【发布时间】：2014-09-25 03:06:46
【问题描述】：
大家好，我有一个数据库。我可以将文本保存在我的数据库中。但是如何将刚刚创建的复选框保存到我的数据库中？
我必须在我的数据库中为此创建多少列？只为所有或更多 列 ？
例如，我创建了 3 个复选框：
1.checkbox“获取牛奶”
2.checkbox "得到面包"
3.checkbox“上班”
如何将文本和复选框保存到我的数据库中？谢谢你帮助我，提前。 :)
这是要输入的文本代码：
import android.app.Activity;
import android.content.ContentValues;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.RadioGroup;
import android.widget.Spinner;
import android.widget.Toast;
import de.vogella.android.todos.contentprovider.MyTodoContentProvider;
import de.vogella.android.todos.database.TodoTable;
public class TodoDetailActivity extends Activity {
private Spinner mCategory;
private EditText mTitleText;
private EditText mAuswirkungen;
private EditText mBodyText;
private Uri todoUri;
@Override
protected void onCreate(Bundle bundle) {
super.onCreate(bundle);
setContentView(R.layout.todo_edit);
///////// Create new Checkbox with text in it///////////
final EditText txtTitle = (EditText) findViewById(R.id.txtTitle);
final Button btnCreate = (Button) findViewById(R.id.btnCreate);
final RadioGroup radContainer = (RadioGroup) findViewById(R.id.radContainer);
final LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
btnCreate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String name = txtTitle.getText().toString().trim();
if (!name.isEmpty()) {
CheckBox checkBox = new CheckBox(TodoDetailActivity.this);
checkBox.setText(name);
checkBox.setLayoutParams(params);
radContainer.addView(checkBox);
} else {
Toast.makeText(TodoDetailActivity.this,
"Set new Checkbox", Toast.LENGTH_SHORT).show();
}
}
});
mAuswirkungen = (EditText) findViewById(R.id.auswirkungen);
mCategory = (Spinner) findViewById(R.id.category);
mTitleText = (EditText) findViewById(R.id.todo_edit_summary);
mBodyText = (EditText) findViewById(R.id.todo_edit_description);
Button confirmButton = (Button) findViewById(R.id.todo_edit_button);
Bundle extras = getIntent().getExtras();
// Check from the saved Instance
todoUri = (bundle == null) ? null : (Uri) bundle
.getParcelable(MyTodoContentProvider.CONTENT_ITEM_TYPE);
// Or passed from the other activity
if (extras != null) {
todoUri = extras
.getParcelable(MyTodoContentProvider.CONTENT_ITEM_TYPE);
fillData(todoUri);
}
confirmButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
if (TextUtils.isEmpty(mTitleText.getText().toString())) {
makeToast();
} else {
setResult(RESULT_OK);
finish();
}
}
});
}
private void fillData(Uri uri) {
String[] projection = { TodoTable.COLUMN_SUMMARY,
TodoTable.COLUMN_DESCRIPTION, TodoTable.COLUMN_CATEGORY,
TodoTable.COLUMN_AUSWIRKUNGEN };
Cursor cursor = getContentResolver().query(uri, projection, null, null,
null);
if (cursor != null) {
cursor.moveToFirst();
String category = cursor.getString(cursor
.getColumnIndexOrThrow(TodoTable.COLUMN_CATEGORY));
for (int i = 0; i < mCategory.getCount(); i++) {
String s = (String) mCategory.getItemAtPosition(i);
if (s.equalsIgnoreCase(category)) {
mCategory.setSelection(i);
}
}
mAuswirkungen.setText(cursor.getString(cursor
.getColumnIndexOrThrow(TodoTable.COLUMN_AUSWIRKUNGEN)));
mTitleText.setText(cursor.getString(cursor
.getColumnIndexOrThrow(TodoTable.COLUMN_SUMMARY)));
mBodyText.setText(cursor.getString(cursor
.getColumnIndexOrThrow(TodoTable.COLUMN_DESCRIPTION)));
// Always close the cursor
cursor.close();
}
}
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
saveState();
outState.putParcelable(MyTodoContentProvider.CONTENT_ITEM_TYPE, todoUri);
}
@Override
protected void onPause() {
super.onPause();
saveState();
}
private void saveState() {
String category = (String) mCategory.getSelectedItem();
String summary = mTitleText.getText().toString();
String description = mBodyText.getText().toString();
String auswirkungen = mAuswirkungen.getText().toString();
// Only save if either summary or description
// is available
if (description.length() == 0 && summary.length() == 0) {
return;
}
ContentValues values = new ContentValues();
values.put(TodoTable.COLUMN_CATEGORY, category);
values.put(TodoTable.COLUMN_SUMMARY, summary);
values.put(TodoTable.COLUMN_DESCRIPTION, description);
values.put(TodoTable.COLUMN_AUSWIRKUNGEN, auswirkungen);
if (todoUri == null) {
// New todo
todoUri = getContentResolver().insert(
MyTodoContentProvider.CONTENT_URI, values);
} else {
// Update todo
getContentResolver().update(todoUri, values, null, null);
}
}
private void makeToast() {
Toast.makeText(TodoDetailActivity.this, "Please maintain a summary",
Toast.LENGTH_LONG).show();
}
}
这是我的数据库
导入 android.database.sqlite.SQLiteDatabase; 导入android.util.Log；
公共类 TodoTable {
// Database table
public static final String TABLE_TODO = "todo";
public static final String COLUMN_ID = "_id";
public static final String COLUMN_CATEGORY = "category";
public static final String COLUMN_SUMMARY = "summary";
public static final String COLUMN_DESCRIPTION = "description";
public static final String COLUMN_AUSWIRKUNGEN = "auswirkungen";
// Database creation SQL statement
private static final String DATABASE_CREATE = "create table " + TABLE_TODO
+ "(" + COLUMN_ID + " integer primary key autoincrement, " + ""
+ COLUMN_CATEGORY + " text not null, " + COLUMN_SUMMARY
+ " text not null," + COLUMN_DESCRIPTION + " text not null, "
+ COLUMN_AUSWIRKUNGEN + " text not null" + ");";
public static void onCreate(SQLiteDatabase database) {
database.execSQL(DATABASE_CREATE);
}
public static void onUpgrade(SQLiteDatabase database, int oldVersion,
int newVersion) {
Log.w(TodoTable.class.getName(), "Upgrading database from version "
+ oldVersion + " to " + newVersion
+ ", which will destroy all old data");
database.execSQL("DROP TABLE IF EXISTS " + TABLE_TODO);
onCreate(database);
}
}
【问题讨论】：
标签： android eclipse sqlite checkbox multiple-columns