截取屏幕截图后，布局变了

Question

I created screen shot activity in programatically in android.using scroll view the after taking screen shot the layout are stretched. I will give the images for before taking after taking screen shot.this will help you to understand my problem.i don't know how to tell?

before taking screen shot the layout ,

after taking screen shot the layout

you know the difference of two images.the activity after taking screen shot it extended i don't know why it happen? how to solve this?

My code :

public class MainActivity extends AppCompatActivity {

    File cacheDir;
    final Context context = this;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Button print = (Button) findViewById(R.id.btn_print);

        print.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                takeScreenShot();
            }
        });



    }

       private void takeScreenShot() {

        View u =  findViewById(R.id.activity_main);

        int spec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
        u.measure(spec, spec);
        u.layout(0, 0, u.getMeasuredWidth(), u.getMeasuredHeight());

        Bitmap b = getBitmapFromView(u,u.getMeasuredHeight(),u.getMeasuredWidth());

        final String root = Environment.getExternalStorageDirectory().toString();

        File myPath = new File(root + "/saved_img");
        myPath.mkdirs();
        Random generator = new Random();
        int n = 10000;
        n = generator.nextInt(n);
        String fname = "Image-"+n+".jpg";
        File file = new File(myPath, fname);
        FileOutputStream fos = null;
        if(file.exists()) file.delete();
        try{
            fos = new FileOutputStream(file);
            b.compress(Bitmap.CompressFormat.JPEG, 100, fos);
            fos.flush();
            fos.close();


        } catch(FileNotFoundException e){
            e.printStackTrace();
        } catch (Exception e){
            e.printStackTrace();
        }

        Toast.makeText(this,"screen captured",Toast.LENGTH_SHORT).show();
    }



    public Bitmap getBitmapFromView(View u, int totalHeight, int totalWidth){
        Bitmap returnedBitmap = Bitmap.createBitmap(totalWidth,totalHeight , Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(returnedBitmap);

        Drawable bgDrawable = u.getBackground();
        if (bgDrawable != null)
            bgDrawable.draw(canvas);
        else
            canvas.drawColor(Color.WHITE);
        u.draw(canvas);
        return returnedBitmap;
    }
}

xml :

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.own.scrollviewimg.MainActivity"

    >


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        >

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="print"
        android:id="@+id/btn_print"
        />


    <ScrollView
        android:id="@+id/horizontalscroll"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            >


            <ImageView
                android:layout_width="500dp"
                android:layout_height="200dp"
                android:src="@mipmap/ic_launcher"
                />

              <TextView
                  android:layout_width="wrap_content"
                  android:layout_height="wrap_content"
                  android:text="@string/testdata"
                  android:textSize="25sp"
                  android:textStyle="bold"
                  />


              </LinearLayout>

          </ScrollView>


        </LinearLayout>

</RelativeLayout>

Answer 1

try this code

private void takeScreenShot() {
    Date now = new Date();
    android.text.format.DateFormat.format("yyyy-MM-dd_hh:mm:ss", now);

    try {
        String mPath = Environment.getExternalStorageDirectory().toString() + "/" + now + ".jpg";

        View v1 = getWindow().getDecorView().getRootView();
        v1.setDrawingCacheEnabled(true);
        Bitmap bitmap = Bitmap.createBitmap(v1.getDrawingCache());
        v1.setDrawingCacheEnabled(false);

        File imageFile = new File(mPath);

        FileOutputStream outputStream = new FileOutputStream(imageFile);
        int quality = 100;
        bitmap.compress(Bitmap.CompressFormat.JPEG, quality, outputStream);
        outputStream.flush();
        outputStream.close();

    } catch (Throwable e) {
        e.printStackTrace();
    }
}

Answer 2

In your takeScreenShot() block, why are you using View.MeasureSpec
You can use view.getMeasuredHeight() and view.getMeasuredWidth() to the the height and width from the root view itself and also try to get the view from already inflated root by

View view = getWindow().getDecorView().getRootView();

So just comment out

 /* int spec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
    u.measure(spec, spec);
    u.layout(0, 0, u.getMeasuredWidth(), u.getMeasuredHeight()); */

and the rest is fine

Note: the width of your ImageView may be more than the current screen size

Answer 3

finally i found the answer.it's simple.i just recall the layout on after button click.

my solved answer :

print.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                takeScreenShot();
                setContentView(R.layout.activity_main);
            }
        });