這個程序是爲了在Listview中顯示數據庫的類。我想通過給定的關鍵字添加在數據庫中搜索所需的數據。如何添加搜索代碼數據庫與關鍵字在同一類如何搜索數據庫中的一些關鍵字android
public class DisplayActivity extends Activity
{
private ArrayList<String> arraylist=new ArrayList<String>();
private SQLiteDatabase MYdatabase;
ListView listView;
Button back;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.display);
listView=(ListView)findViewById(R.id.listView1);
DatabaseHelper db=new DatabaseHelper(this);
MYdatabase=db.getWritableDatabase();
try {
Cursor c=MYdatabase.rawQuery("SELECt * FROM Student", null);
if(c!=null)
{
if(c.moveToFirst())
{
do {
String name=c.getString(c.getColumnIndex("NAME"));
String age=c.getString(c.getColumnIndex("AGE"));
String address=c.getString(c.getColumnIndex("ADDRESS"));
arraylist.add("Name :"+name+"\n"+"Age :"+age+"\n"+"Address :"+address+"\n");
} while (c.moveToNext());
}
}
c.close();
c.deactivate();
} catch (SQLiteException e) {
Log.d(getClass().getSimpleName(), "could not create"+"or open the database");
}
finally
{
if(MYdatabase!=null)
{
MYdatabase.close();
}
}
listView.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,arraylist));
}
public void Back(View v)
{
Intent back=new Intent(DisplayActivity.this,DbExampleActivity.class);
startActivity(back);
}
}
以下是活動類代碼。 認爲它會很容易理解
public class DbExampleActivity extends Activity implements OnClickListener{
Button submit,select,search;
AlertDialog di;
private SQLiteDatabase sqLiteDatabase;
private SQLiteStatement sqLiteStatement;
private String name,age,address;
private static final String TABLE_NAME="Student";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
submit=(Button)findViewById(R.id.savebutton);
select=(Button)findViewById(R.id.detailsbutton);
search=(Button)findViewById(R.id.searchbutton);
DatabaseHelper db=new DatabaseHelper(this);
sqLiteDatabase=db.getWritableDatabase();
sqLiteStatement=sqLiteDatabase.compileStatement("insert into "+TABLE_NAME+"(name,age,address)values(?,?,?)");
submit.setOnClickListener(this);
select.setOnClickListener(this);
search.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.detailsbutton:
Intent in=new Intent(getApplicationContext(),DisplayActivity.class);
startActivity(in);
break;
case R.id.savebutton:
name=((EditText)findViewById(R.id.editText1)).getText().toString().trim();
age=((EditText)findViewById(R.id.editText2)).getText().toString().trim();
address=((EditText)findViewById(R.id.editText3)).getText().toString().trim();
sqLiteStatement.bindString(1, name);
sqLiteStatement.bindString(2, age);
sqLiteStatement.bindString(3, address);
sqLiteStatement.executeInsert();
Toast.makeText(getApplicationContext(), "Data Saved", Toast.LENGTH_LONG).show();
break;
case R.id.searchbutton:
Intent search=new Intent(getApplicationContext(),DisplayActivity.class);
startActivity(search);
default:
break;
}
}
}
什麼代碼將被添加到該允許搜索使用關鍵字
你可以使用這樣的查詢'「SELECT * FROM學生WHERE ID =」 + ID' – 2619
謝謝......但這些關鍵字鍵入edittext..i硝基甲苯知道如何鏈接... dnt介意我是新手機android –