更改 Spinner 项目基于一个 textview 更改（数据库）

Question

我想根据 textview 更改更改我的微调器值。 Spinner 值应针对 textview 更改从数据库中获取数据。目前，如果我选择 textview，则没有任何变化。

如果 textview 发生变化，则基于以下代码微调器不会发生变化。谷歌搜索但不成功的结果。你能帮忙吗。

MainActivity.java

package com.bar.example.myapplication;


public class MainActivity extends AppCompatActivity {
  public static final String BARCODE_KEY = "BARCODE";

  EditText date;
  DatePickerDialog datePickerDialog;
  Spinner s1, s2, s3;
  Button btnAdd;
  Button send;
  Button ok;
  Button ok1;
  private TextView result1;
  Button btn_send_mail;
  private Button button3;

  private Button btnexport;
  EditText inputLabel, s6;
  TextView tex, tex1, bResult;
  DatabaseHandler dbhndlr;

  Cursor spinner1csr, spinner2csr, spinner3csr, spinner4csr, search;
  SimpleCursorAdapter sca, sca2, sca3, sca4, sca6;
  long spinner1_selected = 0;
  CheckBox ck1, ck2, ck3, ck4, ck5, ck6, ck7, ck8;
  private SimpleDateFormat mSimpleDateFormat;
  private PeriodFormatter mPeriodFormat;

  private Date startDate;
  private Date endDate;
  private Date birthDate;

  private TextView tvStartDate, tvEndDate, tvDifferenceStandard, tvDifferenceCustom, tvBirthDate, tvAgeStandard, tvAgeCustom;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    s1 = (Spinner) findViewById(R.id.spinner1);
    s2 = (Spinner) findViewById(R.id.spinner2);
    s3 = (Spinner) findViewById(R.id.spinner5);
    final TextView bResult = (TextView) findViewById(R.id.barcodeResult);
    final EditText s6 = (EditText) findViewById(R.id.editText5);
    btnAdd = (Button) findViewById(R.id.btn_add);
    inputLabel = (EditText) findViewById(R.id.input_label);
    dbhndlr = new DatabaseHandler(this);
    if (DatabaseUtils.queryNumEntries(
        dbhndlr.getWritableDatabase(),
        DatabaseHandler.TABLE_LABELS) < 1) {
      dbhndlr.insertlabel("Ships", "12344", "9133");
      dbhndlr.insertlabel("Boat", "93993", "9045");
    }
    spinner1csr = dbhndlr.getAllLabelsAsCursor();
         sca = new SimpleCursorAdapter(this,
      android.R.layout.simple_list_item_1, spinner1csr,
      new String[] {
        DatabaseHandler.KEY_ID
      },
      new int[] {
        android.R.id.text1
      },
      0
    );
    s1.setAdapter(sca);
        s1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
      @Override
      public void onItemSelected(AdapterView << ? > parent, View view, int position, long id) {
              spinner1_selected = id;
        spinner2csr = dbhndlr.getByRowid(spinner1_selected);
        spinner3csr = dbhndlr.getByRowid(spinner1_selected);
        spinner4csr = dbhndlr.getByRowid(spinner1_selected);
        bResult.setText(spinner1csr.getString(spinner1csr.getColumnIndex(DatabaseHandler.KEY_ID1)));
        sca2.swapCursor(spinner2csr);
        sca3.swapCursor(spinner3csr);
        sca4.swapCursor(spinner4csr);
      }
      @Override
      public void onNothingSelected(AdapterView << ? > parent) {}
    });

    s6.addTextChangedListener(new TextWatcher() {
      @Override
      public void beforeTextChanged(CharSequence s, int start, int count, int after) {

      }

      @Override
      public void onTextChanged(CharSequence s, int start, int before, int count) {
        {


        }
      }

      @Override
      public void afterTextChanged(Editable s) {

        try {
          int nPosition = Integer.parseInt(s.toString());
          if (nPosition >= 1 && nPosition <= 12)
            s1.setSelection(nPosition - 1);
        } catch (NumberFormatException nfe) {}
      }
    });

    spinner2csr = dbhndlr.getByRowid(spinner1_selected);
    sca2 = new SimpleCursorAdapter(this,
      android.R.layout.simple_list_item_1,
      spinner2csr,
      new String[] {
        DatabaseHandler.KEY_NAME
      },
      new int[] {
        android.R.id.text1
      },
      0
    );
    s2.setAdapter(sca2);

    spinner3csr = dbhndlr.getByRowid(spinner1_selected);
    sca3 = new SimpleCursorAdapter(this,
      android.R.layout.simple_list_item_1,
      spinner3csr,
      new String[] {
        DatabaseHandler.KEY_ID1
      },
      new int[] {
        android.R.id.text1
      },
      0
    );
    s3.setAdapter(sca3);

    spinner4csr = dbhndlr.getByRowid(spinner1_selected);
    sca4 = new SimpleCursorAdapter(this,
      android.R.layout.simple_list_item_1,
      spinner4csr,
      new String[] {
        DatabaseHandler.KEY_ID1
      },

      new int[] {
        android.R.id.text1
      },

      0

    );
 
    btnAdd.setOnClickListener(new View.OnClickListener() {

      @Override
      public void onClick(View arg0) {
        String label = inputLabel.getText().toString();

        if (label.trim().length() > 0) {
 
          inputLabel.setText("");
          bResult.setText("");
          
          InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
          imm.hideSoftInputFromWindow(inputLabel.getWindowToken(), 0);

          spinner1csr = dbhndlr.getAllLabelsAsCursor();
          spinner2csr = dbhndlr.getByRowid(spinner1_selected);
          spinner3csr = dbhndlr.getByRowid(spinner1_selected);
          spinner4csr = dbhndlr.getByRowid(spinner1_selected);
          sca.swapCursor(spinner1csr);
          sca2.swapCursor(spinner2csr);
          sca3.swapCursor(spinner3csr);
          sca4.swapCursor(spinner4csr);

        } else {
          Toast.makeText(getApplicationContext(), "Please enter label name",
            Toast.LENGTH_SHORT).show();
        }
      }
    });
  }

  @Override
  public void onDestroy() {
    spinner1csr.close();
    spinner2csr.close();
    spinner3csr.close();
    spinner4csr.close();
    super.onDestroy();
  }
}

数据库处理程序.Java

package com.bar.example.myapplication;

public class DatabaseHandler extends SQLiteOpenHelper {
  private static final int DATABASE_VERSION = 1;

  private static final String DATABASE_NAME = "spinnerExample";

  public static final String TABLE_LABELS = "labels"; //<<<< Made public

  public static final String KEY_ID = "id"; //<<<< Made public
  public static final String KEY_NAME = "name";
  public static final String KEY_ID1 = "barcode"; //<<<< made public
  public static final String KEY_ID2 = "barcode1";
  public DatabaseHandler(Context context) {
    super(context, DATABASE_NAME, null, DATABASE_VERSION);
  }

  @Override
  public void onCreate(SQLiteDatabase db) {
    String CREATE_CATEGORIES_TABLE = "CREATE TABLE " + TABLE_LABELS + "(" +
      KEY_ID + " TEXT," + KEY_NAME + " TEXT," + KEY_ID1 + " TEXT," + KEY_ID2 + " TEXT)";
    db.execSQL(CREATE_CATEGORIES_TABLE);
  }

  @Override
  public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    db.execSQL("DROP TABLE IF EXISTS " + TABLE_LABELS);

    onCreate(db);
  }




  public void insertlabel(String id, String label, String label1) {
    SQLiteDatabase db = this.getWritableDatabase();
    ContentValues cv = new ContentValues();
    cv.put(KEY_ID, id);
    cv.put(KEY_NAME, label);
    cv.put(KEY_ID1, label1);

    db.insert(TABLE_LABELS, null, cv);
    db.close();
  }


  public List < String > getAllLabels() {
    List < String > labels = new ArrayList < String > ();

    String selectQuery = "SELECT  * FROM " + TABLE_LABELS;

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


    if (cursor.moveToFirst()) {
      do {
        labels.add(cursor.getString(0));
      } while (cursor.moveToNext());
    }


    cursor.close();
    db.close();

    return labels;
  }


  public Cursor getAllLabelsAsCursor() {
    String[] columns = new String[] {
      "rowid AS _id, *"
    }; // Need _id column for SimpleCursorAdapter
    return this.getWritableDatabase().query(TABLE_LABELS, columns, null, null, null, null, null);
  }


  public Cursor getAllLabelsExceptedSelected(long selected) {
    String[] columns = new String[] {
      "rowid AS _id, *"
    };
    String whereclause = "rowid <> ?";
    String[] whereargs = new String[] {
      String.valueOf(selected)
    };
    return this.getWritableDatabase().query(TABLE_LABELS,
      columns,
      whereclause,
      whereargs,

      null,
      null,
      null

    );
  }

  public Cursor getByRowid(long id) {
    String[] columns = new String[] {
      "rowid AS _id, *"
    };
    return this.getWritableDatabase().query(
      TABLE_LABELS,
      columns,
      "rowid=?",
      new String[] {
        String.valueOf(id)
      },
      null, null, null
    );


  }

}

Answer 1

花了更多时间在谷歌上搜索后，我有一个解决方法:)

但是这个答案会在点击按钮时将edittext值插入到微调器中。

但是任何人都知道如何使用 textwatcher 破解相同的内容。就像微调器应该在不点击按钮的情况下从edittext中输入值？？

public class MainActivity extends Activity {

  List < String > li;
  Spinner sp1, sp2;

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

    li = new ArrayList < String > ();

    li.add("Data 1");
    li.add("Data 2");

    sp1 = (Spinner) findViewById(R.id.spinner1);
    sp2 = (Spinner) findViewById(R.id.spinner2);
    Button b = (Button) findViewById(R.id.button1);
    final EditText et = (EditText) findViewById(R.id.editText1);
    call();

    b.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        // TODO Auto-generated method stub
        li.add(et.getText().toString());
        et.setText(null);
        call();
      }
    });
  }

  public void call() {
    // TODO Auto-generated method stub

    ArrayAdapter < String > adp = new ArrayAdapter < String > (this,
      android.R.layout.simple_dropdown_item_1line, li);
    adp.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
    sp1.setAdapter(adp);
    sp2.setAdapter(adp);
    sp1.setSelection((li.size() - 1));


    sp1.setOnItemSelectedListener(new OnItemSelectedListener() {

      @Override
      public void onItemSelected(AdapterView << ? > arg0, View arg1, int arg2, long arg3) {
        // TODO Auto-generated method stub
        sp2.setSelection(arg2);
      }

      @Override
      public void onNothingSelected(AdapterView << ? > arg0) {
        // TODO Auto-generated method stub
      }
    });
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.activity_main, menu);
    return true;
  }
}

布局

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent">

  <Spinner android:id="@+id/spinner1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:layout_marginLeft="34dp" android:layout_marginTop="74dp" />

  <Spinner android:id="@+id/spinner2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_alignParentTop="true" android:layout_marginTop="74dp" android:layout_marginRight="34dp"
  />

  <EditText android:id="@+id/editText1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:layout_marginTop="19dp" android:ems="10" android:inputType="textPersonName"
  />

  <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBottom="@+id/editText1" android:layout_alignParentRight="true" android:text="Button" />

</RelativeLayout>