iOS Android 截屏分享图片，&& iOS自定义图片分享

本文链接：https://blog.youkuaiyun.com/ModalYin/article/details/77849595

本文介绍在Android和iOS平台上实现应用内截图功能的方法，并演示如何将截图分享至社交平台。包括创建截图类、捕获屏幕内容、保存为图片文件及通过Intent或通知进行分享的具体步骤。

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1 Android

创建ScreenShot类来进行截图处理，并返回保存的文件名

public class ScreenShot {
// 获取指定Activity的截屏，保存到png文件
private static Bitmap takeScreenShot(Activity activity) {
// View是你需要截图的View
View view = activity.getWindow().getDecorView();
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
Bitmap b1 = view.getDrawingCache();
// 获取状态栏高度
Rect frame = new Rect();
activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
int statusBarHeight = frame.top;
Log.i("TAG", "" + statusBarHeight);
// 获取屏幕长和高
int width = activity.getWindowManager().getDefaultDisplay().getWidth();
int height = activity.getWindowManager().getDefaultDisplay()
.getHeight();
// 去掉标题栏
// Bitmap b = Bitmap.createBitmap(b1, 0, 25, 320, 455);
Bitmap b = Bitmap.createBitmap(b1, 0, statusBarHeight, width, height
- statusBarHeight);
view.destroyDrawingCache();
return b;
}
// 保存到sdcard
private static void savePic(Bitmap b, String strFileName) {
FileOutputStream fos = null;
try {
fos = new FileOutputStream(strFileName);
if (null != fos) {
b.compress(Bitmap.CompressFormat.PNG, 90, fos);
fos.flush();
fos.close();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
// 程序入口
public static String shoot(Activity a) {
String strFileName = "sdcard/" + String.valueOf(System.currentTimeMillis()) + ".png";
ScreenShot.savePic(ScreenShot.takeScreenShot(a), strFileName);
return strFileName;
}
}

在需要使用的Activity中调用shoot方法，并使用Intent来分享出去

public class MainActivity extends Activity {
private Button btn;
private String image;
private Button btnShare;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn = (Button)findViewById(R.id.btn);
btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
image = ScreenShot.shoot(MainActivity.this);
}
});
btnShare = (Button) findViewById(R.id.btn_share);
btnShare.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_SEND);
File file = new File(image);
intent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(file));
intent.setType("image/jpeg");
Intent chooser = Intent.createChooser(intent, "Share screen shot");
if(intent.resolveActivity(getPackageManager()) != null){
startActivity(chooser);
}
}
});
}
}

2 iOS

1 先注册通知

//分享

[[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(userDidTakeScreenshot:)name:UIApplicationUserDidTakeScreenshotNotificationobject:nil];

/**

* 截屏分享：截屏响应方法

-(void)userDidTakeScreenshot:(NSNotification*)notification{

[TCMGoodsSharePopViewclosePopView];

[selfperformSelector:@selector(createShotScreenView)withObject:nilafterDelay:1];

}

- (void)createShotScreenView{

screenShotView = [TCMGoodsShareScreenShotViewviewFromXIB];

screenShotView.frame =CGRectMake(0,0, GDeviceScreenWidth,GDeviceScreenHeight);

UIImage *image = [UIImageimageWithData:[screenShotViewdataWithScreenshotInPNGFormat]];

//...

[[UIApplicationsharedApplication].keyWindowaddSubview:screenShotView];

//回调

[screenShotViewdisplayWithData:imagecodeUrl:theItemInfo.goodsInfo.theShareQRCodeActionBlocks:^(ShareStatusAction statusAction,UIImage *image) {

NSInteger tag = (statusAction ==ShareStatusAction_weixinTimeLine)?0:1;

[selfshareImage:image Btntag:tag];

} CancelBlock:^{

[screenShotViewremoveFromSuperview];

}];

}

#pragma mark - 分享：截屏分享和自定义图片分享

- (void)shareImage:(UIImage *)shareImage Btntag:(NSInteger)tag {

[[UMSocialManagerdefaultManager]setPlaform:UMSocialPlatformType_WechatSessionappKey:[TCMAppKeyManagertheValueForKeyType:TCM_SDK_Key_Type_AppIdforSDK:TCM_INTEGRATE_SDK_Type_WX]appSecret:[TCMAppKeyManagertheValueForKeyType:TCM_SDK_Key_Type_AppSecretforSDK:TCM_INTEGRATE_SDK_Type_WX]redirectURL:@""];

UMSocialPlatformType platformType = (tag ==0)? UMSocialPlatformType_WechatTimeLine:UMSocialPlatformType_WechatSession;

//创建分享消息对象

UMSocialMessageObject *messageObject = [UMSocialMessageObjectmessageObject];

UMShareImageObject* shareImgObj = [UMShareImageObjectshareObjectWithTitle:@"title"descr:@"descr"thumImage:shareImage];

shareImgObj.shareImage = shareImage;

messageObject.shareObject = shareImgObj;

//调用分享接口

[[UMSocialManagerdefaultManager] shareToPlatform:platformTypemessageObject:messageObjectcurrentViewController:selfcompletion:^(id data,NSError *error) {

//隐藏截图视图

[screenShotViewremoveFromSuperview];

[TCMGoodsSharePopViewclosePopView];

if (error) {

// [CESHelper showPromptHUBWithMsg:@"温馨提示" detailMsg:error.domain timeInterval:1.5];

// UMSocialLogInfo(@"错误回调 is %@",error.domain);

}else{

if ([dataisKindOfClass:[UMSocialShareResponseclass]]) {

UMSocialShareResponse *resp = data;

UMSocialLogInfo(@"分享结果消息response message is %@",resp.message);

UMSocialLogInfo(@"第三方原始返回的数据response originalResponse data is %@",resp.originalResponse);

}else{

UMSocialLogInfo(@"response data is %@",data);

}

}];

}

截屏的方法如下：

//截取当前屏幕

-(NSData *)dataWithScreenshotInPNGFormat{

CGSize imageSize =CGSizeZero;

UIInterfaceOrientation orientation = [UIApplicationsharedApplication].statusBarOrientation;

if (UIInterfaceOrientationIsPortrait(orientation))

imageSize = [UIScreenmainScreen].bounds.size;

else

imageSize = CGSizeMake([UIScreenmainScreen].bounds.size.height, [UIScreen mainScreen].bounds.size.width);

UIGraphicsBeginImageContextWithOptions(imageSize,NO, 0);

CGContextRef context =UIGraphicsGetCurrentContext();

for (UIWindow *windowin [[UIApplicationsharedApplication] windows])

{

CGContextSaveGState(context);

CGContextTranslateCTM(context, window.center.x, window.center.y);

CGContextConcatCTM(context, window.transform);

CGContextTranslateCTM(context, -window.bounds.size.width * window.layer.anchorPoint.x, -window.bounds.size.height * window.layer.anchorPoint.y);

if (orientation ==UIInterfaceOrientationLandscapeLeft)

{

CGContextRotateCTM(context,M_PI_2);

CGContextTranslateCTM(context,0, -imageSize.width);

}

elseif (orientation ==UIInterfaceOrientationLandscapeRight)

{

CGContextRotateCTM(context, -M_PI_2);

CGContextTranslateCTM(context, -imageSize.height,0);

} elseif (orientation ==UIInterfaceOrientationPortraitUpsideDown) {

CGContextRotateCTM(context,M_PI);

CGContextTranslateCTM(context, -imageSize.width, -imageSize.height);

}

if ([windowrespondsToSelector:@selector(drawViewHierarchyInRect:afterScreenUpdates:)])

{

[window drawViewHierarchyInRect:window.boundsafterScreenUpdates:YES];

}

else

{

[window.layerrenderInContext:context];

}

CGContextRestoreGState(context);

}

UIImage *image =UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

returnUIImagePNGRepresentation(image);

}

//生成的图片

- (UIImage *)snapshotViewFromRect:(CGRect)rect withCapInsets:(UIEdgeInsets)capInsets View:(UIView *)view {

UIGraphicsBeginImageContextWithOptions(rect.size,NO, [UIScreenmainScreen].scale);

CGContextRef currentContext =UIGraphicsGetCurrentContext();

[view.layerrenderInContext:currentContext];

UIImage *snapshotImage =UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

UIImageView *snapshotView = [[UIImageViewalloc] initWithFrame:rect];

snapshotView.image = [snapshotImageresizableImageWithCapInsets:capInsets];

// UIGraphicsBeginImageContextWithOptions(CGSizeMake(rect.size.width, rect.size.height + heightWithShuiYin), NO, [UIScreen mainScreen].scale);

// UIImageView * snapshotView = [[UIImageView alloc]initWithFrame:CGRectMake(rect.origin.x, rect.origin.y, rect.size.width, rect.size.height + heightWithShuiYin)];

return snapshotView.image;

}

三如果需求是自定义图片分享，先创建视图，然后获取上下文去得到图片分享得到图片的方法如下；

//生成的图片

- (UIImage *)snapshotViewFromRect:(CGRect)rect withCapInsets:(UIEdgeInsets)capInsets {

UIGraphicsBeginImageContextWithOptions(rect.size,NO, [UIScreenmainScreen].scale);

CGContextRef currentContext =UIGraphicsGetCurrentContext();

NSLog(@"width=%.2f,height=%.2f",self.layer.frame.size.width,self.layer.frame.size.height);