如何在画布上记录用户的操作，并保存在android的视频文件？

问题描述

我已经实现绘图功能。我想记录用户的操作，并保存为一个视频文件。在IPAD就像一个应用程序让我看看。我该怎么办呢？

I have implemented painting function.I want to record user's operation and save as a video file.Just like an application "SHOW ME" in IPAD.How can I do that?

推荐答案

您可以（根据您的应用程序一点点修改）需要使用下面的code自己的应用程序截图：

You can take screenshot of your own app using following code(with a little modification according to your app):

public class AndroidWebImage extends Activity {

ImageView bmImage; 
LinearLayout view;
  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.main);

      view = (LinearLayout)findViewById(R.id.screen);
      bmImage = (ImageView)findViewById(R.id.image);

      view.setDrawingCacheEnabled(true);
      // this is the important code :)  
      // Without it the view will have a dimension of 0,0 and the bitmap will be null          

      view.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), 
            MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));

      view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight()); 

      view.buildDrawingCache(true);
      Bitmap b = Bitmap.createBitmap(view.getDrawingCache());
      view.setDrawingCacheEnabled(false); // clear drawing cache

      bmImage.setImageBitmap(b);   

};


}

---

我用下面的XML：

---

I used the following xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
   android:id="@+id/screen"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  >
<TextView
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:text="@string/hello"
  />
<ImageView
  android:id="@+id/image"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
/>
</LinearLayout>

---

取在使用定时器固定的时间间隔截图，然后转换这一系列的图像，如视频文件：create-a-video-file-from-images-using-ffmpeg

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