效果图
xml文件：
<?xml version="1.0" encoding="utf-8"?> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" xmlns:android="http://schemas.android.com/apk/res/android"> <!--max：设置进度条的最大值 progress：这是初始默认值--> <SeekBar android:layout_width="match_parent" android:layout_height="wrap_content" android:max="255" android:progress="255" android:id="@+id/sb_main_seek" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/tv_main_text" android:layout_gravity="center" /> </LinearLayout>
java代码：
package com.example.blogtest; import android.graphics.BitmapFactory; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.Gravity; import android.widget.CompoundButton; import android.widget.RatingBar; import android.widget.SeekBar; import android.widget.Switch; import android.widget.TextView; import android.widget.Toast; import android.widget.ToggleButton; public class MainActivity extends AppCompatActivity { private TextView tv_main_text; private SeekBar sb_main_seek; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //根据id获得SeekBar的控件 sb_main_seek = (SeekBar) findViewById(R.id.sb_main_seek); tv_main_text = (TextView) findViewById(R.id.tv_main_text); //设置SeekBar控件的监听 sb_main_seek.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener(){ @Override //获取滑动过程的值 public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { tv_main_text.setText("当前的值为："+progress); } //开始滑动 @Override public void onStartTrackingTouch(SeekBar seekBar) { } //结束滑动 @Override public void onStopTrackingTouch(SeekBar seekBar) { } }); } }
