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In meiner benutzerdefinierten Listenansicht, wenn ich versuche, nach unten scrollen, um ein neues Listenelement (entweder unten oder oben) zu sehen, wird die Schriftrolle Laggy. Ich bin irgendwie neu in Android-Entwicklung und Datenbank, so weiß ich nicht, was die Ursache dafür ist.Android benutzerdefinierte listview load langsam beim scrollen
Das ist mein MainActivity
public class MainActivity extends AppCompatActivity implements CustomAdapter.passing{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_loading);
db = new DBHandler(this,null,null,1);
namaDoctor = this.getResources().getStringArray(R.array.namaDokter);
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
setContentView(R.layout.activity_main);
searchSpesIcon = (ImageView) findViewById(R.id.buttonSearchSpesial);
searchRsIcon = (ImageView) findViewById(R.id.buttonSearchRs);
searchField = (EditText) findViewById(R.id.searchField);
searchDocIcon = (ImageView) findViewById(R.id.buttonSearchDoctor);
help = (LinearLayout) findViewById(R.id.help_view);
searchDocIcon.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
keyword = searchField.getText().toString();
query = "SELECT * FROM doctor WHERE nama LIKE '%"+keyword+"%';";
namaDoctor = db.searchDoctor(query);
id = db.getDoctorId();
lokasia = db.getDoctorLokasiA();
lokasib = db.getDoctorLokasiB();
lokasic = db.getDoctorLokasiC();
alamata = db.getDoctorAlamatA();
alamatb = db.getDoctorAlamatB();
alamatc = db.getDoctorAlamatC();
if(tes != namaDoctor.length){
change();
Toast.makeText(getApplicationContext(),"Hasil pencarian nama dokter " +keyword,Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(getApplicationContext(),"Tidak ada hasil",Toast.LENGTH_SHORT).show();
}
}
});
searchSpesIcon.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
keyword = searchField.getText().toString();
query = "SELECT * FROM doctor WHERE spesialisasi LIKE '%"+keyword+"%';";
namaDoctor = db.searchDoctor(query);
id = db.getDoctorId();
lokasia = db.getDoctorLokasiA();
lokasib = db.getDoctorLokasiB();
lokasic = db.getDoctorLokasiC();
alamata = db.getDoctorAlamatA();
alamatb = db.getDoctorAlamatB();
alamatc = db.getDoctorAlamatC();
if(tes != namaDoctor.length){
change();
Toast.makeText(getApplicationContext(),"Hasil pencarian dokter spesialisasi " +keyword,Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(getApplicationContext(),"Tidak ada hasil",Toast.LENGTH_SHORT).show();
}
}
});
searchRsIcon.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
keyword = searchField.getText().toString();
query = "SELECT * FROM doctor " +
"WHERE lokasia LIKE '%"+keyword+"%' OR lokasib LIKE '%"+keyword+"%' OR lokasic LIKE '%"+keyword+"%';";
namaDoctor = db.searchDoctor(query);
id = db.getDoctorId();
lokasia = db.getDoctorLokasiA();
lokasib = db.getDoctorLokasiB();
lokasic = db.getDoctorLokasiC();
alamata = db.getDoctorAlamatA();
alamatb = db.getDoctorAlamatB();
alamatc = db.getDoctorAlamatC();
if(tes != namaDoctor.length){
change();
Toast.makeText(getApplicationContext(),"Hasil pencarian dokter di rumah sakit " +keyword,Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(getApplicationContext(),"Tidak ada hasil",Toast.LENGTH_SHORT).show();
}
}
});
}
},milis);
}
void change(){
if(help.getVisibility()==View.VISIBLE){help.setVisibility(View.GONE);}
cAdapter = new CustomAdapter(this,namaDoctor,id);
//use callback
cAdapter.setPass(this);
list = (ListView) findViewById(R.id.listContatiner);
list.setAdapter(cAdapter);
cAdapter.notifyDataSetChanged();
}
@Override
public void getTag1(int t){
p1=t;
}
@Override
public void getTag2(int t2) {
p2=t2;
setNewAct(p1,p2);
}
public void setNewAct(int x, int y){
//some method
}
Meine CustomAdapter Klasse
public class CustomAdapter extends ArrayAdapter {
Context c1;
String s1[];
Integer id[];
String spesialisasi[] ;
String daerahPraktek[];
int arrayImageDoctor[] = {R.drawable.doctor_1...};
public CustomAdapter(Context c, String s[], Integer i[]) {
super(c,R.layout.item_doctor,s);
this.c1=c;
this.s1=s;
this.id=i;
}
private passing pass;
@Override
public View getView(final int position, View v, ViewGroup parent) {
final LayoutInflater li=(LayoutInflater) c1.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = li.inflate(R.layout.item_doctor,null);
spesialisasi= c1.getResources().getStringArray(R.array.spesialiasiDokter);
daerahPraktek = c1.getResources().getStringArray(R.array.daerahDokter);
final TextView nama = (TextView) v.findViewById(R.id.namaDoctor);
TextView spesial = (TextView) v.findViewById(R.id.spesialisasiDoctor);
TextView daerah = (TextView) v.findViewById(R.id.daerahPraktekDoctor);
ImageView ImageDoc = (ImageView) v.findViewById(R.id.imageListDoctor);
Button lokasi = (Button) v.findViewById(R.id.lokasiPraktek);
nama.setText(s1[position]);
spesial.setText("Dokter " + spesialisasi[id[position]]);
daerah.setText(daerahPraktek[id[position]]);
ImageDoc.setImageResource(arrayImageDoctor[id[position]]);
lokasi.setTag(R.id.tag1,id[position]);
lokasi.setTag(R.id.tag2,position);
lokasi.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int tag = (int) v.getTag(R.id.tag1);
int pos = (int) v.getTag(R.id.tag2);
pass.getTag1(tag);
pass.getTag2(pos);
}
});
return v;
}
public void setPass(passing pass){
this.pass=pass;
}
public interface passing{
void getTag1(int t1);
void getTag2(int t2);
}
Meine DBHandler Klasse
public class DBHandler extends SQLiteOpenHelper {
public DBHandler(Context context, String name, SQLiteDatabase.CursorFactory factory, int version) {
super(context, DATABASE_NAME, factory, DATABASE_VERSION);
c=context;
}
@Override
public void onCreate(SQLiteDatabase db) {
String query = "CREATE TABLE " + TABLE_DOCTOR + "(" +
COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
COLUMN_NAMA + " TEXT, " +
COLUMN_DAERAH + " TEXT, " +
COLUMN_SPESIALISASI + " TEXT, " +
COLUMN_LOKASI_A + " TEXT, " +
COLUMN_LOKASI_B + " TEXT, " +
COLUMN_LOKASI_C + " TEXT, " +
COLUMN_ALAMAT_A + " TEXT, " +
COLUMN_ALAMAT_B + " TEXT, " +
COLUMN_ALAMAT_C + " TEXT " +");";
db.execSQL(query);
arrayNama = c.getResources().getStringArray(R.array.namaDokter);
arrayDaerah = c.getResources().getStringArray(R.array.daerahDokter);
arraySpesialisasi = c.getResources().getStringArray(R.array.spesialiasiDokter);
arrayLokasiA = c.getResources().getStringArray(R.array.lokasiA);
arrayLokasiB = c.getResources().getStringArray(R.array.lokasiB);
arrayLokasiC = c.getResources().getStringArray(R.array.lokasiC);
arrayAlamatA = c.getResources().getStringArray(R.array.alamatA);
arrayAlamatB = c.getResources().getStringArray(R.array.alamatB);
arrayAlamatC = c.getResources().getStringArray(R.array.alamatC);
ContentValues cv = new ContentValues();
for (int i = 0; i < arrayNama.length; i++) {
cv.put(COLUMN_NAMA, arrayNama[i]);
cv.put(COLUMN_DAERAH, arrayDaerah[i]);
cv.put(COLUMN_SPESIALISASI, arraySpesialisasi[i]);
cv.put(COLUMN_LOKASI_A, arrayLokasiA[i]);
cv.put(COLUMN_LOKASI_B, arrayLokasiB[i]);
cv.put(COLUMN_LOKASI_C, arrayLokasiC[i]);
cv.put(COLUMN_ALAMAT_A, arrayAlamatA[i]);
cv.put(COLUMN_ALAMAT_B, arrayAlamatB[i]);
cv.put(COLUMN_ALAMAT_C, arrayAlamatC[i]);
db.insert(TABLE_DOCTOR, null, cv);
}
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS " + TABLE_DOCTOR);
db.execSQL("DROP TABLE IF EXISTS " + TABLE_PATIENT);
onCreate(db);
}
public String[] searchDoctor(String qdoc){
SQLiteDatabase db = getWritableDatabase();
Cursor c= db.rawQuery(qdoc,null);
String selectedDoc[] = new String[c.getCount()];
Integer selectedId[] = new Integer[c.getCount()];
String selectedLokasiA[] = new String[c.getCount()];
String selectedLokasiB[] = new String[c.getCount()];
String selectedLokasiC[] = new String[c.getCount()];
String selectedAlamatA[] = new String[c.getCount()];
String selectedAlamatB[] = new String[c.getCount()];
String selectedAlamatC[] = new String[c.getCount()];
int i = 0;
while(c.moveToNext()){
String doc = c.getString(c.getColumnIndex(COLUMN_NAMA));
Integer id = c.getInt(c.getColumnIndex(COLUMN_ID));
String lokasia = c.getString(c.getColumnIndex(COLUMN_LOKASI_A));
String lokasib = c.getString(c.getColumnIndex(COLUMN_LOKASI_B));
String lokasic = c.getString(c.getColumnIndex(COLUMN_LOKASI_C));
String alamata = c.getString(c.getColumnIndex(COLUMN_ALAMAT_A));
String alamatb = c.getString(c.getColumnIndex(COLUMN_ALAMAT_B));
String alamatc = c.getString(c.getColumnIndex(COLUMN_ALAMAT_C));
selectedDoc[i]= doc;
selectedId[i] = id-1;
selectedLokasiA[i]= lokasia;
selectedLokasiB[i] = lokasib;
selectedLokasiC[i] = lokasic;
selectedAlamatA[i]= alamata;
selectedAlamatB[i]=alamatb;
selectedAlamatC[i]= alamatc;
i++;
}
this.doctorId=selectedId;
this.doctorLokasiA=selectedLokasiA;
this.doctorLokasiB=selectedLokasiB;
this.doctorLokasiC=selectedLokasiC;
this.doctorAlamatA=selectedAlamatA;
this.doctorAlamatB=selectedAlamatB;
this.doctorAlamatC=selectedAlamatC;
return selectedDoc;
}
public Integer[] getDoctorId(){
return doctorId;
}
public static String[] getDoctorLokasiA() {
return doctorLokasiA;
}
public static String[] getDoctorLokasiB() {
return doctorLokasiB;
}
public static String[] getDoctorLokasiC() {
return doctorLokasiC;
}
public static String[] getDoctorAlamatA() {
return doctorAlamatA;
}
public static String[] getDoctorAlamatB() {
return doctorAlamatB;
}
public static String[] getDoctorAlamatC() {
return doctorAlamatC;
}
Und mein Item_doctor.xml
<RelativeLayout
android:id="@+id/itemCLick"
android:background="#0E9EA1"
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="15dp">
<ImageView
android:layout_width="100dp"
android:layout_height="100dp"
android:src="@drawable/doctor_1"
android:id="@+id/imageListDoctor"/>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_alignParentTop="true"
android:layout_toRightOf="@+id/imageListDoctor"
android:layout_toEndOf="@+id/imageListDoctor"
android:id="@+id/linearLayout">
<TextView
android:layout_marginTop="10dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Nama"
android:id="@+id/namaDoctor"/>
<TextView
android:layout_marginTop="10dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Spesialis"
android:id="@+id/spesialisasiDoctor"/>
<TextView
android:layout_marginTop="10dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Daerah"
android:id="@+id/daerahPraktekDoctor"/>
</LinearLayout>
<Button
android:layout_width="115dp"
android:layout_height="wrap_content"
android:text="Lihat lokasi praktek"
android:layout_alignBottom="@+id/linearLayout"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:id="@+id/lokasiPraktek"
android:onClick="LokasiPraktek"/>
Kann mir jemand sagen:
1.Does Cursor auf Array Einfügen und SQLite Abfrage kann großes Leistungsproblem verursachen, wenn sie nicht richtig gemacht?
2.Die Menge der Ansicht in dem Element einer Liste kann sich auf die Leistung auswirken?
3.Was andere Dinge, die die ListView-Leistung beeinflussen?
Es wird gut sein, wenn jemand mir sagen wird, in welchem Teil meines Codes ich ändern muss, um die Bildlaufgeschwindigkeit zu erhöhen.
Danke, die Scroll funktioniert jetzt viel besser –
, wenn Sie diese Antwort nützlich upvote dieser answer.So finden Andere können diese Antwort direkt überprüfen –