Android安卓经典设计例程源代码-SeekerBarSample.rar

package tjuci.edu.dl; import android.app.Activity; import android.os.Bundle; import android.widget.ImageView; import android.widget.SeekBar; import android.widget.SeekBar.OnSeekBarChangeListener; public class SeekerBarSampleActivity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); final ImageView imageView = (ImageView)findViewById(R.id.imageview); final SeekBar seekerBar = (SeekBar)findViewById(R.id.seekbar); seekerBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() { @Override public void onStopTrackingTouch(SeekBar seekBar) { // TODO Auto-generated method stub } @Override public void onStartTrackingTouch(SeekBar seekBar) { // TODO Auto-generated method stub } @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { // TODO Auto-generated method stub imageView.setAlpha(seekerBar.getProgress()); } }); } }