java - 我的 Android 应用程序一直给我一个 Leak Found 错误

Question

我正在开发一个 Android 应用程序，但我不断收到“发现泄漏”错误。这是调用堆栈:

11-01 11:26:47.087: ERROR/Database(7317): Leak found
11-01 11:26:47.087: ERROR/Database(7317): java.lang.IllegalStateException: /data/data/com.noshufou.android.su/databases/permissions.sqlite SQLiteDatabase created and never closed
11-01 11:26:47.087: ERROR/Database(7317):     at android.database.sqlite.SQLiteDatabase.<init>(SQLiteDatabase.java:1792)
11-01 11:26:47.087: ERROR/Database(7317):     at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:798)
11-01 11:26:47.087: ERROR/Database(7317):     at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:857)
11-01 11:26:47.087: ERROR/Database(7317):     at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:850)
11-01 11:26:47.087: ERROR/Database(7317):     at android.app.ApplicationContext.openOrCreateDatabase(ApplicationContext.java:535)
11-01 11:26:47.087: ERROR/Database(7317):     at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:193)
11-01 11:26:47.087: ERROR/Database(7317):     at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:193)
11-01 11:26:47.087: ERROR/Database(7317):     at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:98)
11-01 11:26:47.087: ERROR/Database(7317):     at com.noshufou.android.su.DBHelper.<init>(DBHelper.java:28)
11-01 11:26:47.087: ERROR/Database(7317):     at com.noshufou.android.su.UninstallReceiver.onReceive(UninstallReceiver.java:10)
11-01 11:26:47.087: ERROR/Database(7317):     at android.app.ActivityThread.handleReceiver(ActivityThread.java:2637)
11-01 11:26:47.087: ERROR/Database(7317):     at android.app.ActivityThread.access$3100(ActivityThread.java:119)
11-01 11:26:47.087: ERROR/Database(7317):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1913)
11-01 11:26:47.087: ERROR/Database(7317):     at android.os.Handler.dispatchMessage(Handler.java:99)
11-01 11:26:47.087: ERROR/Database(7317):     at android.os.Looper.loop(Looper.java:123)
11-01 11:26:47.087: ERROR/Database(7317):     at android.app.ActivityThread.main(ActivityThread.java:4363)
11-01 11:26:47.087: ERROR/Database(7317):     at java.lang.reflect.Method.invokeNative(Native Method)
11-01 11:26:47.087: ERROR/Database(7317):     at java.lang.reflect.Method.invoke(Method.java:521)
11-01 11:26:47.087: ERROR/Database(7317):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:862)
11-01 11:26:47.087: ERROR/Database(7317):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620)
11-01 11:26:47.087: ERROR/Database(7317):     at dalvik.system.NativeStart.main(Native Method)

问题是我没有在我的代码中的任何地方使用数据库。

编辑:

这是整个程序的代码 fragment 。此外，我有时只会收到此错误，有时却不会，这是另一件奇怪的事情。

这是主要的 Activity :

public class SetAlarmUI extends Activity {
TextView mTimeDisplay;
Button setAlarmButton;

private Calendar time;
private int alarmHour;
private int alarmMin;

static final int TIME_DIALOG_ID = 0;
Toast toast;

@Override
/** Called when the activity is first created. */
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.setalarm);

    // Holder for the Time, user will set this value later
    time = Calendar.getInstance();
    // Show the selected time
    mTimeDisplay = (TextView) findViewById( R.id.timeText );        
    // Allow user to select the time for alarm and set it
    setAlarmButton = (Button) findViewById( R.id.pickTime );

    /***************** LISTENERS ******************/

    // add a click listener to the Set Time button
    OnClickListener setTimeListener = new OnClickListener() {
        // Do this when the Set-Time button is clicked;             
        public void onClick(View v) {
            // Display the Time Selector Dialog box so DEVELOPER can set the alarm
            /** This will later be changed so that time is retrieved from a server */
            showDialog( TIME_DIALOG_ID );  // TIME_DIALOG_ID = a unique ID for the Time Picker Dialog
        }
    };
    Log.e( "OUT", "Line 59: Continuing..." );

    //--------- Assign The Listeners ----------//
    setAlarmButton.setOnClickListener( setTimeListener );

    /**********************************************/

    // get the current time
    time.setTimeInMillis( System.currentTimeMillis() );
    alarmHour = time.get( Calendar.HOUR_OF_DAY);
    alarmMin = time.get( Calendar.MINUTE );

    // Update the current display
    updateDisplay();             
}


// updates the time we display in the TextView
private void updateDisplay() {
    mTimeDisplay.setText(
        new StringBuilder()
                .append(pad(alarmHour)).append(":")
                .append(pad(alarmMin)));
}
// Fix up the string representation of the time
private static String pad(int c) {
    if (c >= 10)
        return String.valueOf(c);
    else
        return "0" + String.valueOf(c);
}

// the callback received when the user "sets" the time in the dialog
private TimePickerDialog.OnTimeSetListener mTimeSetListener =
    new TimePickerDialog.OnTimeSetListener() {
        public void onTimeSet(TimePicker view, int hourOfDay, int minute) {

            time.set( Calendar.HOUR_OF_DAY, hourOfDay );
            time.set( Calendar.MINUTE, minute );

            // Tell user alarm was set
            String timeSetTo = "Alarm Set: " + time.get( Calendar.HOUR_OF_DAY ) + ":" + time.get( Calendar.MINUTE ) + " " + time.get( Calendar.AM_PM );
            if( toast != null ) 
                toast.cancel();

            toast = Toast.makeText( SetAlarmUI.this, "L" + timeSetTo, Toast.LENGTH_LONG );
            toast.show();               

            // When the alarms goes off we want to send an Intent to our Broadcast Receiver (AlarmAction), 
            // so set an Intent between the AlarmUI and the AlarmAction
            Intent intent = new Intent( SetAlarmUI.this, CallAlarm.class );

            // Create an IntentSender to have the intent executed as a broadcast later when alarm goes off.
            PendingIntent sender = PendingIntent.getBroadcast( SetAlarmUI.this, 0, intent, 0 );

            /** Schedule the alarm */
            // To get any service we use getSystemService( Service Name )
            AlarmManager alarmManager = ( AlarmManager ) getSystemService( ALARM_SERVICE );
            /* Finally, we set the alarm to the desired time! WOOHOO! */
            alarmManager.set( AlarmManager.RTC_WAKEUP, time.getTimeInMillis(), sender );
        }
    };

@Override
protected Dialog onCreateDialog(int id) {
    switch (id) {
        case TIME_DIALOG_ID:
            return new TimePickerDialog(this,
                    mTimeSetListener, alarmHour, alarmMin, false);
    }
    return null;
}
}

这是我的广播接收器:

public class CallAlarm extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent callDismiss)
{
    Toast.makeText( context, R.string.debug, Toast.LENGTH_LONG ).show();
    Log.e( "AlarmAction", context.getResources().getStringArray( R.array.ahadith )[0] );

    callDismiss = new Intent( context, DismissUI.class );
    context.startActivity( callDismiss );
}
}

最后这是我的第二个 Activity，它在警报响起时被广播接收器调用:

public class DismissUI extends Activity {

@Override
/** Called when the activity is first created. */
public void onCreate( Bundle savedInstanceState ) {
    // Display the Hadith
    //super.onCreate( savedInstanceState );
    setContentView( R.layout.dismiss );

    Log.e( "DismissUI", "MADE IT TO THE DISMISS!" );    /* DEBUG */

    // Get the Activity's Layout
    LinearLayout mLayout = ( LinearLayout ) findViewById( R.layout.dismiss );
    // Get a hadith from the String xml file and display it
    TextView textView = new TextView( this );
    textView.setText( getResources().getTextArray( R.array.ahadith )[0] );
    // Set the layout for the Text (hadith)
    LayoutParams p = new LayoutParams( LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT );    
    textView.setLayoutParams(p);
    // Add the hadith text to the layout at the beginning hence the ZERO
    mLayout.addView( textView, 0 );
    // Get the Text box for user input
    EditText textBox = ( EditText ) findViewById( R.id.userInput );
    // Get the Snooze and Dismiss buttons

    // Set listener for Snooze button
    // Set listener for Dismiss Button

}
}

Answer 1

让我猜猜 - 您使用的是带有自定义 ROM 的 root 手机。最有可能是 CyanogenMod？您可能使用的是有问题的版本。在此处查看此问题:http://code.google.com/p/cyanogenmod/issues/detail?id=1512

它基本上来自管理 super 用户状态并允许应用成为 super 用户的应用。它似乎没有正确维护其数据库。