java - 如何使用按钮结束处理程序并更改 Activity ？

Question

您好，我是一名大学生，具有 html 和 JavaScript 背景，使这个应用程序作为工作的副项目。我希望通过按下按钮提前结束倒计时，同时将用户带到另一项 Activity 。我使用了两种不同的指南来组装我的代码，并且计时器正在工作。我对java的了解有限，所以欢迎任何帮助，这是我的代码:

public class Main2Activity extends AppCompatActivity {

    Button button1;

    int flag=0;

    // page should show up for 2 seconds then take you to the main page, but I want a button there to stop the count down and take the user to a different page That I will use as a credits page

    private static int TIME_OUT = 2000; //Time to launch the another activity

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


        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                Intent i = new Intent(Main2Activity.this, MainActivity.class); //Main2Activity is the Welcome page and MainActivity is the home page
                startActivity(i);
                finish();

            }

        }, TIME_OUT);
        button1 = (Button) findViewById(R.id.credit);
        button1.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                flag = 1;
                Handler.removeCallbacksAndMessages(null);
                Intent intent = new Intent(Main2Activity.this, credit.class);
                startActivity(intent);
            }
        });
    }
}

Answer 1

您应该声明一个全局处理程序并在任何地方使用它。不要在处理程序中使用final

Handler handler;
private static int TIME_OUT = 2000; //Time to launch the another activity

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

handler.postDelayed(new Runnable() {
    @Override
    public void run() {
        Intent i = new Intent(Main2Activity.this, MainActivity.class); //Main2Activity is the Welcome page and MainActivity is the home page
        startActivity(i);
        finish();

    }

}, TIME_OUT);
button1 = (Button) findViewById(R.id.credit);
button1.setOnClickListener(new View.OnClickListener() {

    @Override
    public void onClick(View v) {
        flag = 1;
        handler.removeCallbacksAndMessages(null);
        Intent intent = new Intent(Main2Activity.this, credit.class);
        startActivity(intent);
    }
  });
}