我正在使用Gridview在内部显示一些TextView。我创建了一个清除按钮,用新的ArrayList设置一个新的适配器,它工作正常。当我尝试在另一个地方执行相同的操作时,会发生异常。我已经跟踪了所有代码,直到我指出导致问题的陈述。
在类的第一个声明gridview
GridView gridView;
在OnCreate方法中获得了引用
gridView = (GridView) findViewById(R.id.gridView1);
创建adpater
String[] arrayEmpty = new String[] {"", "", "", "", "", "", "", "", ""};
ArrayList<String> list = new ArrayList<String>(Arrays.asList(arrayEmpty));
gridView.setAdapter(new ArrayAdapter<String>(this,R.layout.list_item,list));//list_item is acustomized layout for the TextView
我在Clear()方法中做了什么并且工作正常:
gridView.setAdapter(new ArrayAdapter<String>(MainActivity.this,R.layout.list_item,listEmpty));
我正在做什么来设置值并且不工作:
ArrayList<String> gridList= new ArrayList<String>();
for(int i=0;i<3;i++){
for(int j=0;j<3;j++){
gridList.add(String.valueOf(e[i][j].getValue()));
}
}
//The next statement cause an Exception..Why!!?
gridView.setAdapter(new ArrayAdapter<String>(MainActivity.this,R.layout.list_item,gridList));
class solveTask extends AsyncTask<Object, Void, String> {
@Override
protected void onPreExecute() {
ProgressDialog pd = new ProgressDialog(MainActivity.this);
pd.setProgress(ProgressDialog.STYLE_SPINNER);
pd.setMessage("Solving, please wait a few seconds...");
pd.setIndeterminate(true);
pd.setCancelable(false);
pd.show();
}
@Override
protected String doInBackground(Object... parametros) {
MainActivity.this.runOnUiThread(new Runnable() {
public void run() {
fillSudoku();
solve();
}
});
return null;
}
@Override
protected void onPostExecute(String result)
{ //update progressDialog here
pd.dismiss();
}
}
部分日志:
04-27 10:24:04.556:W / dalvikvm(7823):threadid = 9:线程退出 未捕获的异常(组= 0x40015560)04-27 10:24:04.586: E / AndroidRuntime(7823):致命异常:AsyncTask#1 04-27 10:24:04.586:E / AndroidRuntime(7823):java.lang.RuntimeException:An 执行doInBackground时发生错误()04-27 10:24:04.586: E / AndroidRuntime(7823):at android.os.AsyncTask $ 3.done(AsyncTask.java:200)04-27 10:24:04.586: E / AndroidRuntime(7823):at java.util.concurrent.FutureTask中$ Sync.innerSetException(FutureTask.java:274) 04-27 10:24:04.586:E / AndroidRuntime(7823):at java.util.concurrent.FutureTask.setException(FutureTask.java:125) 04-27 10:24:04.586:E / AndroidRuntime(7823):at java.util.concurrent.FutureTask中$ Sync.innerRun(FutureTask.java:308) 04-27 10:24:04.586:E / AndroidRuntime(7823):at java.util.concurrent.FutureTask.run(FutureTask.java:138)04-27 10:24:04.586:E / AndroidRuntime(7823):at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088) 04-27 10:24:04.586:E / AndroidRuntime(7823):at java.util.concurrent.ThreadPoolExecutor中的$ Worker.run(ThreadPoolExecutor.java:581) 04-27 10:24:04.586:E / AndroidRuntime(7823):at java.lang.Thread.run(Thread.java:1019)04-27 10:24:04.586: E / AndroidRuntime(7823):引起: java.lang.UnsupportedOperationException:removeAllViews()不是 AdapterView 04-27 10:24:04.586:E / AndroidRuntime(7823)支持: 在android.widget.AdapterView.removeAllViews(AdapterView.java:511) 04-27 10:24:04.586:E / AndroidRuntime(7823):at com.etaworx.thesudokusolver.MainActivity.printSudoku(MainActivity.java:481) 04-27 10:24:04.586:E / AndroidRuntime(7823):at com.etaworx.thesudokusolver.MainActivity.solve(MainActivity.java:579) 04-27 10:24:04.586:E / AndroidRuntime(7823):at com.etaworx.thesudokusolver.MainActivity $ solveTask.doInBackground(MainActivity.java:625) 04-27 10:24:04.586:E / AndroidRuntime(7823):at com.etaworx.thesudokusolver.MainActivity $ solveTask.doInBackground(MainActivity.java:1) 04-27 10:24:04.586:E / AndroidRuntime(7823):at android.os.AsyncTask $ 2.call(AsyncTask.java:185)04-27 10:24:04.586: E / AndroidRuntime(7823):at java.util.concurrent.FutureTask中$ Sync.innerRun(FutureTask.java:306) 04-27 10:24:04.586:E / AndroidRuntime(7823):... 4更多04-27 10:24:09.849:E / WindowManager(7823):活动 com.etaworx.thesudokusolver.MainActivity泄露了窗口 com.android.internal.policy.impl.PhoneWindow$DecorView@4054e258那个 最初添加到这里04-27 10:24:09.849:E / WindowManager(7823): android.view.WindowLeaked:Activity com.etaworx.thesudokusolver.MainActivity泄露了窗口 com.android.internal.policy.impl.PhoneWindow$DecorView@4054e258那个 最初添加到这里04-27 10:24:09.849:E / WindowManager(7823): 在android.view.ViewRoot。(ViewRoot.java:258)04-27 10:24:09.849:E / WindowManager(7823):at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:148) 04-27 10:24:09.849:E / WindowManager(7823):at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91) 04-27 10:24:09.849:E / WindowManager(7823):at android.view.Window $ LocalWindowManager.addView(Window.java:424)04-27 10:24:09.849:E / WindowManager(7823):at android.app.Dialog.show(Dialog.java:241)04-27 10:24:09.849: E / WindowManager(7823):at com.etaworx.thesudokusolver.MainActivity.showLoading(MainActivity.java:570) 04-27 10:24:09.849:E / WindowManager(7823):at com.etaworx.thesudokusolver.MainActivity $ 2.onClick(MainActivity.java:77) 04-27 10:24:09.849:E / WindowManager(7823):at android.view.View.performClick(View.java:2485)04-27 10:24:09.849: E / WindowManager(7823):at android.view.View $ PerformClick.run(View.java:9080)04-27 10:24:09.849: E / WindowManager(7823):at android.os.Handler.handleCallback(Handler.java:587)04-27 10:24:09.849:E / WindowManager(7823):at android.os.Handler.dispatchMessage(Handler.java:92)04-27 10:24:09.849:E / WindowManager(7823):at android.os.Looper.loop(Looper.java:123)04-27 10:24:09.849: E / WindowManager(7823):at android.app.ActivityThread.main(ActivityThread.java:3683)04-27 10:24:09.849:E / WindowManager(7823):at java.lang.reflect.Method.invokeNative(Native Method)04-27 10:24:09.849:E / WindowManager(7823):at java.lang.reflect.Method.invoke(Method.java:507)04-27 10:24:09.849: E / WindowManager(7823):at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:839) 04-27 10:24:09.849:E / WindowManager(7823):at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)04-27 10:24:09.849:E / WindowManager(7823):at dalvik.system.NativeStart.main(原生方法)
答案 0 :(得分:1)
我认为solve();
函数在主线程上运行,doinbackground()在后台线程上运行。像这样改变你的solve()函数
@Override
protected String doInBackground(Object... parametros) {
this.runOnUiThread(new Runnable() {
public void run() {
solve();
}
});
return null;
}
答案 1 :(得分:1)