Android Studio click the button to jump to a new interface

Problem description

First, we have two Java files and the XML files bound to them. Here, take history activity.Java, activity_history.xml and event detail.Java, activity_event_detail.xml as examples. We want to add a button in the history activity interface, and click to jump to the event detail interface.

Add button for HistoryActivity interface

In its corresponding activity_history.xml:

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".HistoryActivity">

    <Button
        android:id="@+id/History"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Historical Event"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"/>
</android.support.constraint.ConstraintLayout>

We use the android:id="@+id/History" statement to say that the button's ID is set to History, which is used later when setting the click event.

Add a click event for the History button

In HistoryActivity.java:

package com.example.xff.tm;

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

public class HistoryActivity extends AppCompatActivity {
    Button button = null;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_history);
        button = (Button)findViewById(R.id.History);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent();
                intent.setClass(HistoryActivity.this,EventDetail.class);
                startActivity(intent);
            }
        });
    }

}

Find the corresponding button through the id of the previously defined button, and set click listening for it. When a click event occurs, jump through Intent.
#Add activity in manifests - > androidmanifest.xml (this step is usually generated automatically after adding click event, which can be checked)

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

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

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

</manifest>

EventDetail.java，activity_event_detail.xml

As the jump interface, these two files only need to complete their own functions:
EventDetail.java:

package com.example.xff.tm;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class EventDetail extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_event_detail);
    }
}

activity_event_detail.xml:

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".EventDetail">
    
</android.support.constraint.ConstraintLayout>