@Override
public void run() {
Looper.prepare();
Looper myLooper = Looper.myLooper();
Looper mainLooper = Looper.getMainLooper();
String msgobj;
if (null == myLooper) {
mOwnLooperThreadHandler = new EventHandler(mainLooper);
msgobj =
"OwnLooperThread has no looper and handleMessage function executed in main thread!";
} else {
mOwnLooperThreadHandler = new EventHandler(myLooper);
msgobj =
"This is from OwnLooperThread self and handleMessage function executed in NoLooperThread!";
}
mOwnLooperThreadHandler.removeMessages(0);
// 给自己发送消息
Message msg = mOwnLooperThreadHandler.obtainMessage(3, 1, 1, msgobj);
mOwnLooperThreadHandler.sendMessage(msg);
Looper.loop();
}
@Override
public void run() {
Looper myLooper = Looper.myLooper();
Looper mainLooper = Looper.getMainLooper();
String msgobj;
if (null == myLooper) {
// 这里获得的是主线程的Looper,由于NoLooperThread没有自己的looper所以这里肯定会被执行
mNoLooperThreadHandler = new EventHandler(mainLooper);
msgobj = "NoLooperThread has no looper and handleMessage function executed in main thread!";
} else {
mNoLooperThreadHandler = new EventHandler(myLooper);
msgobj =
"This is from NoLooperThread self and handleMessage function executed in NoLooperThread!";
}
mNoLooperThreadHandler.removeMessages(0);
if (bpostRunnable == false) {
// send message to main thread
Message msg = mNoLooperThreadHandler.obtainMessage(2, 1, 1, msgobj);
mNoLooperThreadHandler.sendMessage(msg);
Log.e(TAG, "NoLooperThread id:--------+>" + this.getId());
} else {
// 下面new出来的实现了Runnable接口的对象中run函数是在Main Thread中执行，不是在NoLooperThread中执行 记得 null == myLooper么
// 注意Runnable是一个接口，它里面的run函数被执行时不会再新建一个线程
// 您可以在run上加断点然后在eclipse调试中看它在哪个线程中执行
mNoLooperThreadHandler.post(
new Runnable() {
public void run() {
// TODO Auto-generated method stub
tv.setText("update UI through handler post runnalbe mechanism!");
Log.e(TAG, "update UI id:--------+>" + Thread.currentThread().getId());
noLooperThread.stop();
}
});
}
}
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case 101:
// 主线程发送消息给自己
Looper looper = Looper.myLooper(); // get the Main looper related with the main thread
// 如果不给任何参数的话会用当前线程对应的Looper(这里就是Main Looper)为Handler里面的成员mLooper赋值
mHandler = new EventHandler(looper);
// 清除整个MessageQueue里的消息
mHandler.removeMessages(0);
String obj = "This main thread's message and received by itself!";
Message msg = mHandler.obtainMessage(1, 1, 1, obj);
// 将Message对象送入到main thread的MessageQueue里面
mHandler.sendMessage(msg);
break;
case 102:
// other线程发送消息给主线程
bpostRunnable = false;
noLooperThread = new NoLooperThread();
noLooperThread.start();
break;
case 103:
// other thread获取它自己发送的消息
tv.setText("please look at the error level log for other thread received message");
ownLooperThread = new OwnLooperThread();
ownLooperThread.start();
break;
case 104:
// other thread通过Post Runnable方式发送消息给主线程
bpostRunnable = true;
noLooperThread = new NoLooperThread();
noLooperThread.start();
break;
case 105:
// 主线程发送消息给other thread
if (null != mOtherThreadHandler) {
tv.setText(
"please look at the error level log for other thread received message from main thread");
String msgObj = "message from mainThread";
Message mainThreadMsg = mOtherThreadHandler.obtainMessage(1, 1, 1, msgObj);
mOtherThreadHandler.sendMessage(mainThreadMsg);
}
break;
case 106:
finish();
break;
}
}