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     }