Android屏幕及view的截图实例详解

android屏幕及view的截图实例详解

屏幕可见区域的截图

整个屏幕截图的话可以用view view = getwindow().getdecorview();

public static bitmap getnormalviewscreenshot(view view) {
    view.setdrawingcacheenabled(true);
    view.builddrawingcache();
    return view.getdrawingcache();
  }

scrollview的整体截屏

public static bitmap getwholescrollviewtobitmap(view view) {
    view.measure(measurespec.makemeasurespec(0, measurespec.unspecified),
        measurespec.makemeasurespec(0, measurespec.unspecified));
    view.layout(0, 0, view.getmeasuredwidth(), view.getmeasuredheight());
    view.builddrawingcache();
    bitmap bitmap = view.getdrawingcache();
    return bitmap;
  }

webview的整体截图

public static bitmap getwholewebviewtobitmap(webview webview) {
    picture snapshot = webview.capturepicture();
    bitmap bmp = bitmap.createbitmap(snapshot.getwidth(), snapshot.getheight(), bitmap.config.argb_8888);
    canvas canvas = new canvas(bmp);
    snapshot.draw(canvas);
    return bmp;
  }

listview的整体截图

public static bitmap getwholelistviewitemstobitmap(listview listview) {

    listadapter adapter = listview.getadapter();
    int itemscount = adapter.getcount();
    int allitemsheight = 0;
    list<bitmap> bmps = new arraylist<bitmap>();

    for (int i = 0; i < itemscount; i++) {

      view childview = adapter.getview(i, null, listview);
      childview.measure(measurespec.makemeasurespec(listview.getwidth(), measurespec.exactly),
          measurespec.makemeasurespec(0, measurespec.unspecified));

      childview.layout(0, 0, childview.getmeasuredwidth(), childview.getmeasuredheight());
      childview.setdrawingcacheenabled(true);
      childview.builddrawingcache();
      bmps.add(childview.getdrawingcache());
      allitemsheight += childview.getmeasuredheight();
    }

    bitmap bigbitmap = bitmap.createbitmap(listview.getmeasuredwidth(), allitemsheight, bitmap.config.argb_8888);
    canvas bigcanvas = new canvas(bigbitmap);

    paint paint = new paint();
    int iheight = 0;

    for (int i = 0; i < bmps.size(); i++) {
      bitmap bmp = bmps.get(i);
      bigcanvas.drawbitmap(bmp, 0, iheight, paint);
      iheight += bmp.getheight();

      bmp.recycle();
      bmp = null;
    }
    return bigbitmap;
  }

需要多次截图的话，需要用到 view.destroydrawingcache();

bitmap normalviewscreenshot = screenshotutils.getnormalviewscreenshot(mframecontent);
        if (normalviewscreenshot != null) {
          bitmap b = bitmap.createbitmap(normalviewscreenshot);
          mimageresult.setimagebitmap(b);
          mframecontent.destroydrawingcache();
        }

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