Question

我有一个按钮在我想要时不可见的问题。在我的if语句中，我已经将exerciseButtonDone声明为首先不可见，但在最后的倒计时之后，我希望它变得可见。

正如我的代码现在一样，按钮始终可见。

package org.example.anders.eazy;

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.app.Activity;
import android.os.CountDownTimer;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.os.Vibrator;
import java.util.concurrent.TimeUnit;

public class ExerciseActivity extends Activity {

    String[] exerciseList;
    TextView textTimer,workoutTextview,exerciseTextView;
    int setsChosen;
    int counter = 0;
    int timeChosen;
    boolean togglebuttonpress;
    Button exerciseButtonDone;
    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        exerciseList = getResources().getStringArray(R.array.heavy_chest_arms);

        setContentView(R.layout.activity_exercise);
        exerciseButtonDone=(Button)findViewById(R.id.buttonActiveExcercise);
        Intent intent = getIntent();
        String selectedWorkout = intent.getExtras().getString("workoutName");
        togglebuttonpress=intent.getExtras().getBoolean("togglebuttonPress");

        textTimer = (TextView) findViewById(R.id.timeUntilFinished);
        //workoutTextview = (TextView) findViewById(R.id.workoutChosen);
        //workoutTextview.setText(selectedWorkout);
        if(togglebuttonpress){
            exerciseButtonDone.setVisibility(View.INVISIBLE);
            setsChosen =intent.getExtras().getInt("setsChosen");
            int timePass = intent.getExtras().getInt("timeChosen");
            timeChosen=timePass;
            counter = 0;
            runCountDownTimer();
            exerciseButtonDone.setVisibility(View.VISIBLE);
        }

        else {

            textTimer.setText("");
            exerciseButtonDone.setVisibility(View.VISIBLE);
        }


        //exerciseTextView= (TextView) findViewById(R.id.exerciseNow);
        //exerciseTextView.setText(exerciseList[i]);

    }

    public void runCountDownTimer() {

        if (counter < setsChosen) {
            new CountDownTimer(timeChosen * 60000, 1000) {

                @Override
                public void onTick(long millisUntilFinished) {
                    long millis = millisUntilFinished;
                    String hms = String.format("%02d:%02d",
                            TimeUnit.MILLISECONDS.toMinutes(millis) - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(millis)),
                            TimeUnit.MILLISECONDS.toSeconds(millis) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millis)));
                    System.out.println(hms);
                    textTimer.setText(hms);
                }

                @Override
                public void onFinish() {
                    Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
                    counter++;
                    v.vibrate(500);
                    runCountDownTimer();
                }
            }.start();
        }
        textTimer.setText("Complete");

    }
}

Answer 1

您正在设置按钮不可见，然后立即可见。

    if(togglebuttonpress){
        exerciseButtonDone.setVisibility(View.INVISIBLE);
        ...
        exerciseButtonDone.setVisibility(View.VISIBLE);
    }

将exerciseButtonDone.setVisibility(View.VISIBLE);从当前位置移至倒数计时器实际完成的位置，我现在看到的是runCountDownTimer()

if (counter < setsChosen) {
    new CountDownTimer(timeChosen * 60000, 1000) {
        ...
    }
} else {
    exerciseButtonDone.setVisibility(View.VISIBLE);
}

你仍然需要制作execerciseButtonDone final ...并将其移至合适的范围，谢谢alex。它需要是一个类变量，而不是boolean togglebuttonpress;

你可以再次findViewById，但那是多余的和不必要的。

Answer 2

我添加了一个if语句，检查循环是否完成。它奏效了。

public void onFinish() {
                    Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
                    counter++;
                    v.vibrate(500);
                    runCountDownTimer();
                    if (counter == setsChosen)
                    {
                        exerciseButtonDone.setVisibility(View.VISIBLE);
                    }
                }

希望按钮在隐身后可见

2 个答案: