android SeekBar(带滑动块的进度条)的应用举例
16lz
2021-01-23
AppMain.java
package lxy.listsoft;import android.app.Activity;import android.os.Bundle;import android.util.Log;import android.widget.SeekBar;import android.widget.TextView;public class AppMain extends Activity {private TextView textView;private SeekBar seekBar;int seekBarProgress;MyThread thread;boolean key = true; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); textView = (TextView)findViewById(R.id.testView01); seekBar = (SeekBar)findViewById(R.id.seekBar01); seekBar.setMax(200); seekBar.setOnSeekBarChangeListener(new SeekBarListener()); } protected void onResume() {super.onResume();thread = new MyThread();thread.start();}//SeekBar的监听器 class SeekBarListener implements SeekBar.OnSeekBarChangeListener{ //当进度改变时，参数fromUser判断是不是进度的改变由用户手动引起public void onProgressChanged(SeekBar seekBar, int progress,boolean fromUser) {if(fromUser){Log.d("test", ""+progress);seekBarProgress = progress;}textView.setText(""+progress);}//当用户开始滑动时public void onStartTrackingTouch(SeekBar seekBar) {key = false;Log.d("test", "myThread stop");}//当用户结束滑动时public void onStopTrackingTouch(SeekBar seekBar) {Log.d("test", "myThread isAlive"+thread.isAlive());key = true;thread = new MyThread();thread.start();Log.d("test", "myThread isAlive"+thread.isAlive());} } class MyThread extends Thread{public void run() {super.run();while(key){try {Thread.sleep(500);} catch (InterruptedException e) {e.printStackTrace();}seekBarProgress++;if(seekBarProgress > 200){seekBarProgress = 0;}seekBar.setProgress(seekBarProgress);}} }} main.xml
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" ><TextView android:id="@+id/testView01"android:textSize="20pt"android:gravity="center_vertical|center_horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="0"/><SeekBarandroid:id="@+id/seekBar01"android:layout_width="fill_parent"android:layout_height="wrap_content"></SeekBar></LinearLayout>
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