Question

如何向活动添加计时器并将其值转发到下一个活动？

我的ShuffleButtons.class中有一个计时器但是当我转到下一个活动ShuffleButtons1.class时，计时器值从零开始。有人可以告诉我如何将计时器值传递给下一个活动吗？

以下是我的代码：

import java.util.ArrayList;
import java.util.Collections;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.SystemClock;
import android.view.Gravity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

public class ShuffleButtons extends Activity {

int id = 1;
static Toast button_press;
int a = 0;
private TextView timerValue;

private long startTime = 0L;

private Handler customHandler = new Handler();

long timeInMilliseconds = 0L;
long timeSwapBuff = 0L;
long updatedTime = 0L;


@SuppressLint("ShowToast")
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView( R.layout.shuffle );

    timerValue = (TextView) findViewById(R.id.timerValue);

    button_press= Toast.makeText(this, "1 Presssed", Toast.LENGTH_SHORT);


  //create another two linear layouts which will host 5 buttons horizontally
    LinearLayout top_compte = (LinearLayout)findViewById(R.id.top_compte);
    LinearLayout bottom_calculator = (LinearLayout)findViewById(R.id.bottom_calculator);

    // Create an ArrayList to hold the Button objects that we will create    
    ArrayList<Button> buttonList = new ArrayList<Button>();

    // Create the Buttons, set their text as numeral value of the index variable    
    for (int i = 0; i < 4; i++) {
        final Button b = new Button(this);
        b.setText("" + (i+1));
        b.setGravity(Gravity.CENTER_HORIZONTAL);


        b.setId(i+1);                    // Set an id to Button

        b.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                dealWithButtonClick(b);
            }

            public void dealWithButtonClick(Button b) {
                 switch(b.getId()) {
                  case 1: 
                      if (a==0) {
                          startTime = SystemClock.uptimeMillis();
                            customHandler.postDelayed(updateTimerThread, 0);
                              a=1;
                      }
                      button_press.setText("1 Pressed");
                        button_press.show();

                    break;
                case 2:
                    if (a==1) {
                          a=2;
                         button_press.setText("2 Pressed");
                            button_press.show();
                  }else {
                      button_press.setText("You Pressed the wrong button");
                        button_press.show();

                  }

                    break;
                case 3:
                    if (a==2) {
                          a=3;
                         button_press.setText("3 Pressed");
                            button_press.show();
                  }else {
                      button_press.setText("You Pressed the wrong button");
                        button_press.show();

                  }

                     break;
                case 4: 
                    if (a==3) {
                        timeSwapBuff += timeInMilliseconds;
                        customHandler.removeCallbacks(updateTimerThread);
                          a=4;
                         button_press.setText("Good Going");
                            button_press.show();

// here i move on from ShuffleButtons.class to ShuffleButtons1.class


                Intent intent = new Intent(getApplicationContext(),ShuffleButtons1.class);
                        startActivity(intent);
                        finish();
                  }else {
                      button_press.setText("You Pressed the wrong button");
                        button_press.show();

                  }

                    break;

                      }

            }            
        });
        buttonList.add(b);
    }

    // Shuffle    
    Collections.shuffle(buttonList);


    for (int i = 0; i < 4; i++) {

        // Add the first five Buttons to top_compte
        // Add the last five Buttons to bottom_calculator
        if (i < 2) {
            top_compte.addView(buttonList.get(i));
        } else {
            bottom_calculator.addView(buttonList.get(i));
        }
    }
}   

 // Generates and returns a valid id that's not in use
public int generateUniqueId(){  
    View v = findViewById(id);  
    while (v != null){  
        v = findViewById(++id);  
    }  
    return id++;  
}

private Runnable updateTimerThread = new Runnable() {

    public void run() {

        timeInMilliseconds = SystemClock.uptimeMillis() - startTime;

        updatedTime = timeSwapBuff + timeInMilliseconds;

        int secs = (int) (updatedTime / 1000);
        int mins = secs / 60;
        secs = secs % 60;
        int milliseconds = (int) (updatedTime % 1000);
        timerValue.setText("" + mins + ":"
                + String.format("%02d", secs) + ":"
                + String.format("%03d", milliseconds));
        customHandler.postDelayed(this, 0);
    }

};

}

Answer 1

不要通过你的计时器。

在单独的服务中启动计时器，这意味着让它在后台运行。

使用Singleton模式或自定义Application类使全局访问计时器。

然后随时随地访问它。

这是更聪明的方法。如果您不熟悉Android服务组件，请参阅this。

添加计时器并将其值转发到下一个活动

1 个答案: