我在启动应用程序时一次又一次地出现 close（）从未明确调用的错误。我不明白我在数据库中的位置错误。
这是我的代码
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mLayout = (MainLayout) this.getLayoutInflater().inflate(R.layout.all_post, null);
setContentView(mLayout);
dbhelper = new MyDbHelper(this);
imgLeftmenu = (ImageView) findViewById(R.id.imgLeftMenu);
imgSearch = (ImageView) findViewById(R.id.imgSearch);
imgAdd = (ImageView) findViewById(R.id.imgAdd);
listView = (ListView) findViewById(R.id.listview_AllPost);
populateList();
new GetgetDoenLoaddata().execute();
SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
str_Authentication_Token = sharedPreferences.getString("strAuthentication_Token", "");
str_UserId = sharedPreferences.getString("strUserId", "");
Log.e("Prefs", "str_Authentication_Token = " + str_Authentication_Token + "Prefs str_UserId = " + str_UserId);
SQLiteDatabase db = dbhelper.getWritableDatabase();
String query = "select * from SyncTime where WebServiceEntity ='" + "AllPost_ActivityList" + "'";
Cursor cursor = db.rawQuery(query, null);
while (cursor.moveToNext()) {
strSyncTime = cursor.getString(cursor.getColumnIndex("SyncTime"));
strSyncTime1 = strSyncTime.replaceAll(" ", "%20");
Log.e("strSyncTime ", " = " + strSyncTime1);
}
cursor.close();
Intent intent = getIntent();
String newAudioFile = intent.getStringExtra("newAudioFile");
Log.e("newAudioFile ", " = " + newAudioFile);
imgAdd.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(AllPosts_Page.this, AddPost.class);
startActivity(i);
}
});
imgSearch.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
}
private void populateList() {
descArray.clear();
List<All_Post> allDesc = dbhelper.getAllDescriptions();
for (All_Post all_Post : allDesc) {
descArray.add(all_Post);
}
if (adapter == null) {
adapter = new MyListAdapter(this, R.layout.all_post_row, descArray);
listView.setAdapter(adapter);
Log.e("Single Entry ", " !!!! ");
} else if (adapter != null) {
adapter.notifyDataSetChanged();
Log.e("Double Entry ", " !!!! ");
adapter = new MyListAdapter(this, R.layout.all_post_row, descArray);
listView.setAdapter(adapter);
}
}
@Override
protected void onResume() {
super.onResume();
populateList();
}
@Override
protected void onDestroy() {
super.onDestroy();
if (dbhelper != null) {
dbhelper.close();
}
}
public void getDoenLoaddata() {
dbhelper = new MyDbHelper(this);
SQLiteDatabase db1 = dbhelper.getWritableDatabase();
Cursor cursor = db1.rawQuery("select * from ActivityObjectList", null);
if (cursor.moveToFirst()) {
do {
imageName = cursor.getString(cursor.getColumnIndex("imageaudioPath"));
String strDownLoadStatus = cursor.getString(cursor.getColumnIndex("DownLoad_Status"));
if (strDownLoadStatus.equalsIgnoreCase("0")) {
if (imageName.endsWith(mp3_Pattern)) {
str_DownLoadUrl = namespace + "/DownloadFile/FileName/" + imageName;
DownLoadAudioFile(str_DownLoadUrl, imageName);
strDownLoadStatus = "1";
dbhelper.update_DownLoadStatus(imageName, strDownLoadStatus);
}
if (imageName.endsWith(png_Pattern) || imageName.endsWith(jpg_pattern) || imageName.endsWith(bmp_pattern) || imageName.endsWith(gif_pattern) || imageName.endsWith(jpeg_pattern)) {
str_DownLoadUrl = namespace + "/DownloadFile/FileName/" + imageName;
download_PngFile(str_DownLoadUrl, imageName);
strDownLoadStatus = "1";
dbhelper.update_DownLoadStatus(imageName, strDownLoadStatus);
}
}
}
while (cursor.moveToNext());
}
cursor.close();
//db1.close();
}
private void initiatePopupWindow() {
try {
Log.e("string_ActivityId ", " = " + string_ActivityId);
dbhelper = new MyDbHelper(this);
SQLiteDatabase db = dbhelper.getReadableDatabase();
Cursor cursor1 = db.rawQuery("select * from ALL_Post where ActivityId " + "= ? ", new String[]{string_ActivityId});
if (cursor1.moveToFirst()) {
struserId1 = cursor1.getString(cursor1.getColumnIndex("UserId"));
strobjectId1 = cursor1.getString(cursor1.getColumnIndex("VesselId"));
Log.e("initiatePopupWindow ", "onCameraclick strobjectId1 = " + strobjectId1);
Log.e("initiatePopupWindow ", "onCameraclickt struserId1 = " + struserId1);
}
cursor1.close();
db.close();
LayoutInflater inflater = (LayoutInflater) AllPosts_Page.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View layout = inflater.inflate(R.layout.camera_popup, (ViewGroup) findViewById(R.id.popup_element));
pwindo = new PopupWindow(layout, 600, 380, true);
pwindo.showAtLocation(layout, Gravity.BOTTOM, 0, 0);
pwindo.setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));
btnCamera = (Button) layout.findViewById(R.id.button_Camera);
btnCamera.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, CAMERA_REQUEST);
}
});
btnGallery = (Button) layout.findViewById(R.id.button_Gallery);
btnGallery.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent galleryIntent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(galleryIntent, RESULT_LOAD_IMG);
}
});
cancelPopUp = (Button) layout.findViewById(R.id.btnCancelCamera);
cancelPopUp.setOnClickListener(cancel_button_click_listener);
} catch (Exception e) {
e.printStackTrace();
}
}
class MyListAdapter extends ArrayAdapter<All_Post> {
Context context;
int layoutResourceId;
/**/
ArrayList<All_Post> data = new ArrayList<All_Post>();
public MyListAdapter(Context context, int layoutResourceId, ArrayList<All_Post> data) {
super(context, layoutResourceId, data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
}
@Override
public int getCount() {
return data.size();
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
View row = convertView;
final Holder holder;
if (row == null) {
LayoutInflater vi;
vi = LayoutInflater.from(getContext());
row = vi.inflate(R.layout.all_post_row, null);
holder = new Holder();
holder.text_ActivityId = (TextView) row.findViewById(R.id.textActivityId);
holder.text_InspectorName = (TextView) row.findViewById(R.id.textInspectorName);
holder.text_SpChar = (TextView) row.findViewById(R.id.textSpChar);
holder.text_Notation = (TextView) row.findViewById(R.id.textNotation);
holder.txtViewDate = (TextView) row.findViewById(R.id.txt_Date);
holder.txtInitialLetter = (TextView) row.findViewById(R.id.txt_InitialLetter);
holder.txtRemark = (TextView) row.findViewById(R.id.textRemark);
holder.imgBtn_FollowUp = (ImageView) row.findViewById(R.id.imgButton_FoloowUp);
holder.imgBtn_RateEquipMent = (ImageView) row.findViewById(R.id.imgButtonRateEquipment);
holder.imgBtn_Camera = (ImageView) row.findViewById(R.id.imgButton_Camera);
holder.imgBtn_Audio = (ImageView) row.findViewById(R.id.imgButton_RecordAudio);
holder.horizontalScrollView = (HorizontalScrollView) row.findViewById(R.id.hlist);
holder.lLinearLayout = (LinearLayout) row.findViewById(R.id.innerlay);
row.setTag(holder);
} else {
holder = (Holder) row.getTag();
}
final All_Post all_Post = data.get(position);
holder.text_ActivityId.setText(all_Post.getStrActivityId());
holder.text_InspectorName.setText(all_Post.getStringInspectorname());
String typenameRGN = all_Post.getStrShortName();
Log.e("typenameRGN ", " = " + typenameRGN);
holder.txtInitialLetter.setText(typenameRGN);
if (holder.txtInitialLetter.getText().toString().equals("R")) {
holder.txtInitialLetter.setBackgroundResource(R.drawable.red_circle_shape);
}
if (holder.txtInitialLetter.getText().toString().equals("G")) {
holder.txtInitialLetter.setBackgroundResource(R.drawable.green_circle_shape);
}
if (holder.txtInitialLetter.getText().toString().equals("N")) {
holder.txtInitialLetter.setBackgroundResource(R.drawable.blue_circle_shape);
}
holder.txtRemark.setText(all_Post.getStrRemark());
holder.text_Notation.setText(all_Post.getStrNotationNo());
String strtextNotation = holder.text_Notation.getText().toString().trim();
Log.e("strtextNotation ", " = " + strtextNotation);
holder.txtViewDate.setText(all_Post.getActiondate());
strListItem_ActivityId = all_Post.getStrActivityId();
Log.e("strListItem_ActivityId ", " = " + strListItem_ActivityId);
dbhelper = new MyDbHelper(AllPosts_Page.this);
SQLiteDatabase db = dbhelper.getReadableDatabase();
Cursor cursor = db.rawQuery("select * from ActivityObjectList where activityId " + "= ? ", new String[]{strListItem_ActivityId});
imageArray.clear();
if (cursor.moveToFirst()) {
do {
String imagePath = cursor.getString(cursor.getColumnIndex("imageaudioPath"));
imageArray.add(imagePath);
}
while (cursor.moveToNext());
}
cursor.close();
//db.close();
//OnClickListener for camera button in the List
holder.imgBtn_Camera.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
string_ActivityId = all_Post.getStrActivityId();
initiatePopupWindow();
}
});
final String actid = all_Post.getStrActivityId();
dbhelper = new MyDbHelper(context);
db = dbhelper.getReadableDatabase();
Cursor cursor1 = db.rawQuery("select * from ALL_Post where activityId ='" + actid + "'", null);
if (cursor1.moveToFirst()) {
do {
String strStarFlag = cursor1.getString(cursor1.getColumnIndex("StarFlag"));
Log.e("strStarFlag ", " is = " + strStarFlag);
if (strStarFlag.equals("0")) {
holder.imgBtn_RateEquipMent.setImageResource(R.drawable.stargrey_new);
} else if (strStarFlag.equals("1")) {
holder.imgBtn_RateEquipMent.setImageResource(R.drawable.yellow_star);
}
}
while (cursor1.moveToNext());
}
cursor1.close();
db.close();
return row;
}
}
private class GetgetDoenLoaddata extends AsyncTask<Void, Void, Void> {
@Override
protected Void doInBackground(Void... arg0) {
getDoenLoaddata();
return null;
}
}
}
这是我的logcat
E / SQLiteDatabase：从未在数据库上显式调用close（） '/data/data/com.example.tazeen.classnkk/databases/ClassNKK' android.database.sqlite.DatabaseObjectNotClosedException：应用程序没有关闭光标或数据库对象 在这里开了 在android.database.sqlite.SQLiteDatabase。（SQLiteDatabase.java:1943） 在android.database.sqlite.SQLiteDatabase.openDatabase（SQLiteDatabase.java:1007） 在android.database.sqlite.SQLiteDatabase.openDatabase（SQLiteDatabase.java:986） 在android.database.sqlite.SQLiteDatabase.openOrCreateDatabase（SQLiteDatabase.java:1051） 在android.app.ContextImpl.openOrCreateDatabase（ContextImpl.java:770） 在android.content.ContextWrapper.openOrCreateDatabase（ContextWrapper.java:221） 在android.database.sqlite.SQLiteOpenHelper.getWritableDatabase（SQLiteOpenHelper.java:157） 在android.database.sqlite.SQLiteOpenHelper.getReadableDatabase（SQLiteOpenHelper.java:231） at com.example.tazeen.classnkk.AllPosts_Page $ MyListAdapter.getView（AllPosts_Page.java:1225） 在android.widget.AbsListView.obtainView（AbsListView.java:2033） 在android.widget.ListView.makeAndAddView（ListView.java:1772） 在android.widget.ListView.fillDown（ListView.java:672） 在android.widget.ListView.fillGap（ListView.java:636） 在android.widget.AbsListView.trackMotionScroll（AbsListView.java:4546） 在android.widget.AbsListView $ FlingRunnable.run（AbsListView.java:3813） 在android.os.Handler.handleCallback（Handler.java:605） 在android.os.Handler.dispatchMessage（Handler.java:92） 在android.os.Looper.loop（Looper.java:137） 在android.app.ActivityThread.main（ActivityThread.java:4340） at java.lang.reflect.Method.invokeNative（Native Method） 在java.lang.reflect.Method.invoke（Method.java:511） 在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:784） 在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:551） at dalvik.system.NativeStart.main（Native Method） 10-17 10：31：47.927 1242-1251 /？ E / System：终结器抛出的未捕获异常 10-17 10：31：47.927 1242-1251 /？ E / System：java.lang.IllegalStateException：没有数据库锁！ 在android.database.sqlite.SQLiteDatabase.verifyLockOwner（SQLiteDatabase.java:2090） 在android.database.sqlite.SQLiteDatabase $ 1.entryRemoved（SQLiteDatabase.java:2182） 在android.database.sqlite.SQLiteDatabase $ 1.entryRemoved（SQLiteDatabase.java:2178） 在android.util.LruCache.trimToSize（LruCache.java:197） 在android.util.LruCache.evictAll（LruCache.java:285） 在android.database.sqlite.SQLiteDatabase.deallocCachedSqlStatements（SQLiteDatabase.java:2143） 在android.database.sqlite.SQLiteDatabase.closeClosable（SQLiteDatabase.java:1126） 在android.database.sqlite.SQLiteDatabase.finalize（SQLiteDatabase.java:1914） 在java.lang.Daemons $ FinalizerDaemon.doFinalize（Daemons.java:182） 在java.lang.Daemons $ FinalizerDaemon.run（Daemons.java:168） 在java.lang.Thread.run（Thread.java:856）
答案 0 :(得分：1)
所以在看到你的代码之后，我将建议一种不同的方法，即我说的第一个方法，你应该在每次通话后close()。
我在您的代码中看到了许多问题，以下是一些建议：
dbhelper = new MyDbHelper(this);？您只应在onCreate SQLiteDatabase db中创建一个成员变量db= dbhelper.getWritableDatabase();并执行onCreate。db.close()方法之外，删除对onDestroy()的所有其他来电。dbhelper.getReadableDatabase();和dbhelper.getWritableDatabase();的所有来电，因为您已经拥有db方法中的实例onCreate，您可以在活动的任何位置使用该实例基本上我想说的是你只需在writable中获取onCreate数据库实例一次，然后在onDestroy中关闭它。
答案 1 :(得分：1)
你的logcat会抛出什么：
android.database.sqlite.DatabaseObjectNotClosedException：应用程序 没有关闭在这里打开的游标或数据库对象 android.database.sqlite.SQLiteDatabase。
无需评论db.close()。启用此功能：
Android error - close() was never explicitly called on database
https://developer.android.com/reference/android/database/sqlite/SQLiteOpenHelper.html