Question

我想通过Android应用程序中的覆盆子pi上的ssh执行以下命令：

echo 'value of a variable string named cmd' > filename.txt

我试过以下：

String a="echo '";
String c="' > filename.txt";
String cmd=a+clip+b;
channelSsh.setCommand(cmd);

普通命令，如＆＃34; sudo reboot＆＃34;有效但不是这个！

我的程序有点长但你可以找到一个简单的JSch实现程序Here（第二个答案）。

如果您仍想查看我的代码（事情在copyMethod（）和executeRemoteCommand（）函数中）：

JAVA：

package com.quickclip.panky.quickclip;

import android.app.Activity;
import android.content.ClipData;
import android.content.ClipboardManager;
import android.content.Context;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import com.jcraft.jsch.ChannelExec;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.Session;

import java.io.ByteArrayOutputStream;
import java.util.Properties;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    EditText e1;
    Button b1,b2,b3;
    TextView t1,t2;
    Activity activity = this;
    static int flag=2,time=3000;
    static ClipData clip=null;
    String output;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        e1 = (EditText) findViewById(R.id.editText);
        t1 = (TextView) findViewById(R.id.textView);
        t2 = (TextView) findViewById(R.id.textView3);
        b1 = (Button) findViewById(R.id.button1);
        b2 = (Button) findViewById(R.id.button2);
        b3 = (Button) findViewById(R.id.button3);

        getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);

        b1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                CopyMethod();
            }
        });

        b2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                VolDown();
            }
        });

        b3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                CopyPace();
            }
        });

        Runnable myRunnable = new Runnable() {
            @Override
            public void run() {
                while (true) {
                    if (flag % 2 == 0) {
                        try {
                            Thread.sleep(time);
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    } else if (flag % 2 != 0) {
                        try {
                            Thread.sleep(800);
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                    activity.runOnUiThread(new Runnable() {
                        public void run() {
                            CopyMethod();
                            flag += 1;
                        }
                    });
                }
            }
        };

        Thread myThread = new Thread(myRunnable);
        myThread.start();
    }

    public void VolDown(View view) {VolDown();}
    public void CopyPace(View view) {CopyPace();}
    public void ManCopy(View view) {CopyMethod();}

    public void VolDown() {
        ClipboardManager clipboard = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);
        ClipData clip = ClipData.newPlainText("Copied Text","decrease volume");
        clipboard.setPrimaryClip(clip);
    }

    public void CopyPace() {
        if(time==5000) time=2000;
        else if(time<5000) time+=1000;
        t1.setText("Automatically Sending in: "+(time/1000)+" sec");
    }

    public void CopyMethod() {
        ClipboardManager clipboard = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);
        ClipData clip = ClipData.newPlainText("Copied Text", (CharSequence) e1.getText().toString());
        clipboard.setPrimaryClip(clip);

        new AsyncTask<Integer, Void, Void>(){
            @Override
            protected Void doInBackground(Integer... params) {
                try {
                    output=executeRemoteCommand();
                    t2.setText(output);
                } catch (Exception e) {
                    e.printStackTrace();
                }
                return null;
            }
        }.execute(1);

        e1.setText("");
    }

    public static String executeRemoteCommand()
            throws Exception {
        String username="pi";
        String password="10<,mmXLSQ";
        String hostname="192.168.43.41";
        int port=22;
        String a="echo '",c="' > yo.txt";

        JSch jsch = new JSch();
        Session session = jsch.getSession(username, hostname, port);
        session.setPassword(password);

        // Avoid asking for key confirmation
        Properties prop = new Properties();
        prop.put("StrictHostKeyChecking", "no");
        session.setConfig(prop);

        session.connect();

        // SSH Channel
        ChannelExec channelSsh = (ChannelExec)
                session.openChannel("exec");
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        channelSsh.setOutputStream(baos);

        // Execute command
        String cmd=a+clip+c;
        channelSsh.setCommand(cmd);
        channelSsh.connect();
        channelSsh.disconnect();

        return baos.toString();
    }

    @Override
    public void onClick(View view) {CopyMethod();VolDown();CopyPace();}
}

XML：

<?xml version="1.0" encoding="utf-8"?>
<android.widget.RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.quickclip.panky.quickclip.MainActivity">

    <EditText
        android:id="@+id/editText"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="30dp"
        android:ems="100"
        android:inputType="textAutoCorrect" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentEnd="true"
        android:layout_below="@+id/editText"
        android:text="Send it Now"
        android:onClick="ManCopy"/>

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_below="@+id/editText"
        android:text="Volume Down"
        android:onClick="VolDown"/>

    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/editText"
        android:layout_centerHorizontal="true"
        android:text="Switch Pace"
        android:onClick="CopyPace"/>

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/button"
        android:layout_centerHorizontal="true"
        android:textSize="20dp"
        android:layout_marginTop="130dp"
        android:text="Automatically Sending in: 3 sec" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textView"
        android:layout_centerHorizontal="true"
        android:textSize="20dp"
        android:text="Speak/Type in this time" />

    <TextView
        android:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textView2"
        android:layout_centerHorizontal="true"
        android:textSize="20dp"
        android:text="Connecting to SSH" />

</android.widget.RelativeLayout>

Answer 1

始终clip中使用null

的executeRemoteCommand（）方法内的String cmd=a+clip+c;

你在这里调用ClipData.toString（），返回对象的字符串表示

从ClipData中获取文本

String text = "";
ClipData clip = getPrimaryClip();
    if (clip != null && clip.getItemCount() > 0) {
     text = clip.getItemAt(0).coerceToText(mContext);
}

它将检索主剪辑并强制将其转换为字符串

在执行前使用Log记录命令，并检查您是否使用了正确的命令

Answer 2

我解决了我的问题，...谢谢你的时间...... thnx Arpan ......

package com.quickclip.panky.quickclip;

import android.app.Activity;
import android.content.ClipData;
import android.content.ClipboardManager;
import android.content.Context;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import com.jcraft.jsch.ChannelExec;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.Session;

import java.io.ByteArrayOutputStream;
import java.util.Properties;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    EditText e1;
    Button b1,b2,b3;
    TextView t1,t2;
    Activity activity = this;
    static int flag=2,time=3000;
    static ClipData clip=null;
    String output;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        e1 = (EditText) findViewById(R.id.editText);
        t1 = (TextView) findViewById(R.id.textView);
        t2 = (TextView) findViewById(R.id.textView3);
        b1 = (Button) findViewById(R.id.button1);
        b2 = (Button) findViewById(R.id.button2);
        b3 = (Button) findViewById(R.id.button3);

        getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);

        b1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                CopyMethod();
            }
        });

        b2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                VolDown();
            }
        });

        b3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                CopyPace();
            }
        });

        Runnable myRunnable = new Runnable() {
            @Override
            public void run() {
                while (true) {
                    if (flag % 2 == 0) {
                        try {
                            Thread.sleep(time);
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    } else if (flag % 2 != 0) {
                        try {
                            Thread.sleep(800);
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                    activity.runOnUiThread(new Runnable() {
                        public void run() {
                            CopyMethod();
                            flag += 1;
                        }
                    });
                }
            }
        };

        Thread myThread = new Thread(myRunnable);
        myThread.start();
    }

    public void VolDown(View view) {VolDown();}
    public void CopyPace(View view) {CopyPace();}
    public void ManCopy(View view) {CopyMethod();}

    public void VolDown() {
        ClipboardManager clipboard = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);
        ClipData clip = ClipData.newPlainText("Copied Text","decrease volume");
        clipboard.setPrimaryClip(clip);
    }

    public void CopyPace() {
        if(time==5000) time=2000;
        else if(time<5000) time+=1000;
        t1.setText("Automatically Sending in: "+(time/1000)+" sec");
    }

    public void CopyMethod() {

        final String username="pi";
        final String password="10<,mmXLSQ";
        final String hostname="192.168.43.41";
        final int port=22;
        final String a="echo '",c="' > panky.txt";

        ClipboardManager clipboard = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);
        final ClipData clip = ClipData.newPlainText("Copied Text", (CharSequence) e1.getText().toString());
        clipboard.setPrimaryClip(clip);

        new AsyncTask<Integer, Void, Void>(){
            @Override
            protected Void doInBackground(Integer... params) {
                try {
                    JSch jsch = new JSch();
                    Session session = jsch.getSession(username, hostname, port);
                    session.setPassword(password);

                    // Avoid asking for key confirmation
                    Properties prop = new Properties();
                    prop.put("StrictHostKeyChecking", "no");
                    session.setConfig(prop);

                    session.connect();

                    // SSH Channel
                    ChannelExec channelSsh = (ChannelExec)
                            session.openChannel("exec");
                    ByteArrayOutputStream baos = new ByteArrayOutputStream();
                    channelSsh.setOutputStream(baos);

                    // Execute command
                    String cmd=a+clip+c;
                    channelSsh.setCommand(cmd);
                    channelSsh.connect();
                    channelSsh.disconnect();

                    t2.setText(output);
                } catch (Exception e) {
                    e.printStackTrace();
                }
                return null;
            }
        }.execute(1);

        e1.setText("");
    }

    @Override
    public void onClick(View view) {CopyMethod();VolDown();CopyPace();}
}

JSch Android

2 个答案: