一旦显示得分，就关闭活动

Question

我有一个小测验，当“显示分数”按钮被点击后，用一个分数屏幕结束。然而，我想知道如何然后自动结束测试，并返回到我的主要活动后，得分已经显示了几秒钟。

public void showScore(View view) {
    // Calculate the number of correct answers after the "Show score" button is tapped.
    Button button = (Button) findViewById(R.id.score);
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            // Do your other functions //
            int score = calculateScore(answer1, answer2, answer3, answer4);
            // Convert the correct answer-to-question ratio to percentage.
            float percentage = score * 100 / 4;
            // Show the percentage score in a toast

            Toast.makeText(this, "Your score: " + percentage + "%", Toast.LENGTH_LONG).show();

            new Handler().postDelayed(new Runnable() {
                @Override
                public void run() {
                    Intent i = new Intent(EmotionsActivity.this, ActivitiesActivity.class);
                    startActivity(i);
                    finish(); // closes after score has been shown
                }
            }, 2000); // Set your time here //
        }
    });

错误：

error: no suitable method found for makeText(<anonymous 
OnClickListener>,String,int)
method Toast.makeText(Context,CharSequence,int) is not applicable
(argument mismatch; <anonymous OnClickListener> cannot be converted to 
Context)
method Toast.makeText(Context,int,int) is not applicable
(argument mismatch; <anonymous OnClickListener> cannot be converted to Context)

Answer 1

在按钮上使用postDelayed，单击并使用意图更改活动。示例：

Button button = (Button) findViewById(R.id.score);
 button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                // Do your other functions //
                new Handler().postDelayed(new Runnable() {
                    @Override
                    public void run() {
            Intent i = new Intent(ActivityQuiz.this, MainActivity.class);
            startActivity(i);
            finish();
                    }
                }, 5000); // Set your time here //
            }
        });

Answer 2

使用postDelayed of https://developer.android.com/reference/android/os/Handler类来对活动调用finish()。