1.佈局檔案

<?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"
    android:background="@mipmap/ic_launcher"
    tools:context="yangfan.bwie.com.jdpractise.MainActivity">
    <TextView
        android:text="跳轉"
        android:id="@+id/tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_marginRight="20dp"
        android:layout_marginTop="10dp"
        android:textSize="20sp" />

</android.support.constraint.ConstraintLayout>
 

2.MainActivity類 --寫程式碼之前建立第二個Acitvity

import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.WindowManager;
import android.widget.TextView;

import java.util.Timer;
import java.util.TimerTask;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    /**
     * 跳轉
     */
     private TextView mTv;
     private Handler handler;
    private Runnable runnable;

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



        setContentView(R.layout.activity_main);
        initView();
        handler = new Handler();
        handler.postDelayed(runnable=new Runnable() {
            @Override
            public void run() {
                Intent intent=new Intent(MainActivity.this,Main2Activity.class);
                startActivity(intent);
               finish();

            }
        },3000);

    }

    private void initView() {
        mTv = (TextView) findViewById(R.id.tv);
        mTv.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            default:
                break;
            case R.id.tv:
                Intent intent=new Intent(MainActivity.this,Main2Activity.class);
                startActivity(intent);
                finish();
                //對點選的按鈕進行判斷，如果點選完成則停止自動跳轉（不然會跳轉2次）
                if (runnable!=null){
                    handler.removeCallbacks(runnable);
                }
                break;
        }
    }
}