初识SeekBar

SeekBar拖动条，是Progress的间接子类

1 <SeekBar2             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             @Override15             public void onStartTrackingTouch(SeekBar seekBar) {16                 // TODO Auto-generated method stub17                 Log.i(TAG, "onStartTrackingTouch");18 19             }20 21             @Override22             public void onProgressChanged(SeekBar seekBar, int progress,23                     boolean fromUser) {24                 // TODO Auto-generated method stub25                 Log.i(TAG, "onProgressChanged");26 27             }28         });29     }

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