使用AsynTask进行Squre Image旋转的自定义进度对话框

Question

我创建了一个自定义加载进度对话框.而且运作良好.

我正在旋转12平方图像这里是其中之一

但是,当我想与AsynTask一起使用时,动画无效.

我的示例代码如下.

我开始加载的活动...动画和停止.

MainActivity.java

public class MainActivity extends Activity {
    AnimationDrawable loadingViewAnim;
    TextView loadigText;
    ImageView loadigIcon;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        loadigText = (TextView) findViewById(R.id.textView1);
        loadigText.setText("Loading...");
        loadigText.setVisibility(View.GONE);

        loadigIcon = (ImageView) findViewById(R.id.imageView1);
        loadigIcon.setVisibility(View.GONE);

        loadigIcon.setBackgroundResource(R.anim.progress_animation_white);
        loadingViewAnim = (AnimationDrawable) loadigIcon.getBackground();


    }

    //When User Touch on Screen The Loading... Animation Starts With Image Rotation

    //If I start below code in AsynTask's onPreExecute method it doesn't work
    public boolean onTouchEvent(MotionEvent event)
      {
        loadigText.setVisibility(View.VISIBLE);
        loadigIcon.setVisibility(View.VISIBLE);

          if (event.getAction() == MotionEvent.ACTION_DOWN)
          {
             loadingViewAnim.start();
             return true;
          }
         return super.onTouchEvent(event);
      }
}

使用简单文本和图像进行对话的XML布局.

activity_main.xml中

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/LinearLayout1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#000000"
    android:gravity="center"
    android:orientation="vertical" >

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/progress_sm_w01" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:text="Loading..."
        android:textColor="#ffffff"
        android:textSize="12sp" />

</LinearLayout>

动画列表有12个图像我旋转角度和时间持续时间

progress_animation_white.xml

<animation-list xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:drawable="@drawable/progress_sm_w01" android:duration="50" />
    <item android:drawable="@drawable/progress_sm_w02" android:duration="50" />
    <item android:drawable="@drawable/progress_sm_w03" android:duration="50" />
    <item android:drawable="@drawable/progress_sm_w04" android:duration="50" />
    <item android:drawable="@drawable/progress_sm_w05" android:duration="50" />
    <item android:drawable="@drawable/progress_sm_w06" android:duration="50" />
    <item android:drawable="@drawable/progress_sm_w07" android:duration="50" />
    <item android:drawable="@drawable/progress_sm_w08" android:duration="50" />
    <item android:drawable="@drawable/progress_sm_w09" android:duration="50" />
    <item android:drawable="@drawable/progress_sm_w10" android:duration="50" />
    <item android:drawable="@drawable/progress_sm_w11" android:duration="50" />
    <item android:drawable="@drawable/progress_sm_w12" android:duration="50" />

    </animation-list>

这是结果载入画面..

我的问题是无论如何 使用AsynTask 实现相同的加载动画.

您的小帮助将不胜感激.

Answer 1

非常感谢@Brontok和@URAndroid的帮助.我解决了我的问题.所以让我回答我自己的问题,Hoe我实现了自定义加载动画

我添加了几张Image for Image Rotation Animation

第1步 -在res/drawable文件夹中

1. progress_sm_w00.png(默认空白透明图片)
2. progress_sm_w01.png(第一个动画位置)
3. progress_sm_w02.png
4. progress_sm_w03.png
5. progress_sm_w04.png
6. progress_sm_w05.png
7. progress_sm_w06.png
8. progress_sm_w07.png
9. progress_sm_w08.png
10. progress_sm_w09.png
11. progress_sm_w10.png
12. progress_sm_w11.png
13. progress_sm_w12.png(上一个动画位置).

示例:其中一个是我添加的

第2步 -在res/anim文件夹中创建动画文件名"loading_animation.xml"

<item android:drawable="@drawable/progress_sm_w01" android:duration="50" />
<item android:drawable="@drawable/progress_sm_w02" android:duration="50" />
<item android:drawable="@drawable/progress_sm_w03" android:duration="50" />
<item android:drawable="@drawable/progress_sm_w04" android:duration="50" />
<item android:drawable="@drawable/progress_sm_w05" android:duration="50" />
<item android:drawable="@drawable/progress_sm_w06" android:duration="50" />
<item android:drawable="@drawable/progress_sm_w07" android:duration="50" />
<item android:drawable="@drawable/progress_sm_w08" android:duration="50" />
<item android:drawable="@drawable/progress_sm_w09" android:duration="50" />
<item android:drawable="@drawable/progress_sm_w10" android:duration="50" />
<item android:drawable="@drawable/progress_sm_w11" android:duration="50" />
<item android:drawable="@drawable/progress_sm_w12" android:duration="50" />

</animation-list>

第3步 -现在在我的屏幕(活动)中创建自定义加载视图布局,无论我需要显示加载

例.我的Facebook登录屏幕的XML布局

<LinearLayout
         android:id="@+id/LinearLayout1"
         android:layout_width="fill_parent"
         android:layout_height="fill_parent"
         android:background="#0D000000"
         android:gravity="center"
         android:orientation="vertical"
         android:visibility="gone" >

    <ImageView
    android:id="@+id/imageView111"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/progress_sm_w00"
    android:visibility="gone" />

    <TextView
    android:id="@+id/textView111"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginTop="10dp"
    android:text="Searching..."
    android:textColor="#ffffff"
    android:textSize="12sp"
    android:visibility="gone" />

</LinearLayout>

第4步 -在java代码(Activity)中我创建了Loading视图,在完成OnCreate方法后,我启动了Asyn Task,这样我的动画就可以正常工作了.

public class ResultActivity extends Activity {

      private static final String TAG = "ResultActivity";
      private AnimationDrawable loadingViewAnim=null;
      private TextView loadigText = null;
      private ImageView loadigIcon = null;
      private LinearLayout loadingLayout = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_result);

        loadingLayout = (LinearLayout)findViewById(R.id.LinearLayout1);
        loadingLayout.setVisibility(View.GONE);

        loadigText = (TextView) findViewById(R.id.textView111);
        loadigText.setVisibility(View.GONE);

        loadigIcon = (ImageView) findViewById(R.id.imageView111);
        loadigIcon.setVisibility(View.GONE);

        loadigIcon.setBackgroundResource(R.anim.loading_animation);
        loadingViewAnim = (AnimationDrawable) loadigIcon.getBackground();

        // This line is to start Asyn Task only when OnCreate Method get completed, So Loading Icon Rotation Animation work properly
        loadigIcon.post(new Starter());

    }

    class Starter implements Runnable {
          public void run() {
            //start Asyn Task here   
            new LongOperation().execute("");
          }
      }

    private class LongOperation extends AsyncTask<String, Void, String> {

        @Override
        protected String doInBackground(String... params) {
            //ToDo your Network Job/Request etc. here 
            return "Executed";
        }

        @Override
        protected void onPostExecute(String result) {
        //ToDo with result you got from Task

        //Stop Loading Animation
            loadingLayout.setVisibility(View.GONE);
        loadigText.setVisibility(View.GONE);
        loadigIcon.setVisibility(View.GONE);
        loadingViewAnim.stop();
        }

        @Override
        protected void onPreExecute() {
        //Start  Loading Animation
        loadingLayout.setVisibility(View.VISIBLE);
        loadigText.setVisibility(View.VISIBLE);
        loadigIcon.setVisibility(View.VISIBLE);
        loadingViewAnim.start();
        }

        @Override
        protected void onProgressUpdate(Void... values) {}
    }
}

第5步 -这是带有进度加载动画的结果屏幕.

希望这会帮助你.干杯!!