLConnection.getInputStream();

                FileOutputStream fos = new FileOutputStream(SaveF);

                byte[] buff = new byte[4096];

                int len = 0;

                while ((len = inputStream.read(buff)) != -1) {

                    fos.write(buff, 0, len);

                    fos.flush();

                }

                fos.close();

                inputStream.close();

            }

        } catch (MalformedURLException e) {

            e.printStackTrace();

        } catch (IOException e) {

            e.printStackTrace();

        }

    }

    protected String getFname(String url) {

        String[] temp = url.split("/");

        return temp[temp.length - 1];

    }

}

JSON 格式化 Plugin

JSON 格式化 Plugin

Notepad++ Plugin  JSTool

sublime Text Plugin PrettyJSON

Java FTP Socket

Java FTP Socket

添加对文件夹的处理。

import java.io.*;
import java.net.*;

/*
file:///E:/api/index.html
*/

class Tsocket {
public static void main(String[] args) {
try {
// File[] fs = new File[] {new File("Sublime Text Build 3114 x64.zip"), new File("Sublime Text Build 3114 x64 (2).zip"), new File("npp.6.9.2.bin.zip"), new File("Sublime Text Build 3114.zip")};

File f = new File("E:\\Android");
File[] fs = f.listFiles() ;

// UFTP u = new UFTP("xxxx.web.fc2.com", "xxxx", "xxxx");
UFTP u = new UFTP("192.168.11.7", "guest", "guest");
String code = u.FTPconnect();

if (code.equals("ConnectFTPServer")) {
u.upload(fs);
u.close();
System.out.println(code);
} else {
System.out.println(code);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}



class UFTP {
private String USER, PASSWORD;
private InetAddress FTPServerIP;
private BufferedReader FTPCmdreader;
private BufferedWriter FTPCmdwriter ;

public UFTP(String FURL, String USER, String PASSWORD) throws Exception {
this.FTPServerIP = InetAddress.getByName(FURL);
this.USER = USER;
this.PASSWORD = PASSWORD;
}

public  String FTPconnect()  {
String errorlevel = "ConnectFTPServer";
try {
Socket socket21 = new Socket (FTPServerIP, 21);
FTPCmdreader = new BufferedReader(new InputStreamReader(socket21.getInputStream()));
FTPCmdwriter = new BufferedWriter(new OutputStreamWriter(socket21.getOutputStream()));
FTPcommand(FTPCmdwriter, "USER " + USER);
FTPcommand(FTPCmdwriter, "PASS " + PASSWORD);
} catch (Exception e) {
errorlevel = "ConnectFTPerror";
}
return errorlevel;
}

public void upload(File[] files) throws Exception {
for (int i = 0; i < files.length; i++) {
if (files[i].isFile()) {
FTPcommand(FTPCmdwriter, "PASV ");
String[] temp = new String[] {};
String recode = new String();
while (true) {
recode = FTPCmdreader.readLine();
System.out.println(recode);
if (recode.substring(0, 3).equals("227")) {
temp = get227(recode);
break;
}
}
Socket socket20 = new Socket(temp[0], Integer.parseInt(temp[1]));
OutputStream ftpOutputStream = socket20.getOutputStream();
FileInputStream upfileInputStream = new FileInputStream(files[i]);
FTPcommand(FTPCmdwriter, "TYPE " + "I");
FTPcommand(FTPCmdwriter, "STOR " + files[i].getName());
System.out.println("UPDATE Filename " + files[i].getName());
byte[] buff = new byte[1024 * 1024];
int len = 0;
while ( (len = upfileInputStream.read(buff) ) != -1) {
ftpOutputStream.write(buff, 0, len);
ftpOutputStream.flush();
System.out.print("*");
}
ftpOutputStream.close();
upfileInputStream.close();
System.out.println("");
Thread.sleep(5 * 1000);
}
}
}

public void close() {
try {
FTPcommand(FTPCmdwriter, "QUIT ");
String temp = null;
while ( (temp = FTPCmdreader.readLine() ) != null) {
System.out.println(temp);
}
System.out.println("");
FTPCmdwriter.close();
FTPCmdreader.close();
} catch (Exception e) {

}
}
private void FTPcommand(BufferedWriter FTPCmdwriter, String FTPcmd) throws Exception {
FTPCmdwriter.write(FTPcmd +  "\r\n");
FTPCmdwriter.flush();
}

protected String[] get227(String string) {
int start = string.indexOf("(") + 1;
int end = string.indexOf(")");
String substring = string.substring(start, end);
String[] temp = substring.split(",");
String ip = temp[0] + "." + temp[1] + "." + temp[2] + "." + temp[3];
int port = Integer.parseInt(temp[4]) * 256 + Integer.parseInt(temp[5]);
String sport = String.valueOf(port);
String[] res = {ip, sport};
return res;
}
}

FTP命令 FTP响应码

FTP命令

命令	描述
ABOR	中断数据连接程序
ACCT <account>	系统特权帐号
ALLO <bytes>	为服务器上的文件存储器分配字节
APPE <filename>	添加文件到服务器同名文件
CDUP <dir path>	改变服务器上的父目录
CWD <dir path>	改变服务器上的工作目录
DELE <filename>	删除服务器上的指定文件
HELP <command>	返回指定命令信息
LIST <name>	如果是文件名列出文件信息，如果是目录则列出文件列表
MODE <mode>	传输模式（S=流模式，B=块模式，C=压缩模式）
MKD <directory>	在服务器上建立指定目录
NLST <directory>	列出指定目录内容
NOOP	无动作，除了来自服务器上的承认
PASS <password>	系统登录密码
PASV	请求服务器等待数据连接
PORT <address>	IP 地址和两字节的端口 ID
PWD	显示当前工作目录
QUIT	从 FTP 服务器上退出登录
REIN	重新初始化登录状态连接
REST <offset>	由特定偏移量重启文件传递
RETR <filename>	从服务器上找回（复制）文件
RMD <directory>	在服务器上删除指定目录
RNFR <old path>	对旧路径重命名
RNTO <new path>	对新路径重命名
SITE <params>	由服务器提供的站点特殊参数
SMNT <pathname>	挂载指定文件结构
STAT <directory>	在当前程序或目录上返回信息
STOR <filename>	储存（复制）文件到服务器上
STOU <filename>	储存文件到服务器名称上
STRU <type>	数据结构（F=文件，R=记录，P=页面）
SYST	返回服务器使用的操作系统
TYPE <data type>	数据类型（A=ASCII，E=EBCDIC，I=binary）
USER <username>>	系统登录的用户名

FTP响应码

响应代码	解释说明
110	新文件指示器上的重启标记
120	服务器准备就绪的时间（分钟数）
125	打开数据连接，开始传输
150	打开连接
200	成功
202	命令没有执行
211	系统状态回复
212	目录状态回复
213	文件状态回复
214	帮助信息回复
215	系统类型回复
220	服务就绪
221	退出网络
225	打开数据连接
226	结束数据连接
227	进入被动模式（IP 地址、ID 端口）
230	登录因特网
250	文件行为完成
257	路径名建立
331	要求密码
332	要求帐号
350	文件行为暂停
421	服务关闭
425	无法打开数据连接
426	结束连接
450	文件不可用
451	遇到本地错误
452	磁盘空间不足
500	无效命令
501	错误参数
502	命令没有执行
503	错误指令序列
504	无效命令参数
530	未登录网络
532	存储文件需要帐号
550	文件不可用
551	不知道的页类型
552	超过存储分配
553	文件名不允许

Android FTP 文件上传

Android FTP 文件上传

package com.example.e560.m1126a.ToolsClass;

import android.util.Log;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.InetAddress;
import java.net.Socket;

/**
 * Created by E560 on 2016/12/04.
 */

public class sun_FTP {

    private String ftp_url, ftp_user, ftp_password;
    private boolean ftp_open;
    private String TAG = "sun_FTP";

    public sun_FTP(String ftp_url, String ftp_user, String ftp_password) {
        this.ftp_url = ftp_url;
        this.ftp_user = ftp_user;
        this.ftp_password = ftp_password;
        this.ftp_open = true;
    }

    public void Ftp_connect(String file_mode, File file) throws IOException {
        InetAddress inetAddress = InetAddress.getByName(ftp_url);
        Socket socket21 = new Socket(inetAddress.getHostAddress(), 21);
        BufferedReader ftpcmd_input = new BufferedReader(new InputStreamReader(socket21.getInputStream()));
        BufferedWriter ftpcmd_output = new BufferedWriter(new OutputStreamWriter(socket21.getOutputStream()));
        sendFTPcommand(ftpcmd_output, "USER " + ftp_user);
        sendFTPcommand(ftpcmd_output, "PASS " + ftp_password);
        sendFTPcommand(ftpcmd_output, "PASV ");

        switch (file_mode) {
            case "upFile":
                while (ftp_open) {
                    String temp = ftpcmd_input.readLine();
                    Log.i(TAG, temp);
                    String code = temp.substring(0, 3);
                    //进入被动模式（IP 地址、ID 端口）
                    if (code.equals("227")) {
                        String[] temp2 = get227(temp);
                        sendFTPcommand(ftpcmd_output, "TYPE " + "I");
                        sendFTPcommand(ftpcmd_output, "STOR " + file.getName());
                        upFile(temp2, file);
                        sendFTPcommand(ftpcmd_output, "QUIT");
                        ftpcmd_output.
                    }
                }
                break;
            case "downFile":

                break;
            case "Del_file":

                break;
        }
    }

    private void upFile(String[] urltemp, File file) throws IOException {
        Socket dataSocket = new Socket(urltemp[0], Integer.parseInt(urltemp[1]));
        OutputStream outputStream = dataSocket.getOutputStream();
        FileInputStream fileInputStream = new FileInputStream(file);
        byte[] buff = new byte[20480];
        int len = 0;
        while ((len = fileInputStream.read(buff)) != -1) {
            outputStream.write(buff, 0, len);
            outputStream.flush();
        }
        outputStream.close();
        fileInputStream.close();
        dataSocket.close();
        ftp_open = false;
    }

    protected void sendFTPcommand(BufferedWriter ftpcmd_output, String command) throws IOException {
        ftpcmd_output.write(command + "\r\n");
        ftpcmd_output.flush();
        if (command.equals("QUIT")) {
            ftpcmd_output.close();
        }
    }

    protected Socket ftpSocket() throws IOException {
        Socket socket = new Socket(ftp_url, 21);

        return null;
    }

    protected String[] get227(String string) {
        //227 Entering Passive Mode (208,71,106,43,237,147).
        int start = string.indexOf("(") + 1;
        int end = string.indexOf(")");
        String substring = string.substring(start, end);
        Log.i(TAG, substring);
        String[] temp = substring.split(",");
        String ip = temp[0] + "." + temp[1] + "." + temp[2] + "." + temp[3];
        int port = Integer.parseInt(temp[4]) * 256 + Integer.parseInt(temp[5]);
        String sport = String.valueOf(port);
        Log.i(TAG, "POST " + port);
        String[] res = {ip, sport};
        return res;
    }
}

Java Socket 连接

Java Socket 连接

import java.net.*;
import java.io.*;

public class main {
public static void main(String[] args) {
TserverSocket();
}

public static void TserverSocket() {
try {
int port = 1024;
ServerSocket ss = new ServerSocket(port);
while (true) {
Socket soc = ss.accept();
System.out.println(soc);
OutputStream os = soc.getOutputStream();
OutputStreamWriter oos = new OutputStreamWriter(os);
System.out.println("server accept");
for (int i = 0; i < 1024; i++) {
oos.write(i);
oos.flush();
}
oos.close();
}
} catch (Exception e) {
}
}
}

import java.io.*;
import java.net.*;

class main {
public static void main(String[] args) {
client();
}

public static void client() {
try {
Socket s = new Socket("192.168.11.107", 1024);
InputStream is = s.getInputStream();
InputStreamReader iis = new InputStreamReader(is);
int i = 0;
while ( (i = iis.read() ) != -1 ) {
System.out.println(i);
}
System.out.println(s);
iis.close();

} catch (Exception e) {

}
}
}

Android 网络信息和IP地址

Android 网络信息和IP地址

package com.example.java.m1202a;

import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        System.out.println(this.getClass().getCanonicalName());
        test_network();
        test_ipadd();
    }

    /**
     * <uses-permission android:name="android.permission.INTERNET"/>
     * <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
     */

    protected void test_network() {
        ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(getApplicationContext().CONNECTIVITY_SERVICE);
        NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
        System.out.println("toString  " + networkInfo.toString());
        System.out.println("getType  " + networkInfo.getType());
        System.out.println("getTypeName  " + networkInfo.getTypeName());
        System.out.println("getState  " + networkInfo.getState());
        System.out.println("getDetailedState  " + networkInfo.getDetailedState());
        System.out.println("getReason  " + networkInfo.getReason());
        System.out.println("getSubtypeName  " + networkInfo.getSubtypeName());
        System.out.println("getExtraInfo  " + networkInfo.getExtraInfo());
        System.out.println("describeContents  " + networkInfo.describeContents());
        System.out.println(networkInfo.getClass().getCanonicalName());
    }


    protected void test_ipadd() {
        System.out.println("test_ipadd 7777");
        try {
            Enumeration<NetworkInterface> networkInterfaces = null;
            networkInterfaces = NetworkInterface.getNetworkInterfaces();
            while (networkInterfaces.hasMoreElements()) {
                NetworkInterface networkInterface2 = networkInterfaces.nextElement();
                Enumeration<InetAddress> ipadd = networkInterface2.getInetAddresses();
                while (ipadd.hasMoreElements()) {
                    System.out.println(ipadd.nextElement().toString());
                }
            }
            System.out.println(networkInterfaces.getClass().getCanonicalName());
        } catch (SocketException e) {
            e.printStackTrace();
        }
    }
}

Android 保存 GridView 的位置

保存 GridView 的位置

gridView.getFirstVisiblePosition();


        gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                cursor.moveToPosition(position);
                String name = cursor.getString(cursor.getColumnIndex("name"));
                String img_url = cursor.getString(cursor.getColumnIndex("img_url"));
                Toast.makeText(ListPage.this, img_url, Toast.LENGTH_SHORT).show();
                grp = gridView.getFirstVisiblePosition();
                Intent intent = new Intent(getApplicationContext(), Idolpiclist.class);
                intent.putExtra("name", name);
                startActivity(intent);
            }
        });




       
    private class Myhand extends Handler {
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            cursor = (Cursor) msg.obj;
            System.out.println(cursor.getCount());
            GridView gridView = (GridView) findViewById(R.id.List_page_gridview);
            gridView.setSelection(grp+1);
            gridView.setAdapter(new Myadapter());
        }
    }

android.os.Process.setThreadPriority(-8);

android.os.Process.setThreadPriority(-8);


    private class MyThread extends Thread {
        @Override
        public void run() {
            android.os.Process.setThreadPriority(-8);
            super.run();
            FlickrSQL flickrSQL = new FlickrSQL(getApplicationContext());
            Message message = myhand.obtainMessage();
            message.obj = flickrSQL.SelectallIdol();
            myhand.sendMessage(message);
        }
    }

Android getDrawable，getColor 过时的替代方法

Android getDrawable，getColor 过时的替代方法

public class ContextCompat{}

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        RelativeLayout relativeLayout = (RelativeLayout) findViewById(R.id.activity_main);
        LinearLayout linearLayout = new LinearLayout(this);
        linearLayout.setOrientation(LinearLayout.VERTICAL);
        relativeLayout.addView(linearLayout);

        for (int i = 0; i < 3; i++) {
            ImageView imageView = new ImageView(this);
//          过时
//          imageView.setImageDrawable(getDrawable(R.drawable.android));
//          替代方法
            imageView.setImageDrawable(ContextCompat.getDrawable(getApplicationContext(), R.drawable.firefox));
            TextView textView = new TextView(this);
            textView.setBackgroundColor(ContextCompat.getColor(getApplicationContext(), android.R.color.holo_orange_dark));
            textView.setText(String.valueOf(i));
            imageView.setId(i);
            textView.setId(i);
            linearLayout.addView(imageView);
            linearLayout.addView(textView);
            imageView.setOnClickListener(this);
            textView.setOnClickListener(this);
        }
    }

    @Override
    public void onClick(View v) {
        String idinfo = "";
        switch (v.getId()) {
            case 1:
                idinfo = "Button1";
                break;
            case 2:
                idinfo = "Button2";
                break;
            case 0:
                idinfo = "Button1";
                break;
        }
        Toast.makeText(this, idinfo, Toast.LENGTH_SHORT).show();
    }
}