14

I have two main issues which are closely linked. I am looking at these problems from a programmatic point of view.

(1) - I wish to take a screenshot of the contents of a SPECIFIC layout, i.e. a ScrollView nested in a LinearLayout.

(2) - As the ScrollView has content that spills out of the screen (hence scrolling made possible), how can I ensure that the screenshot includes the elements that are not visible on the screen?

This is the current block of code I use. It does the job of taking a screenshot but only for the entire screen. This is even though R.id.boss is the ID of the ScrollView and not the main LinearLayout.

View view = findViewById(R.id.boss);
View v = view.getRootView();// this does not seem to make a difference
v.setDrawingCacheEnabled(true);                                                
v.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), 
MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
v.layout(0, 0, v.getMeasuredWidth(), v.getMeasuredHeight());    
v.buildDrawingCache(true);
Bitmap b = Bitmap.createBitmap(u.getDrawingCache());             
v.setDrawingCacheEnabled(false);

Thanks in advance.

EDIT:

I've made a few mistakes. I used R.id.boss which is the wrong resource. I am now able to take a screenshot of the scrollview alone, less the out-of-screen parts.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/boss"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_gravity="top"
android:orientation="vertical" >

    <TextView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="F"
    android:textAppearance="?android:attr/textAppearanceMedium" />

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Analyze via image URL"
        android:textAppearance="?android:attr/textAppearanceSmall" />

        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
             >

                        <EditText
                            android:id="@+id/mUrl"
                            android:layout_width="fill_parent"
                            android:layout_height="wrap_content"
                            android:layout_weight="0.7"
                            android:text="http://" >

                            <requestFocus />
                        </EditText>

                        <ImageView
                            android:id="@+id/call"
                            android:layout_width="75dp"
                            android:layout_height="50dp"
                            android:layout_weight="0.3"
                            android:text="ABC"
                            android:src="@drawable/run" />

        </LinearLayout>

     <TextView
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:text="ABC"
         android:textAppearance="?android:attr/textAppearanceSmall" />

     <LinearLayout
         android:layout_width="fill_parent"
         android:layout_height="wrap_content" >

         <EditText
             android:id="@+id/filepath"
             android:layout_width="fill_parent"
             android:layout_height="wrap_content"
             android:layout_weight="0.55" />

         <ImageView
             android:id="@+id/cam"
             android:layout_width="75dp"
             android:layout_height="50dp"
             android:layout_weight="0.15"
             android:src="@drawable/cam" />

         <ImageView
             android:id="@+id/browse"
             android:layout_width="75dp"
             android:layout_height="50dp"
             android:layout_weight="0.15"
             android:src="@drawable/folder"
             android:text="B" />

         <ImageView
             android:id="@+id/upload"
             android:layout_width="75dp"
             android:layout_height="50dp"
             android:layout_weight="0.15"
             android:src="@drawable/run"
             android:text="A" />
     </LinearLayout>


     <LinearLayout
         android:id="@+id/baba"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:orientation="vertical" >


         <ScrollView
             android:id="@+id/scroll"
             android:layout_width="fill_parent"
             android:layout_height="150dp"
             android:layout_weight="0.7" >

             <LinearLayout
                 android:layout_width="fill_parent"
                 android:layout_height="186dp"
                 android:orientation="vertical" >

                 <ImageView
                     android:id="@+id/pic"
                     android:layout_width="fill_parent"
                     android:layout_height="fill_parent"
                     android:layout_weight="1" />

                 <TextView
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1"
                     android:text="Facial recognition"
                     android:textAppearance="?android:attr/textAppearanceMedium" />

                 <TextView
                     android:id="@+id/text3"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1"
                     android:text="Small Text"
                     android:textAppearance="?android:attr/textAppearanceSmall" />

                 <TextView
                     android:id="@+id/avmarwe"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1"
                     android:text="Gender and age"
                     android:textAppearance="?android:attr/textAppearanceMedium" />

                 <TextView
                     android:id="@+id/text1"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1"
                     android:text="Small Text"
                     android:textAppearance="?android:attr/textAppearanceSmall" />

                 <TextView
                     android:id="@+id/skahasd"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1"
                     android:text="Expression and mood"
                     android:textAppearance="?android:attr/textAppearanceMedium" />

                 <TextView
                     android:id="@+id/text2"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1"
                     android:text="Small Text"
                     android:textAppearance="?android:attr/textAppearanceSmall" />

                 <TextView
                     android:id="@+id/dsfsfs"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1"
                     android:text="Celebrity Facial Match"
                     android:textAppearance="?android:attr/textAppearanceMedium" />

                 <TextView
                     android:id="@+id/text4"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_weight="1"
                     android:text="Small Text"
                     android:textAppearance="?android:attr/textAppearanceSmall" />
             </LinearLayout>
         </ScrollView>

     </LinearLayout>


    <LinearLayout
        android:id="@+id/linearLayout1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom" >

        <Button
            android:id="@+id/c"
            android:layout_width="fill_parent"
            android:layout_height="50dp"
            android:layout_weight="0.7"
            android:text="" />

        <Button
            android:id="@+id/share"
            android:layout_width="70dp"
            android:layout_height="50dp"
            android:layout_weight="0.3"
            android:text="" />

    </LinearLayout>

</LinearLayout>
4

6 回答 6

20

多亏了各位，我终于知道出了什么问题了。

View v = view.getRootView();不应该使用，因为它会调用我不想要的根视图。我错误地认为这没有什么区别，因为我输入了错误的资源 ID。

MeasureSpec不知何故没有很好地说明宽度和高度。所以我最终使用了另一种方法：

...
ScrollView z = (ScrollView) findViewById(R.id.scroll);
int totalHeight = z.getChildAt(0).getHeight();
int totalWidth = z.getChildAt(0).getWidth();
u.layout(0, 0, totalWidth, totalHeight);
...

由于 ScrollView 的总高度可以由它拥有的单个子元素确定。

进行这些更改后，我现在可以截取嵌套的 ScrollView 及其所有内容（可见与否）的屏幕截图。对于任何感兴趣的人，这里是包含位图保存的代码块：

            View u = findViewById(R.id.scroll);
            u.setDrawingCacheEnabled(true);                                                
            ScrollView z = (ScrollView) findViewById(R.id.scroll);
            int totalHeight = z.getChildAt(0).getHeight();
            int totalWidth = z.getChildAt(0).getWidth();
            u.layout(0, 0, totalWidth, totalHeight);    
            u.buildDrawingCache(true);
            Bitmap b = Bitmap.createBitmap(u.getDrawingCache());             
            u.setDrawingCacheEnabled(false);

            //Save bitmap
            String extr = Environment.getExternalStorageDirectory().toString() +   File.separator + "Folder";
            String fileName = new SimpleDateFormat("yyyyMMddhhmm'_report.jpg'").format(new Date());
            File myPath = new File(extr, fileName);
            FileOutputStream fos = null;
            try {
                fos = new FileOutputStream(myPath);
                b.compress(Bitmap.CompressFormat.JPEG, 100, fos);
                fos.flush();
                fos.close();
                MediaStore.Images.Media.insertImage(getContentResolver(), b, "Screen", "screen");
            }catch (FileNotFoundException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
于 2012-05-18T10:59:15.397 回答
3

试试这个对我来说很好

TableLayout tabLayout = (TableLayout) findViewById(R.id.allview);
if (tabLayout != null) {
    Bitmap image = Bitmap.createBitmap(tabLayout.getWidth(),
            tabLayout.getHeight(), Config.ARGB_8888);
    Canvas b = new Canvas(image);
    tabLayout.draw(b);
}
于 2014-06-18T07:14:39.937 回答
2

编辑：看到OP的评论后

您根本不需要考虑新的活动..假设您现在在活动中..布局A是活动的主要布局，布局B和C是布局A内的两个子布局。像这样，

 Layout A -> Parent
 |
  -------Layout B
 |
  -------Layout C

现在，如果您只想截取 C 的屏幕截图

1) 在活动的 onCreate()

 LinearLayout myCLayout = (LinearLayout)this.findViewbyId(R.id.my_c_layout);
 ViewTreeObserver vto   =  myCLayout.getViewTreeObserver();
 vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
   @Override
   public void onGlobalLayout() {
      //fully drawn, no need of listener anymore
      myCLayout.getViewTreeObserver().removeGlobalOnLayoutListener(this);
      getDrawingBitmap();
   }
 });

其中 getDrawingBitmap() 是一个函数..截取您的屏幕截图..

public void getDrawingBitmap(){
    LinearLayout myCLayout = (LinearLayout)this.findViewbyId(R.id.my_c_layout);
    Bitmap b = myCLayout.getDrawingCache();

    File file = saveBitmapAsFile(b);
}

编辑：对于滚动视图

我从未尝试过..但我认为你可以做到这一点..

1）首先覆盖scrollView，并覆盖onMeasure函数..

public class MyScrollView extends ScrollView{
    public MyScrollView(Context context, AttributeSet attrs) {
         super(context, attrs);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec){
        super.onMeasure(widthMeasureSpec, yourFullScrollViewHeight));
    }
}

并在您的布局中使用 MyScrollView .. 这里 yourFullScrollViewHeight 是您需要截取屏幕截图的所有滚动视图内容的高度.. 我从未尝试过.. 但它可能会工作..

于 2012-05-18T09:42:23.260 回答
2

这是您想要的确切解决方案，它将显示整个屏幕，包括隐藏在您的ScrollView 

LayoutInflater inflater = (LayoutInflater) this.getSystemService(LAYOUT_INFLATER_SERVICE);
FrameLayout root = (FrameLayout) inflater.inflate(R.layout.activity_main, null); // activity_main is UI(xml) file we used in our Activity class. FrameLayout is root view of my UI(xml) file.
root.setDrawingCacheEnabled(true);
Bitmap bitmap = getBitmapFromView(this.getWindow().findViewById(R.id.frameLayout)); // here give id of our root layout (here its my FrameLayout's id)

显示bitmap在您的ImageView或根据需要使用它。
享受..

于 2013-05-23T05:21:44.733 回答
0

我也遇到了这个问题，自己编码。

我使用此代码截取整个布局的屏幕截图。

我确实修改了列表大小和一些数学项目。

请参阅以下网站，

于 2012-10-15T05:01:05.370 回答
-1

试试这个代码

公共位图屏幕截图（查看视图）{

    Bitmap bitmap = Bitmap.createBitmap(view.getWidth(),
    view.getHeight(), Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(bitmap);
    view.draw(canvas);
    return bitmap;
}
于 2015-05-25T03:42:50.460 回答