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  • 一手遮天 Android

    项目地址 https://github.com/webabcd/AndroidDemo
    作者 webabcd

    一手遮天 Android - view(进度类): SeekBar 基础

    示例如下:

    /view/progress/SeekBarDemo1.java

    /**
     * SeekBar - 拖动条
     *     setOnSeekBarChangeListener(OnSeekBarChangeListener l) - 拖动条发生改变时的回调
     * OnSeekBarChangeListener
     *     onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) - 进度值发生变化
     *         progress - 当前进度值
     *         fromUser - 是否是用户操作导致的进度变化(比如用户拖动了进度则此值为 true;程序修改了进度则此值为 false)
     *     onStartTrackingTouch(SeekBar seekBar) - 拖动开始
     *     onStopTrackingTouch(SeekBar seekBar) - 拖动结束
     */
    
    package com.webabcd.androiddemo.view.progress;
    
    import androidx.appcompat.app.AppCompatActivity;
    import android.os.Bundle;
    import android.widget.SeekBar;
    import android.widget.TextView;
    import android.widget.Toast;
    
    import com.webabcd.androiddemo.R;
    
    public class SeekBarDemo1 extends AppCompatActivity {
    
        private TextView _textView1;
        private SeekBar _seekBar1;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_view_progress_seekbardemo1);
    
            _textView1 = (TextView)findViewById(R.id.textView1);
            _seekBar1 = (SeekBar)findViewById(R.id.seekBar1);
    
            sample();
        }
    
        private void sample() {
            _seekBar1.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
                @Override
                public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                    _textView1.setText(String.format("progress:%d, fromUser:%b", progress, fromUser));
                }
    
                @Override
                public void onStartTrackingTouch(SeekBar seekBar) {
                    Toast.makeText(getApplicationContext(), "start tracking touch", Toast.LENGTH_SHORT).show();
                }
    
                @Override
                public void onStopTrackingTouch(SeekBar seekBar) {
                    Toast.makeText(getApplicationContext(), "stop tracking touch", Toast.LENGTH_SHORT).show();
                }
            });
    
            // 在 java 中设置拖动条的进度
            _seekBar1.setProgress(30);
        }
    }
    
    

    /layout/activity_view_progress_seekbardemo1.xml

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">
    
        <!--
            SeekBar - 拖动条
                min - 最小值
                max - 最大值
                progress - 进度值(相当于播放器的当前播放位置)
                secondaryProgress - 第二进度的进度值(相当于播放器的当前已缓冲位置)
        -->
    
        <TextView
            android:id="@+id/textView1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    
        <SeekBar
            android:id="@+id/seekBar1"
            android:layout_width="300dp"
            android:layout_height="30dp"
            android:layout_marginTop="10dp"
            android:min="0"
            android:max="100"
            android:progress="10"
            android:secondaryProgress="70" />
    
    </LinearLayout>
    
    

    项目地址 https://github.com/webabcd/AndroidDemo
    作者 webabcd

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  • 原文地址:https://www.cnblogs.com/webabcd/p/android_view_progress_SeekBarDemo1.html
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