初识SeekBar

SeekBar拖动条，是Progress的间接子类

1 <SeekBar
2             android:id="@+id/seekBar1"
3             android:layout_width="match_parent"
4             android:layout_height="wrap_content"
5             android:progress="30"
6             //Draws the thumb on a seekbar. 
7             android:thumb="@drawable/peasy" />

SeekBar事件，被拉动时，onProgressChanged会一直被触发





 1 public void showSeekBar() {
 2         seekBar = (SeekBar) findViewById(R.id.seekBar1);
 3         seekBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
 4 
 5             @Override
 6             public void onStopTrackingTouch(SeekBar seekBar) {
 7                 // TODO Auto-generated method stub
 8                 Log.i(TAG, "onStopTrackingTouch");
 9                 Toast.makeText(FormActivity.this,
10                         "current level is " + seekBar.getProgress(), 3000)
11                         .show();
12             }
13 
14             @Override
15             public void onStartTrackingTouch(SeekBar seekBar) {
16                 // TODO Auto-generated method stub
17                 Log.i(TAG, "onStartTrackingTouch");
18 
19             }
20 
21             @Override
22             public void onProgressChanged(SeekBar seekBar, int progress,
23                     boolean fromUser) {
24                 // TODO Auto-generated method stub
25                 Log.i(TAG, "onProgressChanged");
26 
27             }
28         });
29     }




 






		

		
posted @ 
2014-12-26 02:16 
iRac 
阅读(173) 
评论(0) 
编辑 
收藏 
举报