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android progressBar和seekBar的小DEMO

2024-07-15 21:49:42   222人阅读

 

 

这里演示的是android ProgressBar的条形进度条，因为android条形进度条初始时静态的而不像圆形的进度条是动态的；

而seekbar是android的拖动条，使用场景比如在音乐播放或者视频播放的时候~~~~

xml布局文件（需要注意，在使用条形进度条的时候要选择的style类型为

"?android:attr/progressBarStyleHorizontal"

）：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".MainActivity"     android:background="#BBBB0000">    <ProgressBar        android:id="@+id/pb"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        style="?android:attr/progressBarStyleHorizontal"        android:max="100"        android:progress="50"        android:secondaryProgress="70"/>    <SeekBar        android:id="@+id/seekbar"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:layout_below="@id/pb"        android:text="拖动"/></RelativeLayout>

 

mainActivity.java文件：

import android.app.Activity;import android.os.Bundle;import android.util.Log;import android.widget.ProgressBar;import android.widget.SeekBar;import android.widget.SeekBar.OnSeekBarChangeListener;public class MainActivity extends Activity implements Runnable, OnSeekBarChangeListener {    private ProgressBar pb;    private Thread th;    boolean statechange;    SeekBar seekbar;    private String tag = "SEEKBAR";    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        pb = (ProgressBar)findViewById(R.id.pb);        seekbar = (SeekBar)findViewById(R.id.seekbar);        seekbar.setOnSeekBarChangeListener(this);        th = new Thread(this);        th.start();    }    @Override    public void onProgressChanged(SeekBar arg0, int arg1, boolean arg2) {        // TODO Auto-generated method stub        Log.v(tag, "拖动改变");    }    @Override    public void onStartTrackingTouch(SeekBar arg0) {        // TODO Auto-generated method stub        Log.v(tag, "改变中");    }    @Override    public void onStopTrackingTouch(SeekBar arg0) {        // TODO Auto-generated method stub        Log.v(tag, "停止改变");    }    @Override    public void run() {        // TODO Auto-generated method stub        while (true){            int current = pb.getProgress();            int currentMax = pb.getMax();            int seccurrent = pb.getSecondaryProgress();            if (statechange == false) {                if (current < currentMax) {                    pb.setProgress(current +1);                    pb.setSecondaryProgress(current +1);                }else if (current == currentMax) {                    statechange = true;                }            }            else{                if (current > 0) {                    pb.setProgress(current -1);                    pb.setSecondaryProgress(current -1);                }else if (current == 0) {                    statechange = false;                }            }            try {                Thread.sleep(100);            } catch (Exception e) {                // TODO: handle exception                e.printStackTrace();            }        }    }    }

运行效果（进度条的业务代码是实现模拟进度的不断变化）

图片居然不能上传了今天 ，等一下再补上吧。

 


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