1、简介
SeekBar继承ProgressBar，相关属性和三种不同状态下的触发方法：
<!--<SeekBar-->
<!--android:layout_width="match_parent"-->
<!--android:layout_height="wrap_content"-->
<!--android:max="100"-->
<!--android:progress="30"-->
<!--android:id="@+id/seekbar"-->
<!--android:thumb="@mipmap/ic_launcher_round"/>-->//设置滑块的
seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override//进度发生改变
public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
}
@Override//按下
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override//放开
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
2、简单使用
这是一个简单自定义的SeekBar，浅绿色是进度条颜色，红色是二级进度条颜色，黄色是背景色！
滑块的selector文件：
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true"
android:drawable="@drawable/seekbar_thumb_pressed" /> <item android:state_pressed="false"
android:drawable="@drawable/seekbar_thumb_normal"/>
</selector>
进度条颜色layer-list文件：layer-list创建的图形列表，也就是一个drawable 图形。
<?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="#f23f21" />
</shape>
</clip>
</item>
<item android:id="@android:id/progress">
<clip>
<shape>
<solid android:color="#FF96E85D" />
</shape>
</clip>
</item> </layer-list>
整体xml布局文件：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".LoginActivity"> <TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="当前进度值：30"
android:id="@+id/textview"/>
<SeekBar
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/seekbar"
android:progress="30"
android:secondaryProgress="50"
android:maxHeight="5dp"
android:minHeight="5dp"
android:progressDrawable="@drawable/sb_bar"
android:thumb="@drawable/sb_thumb"/> </LinearLayout>
Java文件三种状态事件的触发：
public class LoginActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
// Set up the login form.
SeekBar seekBar = (SeekBar)findViewById(R.id.seekbar);
final TextView textView = (TextView)findViewById(R.id.textview);
seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override//进度发生改变
public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
textView.setText("当前进度值："+i);
}
@Override//按下
public void onStartTrackingTouch(SeekBar seekBar) {
Toast.makeText(LoginActivity.this,"按下",Toast.LENGTH_SHORT).show();
}
@Override//放开
public void onStopTrackingTouch(SeekBar seekBar) {
Toast.makeText(LoginActivity.this,"放开",Toast.LENGTH_SHORT).show();
}
});
}
}