android开发实现指针滑动的动态效果

释放双眼,带上耳机,听听看~!

今天这篇文章是android中实现指针滑动的动态效果,它是打开线程并控制指针所在的ImageView控件的padding属性,下面就跟着技术狗小编的步伐来学习吧!

<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="https://js.aizhan.com/develop/android/@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="https://js.aizhan.com/develop/android/@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="https://js.aizhan.com/develop/android/@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

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();
        }

 

以上就是关于android中实现指针滑动的动态效果,相信认真看完的朋友都已经懂了,看了小编的介绍之后赶快收藏起来吧!

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