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下面我发布logcat详细信息。请告诉我如何解决这个问题。IllegalStateException：SQLite光标已关闭
11-21 14:49:33.604: E/AndroidRuntime(1721): FATAL EXCEPTION: main
11-21 14:49:33.604: E/AndroidRuntime(1721): java.lang.RuntimeException: Unable to resume activity {com.example.shaktitool/com.example.shaktitool.Product}: java.lang.IllegalStateException: trying to requery an already closed cursor [email protected]
11-21 14:49:33.604: E/AndroidRuntime(1721): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2575)
11-21 14:49:33.604: E/AndroidRuntime(1721): at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2603)
11-21 14:49:33.604: E/AndroidRuntime(1721): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1237)
11-21 14:49:33.604: E/AndroidRuntime(1721): at android.os.Handler.dispatchMessage(Handler.java:99)
11-21 14:49:33.604: E/AndroidRuntime(1721): at android.os.Looper.loop(Looper.java:137)
11-21 14:49:33.604: E/AndroidRuntime(1721): at android.app.ActivityThread.main(ActivityThread.java:4745)
11-21 14:49:33.604: E/AndroidRuntime(1721): at java.lang.reflect.Method.invokeNative(Native Method)
11-21 14:49:33.604: E/AndroidRuntime(1721): at java.lang.reflect.Method.invoke(Method.java:511)
11-21 14:49:33.604: E/AndroidRuntime(1721): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
11-21 14:49:33.604: E/AndroidRuntime(1721): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
11-21 14:49:33.604: E/AndroidRuntime(1721): at dalvik.system.NativeStart.main(Native Method)
11-21 14:49:33.604: E/AndroidRuntime(1721): Caused by: java.lang.IllegalStateException: trying to requery an already closed cursor [email protected]
11-21 14:49:33.604: E/AndroidRuntime(1721): at android.app.Activity.performRestart(Activity.java:5051)
11-21 14:49:33.604: E/AndroidRuntime(1721): at android.app.Activity.performResume(Activity.java:5074)
11-21 14:49:33.604: E/AndroidRuntime(1721): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2565)
11-21 14:49:33.604: E/AndroidRuntime(1721): ... 10 more
我的Java代码：
package com.example.shaktitool;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
public class Product extends Activity {
protected static final String PRODUCT_REQUEST = null;
private SQLiteAdapterPro mySQLiteAdapter;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.product);
Intent intent = getIntent();
ListView list = (ListView)findViewById(R.id.content_list);
/*
* Create/Open a SQLite database
* and fill with dummy content
* and close it
*/
mySQLiteAdapter = new SQLiteAdapterPro(this);
mySQLiteAdapter.openToWrite();
mySQLiteAdapter.deleteAll();
mySQLiteAdapter.insert("ELECTRONICS-COMPUTERS");
mySQLiteAdapter.insert("DESKTOPS");
mySQLiteAdapter.insert("NOTEBOOKS");
mySQLiteAdapter.close();
/*
* Open the same SQLite database
* and read all it's content.
*/
mySQLiteAdapter = new SQLiteAdapterPro(this);
mySQLiteAdapter.openToRead();
Cursor cursor = mySQLiteAdapter.queueAll();
startManagingCursor(cursor);
String[] from = new String[]{SQLiteAdapter.KEY_CONTENT};
int[] to = new int[]{R.id.text};
SimpleCursorAdapter cursorAdapter =
new SimpleCursorAdapter(this, R.layout.row, cursor, from, to);
list.setAdapter(cursorAdapter);
list.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> arg0, View arg1,
int position, long arg3) {
switch(position){
case 1 : Intent intent = new Intent(Product.this, Desktop.class);
startActivity(intent);
break;
case 2 : Intent intent1 = new Intent(Product.this, Notebook.class);
startActivity(intent1);
break;
}
}
});
mySQLiteAdapter.close();
}
}
请显示您的java代码 –
问题是，当我按Back按钮应用程序关闭。当我按下“后退”按钮时，我应该怎么做，我必须进行上一个活动。 – Abhay
你有没有相同的解决方案？ –