Android-单击而不是前进可返回上一页

Question

I use Android Studio, created four new activity each button. I try every button leads to the next page. After I attach all the buttons I run the app and it really works. When I press the button on the first page it takes me to the second page, but when I press the button on the second page to go to the third, it takes me back to the first page.

first activity:

 package liranbenzino.kids;
 import android.content.Intent;
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
 import android.view.View;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    findViewById(R.id.button).setOnClickListener(new View.OnClickListener()    {
        @Override
        public void onClick(View viewBtnClick) {
            // link to class
            Intent intent = new Intent(MainActivity.this,Main2Activity.class);
            startActivity(intent);


        }});
}}

second activity:

package liranbenzino.kids;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;

public class Main2Activity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main2);

    findViewById(R.id.button2).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View viewBtnClick1) {
            // link to class
            Intent intent = new Intent(Main2Activity.this,Main3Activity.class);
            startActivity(intent);


        }});
}
}

thied activity:

package liranbenzino.kids;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;

public class Main3Activity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main3);

    findViewById(R.id.button3).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View viewBtnClick) {
            // link to class
            Intent intent = new Intent(Main3Activity.this,Main4Activity.class);
            startActivity(intent);


        }});
}
}

four activity:

package liranbenzino.kids;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Toast;
import android.view.View;
public class Main4Activity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main4);


    findViewById(R.id.button4).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View viewBtnClick) {
            Toast.makeText(Main4Activity.this,"NAME", Toast.LENGTH_LONG).show();


}});
}}

AndroidMenifest.xml :

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="liranbenzino.kids">
<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>
    <activity android:name=".Main2Activity" />
    <activity android:name=".Main3Activity" />
    <activity android:name=".Main4Activity"></activity>
</application>

</manifest>

thank'S

Answer 1

Your code is ok

How your decide that you back to firstPage when your click 2nd activity button. your code is ok.. use label in each page. then try ...

May be your some button label is same and you become confuse in which page you are in..

You can change your button label as First_Page_Button,Second_Page_Button,Third_Page_Button etc to decide in which page you are...

Answer 2

in each activity change the INTENT name for example in activity2 change Intent intent = new Intent(Main2Activity.this,Main3Activity.class); startActivity(intent); to Intent intent2 = new Intent(Main2Activity.this,Main3Activity.class); startActivity(intent2);