CODEWITHSUNDEEP
androidbitmapandroid-framelayout
Mickey Tin
Mickey Tin

Reputation: 3533

android Convert FrameLayout to Drawable

I have this FrameLayout in my LinearLayout :

<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/desktopsFramelayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:contentDescription="none"
        android:src="@drawable/accept" />

</FrameLayout>

then in code I try convert it in Drawable like this :

FrameLayout desktopFrameLayout = (FrameLayout)findViewById(R.id.desktopsFramelayout);

        desktopFrameLayout.setDrawingCacheEnabled(true);
        desktopFrameLayout.buildDrawingCache();     
        Bitmap bitmap = desktopFrameLayout.getDrawingCache();

the bitmap is null ,why ???

Upvotes: 1

Views: 2381

Answers (3)

Niko
Niko

Reputation: 8153

Bitmap b = null;
desktopFrameLayout.post(new Runnable() {
    desktopFrameLayout.setDrawingCacheEnabled(true);
    desktopFrameLayout.buildDrawingCache();     
    b = desktopFrameLayout.getDrawingCache();
});

Upvotes: 0

Barney
Barney

Reputation: 2373

Check out this link and read nininho's answer: Android View.getDrawingCache returns null, only null

I think this it returns null because your view has dimensions (0,0)

Upvotes: 1

Ostkontentitan
Ostkontentitan

Reputation: 7010

Probably because you just enabled DrawingCache but the FrameLayout didnt had any time to build it yet.

try to assign the drawingCacheEnabled in xml and call desktopFrameLayout.getDrawingCache();

Afterwards it might have the Cache build when you ask for it.

If not try it later in the lifecycle.

Upvotes: 0

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