话说学习android，开始也就学习学习传值，页面跳转，界面==，要学习还是需要研究的，为了做那个啥闹钟的系统，我试着在android的里面使用线程。恩，先贴之前的。
package com.love;import java.text.SimpleDateFormat;import java.util.Date;import java.util.HashMap;import java.util.Map;import java.util.Set;import com.love.R;import android.app.Activity;import android.content.Context;import
android.os.Bundle;import android.widget.EditText;public class Time extends Activity {private EditText EditText01;MyView myview;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);EditText01
= (EditText) findViewById(R.id.EditText01);thread1 aa = new thread1();new Thread(aa).start();}class thread1 implements Runnable {@Overridepublic void run() {String s1 = "2010-12-13 07:49:00";String s2;Date d2;myview.postInvalidate(); while (true) {d2 = new
Date();s2 = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss").format(d2);if (s2.equals(s1)) {EditText01.setText("shuaiqi");//这里修改了ui文本显示，就各种异常了。}try {Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}}}}}
跟之前netbeans一样，这让我很纠结。按道理是没问题的哇，可是就是这么的悲剧。
我查看了挺多资料的，发现恩，在其他线程中不能修改ui，只能在ui线程中修改，
什么是UI线程呢？
有用户界面的一般称为UI线程,没有界面的称之为工作者线程,当然这两者之间还是有区别的,UI线程因为有界面,所以系统会给它维护一个消息队列,工作者线程就没有消息队列.
因为有界面的关系，所以不能在线程中改，那这么办呢。。
恩，在android中是利用Handler来实现UI线程的更新的。
自己看代码吧。。。
package com.love;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import com.love.R;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;
public class Time extends Activity {
private EditText EditText01;
private EditText EditText02;
private TextView TextView01;
private Button Button01;
private Spinner Spinner_001;
private Spinner Spinner_002;
private Spinner Spinner_011;
private Spinner Spinner_012;
private EditText EditText_001;
private EditText EditText_002;
private CheckBox CheckBox01;
private boolean b1=false;
private String time;
private String s1 = "";
private String s2 = "";
private Date d1;
private Map<String, String> dd = new HashMap<String, String>();
private Handler mHandler = new Handler() {
public void handleMessage(Message msg) {
switch (msg.what) {
case 1:
updateTitle();
break;
}
};
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
EditText01 = (EditText) findViewById(R.id.EditText01);
EditText02 = (EditText) findViewById(R.id.EditText02);
EditText_001 = (EditText) findViewById(R.id.EditText_001);
EditText_002 = (EditText) findViewById(R.id.EditText_002);
TextView01 = (TextView) findViewById(R.id.TextView01);
Spinner_001=(Spinner)findViewById(R.id.Spinner_001);
Spinner_002=(Spinner)findViewById(R.id.Spinner_002);
Spinner_011=(Spinner)findViewById(R.id.Spinner_011);
Spinner_012=(Spinner)findViewById(R.id.Spinner_012);
CheckBox01=(CheckBox)findViewById(R.id.CheckBox01);
Button01=(Button)findViewById(R.id.Button01);
Button01.setOnClickListener(new ButtonListener());
new Thread(new myThread()).start();
}
class ButtonListener implements OnClickListener{
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(EditText02.getText()!=null&&EditText_001.getText()!=null&&EditText_002.getText()!=null){
b1=true;
}
if(CheckBox01.isChecked()){
s1=String.valueOf(Spinner_001.getSelectedItem())+"-"+String.valueOf(Spinner_002.getSelectedItem())+
"-"+String.valueOf(Spinner_011.getSelectedItem())+" "+String.valueOf(Spinner_012.getSelectedItem())+":"+
String.valueOf(EditText_001.getText())+":"+String.valueOf(EditText_002.getText());
s2=String.valueOf(EditText02.getText());
dd.put(s1, s2);
s1="";
s2="";
}else
{
s1=String.valueOf(Spinner_001.getSelectedItem())+"-"+String.valueOf(Spinner_002.getSelectedItem())+
"-"+String.valueOf(Spinner_011.getSelectedItem())+" "+String.valueOf(Spinner_012.getSelectedItem())+":"+
String.valueOf(EditText_001.getText())+":"+String.valueOf(EditText_002.getText());
s2=String.valueOf(EditText02.getText());
}
}
}
class myThread implements Runnable {
public void run() {
while (true) {
Message message = new Message();
message.what = 1;
mHandler.sendMessage(message);
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
}
}
}
public void updateTitle() {
d1 = new Date();
time = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss").format(d1);
TextView01.setText(time);
if(b1==true){
EditText01.setText("同学请输入完整！");
}
if(CheckBox01.isChecked()){
Set<String> set = dd.keySet();
for (String s : set) {
if (s.equals(time)) {
if (dd.get(s).equals("eat")) {
EditText01.setText("同学你该"+dd.get(s)+"了哦！");
}
if (dd.get(s).equals("xizao")) {
EditText01.setText("同学你该"+dd.get(s)+"了哦！");
}
if (dd.get(s).equals("sleep")) {
EditText01.setText("同学你该"+dd.get(s)+"了哦！");
}
}
}
}
else{
if (time.equals(s1)) {
EditText01.setText("同学你该"+s2+"了哦！");
}
}
}
}