Android将view保存为图片并放在相册中

<RelativeLayout
                android:id="@+id/lanjing_code_rl"   //要保存的view id
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_margin="20dp"
                android:paddingBottom="10dp"
                android:layout_weight="1"
                android:background="@drawable/round_main_bg" >

                <RelativeLayout
                    android:id="@+id/lanjing_code_info"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_alignParentTop="true"
                    android:layout_marginLeft="20dp" >

                    <ImageView
                        android:id="@+id/self_head"
                        android:layout_width="50dp"
                        android:layout_height="50dp"
                        android:layout_alignParentLeft="true"
                        android:layout_alignParentTop="true"
                        android:layout_marginTop="20dp"
                        android:background="@drawable/defaultuser" />

                    <TextView
                        android:id="@+id/self_name"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_alignParentTop="true"
                        android:layout_marginLeft="20dp"
                        android:layout_marginTop="20dp"
                        android:layout_toRightOf="@+id/self_head"
                        android:gravity="center"
                        android:maxLines="2"
                        android:textColor="@color/article_black"
                        android:textSize="16sp"
                        android:textStyle="bold" />

                    <TextView
                        android:id="@+id/self_hospital"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_below="@+id/self_name"
                        android:layout_gravity="center_horizontal"
                        android:layout_marginLeft="20dp"
                        android:layout_marginTop="3dp"
                        android:layout_toRightOf="@+id/self_head"
                        android:textColor="@color/article_gray"
                        android:textSize="14sp" />
                </RelativeLayout>

                <ImageView
                    android:id="@+id/lanjing_code_img"
                    android:layout_width="200dp"
                    android:layout_height="200dp"
                    android:layout_below="@+id/lanjing_code_info"
                    android:layout_centerHorizontal="true"
                    android:layout_marginTop="10dp"
                    android:scaleType="fitCenter" />

                <TextView
                    android:id="@+id/lanjing_code_txt"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_below="@+id/lanjing_code_img"
                    android:layout_centerHorizontal="true"
                    android:layout_marginTop="5dp"
                    android:gravity="center"
                    android:textColor="@color/number_blue"
                    android:textScaleX="1.5"
                    android:textSize="23sp" />

                <TextView
                    android:id="@+id/lanjing_tishi"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_below="@+id/lanjing_code_txt"
                    android:layout_centerHorizontal="true"
                    android:layout_marginTop="5dp"
                    android:text="扫一扫上面的二维码图案，加我蓝鲸医生"
                    android:textColor="@color/solid_gray"
                    android:textSize="14sp" />
            </RelativeLayout>

private void saveErweima() {   
　　　　　File erweimaImg = FileUtilss.getErweimaImgFile(MyLanJingCode.this);
if (erweimaImg == null) {
            return;
        }
        //lanjing_code_rl.setBackgroundColor(getResources().getColor(R.color.solid_white));
        if (false == lanjing_code_rl.isDrawingCacheEnabled()) {
            lanjing_code_rl.setDrawingCacheEnabled(true);
        }
        lanjing_code_rl.buildDrawingCache();
        Bitmap bitmap = lanjing_code_rl.getDrawingCache();

　　　　　String path = erweimaImg.getAbsolutePath();
        FileOutputStream out = new FileOutputStream(path);
        bmp.compress(Bitmap.CompressFormat.PNG, 100, out);
        out.flush();
        out.close();

　　　　 lanjing_code_rl.setDrawingCacheEnabled(false);
            
        MediaScannerConnection.scanFile(MyLanJingCode.this, new String[] { Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM).getPath() + "/" + path }, null, null);
        saveImgToGallery(path);

    }

public boolean saveImgToGallery(String fileName) {
        boolean sdCardExist = Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED); // 判断sd卡是否存在
        if (!sdCardExist)
            return false;

        try {

            ContentValues values = new ContentValues();
            values.put("datetaken", new Date().toString());
            values.put("mime_type", "image/jpg");
            values.put("_data", fileName);
            Application app = DoctorApplication.getInstance();
            ContentResolver cr = app.getContentResolver();
            cr.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);

        } catch (Exception e) {
            e.printStackTrace();
        }
        return true;
    }