java.lang.IllegalStateException:getWritableDatabase递归调用 [英] java.lang.IllegalStateException:getWritableDatabase called recursively
问题描述
请帮我rsolve错误:
D / AndroidRuntime(836):关闭VM
W / dalvikvm(836):主题ID = 1:螺纹未捕获的异常退出(组= 0x4001d800)
E / AndroidRuntime(836):致命异常:主要
E / AndroidRuntime(836):了java.lang.RuntimeException:无法启动活动ComponentInfo {com.example.FirstProject / com.example.FirstProject.List}:java.lang.IllegalStateException:getWritableDatabase递归调用
E / AndroidRuntime(836):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
E / AndroidRuntime(836):在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
E / AndroidRuntime(836):在android.app.ActivityThread.access $ 2300(ActivityThread.java:125)
E / AndroidRuntime(836):在android.app.ActivityThread $ H.handleMessage(ActivityThread.java:2033)
E / AndroidRuntime(836):在android.os.Handler.dispatchMessage(Handler.java:99)
E / AndroidRuntime(836):在android.os.Looper.loop(Looper.java:123)
E / AndroidRuntime(836):在android.app.ActivityThread.main(ActivityThread.java:4627)
E / AndroidRuntime(836):在java.lang.reflect.Method.invokeNative(本机方法)
E / AndroidRuntime(836):在java.lang.reflect.Method.invoke(Method.java:521)
E / AndroidRuntime(836):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:868)
E / AndroidRuntime(836):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
E / AndroidRuntime(836):在dalvik.system.NativeStart.main(本机方法)
E / AndroidRuntime(836):java.lang.IllegalStateException:致getWritableDatabase递归调用
E / AndroidRuntime(836):在android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:81)
E / AndroidRuntime(836):在com.example.FirstProject.Database.onCreate(Database.java:36)
E / AndroidRuntime(836):在android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:106)
E / AndroidRuntime(836):在android.database.sqlite.SQLiteOpenHelper.getReadableDatabase(SQLiteOpenHelper.java:158)
E / AndroidRuntime(836):在com.example.FirstProject.List.onCreate(List.java:38)
E / AndroidRuntime(836):在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
E / AndroidRuntime(836):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
E / AndroidRuntime(836):11 ...更多
code:
包com.example.FirstProject;进口android.app.Activity;
进口android.app.ListActivity;
进口android.content.Intent;
进口android.database.Cursor;
进口android.database.sqlite.SQLiteDatabase;
进口android.os.Bundle;
进口android.view.View;
进口android.widget.AdapterView;
进口android.widget.AdapterView.OnItemClickListener;
进口android.widget.ArrayAdapter;
进口android.widget.EditText;
进口android.widget.ListAdapter;
进口android.widget.ListView;
进口android.widget.SimpleCursorAdapter;
进口android.widget.TextView;
进口android.widget.Toast;公共类列表扩展ListActivity {
ListView控件站;
保护INT TN;
保护TextView的来源;
受保护的EditText SEARCHTEXT;
保护ListAdapter适配器;
保护光标指针;
@覆盖
公共无效的onCreate(捆绑savedInstanceState)抛出IllegalStateException异常{
super.onCreate(savedInstanceState); 的setContentView(R.layout.screen2); 。TN = getIntent()getIntExtra(TN,0);
SQLiteDatabase DB =(新的数据库(本))getReadableDatabase()。
// SEARCHTEXT =(EditText上)findViewById(android.R.id.list);
站=(ListView控件)findViewById(android.R.id.list);
光标光标= db.rawQuery(SELECT source._id从TINFO WHERE city._id =孟买,新的String [] {});
startManagingCursor(光标); 适配器=新SimpleCursorAdapter(这一点,R.layout.screen2,光标,新的String [] {},新的INT [] {});
stations.setAdapter(适配器); }}
您可能叫 getWritableDatabase()
(或 getReadableDatabase()$在方法之一C $ C>)
的onCreate()
或 onUpgrade()
SQLiteOpenHelper
。 getWritableDatabase()
通话的onCreate
(或 onUpgrade
),所以如果你有这些,你会遇到麻烦运行方法之一 getWritableDatabase()
电话。
这些方法有一个参数( SQLiteDatabase
)对象,必须使用做你的数据库逻辑(所以你不能调用 getWritableDatabase()
(或 getReadableDatabase()
在那里)。
Please help me to rsolve the error :
D/AndroidRuntime(836): Shutting down VM
W/dalvikvm(836): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
E/AndroidRuntime(836): FATAL EXCEPTION: main
E/AndroidRuntime(836): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.FirstProject/com.example.FirstProject.List}: java.lang.IllegalStateException: getWritableDatabase called recursively
E/AndroidRuntime(836): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
E/AndroidRuntime(836): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
E/AndroidRuntime(836): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
E/AndroidRuntime(836): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
E/AndroidRuntime(836): at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime(836): at android.os.Looper.loop(Looper.java:123)
E/AndroidRuntime(836): at android.app.ActivityThread.main(ActivityThread.java:4627)
E/AndroidRuntime(836): at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime(836): at java.lang.reflect.Method.invoke(Method.java:521)
E/AndroidRuntime(836): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
E/AndroidRuntime(836): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
E/AndroidRuntime(836): at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime(836): Caused by: java.lang.IllegalStateException: getWritableDatabase called recursively
E/AndroidRuntime(836): at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:81)
E/AndroidRuntime(836): at com.example.FirstProject.Database.onCreate(Database.java:36)
E/AndroidRuntime(836): at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:106)
E/AndroidRuntime(836): at android.database.sqlite.SQLiteOpenHelper.getReadableDatabase(SQLiteOpenHelper.java:158)
E/AndroidRuntime(836): at com.example.FirstProject.List.onCreate(List.java:38)
E/AndroidRuntime(836): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
E/AndroidRuntime(836): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
E/AndroidRuntime(836): ... 11 more
code:
package com.example.FirstProject;
import android.app.Activity;
import android.app.ListActivity;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.TextView;
import android.widget.Toast;
public class List extends ListActivity{
ListView stations;
protected int tn;
protected TextView source;
protected EditText searchText;
protected ListAdapter adapter;
protected Cursor cursor;
@Override
public void onCreate(Bundle savedInstanceState)throws IllegalStateException {
super.onCreate(savedInstanceState);
setContentView(R.layout.screen2);
tn = getIntent().getIntExtra("tn", 0);
SQLiteDatabase db = (new Database(this)).getReadableDatabase();
// searchText = (EditText) findViewById (android.R.id.list);
stations = (ListView) findViewById (android.R.id.list);
Cursor cursor = db.rawQuery("SELECT source._id,FROM tinfo WHERE city._id = Mumbai", new String[]{});
startManagingCursor(cursor);
adapter = new SimpleCursorAdapter(this, R.layout.screen2, cursor, new String[] {}, new int[] {});
stations.setAdapter(adapter);
}
}
You probably call getWritableDatabase()
(or getReadableDatabase()
) in one of the methods onCreate()
or onUpgrade()
of your implementation of SQLiteOpenHelper
. getWritableDatabase()
calls onCreate
(or onUpgrade
) so if you have a getWritableDatabase()
call in one of those methods you will run in trouble.
Those methods have a parameter (a SQLiteDatabase
object) that you must use to do your database logic(so you must NOT call getWritableDatabase()
(or getReadableDatabase()
in there).
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