Android Studio同时监听多个Button实现activity跳转

　　　MainActivity.java：

package com.example.test;

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

import androidx.appcompat.app.AppCompatActivity;


public class MainActivity extends AppCompatActivity {

     Button mBtnTextView1;
     Button mBtnTextView2;
    Intent intent1,intent2;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mBtnTextView1 = findViewById(R.id.btnTextView1);
        mBtnTextView1.setOnClickListener(new ButtonListener());
        mBtnTextView2 = findViewById(R.id.btnTextView2);
        mBtnTextView2.setOnClickListener(new ButtonListener());
    };

    private class ButtonListener implements View.OnClickListener{
        @Override
        public void onClick(View v) {
            switch (v.getId()){
                case R.id.btnTextView1:
                    intent1 = new Intent(MainActivity.this,TestTextViewActivity1.class);
                    startActivity(intent1);
                    break;
                case R.id.btnTextView2:
                    intent2 = new Intent(MainActivity.this,TestTextViewActivity2.class);
                    startActivity(intent2);
                    break;
            }

        }
    }
}

　　

　　activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    >

    <Button
        android:id="@+id/btnTextView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="TestTextView1" />

    <Button
        android:id="@+id/btnTextView2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="TestTextView2"/>

</LinearLayout>

　　TestTextViewActivity1.java:

package com.example.test;

import android.graphics.Paint;
import android.os.Bundle;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

public class TestTextViewActivity1 extends AppCompatActivity {

    private TextView mtv1;
    private TextView mtv2;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_text_view1);
        mtv1 = findViewById(R.id.ttv1);
    }
}

　　activity_text_view1.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    >

    <TextView
        android:id="@+id/ttv1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="This is a test"
        android:textColor="#5500FF"
        android:textSize="32sp"
        android:padding="10dp"
        />

</LinearLayout>

　　

　　TestTextViewActivity2.java:

package com.example.test;

import android.graphics.Paint;
import android.os.Bundle;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

public class TestTextViewActivity2 extends AppCompatActivity {

    private TextView mtv2;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_text_view2);
        mtv2 = findViewById(R.id.ttv2);
    }
}

　　activity_text_view2.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    >

    <TextView
        android:id="@+id/ttv2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Hello everybody"
        android:textColor="#E91E63"
        android:textSize="32sp"
        android:padding="10dp"
        />

</LinearLayout>

注意在AndroidMainifest.xml中添加

<activity android:name=".TestTextViewActivity1"/>
<activity android:name=".TestTextViewActivity2"/>