[英]Use handler inside Thread
I want to use a handler inside my thread but produces error. 我想在线程中使用处理程序,但是会产生错误。 this is part of my code, function where i have the problem, where control is a boolean and bucle a Thread.
这是我的代码的一部分,我遇到的问题是函数,控制是布尔值,而bucle Thread。
private void mainbucle() {
bucle = new Thread(new Runnable() {
@Override
public void run() {
while (control == true) {
Handler handler2 = new Handler();
handler2.postDelayed(new Runnable() {
public void run() {
//MY ACTIONS//
}
}, 1000);
}
}
}, "bucle telo");
bucle.start();
}
And this the logcat: 这是日志:
03-12 13:22:44.321: E/AndroidRuntime(18987): FATAL EXCEPTION: bucle telo
03-12 13:22:44.321: E/AndroidRuntime(18987): Process: com.example.uwbprototipe, PID: 18987
03-12 13:22:44.321: E/AndroidRuntime(18987): java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
03-12 13:22:44.321: E/AndroidRuntime(18987): at android.os.Handler.<init>(Handler.java:200)
03-12 13:22:44.321: E/AndroidRuntime(18987): at android.os.Handler.<init>(Handler.java:114)
03-12 13:22:44.321: E/AndroidRuntime(18987): at com.example.uwbprototipe.MainActivity$4.run(MainActivity.java:224)
03-12 13:22:44.321: E/AndroidRuntime(18987): at java.lang.Thread.run(Thread.java:841)
03-12 13:22:44.911: E/ActivityThread(18987): Activity com.example.uwbprototipe.MainActivity has leaked IntentReceiver com.example.uwbprototipe.MainActivity$1@43034be0 that was originally registered here. Are you missing a call to unregisterReceiver()?
03-12 13:22:44.911: E/ActivityThread(18987): android.app.IntentReceiverLeaked: Activity com.example.uwbprototipe.MainActivity has leaked IntentReceiver com.example.uwbprototipe.MainActivity$1@43034be0 that was originally registered here. Are you missing a call to unregisterReceiver()?
03-12 13:22:44.911: E/ActivityThread(18987): at android.app.LoadedApk$ReceiverDispatcher.<init>(LoadedApk.java:805)
03-12 13:22:44.911: E/ActivityThread(18987): at android.app.LoadedApk.getReceiverDispatcher(LoadedApk.java:606)
03-12 13:22:44.911: E/ActivityThread(18987): at android.app.ContextImpl.registerReceiverInternal(ContextImpl.java:1430)
03-12 13:22:44.911: E/ActivityThread(18987): at android.app.ContextImpl.registerReceiver(ContextImpl.java:1410)
03-12 13:22:44.911: E/ActivityThread(18987): at android.app.ContextImpl.registerReceiver(ContextImpl.java:1404)
03-12 13:22:44.911: E/ActivityThread(18987): at android.content.ContextWrapper.registerReceiver(ContextWrapper.java:467)
03-12 13:22:44.911: E/ActivityThread(18987): at com.example.uwbprototipe.MainActivity.onCreate(MainActivity.java:71)
03-12 13:22:44.911: E/ActivityThread(18987): at android.app.Activity.performCreate(Activity.java:5231)
03-12 13:22:44.911: E/ActivityThread(18987): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
03-12 13:22:44.911: E/ActivityThread(18987): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
03-12 13:22:44.911: E/ActivityThread(18987): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
03-12 13:22:44.911: E/ActivityThread(18987): at android.app.ActivityThread.access$800(ActivityThread.java:135)
03-12 13:22:44.911: E/ActivityThread(18987): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
03-12 13:22:44.911: E/ActivityThread(18987): at android.os.Handler.dispatchMessage(Handler.java:102)
03-12 13:22:44.911: E/ActivityThread(18987): at android.os.Looper.loop(Looper.java:136)
03-12 13:22:44.911: E/ActivityThread(18987): at android.app.ActivityThread.main(ActivityThread.java:5017)
03-12 13:22:44.911: E/ActivityThread(18987): at java.lang.reflect.Method.invokeNative(Native Method)
03-12 13:22:44.911: E/ActivityThread(18987): at java.lang.reflect.Method.invoke(Method.java:515)
03-12 13:22:44.911: E/ActivityThread(18987): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
03-12 13:22:44.911: E/ActivityThread(18987): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
03-12 13:22:44.911: E/ActivityThread(18987): at dalvik.system.NativeStart.main(Native Method)
Where and How use loop instructions? 在何处以及如何使用循环指令?
thanks 谢谢
UPDATE UPDATE
With answer of Who am I, i solved the problem but now button which control bucle not responds..this is code of its listener: 随着我是谁的回答,我解决了问题,但是现在控制气泡的按钮没有响应..这是它的侦听器的代码:
private View.OnClickListener btnClick = new View.OnClickListener() {
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btnStart: {
control = true;
enableButtons(true);
mainbucle();
break;
}
case R.id.btnStop: {
control = false;
enableButtons(false);
bucle = null;
break;
}
}
}
};
you must attach handler outside of new thread then use it inside of thread: 您必须在新线程外附加处理程序,然后在线程内使用它:
private void newThread() {
Handler h = new Handler();
Thread t = new Thread(new Runnable() {
@Override
public void run() {
//...
h.postDelayed(new Runnable() {
public void run() {
//...
}
}, 1000);
}
});
t.start();
}
when you post handler, your code will be run in which thread that handler attached to it 当您发布处理程序时,您的代码将在该处理程序附加到的线程中运行
(you must attach handler inside main thread to avoid errors) (您必须在主线程内附加处理程序以避免错误)
EDIT : this may help you 编辑: 这可能对您有帮助
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