使用 ActionBar 和 AlertDialog 将 SQLite 数据库设置为 TextView答案

【问题标题】：setting SQLite DataBase to TextView With ActionBar and AlertDialog使用 ActionBar 和 AlertDialog 将 SQLite 数据库设置为 TextView
【发布时间】：2016-02-14 16:54:18
【问题描述】：

这里有存储在数据库中的详细信息（名字、姓氏、手机、密码、电子邮件 ID）。

我设置了一个列表，以便它将我的数据库详细信息发送到TextView。我已经完成了DataBase、ActionBar、AlertDialogue。单击ActionBar 时将打开AlertDialog。点击“确定”按钮，详细信息必须安排在TextView。

我的代码如下：

public class DatabaseHelper extends SQLiteOpenHelper {

public static String dataBaseName = "Login.db";

private static final int dataBaseVersion = 1;

private static final String tableName = "Accounts";
private static String Key_Id = "id";
private static String Key_FirstName = "firstname";
private static String Key_LastName = "lastname";
private static String Key_Password = "password";
private static String Key_Mobile = "mobile";
private static String Key_Email = "email";

public static String tag = "tag";

private static final String createTableAccounts = "CREATE TABLE " + tableName + "( " + Key_Id + " INTEGER PRIMARY KEY AUTOINCREMENT, " + Key_FirstName + " TEXT, " + Key_LastName + " TEXT, " + Key_Password + " TEXT, " + Key_Mobile + " TEXT, " + Key_Email + " TEXT );";

public DatabaseHelper(Context context) {
    super(context, dataBaseName, null, dataBaseVersion);
}

@Override
public void onCreate(SQLiteDatabase db) {

    db.execSQL(createTableAccounts);

}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

    db.execSQL("DROP TABLE IF EXISTS" + createTableAccounts);
    onCreate(db);

}

public long addAccountDetials(AccountsModel accounts) {
    SQLiteDatabase db = this.getWritableDatabase();

    ContentValues values = new ContentValues();
    values.put(Key_FirstName, accounts.firstName);
    values.put(Key_LastName, accounts.lastName);
    values.put(Key_Password, accounts.passWord);
    values.put(Key_Mobile, accounts.mobile);
    values.put(Key_Email, accounts.emailId);

    long insert = db.insert(tableName, null, values);
    return insert;
}

public int updateEntry(AccountsModel accounts) {
    SQLiteDatabase db = this.getWritableDatabase();

    ContentValues values = new ContentValues();
    values.put(Key_FirstName, accounts.firstName);
    values.put(Key_LastName, accounts.lastName);
    values.put(Key_Password, accounts.passWord);
    values.put(Key_Mobile, accounts.mobile);
    values.put(Key_Email, accounts.emailId);

    return db.update(tableName, values, Key_Id + "=?", new String[]{String.valueOf(accounts.id)});
}

public void deleteEntry(long id) {
    SQLiteDatabase db = this.getWritableDatabase();
    db.delete(tableName, Key_Id + " = ?", new String[]{String.valueOf(id)});
}

public AccountsModel getAccounts(long id) {
    SQLiteDatabase db = this.getReadableDatabase();

    String selectQuery = "SELECT  * FROM " + tableName + " WHERE "
            + Key_Id + " = " + id;
    Log.d(tag, selectQuery);

    Cursor c = db.rawQuery(selectQuery, null);

    if (c != null)
        c.moveToFirst();

    AccountsModel accountsModel = new AccountsModel();
    accountsModel.id = c.getString(c.getColumnIndex(Key_Id));
    accountsModel.firstName = c.getString(c.getColumnIndex(Key_FirstName));
    accountsModel.lastName = c.getString(c.getColumnIndex(Key_LastName));
    accountsModel.mobile = c.getString(c.getColumnIndex(Key_Mobile));
    accountsModel.passWord = c.getString(c.getColumnIndex(Key_Password));
    accountsModel.emailId = c.getString(c.getColumnIndex(Key_Email));

    return accountsModel;
}
public List<AccountsModel> getAllAccountList() {
    List<AccountsModel> accountsModelArrayList = new ArrayList<AccountsModel>();

    String selectQuery = "SELECT  * FROM " + tableName;
    Log.d(tag, selectQuery);

    SQLiteDatabase db = this.getReadableDatabase();
    Cursor c = db.rawQuery(selectQuery, null);

    if (c.moveToFirst()) {
        do {

            AccountsModel accountsModel = new AccountsModel();
            accountsModel.id = c.getString(c.getColumnIndex(Key_Id));
            accountsModel.firstName = c.getString(c.getColumnIndex(Key_FirstName));
            accountsModel.lastName = c.getString(c.getColumnIndex(Key_LastName));
            accountsModel.mobile = c.getString(c.getColumnIndex(Key_Mobile));
            accountsModel.passWord = c.getString(c.getColumnIndex(Key_Password));
            accountsModel.emailId = c.getString(c.getColumnIndex(Key_Email));

            accountsModelArrayList.add(accountsModel);
        } while (c.moveToNext());
    }

    return accountsModelArrayList;
}}

主活动

public class MainActivity extends AppCompatActivity {

EditText firstName;
EditText lastName;
EditText mobile;
EditText password;
EditText email;

ListView listView;

List<AccountsModel>list=new ArrayList<AccountsModel>();

DatabaseHelper databaseHelper;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    databaseHelper =new DatabaseHelper(getApplicationContext());
    firstName=(EditText)findViewById(R.id.edt_firstname);
    lastName=(EditText)findViewById(R.id.edt_lastname);
    mobile=(EditText)findViewById(R.id.edt_mobile);
    password=(EditText)findViewById(R.id.edt_password);
    email=(EditText)findViewById(R.id.edt_email);

    listView=(ListView)findViewById(R.id.lst_view);
}

@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;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_add) {
        AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
        builder.setTitle("ADD DATA TO LIST");
        builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which,View v) {

                if(v == findViewById(R.id.action_add)){
                    listView.setAdapter(" ");
                    AccountsModel accountsModel = new AccountsModel();
                    accountsModel.firstName = firstName.getText().toString();
                    accountsModel.lastName = lastName.getText().toString();
                    accountsModel.mobile = mobile.getText().toString();
                    accountsModel.passWord = password.getText().toString();
                    accountsModel.emailId = email.getText().toString();

                    databaseHelper.addAccountDetials(accountsModel);
                    list = accountsModel.getAllAccountList();
                }
                ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_list_item_1, value);

                String value = "";
                for (AccountsModel accountsModel : list) {
                    value = value + "id: " + accountsModel.id + ", firstName : " + accountsModel.firstName + " lastName : " + accountsModel.lastName + "mobile : " + accountsModel.mobile + " passWord : " + accountsModel.passWord + " email : " + accountsModel.emailId + "\n";
                }
                listView.setAdapter(value);
            }

        });
        builder.setNeutralButton("CANCEL", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {

            }
        });
        AlertDialog alertDialog = builder.create();
        alertDialog.show();
        return true;
    }

    return super.onOptionsItemSelected(item);
}}

帐户模型

public class AccountsModel {

public int id;
public String firstname;
public String lastname;
public String password;
public String mobile;
public String email;

public AccountsModel(int id,String firstname,String lastname,String password,String mobile,String email)
{
    this.id=id;
    this.firstname=firstname;
    this.lastname=lastname;
    this.password=password;
    this.mobile=mobile;
    this.email=email;
}
public  AccountsModel()
{

}}

由于我是android新手，请根据我的应用修改代码以便我理解。

我面临的错误

错误:(75, 45) 错误: 找不到符号方法 getAllAccountList() 错误：任务“：app：compileDebugJavaWithJavac”执行失败。编译失败；有关详细信息，请参阅编译器错误输出。

【问题讨论】：

这里有什么问题？
想将我的数据库详细信息设置为我的 listView 适配器，以便可以在 ListView 中查看我的详细信息
你遇到了什么问题。
不知道如何将我的详细信息设置为 ListView
我在代码上面列出了我的错误，它们是我面临的错误

标签： android sqlite listview android-listview android-menu

【解决方案1】：

尝试通过“onClick”方法删除@Override。

builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
   public void onClick(DialogInterface dialog, int which) {
          ...
   }
});

【讨论】：

@override 已删除；那么？
Deleting @override ;显示错误 "Error:(64, 83) 错误：不是抽象的，不会覆盖抽象方法 onClick(DialogInterface, int) 在 OnClickListener"
你都删除了吗？

【解决方案2】：

accountsModel 是 AccountsModel 类的对象。 AccountsModel 类没有名为 getAllAccountList() 的方法。这是给定错误的原因。 getAllAccountList() 方法出现在 DatabaseHelper 类中。所以它应该被称为databaseHelper.getAllAccountList() 而不是accountsModel.getAllAccountList()。这是一个非常基本的错误，我想您应该尝试查看 AndroidStudio 提到的那一行以更好地理解该错误。

【讨论】：