本节引言:
1.SeekBar基本用法
好吧,基本用法其实很简单,常用的属性无非就下面这几个常用的属性,Java代码里只要setXxx即可:
接着要说下SeekBar的事件了,SeekBar.OnSeekBarChangeListener 我们只需重写三个对应的方法:
简单的代码示例:
效果图:
实现代码:
public class MainActivity extends AppCompatActivity { private SeekBar sb_normal; private TextView txt_cur; private Context mContext; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mContext = MainActivity.this; bindViews(); } private void bindViews() { sb_normal = (SeekBar) findViewById(R.id.sb_normal); txt_cur = (TextView) findViewById(R.id.txt_cur); sb_normal.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() { @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { txt_cur.setText("当前进度值:" + progress + " / 100 "); } @Override public void onStartTrackingTouch(SeekBar seekBar) { Toast.makeText(mContext, "触碰SeekBar", Toast.LENGTH_SHORT).show(); } @Override public void onStopTrackingTouch(SeekBar seekBar) { Toast.makeText(mContext, "放开SeekBar", Toast.LENGTH_SHORT).show(); } }); } }
2.简单SeekBar定制:
代码实例:
运行效果图:
代码实现: 1.滑块状态Drawable:sb_thumb.xml
<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_pressed="true" android:drawable="@mipmap/seekbar_thumb_pressed"/> <item android:state_pressed="false" android:drawable="@mipmap/seekbar_thumb_normal"/> </selector>
贴下素材:
2.条形栏Bar的Drawable:sb_bar.xml
这里用到一个layer-list的drawable资源!其实就是层叠图片,依次是:背景,二级进度条,当前进度:
<?xml version="1.0" encoding="utf-8"?> <layer-list xmlns:android="http://schemas.android.com/apk/res/android"> <item android:id="@android:id/background"> <shape> <solid android:color="#FFFFD042" /> </shape> </item> <item android:id="@android:id/secondaryProgress"> <clip> <shape> <solid android:color="#FFFFFFFF" /> </shape> </clip> </item> <item android:id="@android:id/progress"> <clip> <shape> <solid android:color="#FF96E85D" /> </shape> </clip> </item> </layer-list>
3.然后布局引入SeekBar后,设置下progressDrawable与thumb即可!
<SeekBar android:id="@+id/sb_normal" android:layout_width="match_parent" android:layout_height="wrap_content" android:maxHeight="5.0dp" android:minHeight="5.0dp" android:progressDrawable="@drawable/sb_bar" android:thumb="@drawable/sb_thumb"/>
就是这么简单!
本节小结:
好的,关于SeekBar就到这里,谢谢大家~