越来越发现这些控件用法大同小异了,这里注意几个函数:seekBar.setSecondaryProgress(0);设置初始进度为0,总共为0~99,对其监听用setOnSeekBarChangeListener。
1 public class MainActivity extends Activity { 2 private SeekBar seekBar; 3 private TextView tv; 4 5 @Override 6 public void onCreate(Bundle savedInstanceState) { 7 super.onCreate(savedInstanceState); 8 setContentView(R.layout.main); 9 seekBar = (SeekBar) findViewById(R.id.seekbar); 10 tv = (TextView) findViewById(R.id.tv); 11 seekBar.setSecondaryProgress(0); 12 seekBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() { 13 //当用户对拖动条的拖动的动作完成时触发 14 @Override 15 public void onStopTrackingTouch(SeekBar seekBar) { 16 tv.setText("<拖动条>完成拖动"); 17 } 18 //当用户对拖动条进行拖动时触发 19 @Override 20 public void onStartTrackingTouch(SeekBar seekBar) { 21 tv.setText("<拖动条>拖动中..."); 22 } 23 //当拖动条的值发生改变的时触发 24 @Override 25 public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { 26 tv.setText("当前<拖动条>的值为:"+progress); 27 } 28 }); 29 } 30 }
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时间: 2024-10-03 18:14:16