Android SeekBar使用

package com.android.xiong.gridlayoutTest;

import android.annotation.TargetApi;

import android.app.Activity;

import android.os.Build;

import android.os.Bundle;

import android.widget.ImageView;

import android.widget.SeekBar;

import android.widget.SeekBar.OnSeekBarChangeListener;

public class SeekBarActivity extends Activity {
private SeekBar sb;
private ImageView iv;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_seek);
sb=(SeekBar) findViewById(R.id.bar);
iv=(ImageView) findViewById(R.id.image);
sb.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

}

@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
// 设置图片的透明度
iv.setImageAlpha(progress);
//seekBar.setProgress(progress);

}
});
}

}

效果所图所示