android中实现指针滑动的动态效果方法

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

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

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();
        }