我在关注thenewboston Android tut的
时遇到了问题所以第一个问题是我确信我已经完全遵循了他所做的事情，但这次我的应用程序无效。
很抱歉，如果我的帖子太长，如果你能让我的问题清楚，你可以编辑它
所以这是我扩展了Activity的SQLiteExample类：
public class SQLiteExample extends Activity implements OnClickListener{
Button sqlUpdate, sqlView;
EditText sqlName, sqlHotness;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.sqlliteexample);
sqlUpdate = (Button) findViewById(R.id.bSqlUpdate);
sqlView = (Button) findViewById(R.id.bSqlopenView);
sqlName = (EditText) findViewById(R.id.etSqlName);
sqlHotness = (EditText) findViewById(R.id.etSqlHot);
sqlUpdate.setOnClickListener(this);
sqlView.setOnClickListener(this);
}
public void onClick(View arg0) {
// TODO Auto-generated method stub
switch(arg0.getId()){
case R.id.bSqlUpdate :
boolean didItWork = true;
try {
String name = sqlName.getText().toString();
String hotness = sqlHotness.getText().toString();
HotOrNot entry = new HotOrNot(SQLiteExample.this);
entry.open();
entry.createEntry(name, hotness);
entry.close();
} catch (Exception e) {
// TODO Auto-generated catch block
didItWork = false;
String error = e.toString();
Dialog d = new Dialog(this);
d.setTitle("Dang It!");
TextView tv = new TextView(this);
tv.setText(error);
d.setContentView(tv);
d.show();
}finally{
if(didItWork){
Dialog d = new Dialog(this);
d.setTitle("Heck Yea!");
TextView tv = new TextView(this);
tv.setText("Success");
d.setContentView(tv);
d.show();
}
}
break;
case R.id.bSqlopenView :
Intent i = new Intent("com.thenewboston.tama.SQLView");
startActivity(i);
break;
}
}
我将setOnClickListener（）设置为这里的2个按钮。
这是我的HotOrNot类，它包含了SQLite的东西：
public class HotOrNot {
public static final String KEY_ROWID = "_id";
public static final String KEY_NAME = "persons_name";
public static final String KEY_HOTNESS = "persons_hotness";
private static final String DATABASE_NAME = "HotOrNotdb";
private static final String DATABASE_TABLE = "peopleTable";
private static final int DATABASE_VERSION = 1;
private DbHelper ourHelper;
private final Context ourContext;
private SQLiteDatabase ourDatabase;
private static class DbHelper extends SQLiteOpenHelper {
public DbHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
// TODO Auto-generated constructor stub
}
@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
db.execSQL("CREATE TABLE " + DATABASE_TABLE + " (" +
KEY_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
KEY_NAME + " TEXT NOT NULL, " +
KEY_HOTNESS + "TEXT NOT NULL); "
);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE);
onCreate(db);
}
}
public HotOrNot(Context c){
ourContext = c;
}
//?????????????????????
public HotOrNot open() throws SQLException{
ourHelper = new DbHelper(ourContext);
ourDatabase = ourHelper.getWritableDatabase();
return this;
}
public void close(){
ourHelper.close();
}
public long createEntry(String name, String hotness) {
// TODO Auto-generated method stub
ContentValues cv = new ContentValues();
cv.put(KEY_NAME, name);
cv.put(KEY_HOTNESS, hotness);
return ourDatabase.insert(DATABASE_TABLE, null, cv);
}
public String getData() {
// TODO Auto-generated method stub
String[] columns = new String[]{KEY_ROWID, KEY_NAME, KEY_HOTNESS};
Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null, null, null);
String result = "";
int iRow = c.getColumnIndex(KEY_ROWID);
int iName = c.getColumnIndex(KEY_NAME);
int iHotness = c.getColumnIndex(KEY_HOTNESS);
for(c.moveToFirst(); !c.isAfterLast(); c.moveToNext()){
result += c.getString(iRow) + " " + c.getString(iName) + " " +c.getString(iHotness) + "\n";
}
return result;
}
这是我的SQLView扩展活动（对于第二个按钮）：
public class SQLView extends Activity{
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.sqlview);
TextView tv = (TextView) findViewById(R.id.tvSQLinfo);
HotOrNot info = new HotOrNot(this);
info.open();
String data = info.getData();
info.close();
tv.setText(data);
}
这是我点击SQLiteExample类中的R.id.bSqlopenView按钮时出现的错误：
03-19 14:47:54.504: I/Database(335): sqlite returned: error code = 1, msg = table peopleTable has no column named persons_hotness
在第一次
之后又出现了很多错误已编辑：这是我的完整版本错误列表：D
03-19 14:47:28.194: D/dalvikvm(335): GC_EXTERNAL_ALLOC freed 50K, 53% free 2554K/5379K, external 1625K/2137K, paused 107ms
03-19 14:47:49.634: W/KeyCharacterMap(335): No keyboard for id 0
03-19 14:47:49.634: W/KeyCharacterMap(335): Using default keymap: /system/usr/keychars/qwerty.kcm.bin
03-19 14:47:54.504: I/Database(335): sqlite returned: error code = 1, msg = table peopleTable has no column named persons_hotness
03-19 14:47:54.515: E/Database(335): Error inserting persons_hotness= persons_name=
03-19 14:47:54.515: E/Database(335): android.database.sqlite.SQLiteException: table peopleTable has no column named persons_hotness: , while compiling: INSERT INTO peopleTable(persons_hotness, persons_name) VALUES(?, ?);
03-19 14:47:54.515: E/Database(335): at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method)
03-19 14:47:54.515: E/Database(335): at android.database.sqlite.SQLiteCompiledSql.compile(SQLiteCompiledSql.java:92)
03-19 14:47:54.515: E/Database(335): at android.database.sqlite.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:65)
03-19 14:47:54.515: E/Database(335): at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:83)
03-19 14:47:54.515: E/Database(335): at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:41)
03-19 14:47:54.515: E/Database(335): at android.database.sqlite.SQLiteDatabase.compileStatement(SQLiteDatabase.java:1149)
03-19 14:47:54.515: E/Database(335): at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1569)
03-19 14:47:54.515: E/Database(335): at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1426)
03-19 14:47:54.515: E/Database(335): at com.thenewboston.tama.HotOrNot.createEntry(HotOrNot.java:70)
03-19 14:47:54.515: E/Database(335): at com.thenewboston.tama.SQLiteExample.onClick(SQLiteExample.java:46)
03-19 14:47:54.515: E/Database(335): at android.view.View.performClick(View.java:2485)
03-19 14:47:54.515: E/Database(335): at android.view.View$PerformClick.run(View.java:9080)
03-19 14:47:54.515: E/Database(335): at android.os.Handler.handleCallback(Handler.java:587)
03-19 14:47:54.515: E/Database(335): at android.os.Handler.dispatchMessage(Handler.java:92)
03-19 14:47:54.515: E/Database(335): at android.os.Looper.loop(Looper.java:123)
03-19 14:47:54.515: E/Database(335): at android.app.ActivityThread.main(ActivityThread.java:3683)
03-19 14:47:54.515: E/Database(335): at java.lang.reflect.Method.invokeNative(Native Method)
03-19 14:47:54.515: E/Database(335): at java.lang.reflect.Method.invoke(Method.java:507)
03-19 14:47:54.515: E/Database(335): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
03-19 14:47:54.515: E/Database(335): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
03-19 14:47:54.515: E/Database(335): at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分：1)
更新您的数据库版本号，它应该删除并重新创建您的数据库以修复任何缺少的列：
private static final int DATABASE_VERSION = 2; // previously 1
答案 1 :(得分：1)
在KEY_HOTNESS之后的空格中放置您创建数据库的String，而不是：
//...
KEY_HOTNESS + "TEXT NOT NULL); "
写：
//...
KEY_HOTNESS + " TEXT NOT NULL); "