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SeekBar elementining setOnSeekBarChangeListener()
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| bet | 9/19 | | Sana | 14.03.2022 | | Hajmi | 1.09 Mb. | | #18629 |
Bog'liq Android Studio ma`ruzalar 1-Obektga yo`nzltirilgan dasturity taminot, 6-Laboratoriya ishi (2), 123, Arifmetikaning asosiy teoremasi, Programmalıq injiniringge kirisiw paninen 3-ameliy jumisi, tranzistor (1), Документ Microsoft Word (8), 2.-7, 1-7, Denov tadbirkorlik va pedagogika instituti, 111, titul, Xorazm, 1- topshiriqSeekBar elementining setOnSeekBarChangeListener() metodini kodimizga qo'shishimiz lozim, bu slayder qiymatini o'zgartirish uchun voqea ishlovchilarini o'rnatishga imkon beradi. Keling, ushbu funktsional imkoniyatlardan foydalanamiz. activity_main.xml fayliga quyidagi kodni kiriting:
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="16dp">
<TextView
android:id="@+id/textView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:textAlignment="center"
android:textSize="36sp" />
android:id="@+id/seekBar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:max="50"
android:progress="20" />
Yuqoridagi kodda TextView elementi qo'shilgan, u slayderning joriy qiymatini aks ettiradi.
Va MainActivity.java kodini o'zgartiraylik:
package com.example.android.seekbar;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.SeekBar;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
TextView textView;
SeekBar seekBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
seekBar = findViewById(R.id.seekBar);
textView = findViewById(R.id.textView);
seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
textView.setText(String.valueOf(progress));
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
}
}
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