本文介绍了停止处理程序()。postDelay的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我调用多个处理程序通过新的处理程序()。postDelayed(新的Runnable().....我怎么能阻止它,如果我点击返回按钮?

 公共类Tag1中扩展Oberklasse实现OnClickListener {

公众按钮BTN;
//专用处理器将myHandler =新的处理程序();
处理程序处理程序;
可运行myRunnable;




@覆盖
公共无效的onCreate(包savedInstanceState){
    super.onCreate(savedInstanceState);
    的setContentView(R.layout.tt1);
    // Bildschirm索尔anbleiben!
    。getWindow()addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

    //Lautstärke按钮启用
    setVolumeControlStream(AudioManager.STREAM_MUSIC);





    getActionBar()的setTitle(变量1)。
    getActionBar()setDisplayHomeAsUpEnabled(真)。


    //tt1.xml beschriften
    TextView中的TextView =(TextView中)findViewById(R.id.uebung1);
    textView.setText(Übung1:);

    TextView的textView2 =(TextView中)findViewById(R.id.uebung2);
    textView2.setText(Übung2:);

    TextView的textView3 =(TextView中)findViewById(R.id.uebung3);
    textView3.setText(Übung3:);

    TextView的textView4 =(TextView中)findViewById(R.id.uebung4);
    textView4.setText(Übung4:);

    TextView的textView5 =(TextView中)findViewById(R.id.uebung5);
    textView5.setText(Übung5:);

    TextView的textView6 =(TextView中)findViewById(R.id.uebung6);
    textView6.setText(Übung6:);

    TextView的textView7 =(TextView中)findViewById(R.id.uebung7);
    textView7.setText(Übung7:);






    //按钮芬登UND Initialisieren!
    BTN =(按钮)findViewById(R.id.trainingsstart);
    btn.setOnClickListener(本);

}

@覆盖
公共无效的onClick(视图v){





    紧缩();

    处理程序处理程序=新的处理程序();
    可运行myRunnable =新的Runnable(){
    公共无效的run(){
        UnterarmLiegestütz1();
    }
    };
    handler.postDelayed(myRunnable,3000);

}

@覆盖
公共无效onBack pressed(){
    super.onBack pressed();
    uebung.stop();
    handler.removeCallbacks(myRunnable);

}






}
 

我有我的处理程序还没有一个名称,如将myHandler的问题。我该如何处理呢?感谢您的帮助!

现在我得到这些错误:

  03-28 17:47:03.662:E / AndroidRuntime(1961年):致命异常:主要
03-28 17:47:03.662:E / AndroidRuntime(1961年):显示java.lang.NullPointerException
03-28 17:47:03.662:E / AndroidRuntime(1961年):在de.basti12354.tage.uebungen.Tag1.onBack pressed(Tag1.java:120)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.app.Activity.onKeyUp(Activity.java:2159)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.view.KeyEvent.dispatch(KeyEvent.java:2647)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.app.Activity.dispatchKeyEvent(Activity.java:2389)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在com.android.internal.policy.impl.PhoneWindow $ DecorView.dispatchKeyEvent(PhoneWindow.java:1860)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.view.ViewRootImpl $ ViewPostImeInputStage.processKeyEvent(ViewRootImpl.java:3791)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.view.ViewRootImpl $ ViewPostImeInputStage.onProcess(ViewRootImpl.java:3774)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.view.ViewRootImpl $ InputStage.deliver(ViewRootImpl.java:3379)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.view.ViewRootImpl $ InputStage.onDeliverToNext(ViewRootImpl.java:3429)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.view.ViewRootImpl $ InputStage.forward(ViewRootImpl.java:3398)
03-28 17:47:03.662:E / AndroidRuntime(1961):在android.view.ViewRootImpl $ AsyncInputStage.forward(ViewRootImpl.java:3483)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.view.ViewRootImpl $ InputStage.apply(ViewRootImpl.java:3406)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.view.ViewRootImpl $ AsyncInputStage.apply(ViewRootImpl.java:3540)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.view.ViewRootImpl $ InputStage.deliver(ViewRootImpl.java:3379)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.view.ViewRootImpl $ InputStage.onDeliverToNext(ViewRootImpl.java:3429)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.view.ViewRootImpl $ InputStage.forward(ViewRootImpl.java:3398)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.view.ViewRootImpl $ InputStage.apply(ViewRootImpl.java:3406)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.view.ViewRootImpl $ InputStage.deliver(ViewRootImpl.java:3379)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.view.ViewRootImpl $ InputStage.onDeliverToNext(ViewRootImpl.java:3429)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.view.ViewRootImpl $ InputStage.forward(ViewRootImpl.java:3398)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.view.ViewRootImpl $ AsyncInputStage.forward(ViewRootImpl.java:3516)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.view.ViewRootImpl $ ImeInputStage.onFinishedInputEvent(ViewRootImpl.java:3666)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.view.inputmethod.InputMethodManager $ PendingEvent.run(InputMethodManager.java:1982)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.view.inputmethod.InputMethodManager.invokeFinishedInputEventCallback(InputMethodManager.java:1698)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.view.inputmethod.InputMethodManager.finishedInputEvent(InputMethodManager.java:1689)
03-28 17:47:03.662:E / AndroidRuntime(1961):在android.view.inputmethod.InputMethodManager$ImeInputEventSender.onInputEventFinished(InputMethodManager.java:1959)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.view.InputEventSender.dispatchInputEventFinished(InputEventSender.java:141)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.os.MessageQueue.nativePollOnce(本机方法)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.os.MessageQueue.next(MessageQueue.java:132)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.os.Looper.loop(Looper.java:124)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在android.app.ActivityThread.main(ActivityThread.java:5103)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在java.lang.reflect.Method.invokeNative(本机方法)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在java.lang.reflect.Method.invoke(Method.java:525)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:737)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
03-28 17:47:03.662:E / AndroidRuntime(1961年):在dalvik.system.NativeStart.main(本机方法)
 

解决方案

您可以使用

 处理程序处理程序=新的处理程序()
 handler.postDelayed(新的Runnable()
 

您可以使用

  handler.removeCallbacksAndMessages(空);
 

文档

 公众最终无效removeCallbacksAndMessages(对象令牌)

新增的API级别1
删除回调的任何未决的帖子和发送的消息其obj为标记。如果标记为空,所有的回调和消息将被删除。
 

 处理程序处理程序=新的处理程序()
可运行myRunnable =新的Runnable(){
公共无效的run(){
    // 做一点事
}
};
handler.postDelayed(myRunnable,zeit_dauer2);
 

然后

  handler.removeCallbacks(myRunnable);
 

文档

 公众最终无效removeCallbacks(Runnable的R)

新增的API级别1
删除了Runnable为r的任何未决的职位是在消息队列中。

公众最终无效removeCallbacks(Runnable的R,对象令牌)
 

编辑:

更改此

  @覆盖
公共无效的onClick(视图v){
紧缩();
处理程序处理程序=新的处理程序();
可运行myRunnable =新的Runnable(){
 

  @覆盖
公共无效的onClick(视图v){
紧缩();
处理程序=新的处理程序();
myRunnable =新的Runnable(){
 

因为你有下文。前的onCreate 宣告但你重新声明,然后在的onClick 导致NPE。

初始化它

 处理程序处理; //前的onCreate声明
可运行myRunnable;
 

I call multiple Handlers by new Handler().postDelayed(new Runnable().....How can I stop it, if I click on return button?

 public class Tag1 extends Oberklasse implements OnClickListener {

public Button btn;
//private Handler myHandler = new Handler();
Handler handler;
Runnable myRunnable;




@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.tt1);
    //Bildschirm soll anbleiben!!!
    getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

    //Lautstärke BUttons enable
    setVolumeControlStream(AudioManager.STREAM_MUSIC);





    getActionBar().setTitle("Tag 1");
    getActionBar().setDisplayHomeAsUpEnabled(true);


    //tt1.xml beschriften
    TextView textView = (TextView)findViewById(R.id.uebung1);
    textView.setText("Übung 1:");

    TextView textView2 = (TextView)findViewById(R.id.uebung2);
    textView2.setText("Übung 2:");

    TextView textView3 = (TextView)findViewById(R.id.uebung3);
    textView3.setText("Übung 3:");

    TextView textView4 = (TextView)findViewById(R.id.uebung4);
    textView4.setText("Übung 4:");

    TextView textView5 = (TextView)findViewById(R.id.uebung5);
    textView5.setText("Übung 5:");

    TextView textView6 = (TextView)findViewById(R.id.uebung6);
    textView6.setText("Übung 6:");

    TextView textView7 = (TextView)findViewById(R.id.uebung7);
    textView7.setText("Übung 7:");






    //Button finden und Initialisieren!
    btn = (Button) findViewById(R.id.trainingsstart);
    btn.setOnClickListener(this);

}

@Override
public void onClick(View v) {





    Crunch();

    Handler handler=  new Handler();
    Runnable myRunnable = new Runnable() {
    public void run() {
        UnterarmLiegestütz1();
    }
    };
    handler.postDelayed(myRunnable,3000);

}

@Override
public void onBackPressed() {
    super.onBackPressed();
    uebung.stop();
    handler.removeCallbacks(myRunnable);

}






}

I have the problem that my Handlers haven't a name like "myHandler" . How can I handle it?THanks for help!

Now I got these error:

03-28 17:47:03.662: E/AndroidRuntime(1961): FATAL EXCEPTION: main
03-28 17:47:03.662: E/AndroidRuntime(1961): java.lang.NullPointerException
03-28 17:47:03.662: E/AndroidRuntime(1961):     at de.basti12354.tage.uebungen.Tag1.onBackPressed(Tag1.java:120)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.app.Activity.onKeyUp(Activity.java:2159)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.view.KeyEvent.dispatch(KeyEvent.java:2647)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.app.Activity.dispatchKeyEvent(Activity.java:2389)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1860)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.view.ViewRootImpl$ViewPostImeInputStage.processKeyEvent(ViewRootImpl.java:3791)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:3774)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3429)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3398)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3483)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3406)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3540)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3429)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3398)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3406)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3429)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3398)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3516)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.view.ViewRootImpl$ImeInputStage.onFinishedInputEvent(ViewRootImpl.java:3666)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.view.inputmethod.InputMethodManager$PendingEvent.run(InputMethodManager.java:1982)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.view.inputmethod.InputMethodManager.invokeFinishedInputEventCallback(InputMethodManager.java:1698)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.view.inputmethod.InputMethodManager.finishedInputEvent(InputMethodManager.java:1689)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.view.inputmethod.InputMethodManager$ImeInputEventSender.onInputEventFinished(InputMethodManager.java:1959)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.view.InputEventSender.dispatchInputEventFinished(InputEventSender.java:141)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.os.MessageQueue.nativePollOnce(Native Method)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.os.MessageQueue.next(MessageQueue.java:132)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.os.Looper.loop(Looper.java:124)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at android.app.ActivityThread.main(ActivityThread.java:5103)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at java.lang.reflect.Method.invokeNative(Native Method)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at java.lang.reflect.Method.invoke(Method.java:525)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
03-28 17:47:03.662: E/AndroidRuntime(1961):     at dalvik.system.NativeStart.main(Native Method)
解决方案

You can use

 Handler handler = new Handler()
 handler.postDelayed(new Runnable()

You can use

 handler.removeCallbacksAndMessages(null);

Docs

public final void removeCallbacksAndMessages (Object token)

Added in API level 1
Remove any pending posts of callbacks and sent messages whose obj is token. If token is null, all callbacks and messages will be removed.

OR

Handler handler=  new Handler()
Runnable myRunnable = new Runnable() {
public void run() {
    // do something
}
};
handler.postDelayed(myRunnable,zeit_dauer2);

Then

handler.removeCallbacks(myRunnable);

Docs

public final void removeCallbacks (Runnable r)

Added in API level 1
Remove any pending posts of Runnable r that are in the message queue.

public final void removeCallbacks (Runnable r, Object token)

Edit:

Change this

@Override
public void onClick(View v) {
Crunch();
Handler handler=  new Handler();
Runnable myRunnable = new Runnable() {

TO

@Override
public void onClick(View v) {
Crunch();
handler=  new Handler();
myRunnable = new Runnable() {

Coz you have the below. Declared before onCreate but you re-declared and then initialized it in onClick leading to NPE.

Handler handler; // declared before onCreate
Runnable myRunnable;

这篇关于停止处理程序()。postDelay的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

08-28 03:19