我想通過使用savedInstance和Bundle更改屏幕方向時嘗試補償我的列表項,但不斷收到多個java.lang.ClassNotFoundException錯誤。當我遍歷代碼時,它似乎將項目添加到包中,但是當我在調試模式下嘗試查看它時,它顯示java.lang.ClassNotFoundException錯誤。我想指出「ts」的可序列化值顯示相同的錯誤,但是當我旋轉屏幕時,原始時間會保持不變。找不到定向更改的已保存實例類
我真的不知道發生了什麼,任何幫助表示讚賞。
主要活動//
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_li_summary);
getWindow().setSoftInputMode(
WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
if (savedInstanceState != null)
{
if ((savedInstanceState != null) && (savedInstanceState.getSerializable("ts") != null))
{
startTime = (Calendar) savedInstanceState.getSerializable("starttime");
String samp = (String) savedInstanceState.getSerializable("ts");
refreshTS = (TextView) findViewById(R.id.timeStamp);
refreshTS.setText(samp);
String[] values = savedInstanceState.getStringArray("listItems");
if (values != null) {
for (int i = 0; i< values.length; i++) {
mMainListAdapter.add(values[i]);
}
}
}
}
}
savedInstance //
@Override
protected void onSaveInstanceState(Bundle state) {
super.onSaveInstanceState(state);
state.putSerializable("starttime", startTime);
state.putSerializable("ts",refreshTS.getText().toString());
ArrayList<String> values = new ArrayList<String>() ;
for (int i =0; i< mMainListAdapter.getCount(); i++)
{
String obj = mMainListAdapter.getItem(i);
values.add(obj);
}
state.putStringArrayList("listItems", values);
}
堆棧跟蹤//
06-05 07:27:08.394 13901-13901/commyapp.myapp W/Bundle﹕ Attempt to cast generated internal exception:
java.lang.ClassCastException: java.util.ArrayList cannot be cast to java.lang.String[]
at android.os.Bundle.getStringArray(Bundle.java:1565)
at commyapp.myapp.Summary.onCreate(Summary.java:90)
at android.app.Activity.performCreate(Activity.java:5600)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1093)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2504)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2599)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4218)
at android.app.ActivityThread.access$1000(ActivityThread.java:174)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1327)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5748)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1291)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1107)
at dalvik.system.NativeStart.main(Native Method)
你有ClassNotFoundException的堆棧跟蹤? – lordoku
不相關,並且不太可能與崩潰相關,您檢查savedInstanceState爲空兩次,可以刪除它。 – Zadrox
您是否正確實現了Serializable? – Gosu