Java 如何停止或销毁Android线程
我知道Java 如何停止或销毁Android线程,java,android,multithreading,Java,Android,Multithreading,我知道stop方法已被弃用，我现在正在使用destroy，但我遇到了以下错误： 11-09 11:42:28.740: E/AndroidRuntime(1538): FATAL EXCEPTION: main 11-09 11:42:28.740: E/AndroidRuntime(1538): java.lang.NoSuchMethodError: Thread.destroy() 11-09 11:42:28.740: E/AndroidRuntime(1538): at jav
stopdestroy11-09 11:42:28.740: E/AndroidRuntime(1538): FATAL EXCEPTION: main
11-09 11:42:28.740: E/AndroidRuntime(1538): java.lang.NoSuchMethodError: Thread.destroy()
11-09 11:42:28.740: E/AndroidRuntime(1538): at java.lang.Thread.destroy(Thread.java:600)
11-09 11:42:28.740: E/AndroidRuntime(1538): at com.rathbones.src.NewslettersActivity.onKeyDown(NewslettersActivity.java:144)
11-09 11:42:28.740: E/AndroidRuntime(1538): at android.view.KeyEvent.dispatch(KeyEvent.java:1037)
11-09 11:42:28.740: E/AndroidRuntime(1538): at android.app.Activity.dispatchKeyEvent(Activity.java:2068)
11-09 11:42:28.740: E/AndroidRuntime(1538): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1643)
11-09 11:42:28.740: E/AndroidRuntime(1538): at android.view.ViewRoot.deliverKeyEventToViewHierarchy(ViewRoot.java:2471)
11-09 11:42:28.740: E/AndroidRuntime(1538): at android.view.ViewRoot.handleFinishedEvent(ViewRoot.java:2441)
11-09 11:42:28.740: E/AndroidRuntime(1538): at android.view.ViewRoot.handleMessage(ViewRoot.java:1735)
11-09 11:42:28.740: E/AndroidRuntime(1538): at android.os.Handler.dispatchMessage(Handler.java:99)
11-09 11:42:28.740: E/AndroidRuntime(1538): at android.os.Looper.loop(Looper.java:123)
11-09 11:42:28.740: E/AndroidRuntime(1538): at android.app.ActivityThread.main(ActivityThread.java:4627)
11-09 11:42:28.740: E/AndroidRuntime(1538): at java.lang.reflect.Method.invokeNative(Native Method)
11-09 11:42:28.740: E/AndroidRuntime(1538): at java.lang.reflect.Method.invoke(Method.java:521)
11-09 11:42:28.740: E/AndroidRuntime(1538): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
11-09 11:42:28.740: E/AndroidRuntime(1538): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
11-09 11:42:28.740: E/AndroidRuntime(1538): at dalvik.system.NativeStart.main(Native Method)
11-09 11:42:28.760: W/ActivityManager(59): Force finishing activity com.rathbones.src/.NewslettersActivity
private void viewOnline() {
if (currentNewsletter == null) {
Log.e(Constants.APP_NAME, "No newsletter selected");
return;
}
final ProgressDialog d = new ProgressDialog(this);
d.setMessage("Downloading...");
d.show();
final Context context = getApplicationContext();
t = new Thread(new Runnable() {
public void run() {
String fileName = currentNewsletter.mFilename;
Log.d(Constants.APP_NAME, "Downloading/showing: " + fileName);
final File file = Utilities.getFileFromURL(context, currentNewsletter.mUrl, currentNewsletter.mExpectedSizeInBytes, fileName, false);
d.dismiss();
// Now we can show the file
viewPDF(file);
}
});
t.start();
// Utilities.List(getApplicationContext().getFilesDir().getPath());
// Utilities.List(getApplicationContext().getDir("files", Context.MODE_WORLD_WRITEABLE).getAbsolutePath());
// Utilities.DeleteDirectory(getApplicationContext().getDir("files", Context.MODE_WORLD_WRITEABLE).getAbsolutePath());
}
private void viewPDF(File file) {
//DEBUG DEBUG DEBUG
//Log.d(Constants.APP_NAME, "ViewPDF: showing " + file.getName());
//Log.d(Constants.APP_NAME, "Path: " + file.getPath());
//Log.d(Constants.APP_NAME, "Exists: " + file.exists());
//Log.d(Constants.APP_NAME, "Length: " + file.length());
//DEBUG DEBUG DEBUG
// Now it's all safe and sound and local, open it
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file), "application/pdf");
try {
startActivity(intent);
} catch (Exception e) {
Toast.makeText(this, "No Application Available to View PDF", Toast.LENGTH_SHORT).show();
}
}
@Override
protected void onStop() {
finish();
super.onStop();
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
t.destroy();
Intent i = new Intent(NewslettersActivity.this,MainMenuActivity.class);
startActivity(i);
finish();
return true;
}
return super.onKeyDown(keyCode, event);
}
11-09 11:42:28.740: E/AndroidRuntime(1538): FATAL EXCEPTION: main
11-09 11:42:28.740: E/AndroidRuntime(1538): java.lang.NoSuchMethodError: Thread.destroy()
11-09 11:42:28.740: E/AndroidRuntime(1538): at java.lang.Thread.destroy(Thread.java:600)
11-09 11:42:28.740: E/AndroidRuntime(1538): at com.rathbones.src.NewslettersActivity.onKeyDown(NewslettersActivity.java:144)
11-09 11:42:28.740: E/AndroidRuntime(1538): at android.view.KeyEvent.dispatch(KeyEvent.java:1037)
11-09 11:42:28.740: E/AndroidRuntime(1538): at android.app.Activity.dispatchKeyEvent(Activity.java:2068)
11-09 11:42:28.740: E/AndroidRuntime(1538): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1643)
11-09 11:42:28.740: E/AndroidRuntime(1538): at android.view.ViewRoot.deliverKeyEventToViewHierarchy(ViewRoot.java:2471)
11-09 11:42:28.740: E/AndroidRuntime(1538): at android.view.ViewRoot.handleFinishedEvent(ViewRoot.java:2441)
11-09 11:42:28.740: E/AndroidRuntime(1538): at android.view.ViewRoot.handleMessage(ViewRoot.java:1735)
11-09 11:42:28.740: E/AndroidRuntime(1538): at android.os.Handler.dispatchMessage(Handler.java:99)
11-09 11:42:28.740: E/AndroidRuntime(1538): at android.os.Looper.loop(Looper.java:123)
11-09 11:42:28.740: E/AndroidRuntime(1538): at android.app.ActivityThread.main(ActivityThread.java:4627)
11-09 11:42:28.740: E/AndroidRuntime(1538): at java.lang.reflect.Method.invokeNative(Native Method)
11-09 11:42:28.740: E/AndroidRuntime(1538): at java.lang.reflect.Method.invoke(Method.java:521)
11-09 11:42:28.740: E/AndroidRuntime(1538): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
11-09 11:42:28.740: E/AndroidRuntime(1538): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
11-09 11:42:28.740: E/AndroidRuntime(1538): at dalvik.system.NativeStart.main(Native Method)
11-09 11:42:28.760: W/ActivityManager(59): Force finishing activity com.rathbones.src/.NewslettersActivity
private void viewOnline() {
if (currentNewsletter == null) {
Log.e(Constants.APP_NAME, "No newsletter selected");
return;
}
final ProgressDialog d = new ProgressDialog(this);
d.setMessage("Downloading...");
d.show();
final Context context = getApplicationContext();
t = new Thread(new Runnable() {
public void run() {
String fileName = currentNewsletter.mFilename;
Log.d(Constants.APP_NAME, "Downloading/showing: " + fileName);
final File file = Utilities.getFileFromURL(context, currentNewsletter.mUrl, currentNewsletter.mExpectedSizeInBytes, fileName, false);
d.dismiss();
// Now we can show the file
viewPDF(file);
}
});
t.start();
// Utilities.List(getApplicationContext().getFilesDir().getPath());
// Utilities.List(getApplicationContext().getDir("files", Context.MODE_WORLD_WRITEABLE).getAbsolutePath());
// Utilities.DeleteDirectory(getApplicationContext().getDir("files", Context.MODE_WORLD_WRITEABLE).getAbsolutePath());
}
private void viewPDF(File file) {
//DEBUG DEBUG DEBUG
//Log.d(Constants.APP_NAME, "ViewPDF: showing " + file.getName());
//Log.d(Constants.APP_NAME, "Path: " + file.getPath());
//Log.d(Constants.APP_NAME, "Exists: " + file.exists());
//Log.d(Constants.APP_NAME, "Length: " + file.length());
//DEBUG DEBUG DEBUG
// Now it's all safe and sound and local, open it
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file), "application/pdf");
try {
startActivity(intent);
} catch (Exception e) {
Toast.makeText(this, "No Application Available to View PDF", Toast.LENGTH_SHORT).show();
}
}
@Override
protected void onStop() {
finish();
super.onStop();
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
t.destroy();
Intent i = new Intent(NewslettersActivity.this,MainMenuActivity.class);
startActivity(i);
finish();
return true;
}
return super.onKeyDown(keyCode, event);
}
使用
interrupt（）destroy（）使用interrupt（）
而不是destroy（）如果线程中有while
循环，则可以通过while条件的布尔标志来控制该线程。当您将标志设置为false时，线程就完成了它的任务
这里有一个小例子：
boolean flag = true;
Thread secondary = new Thread(new Runnable() {
@Override
public void run() {
while (flag) {
// do something
}
}
});
secondary.start(); //start the thread
flag = false; // this will force secondary to finish its execution
try {
secondary.join(); // wait for secondary to finish
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
我将在SO中找到此代码，它也适用于我。如果您有一个线程，其中包含while
循环，您可以通过while条件的布尔标志来控制此线程。当您将标志设置为false时，线程就完成了它的任务
这里有一个小例子：
boolean flag = true;
Thread secondary = new Thread(new Runnable() {
@Override
public void run() {
while (flag) {
// do something
}
}
});
secondary.start(); //start the thread
flag = false; // this will force secondary to finish its execution
try {
secondary.join(); // wait for secondary to finish
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
我将在SO中找到这段代码，它也适用于我。对于用户370305的回答，可能有两个更改可以帮助：
使用AtomicBoolean
而不是boolean，如果线程在另一个内核中运行，则标记的更改将不可见
删除catch中的抛出新运行时异常（e）
。当您抛出异常时，它将崩溃
对于用户370305的回答，可能有两个更改可以帮助您：
使用AtomicBoolean
而不是boolean，如果线程在另一个内核中运行，则标记的更改将不可见
删除catch中的抛出新运行时异常（e）
。当您抛出异常时，它将崩溃
destroy也不推荐使用。请点击此链接：@VineetShukla感谢您让我知道。destroy也不推荐使用。点击这个链接：@VineetShukla谢谢你让我知道。你能告诉我更多的细节吗。嗯..这看起来是一个非常合理的解决方案..现在就试试..会让你满意的know@DipakKeshariya-如果没有看到你尝试了什么，你是如何在你的应用程序中实现这些代码的，我们什么都不能说。请看我的问题，你能告诉我更详细的情况吗？好吧，这看起来是一个非常合理的解决方案。现在就试试吧。我会让你满意的know@DipakKeshariya-如果没有看到你尝试了什么，你是如何在你的应用程序中实现这些代码的，我们什么都不能说。把你的问题作为一个新的问题，除了你得到了什么。请看我的问题，然后按照这个：然后按照这个：