定时器三种EditTexts不能正常工作 [英] Timer in three EditTexts not working properly
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问题描述
的EditText 和按钮。当我preSS 按钮首次在1号计时器的EditText 开始，当我preSS它第二次在第1计时器的EditText 将停止，并在同一时间，第二个定时器的EditText 将被启动，当我再次preSS按钮，同样的事情也会有3 的EditText 。问题是有时3的EditText不正常的计时器（不显示）..我的code是如下：
I have made a Timer Application in android.In application there are three (uneditable)EditText and a Button.When i press Button first time the timer in 1st EditText will start ,when i press it 2nd time the timer in 1st EditText will stop and at the same time the timer in 2nd EditText will be start,when i again press button same thing will be happened with 3rd EdtiText.NOw this code is working properly but when i press back button and again start it,its stopped working in 3rd EditText.The problem is sometimes the timer in 3rd EditText is not working(not displayed)..my code is as below:
mainActivity.java
package com.example.timerdemo2;
import java.util.Date;
import java.text.SimpleDateFormat;
import java.util.TimeZone;
import java.util.Timer;
import java.util.TimerTask;
import org.w3c.dom.Text;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends Activity {
EditText et1,et2,et3;
TextView tv;
public int i=0;
long starttime = 0;
long lasttime,lasttime1;
final Handler handler = new Handler();
Handler h2 = new Handler();
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
moveTaskToBack(true);
return true;
}
return super.onKeyDown(keyCode, event);
}
Runnable run = new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
long millis = System.currentTimeMillis() - starttime;
int seconds = (int) (millis / 1000);
int minutes = (seconds%3600)/60;
int hours = seconds / 3600;
seconds = seconds % 60;
et1.setText(String.format("%02d:%02d:%02d",hours, minutes, seconds));
// et2.setText(String.format("%02d:%02d:%02d",hours, minutes, seconds));
// et3.setText(String.format("%02d:%02d:%02d",hours, minutes, seconds));
h2.postDelayed(this, 500);
}
};
class firstTask extends TimerTask {
public void run() {
handler.sendEmptyMessage(0);
}
};
class secondTask extends TimerTask{
@Override
public void run() {
// TODO Auto-generated method stub
MainActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
long millis = System.currentTimeMillis() - starttime;
int seconds = (int)(millis/1000);
int hours =seconds/3600;
int minutes = (seconds % 3600)/60;
seconds = seconds % 60;
et2.setText(String.format("%02d:%02d:%02d", hours,minutes,seconds));
}
});
}
}
class thirdTask extends TimerTask{
@Override
public void run() {
// TODO Auto-generated method stub
MainActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
long millis = System.currentTimeMillis() - starttime;
int seconds = (int)(millis/1000);
int hours =seconds/3600;
int minutes = (seconds % 3600)/60;
seconds = seconds % 60;
et3.setText(String.format("%02d:%02d:%02d", hours,minutes,seconds));
h2.postDelayed(this, 500);
}
});
}
}
Timer timer = new Timer();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Bundle bundle = this.getIntent().getExtras();
String title = bundle.getString("title");
tv = (TextView)findViewById(R.id.projectTitle);
tv.setText(title);
et1= (EditText)findViewById(R.id.timeEdit1);
et2= (EditText)findViewById(R.id.timeEdit2);
et3= (EditText)findViewById(R.id.timeEdit3);
Button b = (Button)findViewById(R.id.btn);
b.setText("Start");
b.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
Button b =(Button)v;
if(b.getText().equals("Stop")){
timer.cancel();
timer.purge();
h2.removeCallbacks(run);
Intent intent =new Intent(MainActivity.this,Timedetails.class);
Bundle bundle =new Bundle();
//Procedure for Showing time stamps on another page
String a = et1.getText().toString();
String b1 = et2.getText().toString();
String c = et3.getText().toString();
String t = tv.getText().toString();
intent.putExtra("titl1",t);
startActivity(intent);
SimpleDateFormat format = new SimpleDateFormat("hh:mm:ss");
format.setTimeZone(TimeZone.getTimeZone("UTC"));
try{
bundle.putString("t1", a);
bundle.putString("t2", b1);
bundle.putString("t3", c);
Date date1 = (Date) format.parse(a);
Date date2 = (Date) format.parse(b1);
Date date3 = (Date) format.parse(c);
//time difference in milliseconds
long timeDiff = date2.getTime() - date1.getTime();
long timeDiff2 = date3.getTime() - date2.getTime();
//new date object with time difference
Date diffDate = new Date(timeDiff);
Date diffDate2 = new Date(timeDiff2);
long timeDiffSecs = timeDiff/1000;
String timeDiffString = timeDiffSecs/3600+":"+
(timeDiffSecs%3600)/60+":"+
(timeDiffSecs%3600)%60;
long timeDiffSecs1 = timeDiff2/1000;
String timeDiffString1 = timeDiffSecs1/3600+":"+
(timeDiffSecs1%3600)/60+":"+
(timeDiffSecs1%3600)%60;
//formatted date string
// String timeDiffString = format.format(diffDate);
//System.out.println("Time Diff = "+ timeDiffString );
bundle.putString("t1", a);
bundle.putString("t2", b1);
bundle.putString("t3", c);
bundle.putString("dif1", timeDiffString);
bundle.putString("dif2", timeDiffString1);
}
catch(Exception e){
e.printStackTrace();
}
intent.putExtras(bundle);
startActivity(intent);
b.setText("Next");
}
else if(b.getText().equals("Lap1"))
{
timer.schedule(new secondTask(),0, 500);
h2.removeCallbacks(run);
b.setText("lap2");
}
else if(b.getText().equals("lap2")){
timer.schedule(new thirdTask(), 0,500);
h2.removeCallbacks(run);
timer.cancel();
timer.purge();
b.setText("Stop");
}
else {
starttime = System.currentTimeMillis();
timer = new Timer();
timer.schedule(new firstTask(), 0,500);
// timer.schedule(new secondTask(), 0,500);
//timer.schedule(new thirdTask(), 0,500);
h2.postDelayed(run, 0);
b.setText("Lap1");
//long lastdown = System.currentTimeMillis();
}
}
});
}
}
MainActivity.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/abs5"
android:orientation="vertical" >
<TextView
android:id="@+id/projectTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="top|center"
android:layout_marginTop="5dp"
android:text="Project Title"
android:textColor="#CCCCCC"
android:textSize= "40dp"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textStyle="bold" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:orientation="horizontal" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:layout_marginTop="10dp"
android:text="Timing Point1"
android:textSize="20dp"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#CCCCCC" />
<EditText
android:id="@+id/timeEdit1"
android:layout_width="172dp"
android:layout_height="30dp"
android:layout_marginLeft="5dp"
android:layout_marginTop="10dp"
android:background="#FFFFFF"
android:editable="false"
android:filterTouchesWhenObscured="false"
android:focusable="false" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginTop="10dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Timing Point2"
android:textColor="#CCCCCC"
android:textSize="20dp"
android:layout_marginTop="10dp"
android:layout_marginLeft="5dp"
android:textAppearance="?android:attr/textAppearanceMedium" />
<EditText
android:id="@+id/timeEdit2"
android:layout_width="172dp"
android:layout_height="30dp"
android:layout_marginLeft="5dp"
android:layout_marginTop="10dp"
android:focusable="false"
android:filterTouchesWhenObscured="false"
android:background="#FFFFFF"
android:editable="false" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:orientation="horizontal" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:layout_marginTop="10dp"
android:text="Timing Point3"
android:textColor="#CCCCCC"
android:textSize="20dp"
android:textAppearance="?android:attr/textAppearanceMedium" />
<EditText
android:id="@+id/timeEdit3"
android:layout_width="172dp"
android:layout_height="30dp"
android:layout_marginLeft="5dp"
android:layout_marginTop="10dp"
android:background="#FFFFFF"
android:editable="false" >
<requestFocus />
</EditText>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:layout_marginBottom="20dp"
android:orientation="horizontal" >
<Button
android:id="@+id/btn"
android:layout_width="129dp"
android:layout_height="64dp"
android:layout_marginBottom="10dp"
android:layout_marginLeft="110dp"
android:layout_marginTop="10dp"
android:background="@drawable/aqa"
android:textColor="#FFFFFF"
android:textSize="30dp" />
</LinearLayout>
</LinearLayout>
请帮我这个快...真的感谢你.....甲肝GUD TYM
Please help me for this as fast ...really thanking you.....hav a gud tym
推荐答案
看这code在LAP2处理程序：
Look at this code in your lap2 handler:
timer.schedule(new thirdTask(), 0,500);
h2.removeCallbacks(run);
timer.cancel();
timer.purge();
b.setText("Stop");
您计划任务，并取消计时器随即
You schedule a task and cancel the timer immediately afterwards.
我建议你摆脱定时器，只使用 Handler.postDelayed（）方法，因为你已经做了实时更新，并开始第一场的更新：
I would suggest that you get rid of the Timer and just use the Handler.postDelayed() method, as you have done already for the time updates and to start the update of the first field:
h2.postDelayed(run, 0);
使用相同的方法来启动第二和第三个字段更新。你并不需要在定时和的TimerTask 实例都没有。
Use the same method to start the updates for second and third fields. You don't need the Timer and TimerTask instances at all.
另外，你为什么需要两个处理器（处理程序和 H2 ）？
Also, why do you need two handlers (handler, and h2)?
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