Android截屏分享之View生成图片进行保存分享、全屏，半屏、指定VIew、弹窗.......

Android截屏主要应用在分享这个操作，所有的截屏，截取的是视图。接下来给大家分享一下这个功能的干货

温馨提示：我这里分享使用的是极光的Jshare,也可以使用原生分享
这里是JshareSDK接入的链接：链接: https://docs.jiguang.cn/jshare/client/Android/android_sdk

常规需求，我这里的示例是拿弹窗来演示，标题也说了截取的是view,后面会着重讲解

弹窗中有二维码，顺便说下二维码生成

1. build.gradle （app）中添加zxing依赖：

    //扫描二维码
    implementation 'com.github.yuzhiqiang1993:zxing:2.2.9'
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2. 生成二维码操作

    //生成二维码
	Bitmap logo = BitmapFactory.decodeResource(context.getResources(), R.mipmap.ic_launcher);//二维码中心logo
	Bitmap qrCode = CodeCreator.createQRCode(url, 400, 400, logo);
	ImageView codeImg = view.findViewById(R.id.scan_code);
		if (qrCode != null) {
		    codeImg.setImageBitmap(qrCode);
		}
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回归正题 截取view
1、获取需要截取的View 这里是弹窗中需要截取的view

/**
*dialog中的view获取和回调
*/
 LinearLayout screenshotView = view.findViewById(R.id.screenshot_view);//截取的视图
 //弹窗按钮点击截取 回传view 
 button.setOnClickListener(new View.OnClickListener() {
            @SingleClick
            @Override
            public void onClick(View v) {
                mListener.onSaveAndShare(screenshotView);//需要回传的view
            }
        });

/**
*页面中的dialog回调
*/
  private View screenshotView;
  scanningDialog.setOnShareListener(new ScanningDialog.OnShareListener() {
            @Override
            public void oncLoseDialog() {
                scanningDialog.dismiss();
            }

            @Override
            public void onSaveAndShare(View view) {
                //保存图片并分享
                screenshotView = view;
                screenShotView();
            }
        });
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2、dialog弹窗截屏

  private final int REQUEST_STORAGE = 10223;//存储权限
	 /**
     * dialog弹窗截屏
     * 最终调用方法
     */
    public void screenShotView() {
    	//动态获取权限
        if (checkPermission()) {
            saveShotView();//截取图片
        } else {
            requestPermission();//权限请求
        }
    }

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        if (requestCode == REQUEST_STORAGE) {
            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                saveShotView();//截取图片
            } else {
                requestPermission();//权限请求
            }
        }
    }
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3、获取权限 checkPermission() requestPermission()

/**
    * check权限
    * request权限
    */
 private boolean checkPermission() {
        int selfPermission = ContextCompat.checkSelfPermission(requireContext(), Manifest.permission.WRITE_EXTERNAL_STORAGE);
        return selfPermission == PackageManager.PERMISSION_GRANTED;
    }
private void requestPermission() {
        requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, REQUEST_STORAGE);
    }
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4、截取并分享 saveShotView()

/**
* 截取图片并保存 可截取任意视图
* screenshotView需要截取的view 第一步中的视图对象
*/
 private void saveShotView() {
        String CAMERA_DIR = Environment.getExternalStorageDirectory().getAbsolutePath() + "/DCIM/Camera";
        Bitmap tempBitmap = Bitmap.createBitmap(screenshotView.getWidth(), screenshotView.getHeight(), Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(tempBitmap);
        screenshotView.draw(canvas);
        File fileDir = new File(CAMERA_DIR);
        if (!fileDir.exists()) {
            boolean mkdirs = fileDir.mkdirs();
        }
        String path = CAMERA_DIR + "/share_screen.png";
        try {
            FileOutputStream foStream = new FileOutputStream(path);
            tempBitmap.compress(Bitmap.CompressFormat.PNG, 100, foStream);
            foStream.flush();
            foStream.close();
            if (scanningDialog != null) {
                scanningDialog.dismiss();
            }
            ToastUtils.toast("保存成功,请在相册中查看");
            shareNowImage(path);//todo调用分享
        } catch (Exception e) {
            Log.e("保存图片出错", e.toString());
        }
    }
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5、极光分享 shareNowImage(String path)

	/**
	* path  本地图片路径
	* shareListener分享回调
	*/
    private void shareNowImage(String path) {
        List<String> platforms = JShareInterface.getPlatformList();
        PageEventUtils.inFriendsNow(requireContext());
        ShareParams shareParams = new ShareParams();
        shareParams.setShareType(Platform.SHARE_IMAGE);
        shareParams.setImagePath(path);
        JShareInterface.share(platforms.get(0), shareParams, shareListener);
    }
    //分享回调
     private final PlatActionListener shareListener = new PlatActionListener() {
        @Override
        public void onComplete(Platform platform, int action, HashMap<String, Object> data) {
            ToastUtils.toast("分享成功");
        }

        @Override
        public void onError(Platform platform, int action, int errorCode, Throwable error) {
            Log.e("分享失败", "error:" + errorCode + ",msg:" + error);
        }

        @Override
        public void onCancel(Platform platform, int action) {
            ToastUtils.toast("取消分享");
        }
    };
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推荐链接: 自定义完整二维码分享Dialog代码分享