Android: Map the contents of the view into a bitmap-image export

Some time ago on the internet to see this example is to map the view to a bitmap, a little improvement can be used in some tools or software (QQ, etc.), the example is not well-written, but some of the meaning of learning is as follows:

In Android, you get the cache content in the view, and then convert the content to bitmap, the method name is: Getdrawingcache (), and the result is bitmap, but when you first use it, the result is null. So in a forum to find the right way to use. The code is as follows:

Contentlayout.setdrawingcacheenabled (TRUE);

Contentlayout.measure (

Measurespec.makemeasurespec (0, measurespec.unspecified),

Measurespec.makemeasurespec (0, measurespec.unspecified));

Contentlayout.layout (0, 0, contentlayout.getmeasuredwidth (),

Contentlayout.getmeasuredheight ());

Contentlayout.builddrawingcache ();

Bitmap bitmap= Contentlayout.getdrawingcache ();

When used, call the

Bitmap Bitmap = View.getdrawingcache ();

You can get the bitmap of the picture.

To test this functionality, the author uses two ways to create the contents of the Linerlayout, one is to add the contents of the view in the XML file, just add the image in the corresponding ImageView in the code. The other is to dynamically add a view in the Linerlayout.

Setview's Code:

public void OnCreate (Bundle savedinstancestate) {

Super.oncreate (savedinstancestate);

Setcontentview (R.layout.set_view);

Contentlayout = (linearlayout) Findviewbyid (r.id.content);

ImgSource1 = (ImageView) Findviewbyid (R.id.imgsource1);

ImgSource2 = (ImageView) Findviewbyid (R.ID.IMGSOURCE2);

Imgcache = (ImageView) Findviewbyid (R.id.imgcache);

Imgsource1.setimageresource (R.drawable.source1);

Imgsource2.setimageresource (R.DRAWABLE.SOURCE2);

Contentlayout.setdrawingcacheenabled (TRUE);

Contentlayout.measure (

Measurespec.makemeasurespec (0, measurespec.unspecified),

Measurespec.makemeasurespec (0, measurespec.unspecified));

Contentlayout.layout (0, 0, contentlayout.getmeasuredwidth (),

Contentlayout.getmeasuredheight ());

Contentlayout.builddrawingcache ();

Bitmap bitmap= Contentlayout.getdrawingcache ();

if (bitmap!=null) {

Imgcache.setimagebitmap (bitmap);

}else{

LOG.I ("Cache_bitmap", "drawingcache=null");

}

}

The second method code:

private void Addrelativelayout () {

TODO auto-generated Method Stub

Relativelayout.layoutparams layoutpare = new Relativelayout.layoutparams (

Layoutparams.fill_parent, layoutparams.wrap_content);

Relativelayout relativelayout = new Relativelayout (this);

Relativelayout.setlayoutparams (Layoutpare);

ImageView imgView1 = new ImageView (this);

ImageView imgView2 = new ImageView (this);

Imgview1.setimageresource (R.drawable.source1);

Imgview2.setimageresource (R.DRAWABLE.SOURCE2);

Relativelayout.layoutparams img1 = new Relativelayout.layoutparams (38,

38);

Img1.addrule (Relativelayout.align_parent_left, relativelayout.true);

Relativelayout.layoutparams img2 = new Relativelayout.layoutparams (38,

38);

Img2.addrule (Relativelayout.align_parent_right, relativelayout.true);

Relativelayout.addview (ImgView1, IMG1);

Relativelayout.addview (ImgView2, IMG2);

Addviewcontent.addview (relativelayout);

}

/**

* Add a picture source

*/

private void Addimgsource () {

ImageView imgView1 = new ImageView (this);

ImageView imgView2 = new ImageView (this);

Imgview1.setimageresource (R.drawable.source1);

Imgview2.setimageresource (R.DRAWABLE.SOURCE2);

Addviewcontent.addview (ImgView1, New Layoutparams (

LinearLayout.LayoutParams.WRAP_CONTENT,

LinearLayout.LayoutParams.WRAP_CONTENT));

Addviewcontent.addview (ImgView2, New Layoutparams (

LinearLayout.LayoutParams.WRAP_CONTENT,

LinearLayout.LayoutParams.WRAP_CONTENT));

}

Android: Map the contents of the view into a bitmap-image export