android定时
2016-06-08 21:44
405 查看
方法一:Handler+Thread
[java] view
plain copy
package com.xunfang.handerDemo;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.widget.TextView;
/**
* handler定时器
*
* @author Smalt
*
*/
public class HanderDemoActivity extends Activity {
TextView tvShow;
private int i = 0;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tvShow = (TextView) findViewById(R.id.tv_show);
new Thread(new ThreadShow()).start();
}
// handler类接收数据
Handler handler = new Handler() {
public void handleMessage(Message msg) {
if (msg.what == 1) {
tvShow.setText(Integer.toString(i++));
System.out.println("receive....");
}
};
};
// 线程类
class ThreadShow implements Runnable {
@Override
public void run() {
// TODO Auto-generated method stub
while (true) {
try {
Thread.sleep(1000);
Message msg = new Message();
msg.what = 1;
handler.sendMessage(msg);
System.out.println("send...");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
System.out.println("thread error...");
}
}
}
}
}
方法二:Handler类自带的postDelyed
[java] view
plain copy
package com.xunfang.handerDemo;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.widget.TextView;
/**
* handler定时器使用postDelyed实现
*
* @author Smalt
*
*/
public class HanderDemoActivity extends Activity {
TextView tvShow;
private int i = 0;
private int TIME = 1000;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tvShow = (TextView) findViewById(R.id.tv_show);
handler.postDelayed(runnable, TIME); //每隔1s执行
}
Handler handler = new Handler();
Runnable runnable = new Runnable() {
@Override
public void run() {
// handler自带方法实现定时器
try {
handler.postDelayed(this, TIME);
tvShow.setText(Integer.toString(i++));
System.out.println("do...");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
System.out.println("exception...");
}
}
};
}
方法三:
Handler+Timer+TimerTask
[java] view
plain copy
package com.xunfang.handerDemo;
import java.util.Timer;
import java.util.TimerTask;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.widget.TextView;
/**
* 定时器实现:Handler+Timer+TimerTask
*
* @author Smalt
*
*/
public class HanderDemoActivity extends Activity {
TextView tvShow;
private int i = 0;
private int TIME = 1000;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tvShow = (TextView) findViewById(R.id.tv_show);
timer.schedule(task, 1000, 1000); // 1s后执行task,经过1s再次执行
}
Handler handler = new Handler() {
public void handleMessage(Message msg) {
if (msg.what == 1) {
tvShow.setText(Integer.toString(i++));
}
super.handleMessage(msg);
};
};
Timer timer = new Timer();
TimerTask task = new TimerTask() {
@Override
public void run() {
// 需要做的事:发送消息
Message message = new Message();
message.what = 1;
handler.sendMessage(message);
}
};
}
[java] view
plain copy
package com.xunfang.handerDemo;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.widget.TextView;
/**
* handler定时器
*
* @author Smalt
*
*/
public class HanderDemoActivity extends Activity {
TextView tvShow;
private int i = 0;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tvShow = (TextView) findViewById(R.id.tv_show);
new Thread(new ThreadShow()).start();
}
// handler类接收数据
Handler handler = new Handler() {
public void handleMessage(Message msg) {
if (msg.what == 1) {
tvShow.setText(Integer.toString(i++));
System.out.println("receive....");
}
};
};
// 线程类
class ThreadShow implements Runnable {
@Override
public void run() {
// TODO Auto-generated method stub
while (true) {
try {
Thread.sleep(1000);
Message msg = new Message();
msg.what = 1;
handler.sendMessage(msg);
System.out.println("send...");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
System.out.println("thread error...");
}
}
}
}
}
方法二:Handler类自带的postDelyed
[java] view
plain copy
package com.xunfang.handerDemo;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.widget.TextView;
/**
* handler定时器使用postDelyed实现
*
* @author Smalt
*
*/
public class HanderDemoActivity extends Activity {
TextView tvShow;
private int i = 0;
private int TIME = 1000;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tvShow = (TextView) findViewById(R.id.tv_show);
handler.postDelayed(runnable, TIME); //每隔1s执行
}
Handler handler = new Handler();
Runnable runnable = new Runnable() {
@Override
public void run() {
// handler自带方法实现定时器
try {
handler.postDelayed(this, TIME);
tvShow.setText(Integer.toString(i++));
System.out.println("do...");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
System.out.println("exception...");
}
}
};
}
方法三:
Handler+Timer+TimerTask
[java] view
plain copy
package com.xunfang.handerDemo;
import java.util.Timer;
import java.util.TimerTask;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.widget.TextView;
/**
* 定时器实现:Handler+Timer+TimerTask
*
* @author Smalt
*
*/
public class HanderDemoActivity extends Activity {
TextView tvShow;
private int i = 0;
private int TIME = 1000;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tvShow = (TextView) findViewById(R.id.tv_show);
timer.schedule(task, 1000, 1000); // 1s后执行task,经过1s再次执行
}
Handler handler = new Handler() {
public void handleMessage(Message msg) {
if (msg.what == 1) {
tvShow.setText(Integer.toString(i++));
}
super.handleMessage(msg);
};
};
Timer timer = new Timer();
TimerTask task = new TimerTask() {
@Override
public void run() {
// 需要做的事:发送消息
Message message = new Message();
message.what = 1;
handler.sendMessage(message);
}
};
}
相关文章推荐
- Android内存泄露案例和解析
- Android官方SwipeRefreshLayout
- Cannot find installed sources of Android API 23
- Android Studio中使用OpenCV Android SDK
- Android之GLES2.0画三角形测试代码
- Android开发之“友录”
- 说说Android的广播(5) - 广播的历史
- androidStudio 中的关于 dataBinding 的使用
- Android开发之友录项目层次结构
- Android系统自带样式(@android:style/)
- [Android] 在ScrollView 中嵌套 GridView/ListView时只显示一行的原因和解决办法
- FloatingActionButton的个人总结
- java.lang.NullPointerException at android.widget.AbsListView.obtainView
- Android AIDL理解
- 使用Fresco加载图片
- 实现打开Android系统相册、照相机并实现照相,录像功能。
- Android AutoLayout全新的适配方式 堪称适配终结者
- [Android] Fragment 完全解析
- Android加速度传感器应用之晃动次数测试(摇一摇)
- Android距离传感器应用之俯卧撑计数