如何使用布尔值来停止线程？

时间：2013-11-21 09:17:19

标签： android multithreading

我希望应用程序线程在onclick和ondestroy中停止，意味着我希望线程在单击按钮时停止并且当我退出应用程序时，现在线程不会停止，即使我退出它...我应该放在哪里我的同时（！关机）？对不起，我对你很感兴趣..非常感谢你的帮助

    package com.example.suntracking;

import java.util.Calendar;

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.os.Handler;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends Activity implements View.OnClickListener{
    //showing input and output
    TextView aziangle,elevation,numberof,rightasc,decli,hourangle,solartime,showinlat,showinlong,
    showintimezone,showindlst,showinofftime,showinoffazi,showinoffele,showinoffphi,showinofflamda,showinoffxi,
    showdate,showtime,showday;

    Button editting;
    Float latval,longval,offtimeval,offazival,offeleval,offphival,offlamdaval,offxival;
    int timeval,taketimesec,taketimeminute,taketimehour,takedateday,takedatemonth,takedateyear;
    String show1,show2,show3,show4,sshowday,takeampmtext;
    //for clock
    int timesec,timeminute,timehour,dateday,datemonth,dateyear,day,ampm;
    String daytext,ampmtext,showazi,showele,shownoday,showra,showdecli,showh_angle,shows_time;
    Handler mHandler = new Handler();
    Thread r;
    volatile boolean shutdown = false;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initialize();
        loadSavedpreferences();
        r = new Thread(new Runnable(){
            @Override
            public void run() { 
                // TODO Auto-generated method stub
                while (true) {
                    try {
                        Thread.sleep(1000);
                        mHandler.post(new Runnable() {

                            @Override
                            public void run() {
                                // TODO Auto-generated method stub
                                // Write your code here to update the UI.
                               Save_fetchPref();
                               run_cal();

                            }

                            private void run_cal() {
                                // TODO Auto-generated method stub
                                Intent j=new Intent(MainActivity.this,Calculation.class);
                                startActivity(j);
                            }

                            private void Save_fetchPref() {
                                // TODO Auto-generated method stub
                                    Calendar c = Calendar.getInstance();
                                            timesec = c.get(Calendar.SECOND);
                                            timeminute = c.get(Calendar.MINUTE);
                                            timehour = c.get(Calendar.HOUR_OF_DAY);
                                            ampm = c.get(Calendar.AM_PM);
                                            if(ampm==0){
                                                ampmtext="AM";
                                            }else {
                                                ampmtext="PM";
                                            }
                                            dateday = c.get(Calendar.DAY_OF_MONTH);
                                            datemonth = c.get(Calendar.MONTH);
                                            datemonth += 1;
                                            dateyear = c.get(Calendar.YEAR);
                                            day = c.get(Calendar.DAY_OF_WEEK);
                                            switch(day){
                                            case 1:
                                                daytext="SUNDAY";
                                                break;
                                            case 2:
                                                daytext="MONDAY";
                                                break;
                                            case 3:
                                                daytext="TUESDAY";
                                                break;
                                            case 4:
                                                daytext="WEDNESDAY";
                                                break;
                                            case 5:
                                                daytext="THURSDAY";
                                                break;
                                            case 6:
                                                daytext="FRIDAY";
                                                break;
                                            case 7:
                                                daytext="SATURDAY";
                                                break;
                                            }
                                            savePreferences();
                                            loadSavedpreferences();
                            }
                        });
                    } catch (Exception e) {
                        // TODO: handle exception
                    }
                }
                }
        });
        r.start();
    }




    private void savePreferences() {
        // TODO Auto-generated method stub
        SharedPreferences savedata = getSharedPreferences("savealldata",0);
        Editor editor=savedata.edit();
        editor.putInt("timesec",timesec);
        editor.putInt("timeminute", timeminute);
        editor.putInt("timehour", timehour);
        editor.putInt("dateday", dateday);
        editor.putInt("datemonth", datemonth);
        editor.putInt("dateyear", dateyear);
        editor.putInt("ampm", ampm);
        editor.putString("daytext", daytext);
        editor.putString("ampmtext", ampmtext);
        editor.commit();
    }


    private void initialize() {
        // TODO Auto-generated method stub
        aziangle=(TextView)findViewById(R.id.tvAziAngle);
        elevation=(TextView)findViewById(R.id.tvElevation);
        numberof=(TextView)findViewById(R.id.tvNumberof);
        rightasc=(TextView)findViewById(R.id.tvRightAsc);
        decli=(TextView)findViewById(R.id.tvDecli);
        hourangle=(TextView)findViewById(R.id.tvHourAngle);
        solartime=(TextView)findViewById(R.id.tvSolarTime);
        showday=(TextView)findViewById(R.id.tvDay);
        showdate=(TextView)findViewById(R.id.tvDate);
        showtime=(TextView)findViewById(R.id.tvTime);
        showinlat=(TextView)findViewById(R.id.tvShowInLat);
        showinlong=(TextView)findViewById(R.id.tvShowInLong);
        showintimezone=(TextView)findViewById(R.id.tvShowInTimeZone);
        showindlst=(TextView)findViewById(R.id.tvShowInDLST);
        showinofftime=(TextView)findViewById(R.id.tvShowInOffTime);
        showinoffazi=(TextView)findViewById(R.id.tvShowInOffAzimuth);
        showinoffele=(TextView)findViewById(R.id.tvShowInOffElevation);
        showinoffphi=(TextView)findViewById(R.id.tvShowInOffphi);
        showinofflamda=(TextView)findViewById(R.id.tvShowInOfflamda);
        showinoffxi=(TextView)findViewById(R.id.tvShowInOffxi);
        editting=(Button)findViewById(R.id.bedit);
        editting.setOnClickListener(this);
        }


    private void loadSavedpreferences() {
        // TODO Auto-generated method stub
        SharedPreferences savedata= getSharedPreferences("savealldata",0);
        //input
        sshowday=savedata.getString("daytext",null);
        showday.setText(sshowday);

        takedateday=savedata.getInt("dateday",00);
        takedatemonth=savedata.getInt("datemonth", 00);
        takedateyear=savedata.getInt("dateyear", 00);
        showdate.setText(takedateday + "/" + takedatemonth + "/" + takedateyear);

        taketimesec=savedata.getInt("timesec", 00);
        taketimeminute=savedata.getInt("timeminute", 00);
        taketimehour=savedata.getInt("timehour", 00);
        takeampmtext=savedata.getString("ampmtext", "AM");
        showtime.setText(taketimehour + ":" + taketimeminute + ":" + taketimesec + takeampmtext);

        show1=savedata.getString("show1",null);
        latval=savedata.getFloat("latval", 0);
        showinlat.setText("Latitude : " + latval + ", " + show1);

        show2=savedata.getString("show2",null);
        longval=savedata.getFloat("longval",0);
        showinlong.setText("Longitude : " + longval + ", " + show2);

        show3=savedata.getString("show3",null);
        timeval=savedata.getInt("timezoneval",0);
        showintimezone.setText("Time Zone : " + timeval + show3);

        show4=savedata.getString("show4","No");
        showindlst.setText("Daylight Saving Time : "+ show4);

        offtimeval=savedata.getFloat("show5",0);
        showinofftime.setText("Offset Time : " + offtimeval);

        offazival=savedata.getFloat("show6",0);
        showinoffazi.setText("Offset Azimuth : "+ offazival);

        offeleval=savedata.getFloat("show7",0);
        showinoffele.setText("Offset Elevation : " + offeleval);

        offphival=savedata.getFloat("show8", 0);
        showinoffphi.setText("Offset Φ :" + offphival);

        offlamdaval=savedata.getFloat("show9", 0);
        showinofflamda.setText("Offset λ : "+offlamdaval);

        offxival=savedata.getFloat("show10", 0);
        showinoffxi.setText("Offset ξ : "+ offxival);
        //output
        showazi=savedata.getString("azimuth", null);
        aziangle.setText("Azimuth Angle : " + showazi);

        showele=savedata.getString("elevation", null);
        elevation.setText("Elevation Angle" + showele);

        shownoday=savedata.getString("jd", null);
        numberof.setText("Number of Days : " + shownoday);

        showra=savedata.getString("RA", null);
        rightasc.setText("Right Ascension : " + showra);

        showdecli=savedata.getString("declination", null);
        decli.setText("Declination Angle : " + showdecli);

        showh_angle=savedata.getString("h_angle", null);
        hourangle.setText("Hour Angle : " + showh_angle);

        shows_time=savedata.getString("s_time", null);
        solartime.setText("Solar Time : " + shows_time);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        shutdown = true;
        Intent e=new Intent(MainActivity.this, Parameterlist.class);
        startActivity(e);
    }
    @Override
    protected void onDestroy() {
        // TODO Auto-generated method stub
        super.onDestroy();
        shutdown = true ; 
    }


}

编辑：

    package com.example.suntracking;

import java.util.Calendar;

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.os.Handler;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends Activity implements View.OnClickListener{
    //showing input and output
    TextView aziangle,elevation,numberof,rightasc,decli,hourangle,solartime,showinlat,showinlong,
    showintimezone,showindlst,showinofftime,showinoffazi,showinoffele,showinoffphi,showinofflamda,showinoffxi,
    showdate,showtime,showday;

    Button editting;
    Float latval,longval,offtimeval,offazival,offeleval,offphival,offlamdaval,offxival;
    int timeval,taketimesec,taketimeminute,taketimehour,takedateday,takedatemonth,takedateyear;
    String show1,show2,show3,show4,sshowday,takeampmtext;
    //for clock
    int timesec,timeminute,timehour,dateday,datemonth,dateyear,day,ampm;
    String daytext,ampmtext,showazi,showele,shownoday,showra,showdecli,showh_angle,shows_time;
    Handler mHandler = new Handler();
    Thread t;
    volatile boolean shutdown = false;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initialize();
        loadSavedpreferences();
        t = new Thread(new Runnable(){
            @Override
            public void run() { 
                // TODO Auto-generated method stub
                while (!shutdown) {
                    try {
                        Thread.sleep(1000);
                        mHandler.post(new Runnable() {

                            @Override
                            public void run() {
                                // TODO Auto-generated method stub
                                // Write your code here to update the UI.
                               Save_fetchPref();
                               run_cal();

                            }

                            private void run_cal() {
                                // TODO Auto-generated method stub
                                Intent j=new Intent(MainActivity.this,Calculation.class);
                                startActivity(j);
                            }

                            private void Save_fetchPref() {
                                // TODO Auto-generated method stub
                                    Calendar c = Calendar.getInstance();
                                            timesec = c.get(Calendar.SECOND);
                                            timeminute = c.get(Calendar.MINUTE);
                                            timehour = c.get(Calendar.HOUR_OF_DAY);
                                            ampm = c.get(Calendar.AM_PM);
                                            if(ampm==0){
                                                ampmtext="AM";
                                            }else {
                                                ampmtext="PM";
                                            }
                                            dateday = c.get(Calendar.DAY_OF_MONTH);
                                            datemonth = c.get(Calendar.MONTH);
                                            datemonth += 1;
                                            dateyear = c.get(Calendar.YEAR);
                                            day = c.get(Calendar.DAY_OF_WEEK);
                                            switch(day){
                                            case 1:
                                                daytext="SUNDAY";
                                                break;
                                            case 2:
                                                daytext="MONDAY";
                                                break;
                                            case 3:
                                                daytext="TUESDAY";
                                                break;
                                            case 4:
                                                daytext="WEDNESDAY";
                                                break;
                                            case 5:
                                                daytext="THURSDAY";
                                                break;
                                            case 6:
                                                daytext="FRIDAY";
                                                break;
                                            case 7:
                                                daytext="SATURDAY";
                                                break;
                                            }
                                            savePreferences();
                                            loadSavedpreferences();
                            }
                        });
                    } catch (Exception e) {
                        // TODO: handle exception
                        e.printStackTrace();
                    }
                }
                }
        });
    }




    private void savePreferences() {
        // TODO Auto-generated method stub
        SharedPreferences savedata = getSharedPreferences("savealldata",0);
        Editor editor=savedata.edit();
        editor.putInt("timesec",timesec);
        editor.putInt("timeminute", timeminute);
        editor.putInt("timehour", timehour);
        editor.putInt("dateday", dateday);
        editor.putInt("datemonth", datemonth);
        editor.putInt("dateyear", dateyear);
        editor.putInt("ampm", ampm);
        editor.putString("daytext", daytext);
        editor.putString("ampmtext", ampmtext);
        editor.commit();
    }


    private void initialize() {
        // TODO Auto-generated method stub
        aziangle=(TextView)findViewById(R.id.tvAziAngle);
        elevation=(TextView)findViewById(R.id.tvElevation);
        numberof=(TextView)findViewById(R.id.tvNumberof);
        rightasc=(TextView)findViewById(R.id.tvRightAsc);
        decli=(TextView)findViewById(R.id.tvDecli);
        hourangle=(TextView)findViewById(R.id.tvHourAngle);
        solartime=(TextView)findViewById(R.id.tvSolarTime);
        showday=(TextView)findViewById(R.id.tvDay);
        showdate=(TextView)findViewById(R.id.tvDate);
        showtime=(TextView)findViewById(R.id.tvTime);
        showinlat=(TextView)findViewById(R.id.tvShowInLat);
        showinlong=(TextView)findViewById(R.id.tvShowInLong);
        showintimezone=(TextView)findViewById(R.id.tvShowInTimeZone);
        showindlst=(TextView)findViewById(R.id.tvShowInDLST);
        showinofftime=(TextView)findViewById(R.id.tvShowInOffTime);
        showinoffazi=(TextView)findViewById(R.id.tvShowInOffAzimuth);
        showinoffele=(TextView)findViewById(R.id.tvShowInOffElevation);
        showinoffphi=(TextView)findViewById(R.id.tvShowInOffphi);
        showinofflamda=(TextView)findViewById(R.id.tvShowInOfflamda);
        showinoffxi=(TextView)findViewById(R.id.tvShowInOffxi);
        editting=(Button)findViewById(R.id.bedit);
        editting.setOnClickListener(this);
        }


    private void loadSavedpreferences() {
        // TODO Auto-generated method stub
        SharedPreferences savedata= getSharedPreferences("savealldata",0);
        //input
        sshowday=savedata.getString("daytext",null);
        showday.setText(sshowday);

        takedateday=savedata.getInt("dateday",00);
        takedatemonth=savedata.getInt("datemonth", 00);
        takedateyear=savedata.getInt("dateyear", 00);
        showdate.setText(takedateday + "/" + takedatemonth + "/" + takedateyear);

        taketimesec=savedata.getInt("timesec", 00);
        taketimeminute=savedata.getInt("timeminute", 00);
        taketimehour=savedata.getInt("timehour", 00);
        takeampmtext=savedata.getString("ampmtext", "AM");
        showtime.setText(taketimehour + ":" + taketimeminute + ":" + taketimesec + takeampmtext);

        show1=savedata.getString("show1",null);
        latval=savedata.getFloat("latval", 0);
        showinlat.setText("Latitude : " + latval + ", " + show1);

        show2=savedata.getString("show2",null);
        longval=savedata.getFloat("longval",0);
        showinlong.setText("Longitude : " + longval + ", " + show2);

        show3=savedata.getString("show3",null);
        timeval=savedata.getInt("timezoneval",0);
        showintimezone.setText("Time Zone : " + timeval + show3);

        show4=savedata.getString("show4","No");
        showindlst.setText("Daylight Saving Time : "+ show4);

        offtimeval=savedata.getFloat("show5",0);
        showinofftime.setText("Offset Time : " + offtimeval);

        offazival=savedata.getFloat("show6",0);
        showinoffazi.setText("Offset Azimuth : "+ offazival);

        offeleval=savedata.getFloat("show7",0);
        showinoffele.setText("Offset Elevation : " + offeleval);

        offphival=savedata.getFloat("show8", 0);
        showinoffphi.setText("Offset Φ :" + offphival);

        offlamdaval=savedata.getFloat("show9", 0);
        showinofflamda.setText("Offset λ : "+offlamdaval);

        offxival=savedata.getFloat("show10", 0);
        showinoffxi.setText("Offset ξ : "+ offxival);
        //output
        showazi=savedata.getString("azimuth", null);
        aziangle.setText("Azimuth Angle : " + showazi);

        showele=savedata.getString("elevation", null);
        elevation.setText("Elevation Angle" + showele);

        shownoday=savedata.getString("jd", null);
        numberof.setText("Number of Days : " + shownoday);

        showra=savedata.getString("RA", null);
        rightasc.setText("Right Ascension : " + showra);

        showdecli=savedata.getString("declination", null);
        decli.setText("Declination Angle : " + showdecli);

        showh_angle=savedata.getString("h_angle", null);
        hourangle.setText("Hour Angle : " + showh_angle);

        shows_time=savedata.getString("s_time", null);
        solartime.setText("Solar Time : " + shows_time);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        shutdown = true;
        Intent e = new Intent(MainActivity.this,Parameterlist.class);
        startActivity(e);
    }
    @Override
    protected void onDestroy() {
        // TODO Auto-generated method stub
        super.onDestroy();
        shutdown = true ; 
    }


}

2 个答案:

答案 0 :(得分：1)

你写过

 while (true) {

而不是

while(!shutdown) {

您还应该更改

@Override
protected void onDestroy() {
    // TODO Auto-generated method stub
    super.onDestroy();
    shutdown = true ; 
}

要

@Override
protected void onDestroy() {
    // TODO Auto-generated method stub
    shutdown = true ;
    super.onDestroy();
}

答案 1 :(得分：0)

我也是Android新手，但您可以尝试在按钮onClick方法上调用它：

  if(shutdown){

         mHandler.removeCallbacksAndMessages(runnable);
        thread.interrupt()
    }
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