How to convert Views to bitmaps?

I have two Views (Textview & ImageView) in the FrameLayout, I want to save the image with text. For this, I covert the View to a bitmap.

My xml is:

<FrameLayout 
     android:id="@+id/framelayout"
     android:layout_marginTop="30dip"
     android:layout_height="fill_parent" 
     android:layout_width="fill_parent">

     <ImageView 
          android:id="@+id/ImageView01"
          android:layout_height="wrap_content" 
          android:layout_width="wrap_content"/>

    <TextView android:id="@+id/text_view"
          android:layout_marginTop="30dip"
          android:layout_width="wrap_content" 
          android:maxLines="20"
          android:scrollbars="vert开发者_开发百科ical"
          android:layout_height="wrap_content"/>

</FrameLayout>

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How to convert View into Bitmap

FrameLayout view = (FrameLayout)findViewById(R.id.framelayout);

view.setDrawingCacheEnabled(true);

view.buildDrawingCache();

Bitmap bm = view.getDrawingCache();

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I used to use the buildDrawingCache() method to get a bitmap of my layout, but I was having trouble with it when the view was large. Now I use the following method:

FrameLayout view = findViewById(R.id.framelayout);
Bitmap bitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
view.draw(canvas);

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Hi you can get a bitmap of a view using the following snippet

mView.setDrawingCacheEnabled(true);
mView.getDrawingCache();

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why don't you write your class that extends ImageView and override method onDraw and put there your image and text, it's more easy

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First Of all, you need to add dependency

implementation 'com.github.vipulasri.layouttoimage:library:1.0.0'

Then Convert Layout to Bitmap

RelativeLayout pdfmain;
Layout_to_Image layout_to_image;
Bitmap mBitmap;



    layout_to_image = new Layout_to_Image(AllotmentDoc.this, pdfmain);
    mBitmap = layout_to_image.convert_layout();

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    FrameLayout v = (FrameLayout)findViewById(R.id.frme1);

    v.setDrawingCacheEnabled(true);

    // this is the important code :)
  // Without it the view will have a dimension of 0,0 and the bitmap will be null
    v.measure(View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED),
            View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
    v.layout(0, 0, v.getMeasuredWidth(), v.getMeasuredHeight());

    v.buildDrawingCache(true);

    v.post(new Runnable() {
        @Override
        public void run() {
           // Bitmap b = v.getDrawingCache();
            Bitmap b = Bitmap.createBitmap(v.getDrawingCache());
            v.setDrawingCacheEnabled(false); // clear drawing cache
            Log.e("ss","ss"+b.getHeight());
        }
    });

Here I have added a post Runnable thread which ensure the createBitmap method will execute only after v.buildDrawingCache(true);. v.buildDrawingCache(true); takes few milisec time in some mobile and that is the reason it crash in some mobile. Please try this solution if you face null pointer exception for Bitmap object.