1.SeekBar:
(1)
(2)SeekBar代码示例:
Java代码:
package com.example.myapplication_2; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.widget.SeekBar; import android.widget.TextView; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); TextView textView = (TextView)findViewById(R.id.tv_view); SeekBar seekBar = (SeekBar)findViewById(R.id.seeker_bar); seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() { @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { textView.setText(String.valueOf(progress-100)); //将原来的0——200范围的值变为-100——100 } @Override public void onStartTrackingTouch(SeekBar seekBar) { } @Override public void onStopTrackingTouch(SeekBar seekBar) { } }); } }
布局代码:
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