Android使用scrollview截取整个的屏幕并分享微信

先看看截图效果图

截取scrollview的屏幕

    /**
     * 截取scrollview的屏幕
     **/
    public static Bitmap getScrollViewBitmap(ScrollView scrollView) {
        int h = 0;
        Bitmap bitmap;
        for (int i = 0; i < scrollView.getChildCount(); i++) {
            h += scrollView.getChildAt(i).getHeight();
        }
        // 创建对应大小的bitmap
        bitmap = Bitmap.createBitmap(scrollView.getWidth(), h,
                Bitmap.Config.RGB_565);
        final Canvas canvas = new Canvas(bitmap);
        scrollView.draw(canvas);
        return bitmap;
    }

压缩图片

    /**
     * 压缩图片
     * @param image
     * @return
     */
    public static Bitmap compressImage(Bitmap image, int quality) {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        // 质量压缩方法，这里100表示不压缩，把压缩后的数据存放到baos中
        image.compress(Bitmap.CompressFormat.JPEG, quality, baos);
        int options = 100;
        // 循环判断如果压缩后图片是否大于100kb,大于继续压缩
//        while (baos.toByteArray().length / 1024 > 30) {
            // 重置baos
            baos.reset();
            // 这里压缩options%，把压缩后的数据存放到baos中
           image.compress(Bitmap.CompressFormat.JPEG, quality, baos);
            // 每次都减少10
//            options -= 10;
//        }
        // 把压缩后的数据baos存放到ByteArrayInputStream中
        ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());
        // 把ByteArrayInputStream数据生成图片
        return BitmapFactory.decodeStream(isBm, null, null);
    }

点击按钮弹窗分享dialog提示窗

    //----点分享朋友弹出PopupWindow
    private void showPopupWindow() {
        View contentView = LayoutInflater.from(GroupBulkActivity.this).inflate(R.layout.popupdow_share, null, false);
        window = new PopupWindow(contentView, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT, true);
        window.setOutsideTouchable(true);
        window.setOnDismissListener(new PopupWindow.OnDismissListener() {
            @Override
            public void onDismiss() {
                backgroundAlpha(GroupBulkActivity.this, 1.0f);
            }
        });
        backgroundAlpha(GroupBulkActivity.this, 0.5f);//0.0-1.0
        iv_wx = contentView.findViewById(R.id.iv_image1);
        iv_fiend = contentView.findViewById(R.id.iv_image2);
        im_delt = contentView.findViewById(R.id.im_delt);
        rl_delt = contentView.findViewById(R.id.rl_delt);

        window.showAtLocation(LayoutInflater.from(GroupBulkActivity.this).inflate(R.layout.activity_group_bulk, null), Gravity.BOTTOM, 0, 0);

        iv_wx.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
               wechatShare(0);
                window.dismiss();
                backgroundAlpha(GroupBulkActivity.this, 1f);
            }
        });
        iv_fiend.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                wechatShare(1);
                window.dismiss();
                backgroundAlpha(GroupBulkActivity.this, 1f);
            }
        });
        rl_delt.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                window.dismiss();
                backgroundAlpha(GroupBulkActivity.this, 1f);
            }
        });
    }

dailog布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                android:id="@+id/parent"
                android:layout_width="match_parent"
                android:layout_height="match_parent">


    <LinearLayout
        android:id="@+id/ll_share"
        android:layout_width="match_parent"
        android:layout_height="183dp"
        android:background="#FFFFFF"
        android:orientation="vertical">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="1px"
            android:background="#e4e4e4"/>

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="45dp">

            <TextView
                android:id="@+id/item_popupwindows_Photo"
                android:layout_width="match_parent"
                android:layout_height="55dp"
                android:background="@drawable/bt_nobgd"
                android:gravity="center"
                android:text="分享给好友"
                android:textColor="#585858"
                android:textSize="14sp"/>

            <RelativeLayout
                android:id="@+id/rl_delt"
                android:layout_width="wrap_content"
              android:layout_marginLeft="320dp"
                android:layout_height="55dp">
                <ImageView
                    android:id="@+id/im_delt"
                    android:layout_width="14dp"
                    android:layout_height="14dp"
                    android:layout_alignParentRight="true"
                    android:layout_marginRight="21dp"
                    android:layout_marginTop="14dp"
                    android:gravity="center"
                    android:src="@drawable/down"
                    android:textColor="#585858"
                    android:textSize="12sp"/>
            </RelativeLayout>


        </RelativeLayout>

        <TextView
            android:layout_width="match_parent"
            android:layout_height="1px"
            android:background="#9e8888"/>


        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:clipChildren="false"
            >


            <LinearLayout
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_marginTop="40dp"
                android:layout_weight="1"
                android:gravity="center"
                android:orientation="vertical">

                <ImageView
                    android:id="@+id/iv_image1"
                    android:layout_width="50dp"
                    android:layout_height="50dp"
                    android:src="@drawable/weixin"/>

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:textColor="#333333"
                    android:textSize="13sp"
                    android:layout_marginTop="5dp"
                    android:text="微信"/>


            </LinearLayout>

            <LinearLayout
                android:layout_width="0dp"
                android:layout_height="wrap_content"

                android:layout_weight="1"
                android:gravity="center"
                android:orientation="vertical">

                <ImageView

                    android:id="@+id/iv_image2"
                    android:layout_width="50dp"
                    android:layout_height="50dp"
                    android:layout_marginTop="40dp"
                    android:src="@drawable/pengyou"/>

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:textColor="#333333"
                    android:textSize="13sp"
                    android:layout_marginTop="5dp"
                    android:text="朋友圈"/>
            </LinearLayout>
        </LinearLayout>
    </LinearLayout>
</RelativeLayout>

分享图片到微信或盆友圈

    private void wechatShare(int flag) {
        String baseUrl = Cache.exist(CacheKey.BASE_URL) ? Cache.get(CacheKey.BASE_URL).toString() : URL.BASE_URL;
        // 分享图片
        Bitmap mBitmap = getScrollViewBitmap(scrollView);
//        Bitmap mBitmap = CodeUtils.createImage(data.getCodeUrl(), 200, 200, BitmapFactory.decodeResource(getResources(), R.drawable.logo));
        //初始化WXImageObject和WXMediaMessage对象
        WXImageObject imageObject = new WXImageObject(compressImage(mBitmap, 80));
        WXMediaMessage msg = new WXMediaMessage();
        msg.mediaObject = imageObject;
//        mBitmap = getScrollViewBitmap(scrollView);
        msg.setThumbImage(Bitmap.createScaledBitmap(mBitmap, 200, 200, true));

        mBitmap.recycle();
        //构造一个Req
        SendMessageToWX.Req req = new SendMessageToWX.Req();
        req.transaction = String.valueOf(System.currentTimeMillis());
        req.message = msg;
        req.scene = flag == 0 ? SendMessageToWX.Req.WXSceneSession : SendMessageToWX.Req.WXSceneTimeline;
        MyApp.api.sendReq(req);

    }

最终实现效果如图所示........