Question

这是我第一次开发android，也是SQLite。我跟随一些从SQLite获取值的教程。这是我的代码：

修改

 public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        myManager = (LocationManager) getSystemService(LOCATION_SERVICE);
        tv = (TextView) findViewById(R.id.test);

    }
public void onLocationChanged(Location location) {
        // TODO Auto-generated method stub

        latitude = ((Double) location.getLatitude()).toString();
        longitude = ((Double) location.getLongitude()).toString();
        date = getDate();
        time = getCurrentTime();

        if (location != null) {
            if (checkInternet()) {

                String s = "";
                s += "\tLatitude:  " + latitude + "\n";
                s += "\tLongitude: " + longitude + "\n";
                s += "\tDate: " + date + "\n";
                s += "\tTime: " + time + "\n";

                tv.setText(s);
                //lookupData();

                }

            } else {
                Toast.makeText(this, "network connection is not available",
                        Toast.LENGTH_SHORT).show();
                keepSQLite();

            }
        }
    }

    public void keepSQLite() {
        try {
            locationDB = openOrCreateDatabase("locationDB", MODE_PRIVATE, null);
            createTable();
            insertTable();
        } catch (SQLiteException se) {
            Log.e(getClass().getSimpleName(),
                    "Could not create or Open the database");
        } finally {
            locationDB.close();
        }

    }

    private void createTable() {

        locationDB.execSQL("CREATE TABLE IF NOT EXISTS " + "ben_logs_boss"
                + " (username VARCHAR, " + " date VARCHAR, " + "time VARCHAR, "
                + " lat VARCHAR, " + " lng VARCHAR);");
    }

    private void insertTable() {
        locationDB.execSQL("INSERT INTO " + "ben_logs_boss" + " Values ("
                + "ben" + "," + getDate() + "," + getDate() + ","
                + getCurrentTime() + "," + latitude + "," + longitude + ");");
        Toast.makeText(this, "insert", Toast.LENGTH_SHORT).show();
    }


    private void lookupData() {
            **String DB_PATH = "/data/data/test.test.test/databases/";
        String DB_NAME = "ben_logs_boss";
        String myPath = DB_PATH + DB_NAME;
        locationDB = SQLiteDatabase.openDatabase(myPath, null,
                SQLiteDatabase.OPEN_READONLY);**
            cursor = locationDB.rawQuery("SELECT lat,lng FROM " + "ben_logs_boss",
                    null);

            if (cursor != null) {
                if (cursor.moveToFirst()) {
                    do {
                        cursor.getString(cursor.getColumnIndex("lat"));
                        cursor.getString(cursor.getColumnIndex("lng"));

                    } while (cursor.moveToNext());
                }
                cursor.close();
                }
                locationDB.close();
            }

当应用程序运行到调用此方法的步骤时，强制关闭发生。我不知道为什么。谁能告诉我错误？谢谢。

更新Logcat：

调用lookupData（）时：

08-10 14:48:12.289 I/ActivityManager(  129): Displayed test.test.test/.TestActivity: +454ms
08-10 14:48:42.843 E/Database(22387): sqlite3_open_v2("/data/data/test.test.test/database/ben_logs_boss.sqlite", &handle, 1, NULL) failed
08-10 14:48:51.425 E/InputDispatcher(  129): channel '40855ac0 test.test.test/test.test.test.TestActivity (server)' ~ Consumer closed input channel or an error occurred.  events=0x8
08-10 14:48:51.425 E/InputDispatcher(  129): channel '40855ac0 test.test.test/test.test.test.TestActivity (server)' ~ Channel is unrecoverably broken and will be disposed!

调用keepSQLite（）：

08-10 14:50:29.605 E/TestActivity(22497): Could not create or Open the database
08-10 14:50:31.753 V/WindowManager(  129): isSystemKeyEventRequested() is called keyCode = 3 componentName = ComponentInfo{test.test.test/test.test.test.TestActivity}
08-10 14:50:32.253 E/Database(22610):   at android.database.sqlite.SQLiteStatement.native_execute(Native Method)
08-10 14:50:32.253 E/Database(22610):   at android.database.sqlite.SQLiteStatement.execute(SQLiteStatement.java:61)

Answer 1

我认为您缺少数据库扩展名，即（.sqlite）

String DB_NAME = "ben_logs_boss.sqlite";

从sqlite获取值时强制关闭

1 个答案: