单击另一个按钮后如何启用/禁用按钮？

Question

I have 4 buttons that work like a process which is user need to click button 1 before button 2 is enabled to be click. To be able to click button 3, a user needs to click button 2 after then the button 3 is able to be a click, the same goes to button 4 which is all the button is enabled to click at the end when user click button 4. I manage to get button 1 and button 2 work but after user click button 2, button 3 is not able to click.

This is the XML file:

<?xml version="1.0" encoding="utf-8"?>
    <androidx.constraintlayout.widget.ConstraintLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/linearLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <Button
        android:id="@+id/button2"
        android:layout_width="174dp"
        android:layout_height="41dp"
        android:layout_marginStart="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginTop="60dp"
        android:layout_marginEnd="8dp"
        android:layout_marginRight="8dp"
        android:layout_marginBottom="280dp"
        android:onClick="goToAnotherActivity1"
        android:enabled="true"
        android:text="@string/reconnaissance"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/button3"
        android:layout_width="174dp"
        android:layout_height="41dp"
        android:layout_marginStart="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginTop="50dp"
        android:layout_marginEnd="8dp"
        android:layout_marginRight="8dp"
        android:layout_marginBottom="150dp"
        android:onClick="goToAnotherActivity2"
        android:enabled="false"
        android:text="@string/scanning"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/button4"
        android:layout_width="174dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginTop="50dp"
        android:layout_marginEnd="8dp"
        android:layout_marginRight="8dp"
        android:layout_marginBottom="20dp"
        android:onClick="goToAnotherActivity3"
        android:enabled="false"
        android:text="@string/gaining_and_maintaining_access"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/button5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginTop="180dp"
        android:layout_marginEnd="8dp"
        android:layout_marginRight="8dp"
        android:layout_marginBottom="8dp"
        android:onClick="goToAnotherActivity4"
        android:enabled="false"
        android:text="@string/report"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

This is the java code:

        package com.example.ProPentest;

        import android.content.Intent;
        import android.os.Bundle;
        import android.view.View;
        import android.widget.Button;

        import androidx.appcompat.app.AppCompatActivity;


        public class phase_list extends AppCompatActivity implements 
        View.OnClickListener {

        Button button2, button3, button4, button5;

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

            button2 = findViewById(R.id.button2);
            button3 = findViewById(R.id.button3);
            button4 = findViewById(R.id.button4);
            button5 = findViewById(R.id.button5);

            button2.setOnClickListener(this);

        }

        public void goToAnotherActivity1(View view) {
            Intent intent = new Intent(this, web_net.class);
            startActivity(intent);
        }

        public void goToAnotherActivity2(View view) {
            Intent intent = new Intent(this, web_net2.class);
            startActivity(intent);
        }

        public void goToAnotherActivity3(View view) {
            Intent intent = new Intent(this, webnet3.class);
            startActivity(intent);
        }

        public void goToAnotherActivity4(View view) {
            Intent intent = new Intent(this, report.class);
            startActivity(intent);
        }


        @Override
        public void onClick(View v) {
            if (v==button2){
                Intent myIntent = new Intent(phase_list.this, web_net.class);
                phase_list.this.startActivity(myIntent);
                button3.setEnabled(true);
                button4.setEnabled(false);
                button5.setEnabled(false);
            }

          if (v==button3) {
              Intent myIntent = new Intent(phase_list.this, web_net2.class);
              phase_list.this.startActivity(myIntent);
              button4.setEnabled(true);
              button5.setEnabled(false);
          }

            if (v==button4){
                Intent myIntent = new Intent(phase_list.this, webnet3.class);
                phase_list.this.startActivity(myIntent);
                button5.setEnabled(true);
        }
    }
}

The result should be like a process which user need to click the button step by step to enable the next button.

Answer 1

you defined both android:onClick and setOnClickListener to do different task simultaneously.I am not sure you can do it. I think you should manage it in a listener.

Answer 2

Just add setOnClickListener(this); for button3,4 and 5 after assigning the ids to the variables.

Like:- `

button2.setOnClickListener(this);
button3.setOnClickListener(this);
button4.setOnClickListener(this);
button5.setOnClickListener(this);`

Suggestion:- for better coding use switch statements inside onClick(View v) method for batter handling the particular button click.

Answer 3

Remove this section

@Override
public void onClick(View v) {
    if (v==button2){
        Intent myIntent = new Intent(phase_list.this, web_net.class);
        phase_list.this.startActivity(myIntent);
        button3.setEnabled(true);
        button4.setEnabled(false);
        button5.setEnabled(false);
    }

  if (v==button3) {
      Intent myIntent = new Intent(phase_list.this, web_net2.class);
      phase_list.this.startActivity(myIntent);
      button4.setEnabled(true);
      button5.setEnabled(false);
  }

    if (v==button4){
        Intent myIntent = new Intent(phase_list.this, webnet3.class);
        phase_list.this.startActivity(myIntent);
        button5.setEnabled(true);}
}

Update this section

 public void goToAnotherActivity1(View view) {
        Intent intent = new Intent(this, web_net.class);
        startActivity(intent);
    }

    public void goToAnotherActivity2(View view) {
        button3.setEnabled(true);
        button4.setEnabled(false);
        button5.setEnabled(false);
        Intent intent = new Intent(this, web_net2.class);
        startActivity(intent);

    }

    public void goToAnotherActivity3(View view) {
        button4.setEnabled(true);
        button5.setEnabled(false);
        Intent intent = new Intent(this, webnet3.class);
        startActivity(intent);
    }

    public void goToAnotherActivity4(View view) {
        button5.setEnabled(true);
        Intent intent = new Intent(this, report.class);
        startActivity(intent);
    }

Also i have notices that you just have implemented click listener programmatically only on button 2 in onCreate method so only call will return to onClick() overridden method for button 2

Answer 4

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

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

        Button button1 = findViewById(R.id.button1);
        Button button2 = findViewById(R.id.button2);
        Button button3 = findViewById(R.id.button3);
        Button button4 = findViewById(R.id.button4);
        Button button5 = findViewById(R.id.button5);

        button1.setOnClickListener(this);
        button2.setOnClickListener(this);
        button3.setOnClickListener(this);
        button4.setOnClickListener(this);
        button5.setOnClickListener(this);


    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.button1:

              // you can put your code hear. As per button SetEnabled and Intent
                Toast.makeText(this, "Button 1 clicked", Toast.LENGTH_SHORT).show();
                break;
            case R.id.button2:
                Toast.makeText(this, "Button 2 clicked", Toast.LENGTH_SHORT).show();
                break;
            case R.id.button3:
                Toast.makeText(this, "Button 3 clicked", Toast.LENGTH_SHORT).show();
                break;
            case R.id.button4:
                Toast.makeText(this, "Button 4 clicked", Toast.LENGTH_SHORT).show();
                break;
            case R.id.button5:
                Toast.makeText(this, "Button 5 clicked", Toast.LENGTH_SHORT).show();
                break;
        }
    }
}

Note: Remove in your xml file Button property android:onClick because in your code you Override the onClick method and goToAnotherActivity1/2/3/4 both are same thing.

I hope it'll help you...!