我没有编译时错误但是当我执行我的应用程序时它崩溃了。有代码和logcat
public class MainActivity extends AppCompatActivity {
EditText nbBeer;
EditText nbWhisky;
EditText nbWine;
EditText nbVodka;
DatePicker myDatePicker;
private Calendar calendar;
private int year, month, day;
TextView dateView;
MyDBHandler dbHandler;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
nbBeer = (EditText) findViewById(R.id.nbBeer);
nbWhisky = (EditText) findViewById(R.id.nbWhisky);
nbWine = (EditText) findViewById(R.id.nbWine);
nbVodka = (EditText) findViewById(R.id.nbVodka);
dateView = (TextView) findViewById(R.id.dateView);
calendar = Calendar.getInstance();
year = calendar.get(Calendar.YEAR);
month = calendar.get(Calendar.MONTH);
day = calendar.get(Calendar.DAY_OF_MONTH);
showDate(year, month+1, day);
dbHandler = new MyDBHandler(this, null, null, 1);
}
@SuppressWarnings("deprecation")
public void setDate(View view) {
showDialog(999);
Toast.makeText(getApplicationContext(), "ca", Toast.LENGTH_SHORT)
.show();
}
@Override
protected Dialog onCreateDialog(int id) {
// TODO Auto-generated method stub
if (id == 999) {
return new DatePickerDialog(this, myDateListener, year, month, day);
}
return null;
}
private DatePickerDialog.OnDateSetListener myDateListener = new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker arg0, int arg1, int arg2, int arg3) {
// TODO Auto-generated method stub
// arg1 = year
// arg2 = month
// arg3 = day
showDate(arg1, arg2+1, arg3);
}
};
private void showDate(int year, int month, int day) {
dateView.setText(new StringBuilder().append(day).append("/")
.append(month).append("/").append(year));
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
// add a product to the database
public void saveButtonClicked(View view){
Products product = new Products(nbBeer.getInputType(), dateView.getText().toString(), nbWhisky.getInputType(),nbWine.getInputType(), nbVodka.getInputType());
dbHandler.addProduct(product);
}
}
Products class
public class Products {
private int _id ;
private String _date;
private int _beers;
private int _whisky;
private int _wine;
private int _vodka;
public Products(){}
public Products(int beers, String date, int whisky, int wine, int vodka) {
this._beers = beers;
this._date = date;
this._whisky = whisky;
this._wine = wine;
this._vodka = vodka;
}
public String get_date() {
return _date;
}
public int get_beers() {
return _beers;
}
public int get_whisky() {
return _whisky;
}
public int get_wine() {
return _wine;
}
public int get_vodka() {
return _vodka;
}
}
MyDBHlander class
public class MyDBHandler extends SQLiteOpenHelper {
private static final int DATABASE_VERSION = 1;
private static final String DATABASE_NAME = "products.db";
private static final String TABLE_PRODUCTS = "products";
private static final String COLUMN_ID = "id";
private static final String COLUMN_DATE = "date";
private static final String COLUMN_BEERS = "beers";
private static final String COLUMN_WHISKY = "whisky";
private static final String COLUMN_WINE = "wine";
private static final String COLUMN_vodka = "vodka";
public MyDBHandler(Context context, String name, SQLiteDatabase.CursorFactory factory, int version) {
super(context, DATABASE_NAME, factory, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
String query = " CREATE TABLE" + TABLE_PRODUCTS + "(" +
COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT" +
COLUMN_DATE + " TEXT" +
COLUMN_BEERS + "INTEGER" +
COLUMN_WHISKY + "INTEGER" +
COLUMN_WINE + "INTEGER" +
COLUMN_vodka + "INTEGER" +
")";
db.execSQL(query);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS" + TABLE_PRODUCTS);
onCreate(db);
}
// add a new row the database
public void addProduct(Products product){
ContentValues values = new ContentValues();
values.put(COLUMN_DATE, product.get_date());
values.put(COLUMN_BEERS, product.get_beers());
values.put(COLUMN_WHISKY, product.get_whisky());
values.put(COLUMN_WINE, product.get_wine());
values.put(COLUMN_vodka, product.get_vodka());
SQLiteDatabase db = getWritableDatabase();
db.insert(TABLE_PRODUCTS, null, values);
db.close();
}
// print out the database as a string
public String databaseToString () {
String dbString = "";
SQLiteDatabase db = getWritableDatabase();
String query = " SELECT * FROM " + TABLE_PRODUCTS + " WHERE 1";
// cursor points to a location in your results
Cursor c = db.rawQuery(query, null);
// move to the first row in the results
c.moveToFirst();
while (!c.isAfterLast()) {
if (c.getString(c.getColumnIndex("date")) != null) {
dbString += c.getString(c.getColumnIndex("date"));
dbString += "\n";
}
}
db.close();
return dbString;
}
}
Logcat
01-03 18:38:55.397 7241-7241/com.example.sony.myapp E/SQLiteLog: (1) near "TABLEproducts": syntax error
01-03 18:38:55.399 7241-7241/com.example.sony.myapp D/AndroidRuntime: Shutting down VM
01-03 18:38:55.399 7241-7241/com.example.sony.myapp E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.sony.myapp, PID: 7241
java.lang.IllegalStateException: Could not execute method for android:onClick
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:275)
at android.view.View.performClick(View.java:5198)
at android.view.View$PerformClick.run(View.java:21147)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:270)
at android.view.View.performClick(View.java:5198)
at android.view.View$PerformClick.run(View.java:21147)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: android.database.sqlite.SQLiteException: near "TABLEproducts": syntax error (code 1): , while compiling: CREATE TABLEproducts(id INTEGER PRIMARY KEY AUTOINCREMENTdate TEXTbeersINTEGERwhiskyINTEGERwineINTEGERvodkaINTEGER)
at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:887)
at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:498)
at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1674)
at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1605)
at com.example.sony.myapp.MyDBHandler.onCreate(MyDBHandler.java:34)
at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:251)
at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:163)
at com.example.sony.myapp.MyDBHandler.addProduct(MyDBHandler.java:52)
at com.example.sony.myapp.MainActivity.saveButtonClicked(MainActivity.java:104)
at java.lang.reflect.Method.invoke(Native Method)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:270)
at android.view.View.performClick(View.java:5198)
at android.view.View$PerformClick.run(View.java:21147)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
01-03 18:38:59.678 7241-7241 / com.example.sony.myapp I / Process：发送信号。 PID：7241 SIG：9
答案 0 :(得分：0)
从您提供的日志中我认为您的查询中存在问题。使用查询，例如select * from tablename，其中id = 1或类似的东西。希望它有所帮助！
答案 1 :(得分：0)
阅读错误消息：
near "TABLEproducts": syntax error (code 1): , while compiling: CREATE TABLEproducts(id INTEGER PRIMARY KEY AUTOINCREMENTdate TEXTbeersINTEGERwhiskyINTEGERwineINTEGERvodkaINTEGER)
你缺少很多空格和逗号。