修改:增加了额外的错误和修改到code I提出
我是新来的Java / Android的。我想我的SmartApp类中创建一个AlertDialog当事件在我DataRobot类被激发。这样做的时候,我得到一个错误。该事件被触发,并在SmartApp成功调用该函数,但是当它到达 AlertDialog警报=新AlertDialog.Builder(本).create();
打印以下错误到logcat中。有谁知道我做错了或者更好的方式来实现我想我什么?
logcat的错误:02-05 22:39:27.081:VERBOSE / SmartApp(281):数据警报事件捕获02-05 22:39:27.081:VERBOSE / SmartApp(281):内请将SendAlert02-05 22:39:27.090:警告/ System.err的(281):了java.lang.RuntimeException:无法内螺纹创建的处理程序已经不叫尺蠖prepare()。02-05 22:39:27.122:WARN / System.err的(281):在android.os.Handler<&初始化GT;(Handler.java:121)。02-05 22:39:27.122:WARN / System.err的(281):在android.app.Dialog<&初始化GT;(Dialog.java:101)。02-05 22:39:27.141:WARN / System.err的(281):在android.app.AlertDialog<&初始化GT;(AlertDialog.java:63)。02-05 22:39:27.141:WARN / System.err的(281):在android.app.AlertDialog<&初始化GT;(AlertDialog.java:59)。02-05 22:39:27.161:WARN / System.err的(281):在android.app.AlertDialog $ Builder.create(AlertDialog.java:786)02-05 22:39:27.161:WARN / System.err的(281):在cpe495.smartapp.SmartApp.sendAlert(SmartApp.java:169)02-05 22:39:27.171:WARN / System.err的(281):在cpe495.smartapp.SmartApp $ 3.dataAlertReceived(SmartApp.java:59)02-05 22:39:27.201:WARN / System.err的(281):在cpe495.smartapp.DataRobot.fireDataAlertEvent(DataRobot.java:96)02-05 22:39:27.201:WARN / System.err的(281):在cpe495.smartapp.DataRobot.analyzeData(DataRobot.java:32)02-05 22:39:27.211:WARN / System.err的(281):在cpe495.smartapp.SmartApp $ 1.dataReceivedReceived(SmartApp.java:45)02-05 22:39:27.222:WARN / System.err的(281):在cpe495.smartapp.ConnectDevice.fireDataReceivedEvent(ConnectDevice.java:71)02-05 22:39:27.222:WARN / System.err的(281):在cpe495.smartapp.ConnectDevice.run(ConnectDevice.java:42)02-05 22:39:27.242:WARN / System.err的(281):在java.lang.Thread.run(Thread.java:1096)
//我smartapp类主界面公共类SmartApp扩展活动实现OnShared $ P $ {pferenceChangeListener TextView的smartConnectionStatus; TextView的testOutputView; 螺纹cThread; 私人ConnectDevice CD =新ConnectDevice(); 私人DataRobot的dR =新DataRobot(); 私人DataBuilder分贝=新DataBuilder(); 私人DataSender DS =新DataSender(); / **当第一次创建活动调用。 * / @覆盖 公共无效的onCreate(捆绑savedInstanceState){ super.onCreate(savedInstanceState); 的setContentView(R.layout.intro); cD.addDataReceivedListener(新DataReceivedListener(){ @覆盖 公共无效dataReceivedReceived(DataReceivedEvent事件){ // TODO自动生成方法存根 dR.analyzeData(event.getData()); } }); dR.addDataAlertListener(新DataAlertListener(){ @覆盖 公共无效dataAlertReceived(DataAlertEvent事件){ Log.v(SmartApp,数据警报事件陷入); 请将SendAlert(); } }); } / *发送警报用户已超过压力指数函数* / 公共无效请将SendAlert(){ Log.v(SmartApp,内部请将SendAlert); AlertDialog警报=新AlertDialog.Builder(本).create(); Log.v(SmartApp,助洗剂后); //振动器振动; //振动器=(振动器)getSystemService(Context.VIBRATOR_SERVICE); //vibrator.vibrate(500); alert.setMessage(测试警告对话框......); alert.setCancelable(假); alert.setButton(OK,新DialogInterface.OnClickListener(){ @覆盖 公共无效的onClick(DialogInterface对话,诠释它){ // TODO自动生成方法存根 dialog.cancel(); } }); Log.v(SmartApp,builder2后); // AlertDialog警报= builder.create(); alert.setTitle(标题); Log.v(SmartApp,builder3后); alert.show(); Log.v(SmartApp,builder4后); }}
![AlertDialog对话框](https://p.xsw88.cn/allimgs/daicuo/20230906/3636.png)
// datarobot类公共类DataRobot延伸活动{/ *这个类是分析数据* /私人列表_listeners =新的ArrayList();私人列表< DataAlertListener> _listeners2 =新的ArrayList< DataAlertListener>();私人SmartDataObject数据;私人诠释SI1;私人诠释SI2;私人浮动W1;私人浮动W2;私人浮动W3;私人诠释HRB;私人诠释hRVMin;私人诠释hRVMax;公共布尔analyzeData(SmartDataObject临时){ / *分析数据 *如果成功分析的数据,则返回true *如果出现错误,则返回false * / 数据=温度; 如果(data.getHeartRate()> 290){ fireDataAlertEvent(); } fireDataAnalyzedEvent(数据); 返回true; //现在这将始终返回true}公共同步无效addDataAnalyzedListener(DataAnalyzedListener监听){ _listeners.add(监听);}公共同步无效removeDataAnalyzedListener(DataAnalyzedListener监听){ _listeners.remove(监听);}私人同步无效fireDataAnalyzedEvent(SmartDataObject临时){ DataAnalyzedEvent DRE =新DataAnalyzedEvent(这一点,温度); 迭代器监听= _listeners.iterator(); 而(listeners.hasNext()){ ((DataAnalyzedListener)listeners.next())dataAnalyzedReceived(DRE)。 }}公共接口DataAnalyzedListener { 公共无效dataAnalyzedReceived(DataAnalyzedEvent事件);}公共同步无效addDataAlertListener(DataAlertListener监听){ _listeners2.add(监听);}公共同步无效removeDataAlertListener(DataAlertListener监听){ _listeners2.remove(监听);}私人同步无效fireDataAlertEvent(){ DataAlertEvent DAE =新DataAlertEvent(本); 迭代器监听= _listeners2.iterator(); 而(listeners.hasNext()){ ((DataAlertListener)listeners.next())dataAlertReceived(DAE)。 }}公共接口DataAlertListener { 公共无效dataAlertReceived(DataAlertEvent事件);}}
公共类DataAlertEvent扩展的EventObject { 公共DataAlertEvent(对象源){ 超(源); // TODO自动生成构造函数存根 }}
下面是试图修复后加code
10月2日至6日:27:30.673:VERBOSE / SmartApp(276):数据警报事件捕获10月2日至六日:27:31.013:警告/ System.err的(276):了java.lang.RuntimeException:无法内螺纹创建的处理程序已经不叫尺蠖prepare()。10月2日至六日:27:31.042:WARN / System.err的(276):在android.os.Handler<&初始化GT;(Handler.java:121)。10月2日至六日:27:31.052:WARN / System.err的(276):在android.view.ViewRoot<&初始化GT;(ViewRoot.java:231)。10月2日至六日:27:31.052:WARN / System.err的(276):在android.view.WindowManagerImpl.addView(WindowManagerImpl.java:148)10月2日至六日:27:31.062:WARN / System.err的(276):在android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)10月2日至六日:27:31.082:WARN / System.err的(276):在android.view.Window $ LocalWindowManager.addView(Window.java:424)10月2日至六日:27:31.082:WARN / System.err的(276):在android.app.Dialog.show(Dialog.java:241)10月2日至六日:27:31.102:WARN / System.err的(276):在cpe495.smartapp.SmartApp $ 4.dataAlertReceived(SmartApp.java:80)10月2日至六日:27:31.102:WARN / System.err的(276):在cpe495.smartapp.DataRobot.fireDataAlertEvent(DataRobot.java:96)10月2日至六日:27:31.122:WARN / System.err的(276):在cpe495.smartapp.DataRobot.analyzeData(DataRobot.java:32)10月2日至六日:27:31.122:WARN / System.err的(276):在cpe495.smartapp.SmartApp $ 2.dataReceivedReceived(SmartApp.java:66)10月2日至六日:27:31.133:WARN / System.err的(276):在cpe495.smartapp.ConnectDevice.fireDataReceivedEvent(ConnectDevice.java:71)10月2日至六日:27:31.133:WARN / System.err的(276):在cpe495.smartapp.ConnectDevice.run(ConnectDevice.java:42)10月2日至六日:27:31.153:WARN / System.err的(276):在java.lang.Thread.run(Thread.java:1096)
公共类SmartApp扩展活动实现OnShared $ P $ {pferenceChangeListener TextView的smartConnectionStatus; TextView的testOutputView; 螺纹cThread; 私人ConnectDevice CD =新ConnectDevice(); 私人DataRobot的dR =新DataRobot(); 私人DataBuilder分贝=新DataBuilder(); 私人DataSender DS =新DataSender(); / **当第一次创建活动调用。 * / @覆盖 公共无效的onCreate(捆绑savedInstanceState){ super.onCreate(savedInstanceState); 的setContentView(R.layout.intro); 最后AlertDialog警报=新AlertDialog.Builder(本).create(); Log.v(SmartApp,内部请将SendAlert); // AlertDialog警报=新AlertDialog.Builder(本).create(); Log.v(SmartApp,助洗剂后); //振动器振动; //振动器=(振动器)getSystemService(Context.VIBRATOR_SERVICE); //vibrator.vibrate(500); alert.setMessage(测试警告对话框......); alert.setCancelable(假); alert.setButton(OK,新DialogInterface.OnClickListener(){ @覆盖 公共无效的onClick(DialogInterface对话,诠释它){ // TODO自动生成方法存根 dialog.cancel(); } }); Log.v(SmartApp,builder2后); // AlertDialog警报= builder.create(); alert.setTitle(标题); cD.addDataReceivedListener(新DataReceivedListener(){ @覆盖 公共无效dataReceivedReceived(DataReceivedEvent事件){ // TODO自动生成方法存根 dR.analyzeData(event.getData()); } }); dR.addDataAlertListener(新DataAlertListener(){ @覆盖 公共无效dataAlertReceived(DataAlertEvent事件){ Log.v(SmartApp,数据警报事件陷入); 请将SendAlert(); alert.show(); } }); }}
解决方案
您必须创建在UI线程自动显示警告对话框,或:
创建UI线程处理程序。
处理程序mHandler =新的处理程序();
创建一个线程
A类实现Runnable { 公共无效的run(){ //此处创建和显示警告 }}
当事件被激活,请致电:
A A =新的A();mHandler.post(一);
EDIT: Added an additional error and the revision to the code i made.
I am new to java/android. I am trying to create an AlertDialog inside my SmartApp class when an event is fired in my DataRobot class. I am getting an error when doing this. The event is firing and calling the function successfully in SmartApp, but when it gets to AlertDialog alert = new AlertDialog.Builder(this).create();
the following error is printed to logcat. Does anyone know what i am doing wrong or a better way to implement what i am wanting?
Logcat error:
02-05 22:39:27.081: VERBOSE/SmartApp(281): data alert event caught
02-05 22:39:27.081: VERBOSE/SmartApp(281): inside sendalert
02-05 22:39:27.090: WARN/System.err(281): java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
02-05 22:39:27.122: WARN/System.err(281): at android.os.Handler.<init>(Handler.java:121)
02-05 22:39:27.122: WARN/System.err(281): at android.app.Dialog.<init>(Dialog.java:101)
02-05 22:39:27.141: WARN/System.err(281): at android.app.AlertDialog.<init>(AlertDialog.java:63)
02-05 22:39:27.141: WARN/System.err(281): at android.app.AlertDialog.<init>(AlertDialog.java:59)
02-05 22:39:27.161: WARN/System.err(281): at android.app.AlertDialog$Builder.create(AlertDialog.java:786)
02-05 22:39:27.161: WARN/System.err(281): at cpe495.smartapp.SmartApp.sendAlert(SmartApp.java:169)
02-05 22:39:27.171: WARN/System.err(281): at cpe495.smartapp.SmartApp$3.dataAlertReceived(SmartApp.java:59)
02-05 22:39:27.201: WARN/System.err(281): at cpe495.smartapp.DataRobot.fireDataAlertEvent(DataRobot.java:96)
02-05 22:39:27.201: WARN/System.err(281): at cpe495.smartapp.DataRobot.analyzeData(DataRobot.java:32)
02-05 22:39:27.211: WARN/System.err(281): at cpe495.smartapp.SmartApp$1.dataReceivedReceived(SmartApp.java:45)
02-05 22:39:27.222: WARN/System.err(281): at cpe495.smartapp.ConnectDevice.fireDataReceivedEvent(ConnectDevice.java:71)
02-05 22:39:27.222: WARN/System.err(281): at cpe495.smartapp.ConnectDevice.run(ConnectDevice.java:42)
02-05 22:39:27.242: WARN/System.err(281): at java.lang.Thread.run(Thread.java:1096)
//my smartapp class main ui
public class SmartApp extends Activity implements OnSharedPreferenceChangeListener {
TextView smartConnectionStatus;
TextView testOutputView;
Thread cThread;
private ConnectDevice cD = new ConnectDevice();
private DataRobot dR = new DataRobot();
private DataBuilder dB = new DataBuilder();
private DataSender dS = new DataSender();
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.intro);
cD.addDataReceivedListener(new DataReceivedListener() {
@Override
public void dataReceivedReceived(DataReceivedEvent event) {
// TODO Auto-generated method stub
dR.analyzeData(event.getData());
}
});
dR.addDataAlertListener(new DataAlertListener() {
@Override
public void dataAlertReceived(DataAlertEvent event) {
Log.v("SmartApp", "data alert event caught");
sendAlert();
}
});
}
/* Function for sending alerts that the user has exceeded a stress index */
public void sendAlert() {
Log.v("SmartApp", "inside sendalert");
AlertDialog alert = new AlertDialog.Builder(this).create();
Log.v("SmartApp", "after builder1");
//Vibrator vibrator;
//vibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
//vibrator.vibrate(500);
alert.setMessage("Testing alert dialog...");
alert.setCancelable(false);
alert.setButton("Ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
dialog.cancel();
}
});
Log.v("SmartApp", "after builder2");
//AlertDialog alert = builder.create();
alert.setTitle("Title");
Log.v("SmartApp", "after builder3");
alert.show();
Log.v("SmartApp", "after builder4");
}
}
// datarobot class
public class DataRobot extends Activity {
/* This class is for analyzing the data */
private List _listeners = new ArrayList();
private List<DataAlertListener> _listeners2 = new ArrayList<DataAlertListener>();
private SmartDataObject data;
private int sI1;
private int sI2;
private float w1;
private float w2;
private float w3;
private int hRB;
private int hRVMin;
private int hRVMax;
public boolean analyzeData(SmartDataObject temp) {
/* Analyze the data
* Returns true if data was successfully analyzed
* Returns false if an error occurred
*/
data = temp;
if(data.getHeartRate()>290) {
fireDataAlertEvent();
}
fireDataAnalyzedEvent(data);
return true; //for now this will always return true
}
public synchronized void addDataAnalyzedListener(DataAnalyzedListener listener) {
_listeners.add(listener);
}
public synchronized void removeDataAnalyzedListener(DataAnalyzedListener listener) {
_listeners.remove(listener);
}
private synchronized void fireDataAnalyzedEvent(SmartDataObject temp) {
DataAnalyzedEvent dRE = new DataAnalyzedEvent(this, temp);
Iterator listeners = _listeners.iterator();
while(listeners.hasNext()) {
((DataAnalyzedListener)listeners.next()).dataAnalyzedReceived(dRE);
}
}
public interface DataAnalyzedListener {
public void dataAnalyzedReceived(DataAnalyzedEvent event);
}
public synchronized void addDataAlertListener(DataAlertListener listener) {
_listeners2.add(listener);
}
public synchronized void removeDataAlertListener(DataAlertListener listener) {
_listeners2.remove(listener);
}
private synchronized void fireDataAlertEvent() {
DataAlertEvent dAE = new DataAlertEvent(this);
Iterator listeners = _listeners2.iterator();
while(listeners.hasNext()) {
((DataAlertListener)listeners.next()).dataAlertReceived(dAE);
}
}
public interface DataAlertListener {
public void dataAlertReceived(DataAlertEvent event);
}
}
public class DataAlertEvent extends EventObject {
public DataAlertEvent(Object source) {
super(source);
// TODO Auto-generated constructor stub
}
}
Below is the added code after trying to fix
02-06 10:27:30.673: VERBOSE/SmartApp(276): data alert event caught
02-06 10:27:31.013: WARN/System.err(276): java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
02-06 10:27:31.042: WARN/System.err(276): at android.os.Handler.<init>(Handler.java:121)
02-06 10:27:31.052: WARN/System.err(276): at android.view.ViewRoot.<init>(ViewRoot.java:231)
02-06 10:27:31.052: WARN/System.err(276): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:148)
02-06 10:27:31.062: WARN/System.err(276): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
02-06 10:27:31.082: WARN/System.err(276): at android.view.Window$LocalWindowManager.addView(Window.java:424)
02-06 10:27:31.082: WARN/System.err(276): at android.app.Dialog.show(Dialog.java:241)
02-06 10:27:31.102: WARN/System.err(276): at cpe495.smartapp.SmartApp$4.dataAlertReceived(SmartApp.java:80)
02-06 10:27:31.102: WARN/System.err(276): at cpe495.smartapp.DataRobot.fireDataAlertEvent(DataRobot.java:96)
02-06 10:27:31.122: WARN/System.err(276): at cpe495.smartapp.DataRobot.analyzeData(DataRobot.java:32)
02-06 10:27:31.122: WARN/System.err(276): at cpe495.smartapp.SmartApp$2.dataReceivedReceived(SmartApp.java:66)
02-06 10:27:31.133: WARN/System.err(276): at cpe495.smartapp.ConnectDevice.fireDataReceivedEvent(ConnectDevice.java:71)
02-06 10:27:31.133: WARN/System.err(276): at cpe495.smartapp.ConnectDevice.run(ConnectDevice.java:42)
02-06 10:27:31.153: WARN/System.err(276): at java.lang.Thread.run(Thread.java:1096)
public class SmartApp extends Activity implements OnSharedPreferenceChangeListener {
TextView smartConnectionStatus;
TextView testOutputView;
Thread cThread;
private ConnectDevice cD = new ConnectDevice();
private DataRobot dR = new DataRobot();
private DataBuilder dB = new DataBuilder();
private DataSender dS = new DataSender();
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.intro);
final AlertDialog alert = new AlertDialog.Builder(this).create();
Log.v("SmartApp", "inside sendalert");
//AlertDialog alert = new AlertDialog.Builder(this).create();
Log.v("SmartApp", "after builder1");
//Vibrator vibrator;
//vibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
//vibrator.vibrate(500);
alert.setMessage("Testing alert dialog...");
alert.setCancelable(false);
alert.setButton("Ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
dialog.cancel();
}
});
Log.v("SmartApp", "after builder2");
//AlertDialog alert = builder.create();
alert.setTitle("Title");
cD.addDataReceivedListener(new DataReceivedListener() {
@Override
public void dataReceivedReceived(DataReceivedEvent event) {
// TODO Auto-generated method stub
dR.analyzeData(event.getData());
}
});
dR.addDataAlertListener(new DataAlertListener() {
@Override
public void dataAlertReceived(DataAlertEvent event) {
Log.v("SmartApp", "data alert event caught");
sendAlert();
alert.show();
}
});
}
}
解决方案
You must create and show alert dialog in UI thread or:
Create a Handler in UI thread.
Handler mHandler = new Handler();
Create a thread
class A implements Runnable {
public void run() {
// create and show alert here
}
}
When event is fired, call:
A a = new A();
mHandler.post(a);
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