EditText值未显示。
示例：编辑文本应显示＆＃34; 9045＆＃34;如果Spinner值是Boat，那么它应该反过来我的意思是如果它是Edit Text值是9045那么我的微调器值应该是Boat。
在许多方面尝试过，但它一直在失败。
主要活动代码是
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, bResult;
TextView tex, tex1;
DatabaseHandler dbhndlr;
Cursor spinner1csr, spinner2csr, spinner3csr, spinner4csr;
SimpleCursorAdapter sca, sca2, sca3, sca4;
long spinner1_selected = 0;
CheckBox ck1, ck2, ck3, ck4, ck5, ck6, ck7, ck8;
@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);
bResult = (EditText) findViewById(R.id.barcodeResult);
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);
// Set Spinner1 OnSelectedItemListener
s1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView << ? > parent, View view, int position, long id) {
// bResult.setText(s1.getSelectedItem().toString());
spinner1_selected = id;
spinner2csr = dbhndlr.getByRowid(spinner1_selected);
spinner3csr = dbhndlr.getByRowid(spinner1_selected);
spinner4csr = dbhndlr.getByRowid(spinner1_selected);
sca2.swapCursor(spinner2csr);
sca3.swapCursor(spinner3csr);
sca4.swapCursor(spinner4csr);
}
@Override
public void onNothingSelected(AdapterView << ? > parent) {}
});
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
);
bResult.setAdapter(sca4);
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();
}
}
Databasehandler代码是。
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";
public static final String KEY_ID = "id";
public static final String KEY_NAME = "name";
public static final String KEY_ID1 = "barcode";
public DatabaseHandler(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
// Category table create query
String CREATE_CATEGORIES_TABLE = "CREATE TABLE " + TABLE_LABELS + "(" +
KEY_ID + " TEXT," + KEY_NAME + " TEXT," + KEY_ID1 + " 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());
}
// closing connection
cursor.close();
db.close();
return labels;
}
public Cursor getAllLabelsAsCursor() {
String[] columns = new String[] {
"rowid AS _id, *"
};
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
);
}
}
答案 0 :(得分：1)
从我们的会员MikeT帖子中找到答案。
假设TextView是bresult，那么在onItemSelected方法中只需添加bresult.setText（spinner1csr.getString（spinner1csr.getColumnIndex（DatabaseHandler.KEY_NAME）））;