Android MainActivity界面跳转详解：TextView与Button示例

package com.example.myfrist;

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

public class MainActivity extends AppCompatActivity {

    private Button mBtnTextView;
    private Button mBtnButton;
    private Button getmBtnTextView;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mBtnTextView = (Button) findViewById(R.id.btn_textview);//alt+enter快捷键转换
        mBtnTextView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //跳转到TextView演示界面
                Intent intent = new Intent(MainActivity.this,TextViewActivity.class);
                startActivity(intent);
            }
        });
        mBtnButton = (Button) findViewById(R.id.btn_button);
        mBtnButton.setOnClickListener(new View.OnClickListener() {