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android中实现指针滑动的动态效果方法

  • 时间:2022-03-21 15:53 编辑: 来源: 阅读:
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摘要:android中实现指针滑动的动态效果方法
[u]复制代码[/u] 代码如下:
<FrameLayout             android:layout_width="fill_parent"             android:layout_height="wrap_content"             android:background="#fff"             android:paddingBottom="5dp"             android:paddingLeft="5dp"             android:paddingRight="2dp"             >             <ImageView                 android:layout_width="wrap_content"                 android:layout_height="wrap_content"                 android:layout_gravity="right"                 android:src="@drawable/up_icon"                 android:layout_marginTop="0dp"                 android:paddingTop="0dp" />             <LinearLayout                 android:layout_width="240dip"                 android:layout_height="wrap_content"                 android:layout_marginLeft="5dp"                 android:layout_marginRight="7dp"                 android:orientation="horizontal" >                 <TextView                     android:layout_width="0dp"                     android:layout_height="wrap_content"                     android:layout_weight="1"                     android:gravity="left"                     android:text="优"                     android:textSize="12sp" />                 <TextView                     android:layout_width="0dp"                     android:layout_height="wrap_content"                     android:layout_weight="1"                     android:gravity="left"                     android:text="良"                     android:textSize="12sp" />                 <TextView                     android:layout_width="0dp"                     android:layout_height="wrap_content"                     android:layout_weight="1"                     android:gravity="left"                     android:text="中等"                     android:textSize="12sp" />                 <TextView                     android:layout_width="0dp"                     android:layout_height="wrap_content"                     android:layout_weight="1"                     android:gravity="left"                     android:text="不健康"                     android:textSize="12sp" />                 <TextView                     android:layout_width="0dp"                     android:layout_height="wrap_content"                     android:layout_weight="1"                     android:gravity="left"                     android:text="有毒害"                     android:textSize="12sp" />             </LinearLayout>                         <LinearLayout                 android:layout_width="240dip"                 android:layout_height="wrap_content"                 android:layout_marginLeft="5dp"                 android:layout_marginRight="7dp"                 android:layout_marginTop="40dp"                 android:orientation="horizontal" >                 <TextView                     android:layout_width="0dp"                     android:layout_height="wrap_content"                     android:layout_weight="1"                     android:gravity="center_horizontal"                     android:text="80"                     android:textSize="12sp" />                 <TextView                     android:layout_width="0dp"                     android:layout_height="wrap_content"                     android:layout_weight="1"                     android:gravity="center_horizontal"                     android:text="120"                     android:textSize="12sp" />                 <TextView                     android:layout_width="0dp"                     android:layout_height="wrap_content"                     android:layout_weight="1"                     android:gravity="center_horizontal"                     android:text="160"                     android:textSize="12sp" />                 <TextView                     android:layout_width="0dp"                     android:layout_height="wrap_content"                     android:layout_weight="1"                     android:gravity="center_horizontal"                     android:text="200"                     android:textSize="12sp" />                 <TextView                     android:layout_width="0dp"                     android:layout_height="wrap_content"                     android:layout_weight="1"                     android:gravity="center_horizontal"                     android:text="400"                     android:textSize="12sp" />             </LinearLayout>             <ImageView                 android:layout_width="wrap_content"                 android:layout_height="wrap_content"                 android:layout_marginLeft="10dp"                 android:layout_marginTop="10dp"                 android:src="@drawable/zhizhen"                 android:id="@+id/zhizhen"/>             <ImageView                 android:id="@+id/dengji_img"                 android:layout_width="250dip"                 android:layout_height="wrap_content"                 android:layout_marginTop="25dp"                 android:src="@drawable/dengji_icon" />         </FrameLayout>
上面这段代码实现的布局为 [img]http://files.jb51.net/file_images/article/201303/2013315102051808.jpg[/img] 首先,因为指针有压着下面的滚动条,因此这是一个framelayout的布局。其次,要实现指针的匀速滚动,需要开启一个线程,在线程中能够实现利用循环,以及线程的休眠,通过控制指针所在图标的padding属性来实现滚动的动画效果
[u]复制代码[/u] 代码如下:
Handler myHandler =new Handler(){         @Override         public void handleMessage(Message msg) {             // TODO Auto-generated method stub             super.handleMessage(msg);             //对于c的更改和循环应该是在线程中跑,要不run仅仅执行一次,                        zhizhen.setPadding(c, 0, 0, 0);         }             };     class MyThread extends Thread{         @Override         public void run() {             //发送一个消息,通知主线程改变UI          try {              while(c<=input){                  c=c+1;                  this.sleep(10);                  myHandler.sendEmptyMessage(0);                              }                         } catch (InterruptedException e) {             // TODO Auto-generated catch block             e.printStackTrace();         }
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