要在Android SeekBar上顯示文本信息,可以通過自定義SeekBar和在其上方放置TextView來實現(xiàn)。以下是實現(xiàn)此效果的步驟:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<SeekBar
android:id="@+id/seekBar"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="0"
android:layout_centerHorizontal="true"
android:layout_below="@id/seekBar" />
</RelativeLayout>
public class MainActivity extends AppCompatActivity {
private SeekBar seekBar;
private TextView textView;
@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) {
}
});
}
}
通過以上步驟,您可以在Android SeekBar上顯示文本信息,并隨著SeekBar的滑動而更新文本內容。