Android でこのエラーが発生していますが、これToastを理解できません。
05-23 03:22:33.415: E/AndroidRuntime(706): FATAL EXCEPTION: AsyncTask #1
05-23 03:22:33.415: E/AndroidRuntime(706): java.lang.RuntimeException: An error occured while executing doInBackground()
05-23 03:22:33.415: E/AndroidRuntime(706): at android.os.AsyncTask$3.done(AsyncTask.java:278)
05-23 03:22:33.415: E/AndroidRuntime(706): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
05-23 03:22:33.415: E/AndroidRuntime(706): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
05-23 03:22:33.415: E/AndroidRuntime(706): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
05-23 03:22:33.415: E/AndroidRuntime(706): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
05-23 03:22:33.415: E/AndroidRuntime(706): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208)
05-23 03:22:33.415: E/AndroidRuntime(706): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
05-23 03:22:33.415: E/AndroidRuntime(706): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
05-23 03:22:33.415: E/AndroidRuntime(706): at java.lang.Thread.run(Thread.java:864)
05-23 03:22:33.415: E/AndroidRuntime(706): Caused by: java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
05-23 03:22:33.415: E/AndroidRuntime(706): at android.os.Handler.<init>(Handler.java:121)
05-23 03:22:33.415: E/AndroidRuntime(706): at android.widget.Toast$TN.<init>(Toast.java:317)
05-23 03:22:33.415: E/AndroidRuntime(706): at android.widget.Toast.<init>(Toast.java:91)
05-23 03:22:33.415: E/AndroidRuntime(706): at android.widget.Toast.makeText(Toast.java:233)
05-23 03:22:33.415: E/AndroidRuntime(706): at com.example.devicecontrolpanel.TestActivity$DeviceSearcher.executed(TestActivity.java:482)
05-23 03:22:33.415: E/AndroidRuntime(706): at com.example.devicecontrolpanel.TestActivity$DeviceSearcher.doInBackground(TestActivity.java:289)
05-23 03:22:33.415: E/AndroidRuntime(706): at com.example.devicecontrolpanel.TestActivity$DeviceSearcher.doInBackground(TestActivity.java:1)
05-23 03:22:33.415: E/AndroidRuntime(706): at android.os.AsyncTask$2.call(AsyncTask.java:264)
05-23 03:22:33.415: E/AndroidRuntime(706): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
05-23 03:22:33.415: E/AndroidRuntime(706): ... 5 more
コードが大きすぎるので、その一部を投稿しています。
if(!set.getCheckComputer() && !set.getCheckFlyport() && !set.getCheckRaspberry())
executed(); //Line number: 289
public void executed()
{
DataBaseAdapter db = new DataBaseAdapter(getApplicationContext());
List<DeviceInformation> oldDevices;
if(deviceList.size()>0)
oldDevices = db.getNotAllDevices(deviceList);
else
oldDevices = null;
if(oldDevices!=null)
{
...
...
}
else
{
TableRow tr = new TableRow(getApplicationContext());
tr.setLayoutParams(layoutParam);
TextView tv = new TextView(getApplicationContext());
tv.setTextSize(17);
tv.setLayoutParams(layoutParam);
if(rowCounter!=0)
tv.setText("No device were added before");
tv.setVisibility(View.VISIBLE);
tv.setTextColor(Color.WHITE);
tr.addView(tv);
tr.setBackgroundColor(Color.BLACK);
tr.setVisibility(View.VISIBLE);
deviceTable.addView(tr);
Toast.makeText(getApplicationContext(), "No Devices Found", Toast.LENGTH_LONG).show();
//Error in above line
}
}