Question

我制作了一个简单的测验应用程序，其中包含10个问题，每个问题有10秒倒数计时器，这意味着我有10个问题活动。评分有效，而每个问题的答案正确地乘以CountDownTimer方法的剩余时间，因此它将是：score = answer * timeLeft;在活动10之后活动结束时，总得分将打印在ResultActivity上。问题是我无法通过每个活动传递得分变量，当我单击从活动10到ResultActivity的意图的下一个按钮时，ResultActivity无法打开或强制关闭。这是我的代码：

TestActivity1

package com.finalproject.logicaltest;

import android.content.Intent;
import android.os.CountDownTimer;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.CompoundButton;
import android.widget.RadioButton;
import android.widget.TextView;

import java.util.Timer;

import butterknife.ButterKnife;
import butterknife.Bind;

import static android.R.id.message;
import static android.R.string.cancel;
import static com.finalproject.logicaltest.R.id.rb1;
import static com.finalproject.logicaltest.R.id.rb2;
import static com.finalproject.logicaltest.R.id.rb3;
import static com.finalproject.logicaltest.R.id.rb4;


public class TestActivity1 extends AppCompatActivity {

    @Bind(R.id.rb1) RadioButton rB1;
    @Bind(R.id.rb2) RadioButton rB2;
    @Bind(R.id.rb3) RadioButton rB3;
    @Bind(R.id.rb4) RadioButton rB4;
    @Bind(R.id.next) Button bNext;
    @Bind(R.id.timer) TextView cDown;

    public int answer = 0;
    public int score = 0;
    public long timeLeft = 0;
    //The number of milliseconds in the future from
    //the call to start() until the countdown is done
    public long millisInFuture = 11000; //11 seconds
    //The interval along the way to receive onTick(long) callbacks
    long countDownInterval = 1000; //1 second

    public long millisUntilFinished;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test1);
        ButterKnife.bind(this);

        setTimer();

    }

    public void setTimer() {

        //Initialize a new CountDownTimer instance
       final CountDownTimer timer = new CountDownTimer(millisInFuture,countDownInterval){
            public void onTick(long millisUntilFinished){
                //do something in every tick
                //Display the remaining seconds to app interface
                //1 second = 1000 milliseconds
                cDown.setText("" + millisUntilFinished / 1000);
                timeLeft = millisUntilFinished / 1000;

            }
            public void onFinish(){
                //Do something when count down finished
                cDown.setText("NEXT!");
                Intent intent = new Intent(TestActivity1.this,TestActivity2.class);
                intent.putExtra("score", score);
                startActivity(intent);
                finish();
                timeLeft = 0;
            }


        }.start();

        bNext.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {

                timer.cancel();
                timeLeft = millisUntilFinished;
                Intent intent = new Intent(TestActivity1.this,TestActivity2.class);
                intent.putExtra("score", score);
                startActivity(intent);
                finish();
                overridePendingTransition(R.anim.fade_in, R.anim.fade_out);

            }

        });

    }

    public void onRadioButtonClicked (View v) {

        boolean checked = ((RadioButton) v).isChecked();

        switch (v.getId()) {

            case rb1:
                if (checked){
                    answer++;
                    break;
                }

            case rb2:
                if (checked){
                    answer = 0;
                    break;
                }

            case rb3:
                if (checked){
                    answer = 0;
                    break;
                }

            case rb4:
                if (checked){
                    answer = 0;
                    break;
                }
        }

        score = ((int)(timeLeft) * Integer.valueOf(answer));

    }




}

它通过TestActivity2通过putExtra传递得分，直到TestActivity10像这样：

package com.finalproject.logicaltest;

/**
 * Created by VICKY on 19-May-17.
 */

import android.app.Activity;
import android.content.Intent;
import android.os.CountDownTimer;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.TypedValue;
import android.view.View;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.TextView;

import butterknife.ButterKnife;
import butterknife.Bind;

import static com.finalproject.logicaltest.R.id.rb1;
import static com.finalproject.logicaltest.R.id.rb2;
import static com.finalproject.logicaltest.R.id.rb3;
import static com.finalproject.logicaltest.R.id.rb4;
import static com.finalproject.logicaltest.R.id.rb5;

public class TestActivity10 extends AppCompatActivity {

    @Bind(rb1) RadioButton rB1;
    @Bind(rb2) RadioButton rB2;
    @Bind(rb3) RadioButton rB3;
    @Bind(rb4) RadioButton rB4;
    @Bind(rb5) RadioButton rB5;
    @Bind(R.id.end) Button bEnd;
    @Bind(R.id.timer) TextView cDown;

    public int answer = 0;
    public int score = 0;
    public long timeLeft = 0;
    //The number of milliseconds in the future from
    //the call to start() until the countdown is done
    public long millisInFuture = 11000; //11 seconds
    //The interval along the way to receive onTick(long) callbacks
    long countDownInterval = 1000; //1 second

    public long millisUntilFinished;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test10);
        ButterKnife.bind(this);
        score = getIntent().getExtras().getInt("score");

        setTimer();
    }

    public void setTimer() {


        //Initialize a new CountDownTimer instance
        final CountDownTimer timer = new CountDownTimer(millisInFuture,countDownInterval){
            public void onTick(long millisUntilFinished){
                //do something in every tick
                //Display the remaining seconds to app interface
                //1 second = 1000 milliseconds
                cDown.setText("" + millisUntilFinished / 1000);
                timeLeft = millisUntilFinished / 1000;
            }
            public void onFinish(){
                //Do something when count down finished
                cDown.setText("NEXT!");
                Intent intent = new Intent(TestActivity10.this,ResultActivity.class);
                intent.putExtra("score", score);
                startActivity(intent);
                finish();
                timeLeft = 0;
            }
        }.start();


        bEnd.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                timer.cancel();
                timeLeft = millisUntilFinished;
                Intent intent = new Intent(TestActivity10.this,ResultActivity.class);
                intent.putExtra("score", score);
                startActivity(intent);
                finish();
                overridePendingTransition(R.anim.fade_in, R.anim.fade_out);
            }

        });
    }

    public void onRadioButtonClicked (View v) {

        boolean checked = ((RadioButton) v).isChecked();

        switch (v.getId()) {

            case rb1:
                if (checked){
                    answer = 0;
                    break;
                }

            case rb2:
                if (checked){
                    answer++;
                    break;
                }

            case rb3:
                if (checked){
                    answer = 0;
                    break;
                }

            case rb4:
                if (checked){
                    answer = 0;
                    break;
                }

            case rb5:
                if (checked){
                    answer = 0;
                    break;
                }
        }

        score += ((int)(timeLeft) * Integer.valueOf(answer));

    }




}

并在ResultActivity上打印总分：

package com.finalproject.logicaltest;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;

import static android.R.id.message;


public class ResultActivity extends AppCompatActivity {
    public int score = 0;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_result);
        score = getIntent().getExtras().getInt("score");
        TextView result = (TextView) findViewById(R.id.total_score);
        result.setText(score);
    }
}

我的代码出了什么问题？

Answer 1

你可以使用应用程序类，在Application类中保存得分值，可以从任何你想要的类访问。（因为你只需要保存得分值。）你可以获得更多信息检查here

希望有所帮助......

Answer 2

你好试试这个代码可能有所帮助，根据你的逻辑使用

声明和初始化

SharedPreferences sharedpreferences;
sharedpreferences = getSharedPreferences("results", Context.MODE_PRIVATE);

存储您在其他活动中使用的分数

SharedPreferences.Editor editor = sharedpreferences.edit();
            editor.putString("score", score);
            editor.commit();

检索存储的数据

SharedPreferences prefs = this.getSharedPreferences("results", Context.MODE_PRIVATE);
String lanSettings = prefs.getString("score", null);

Answer 3

IMO 您将score设置为TextView，这是不正确的。设置如下：

result.setText(String.valueOf(score));

或者像这样：

result.setText(" "+score);

看看是否有效。

将可变分数从一个活动传递到另一个活动

3 个答案: