如何将视图或布局转换为图像并使用意图共享

我正在尝试将卡片视图转换为图像并通过whats应用程序共享。我正在使用文件提供程序，因为测试设备的版本更高。

因此，当我尝试创建文件时，它给了我一个例外

e = {IllegalArgumentException@7727} "java.lang.IllegalArgumentException: Failed to find configured root that contains /com.example.onboardingversion2/images/card_image"
mCardFile = {File@7701} "com.example.onboardingversion2/images/card_image"

对于代码：

   public void createFile() {
        FileOutputStream outputStream = null;
        try {
      File imagePath = new File(getActivity().getPackageName(), "images");
            mCardFile = new File(imagePath, "card_image");
            Uri contentUri = getUriForFile(getContext(), getActivity().getPackageName() + ".provider", mCardFile);
            sendCard(contentUri);
        } catch (Exception e) {
            e.printStackTrace();
        }
}

当我使用 getFilesDir(( 使用以下代码时，它只会转到应用程序意图，当我尝试共享时不会显示任何图像。

     File imagePath = new File(getActivity().getFilesDir(), "images");
            mCardFile = new File(imagePath, "card_image");
            Uri contentUri = getUriForFile(getContext(), getActivity().getPackageName() + ".provider", mCardFile);
            sendCard(contentUri);

XML 文件

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <files-path name="my_images" path="images/"/>
</paths>

清单

     <provider
        android:name="androidx.core.content.FileProvider"
        android:authorities="${applicationId}.provider"
        android:exported="false"
        android:grantUriPermissions="true">
        <meta-data
            android:name="android.support.FILE_PROVIDER_PATHS"
            android:resource="@xml/provider_paths" />
    </provider>

将视图转换为位图

 public Bitmap viewToBitmap(final View view) {
    cardView.post(new Runnable() {
        @Override
        public void run() {
            mBitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(), Bitmap.Config.ARGB_8888);
            Canvas canvas = new Canvas(mBitmap);
            view.draw(canvas);
            createFile();
        }
    });
    return mBitmap;
}

股票代码：

public void sendCard(Uri contentUri)
{
    Intent whatsappIntent = new Intent(Intent.ACTION_SEND);
    whatsappIntent.setType("text/plain");
    whatsappIntent.setPackage("com.whatsapp");
    whatsappIntent.putExtra(Intent.EXTRA_TEXT, "The text you wanted to share");
    whatsappIntent.putExtra(Intent.EXTRA_STREAM, contentUri);
    whatsappIntent.setType("image/jpeg");
    whatsappIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
    try {
        getActivity().startActivity(whatsappIntent);
    } catch (android.content.ActivityNotFoundException ex) {
        Utils.showDialog(getActivity(),"Whats App have not been installed.");
    }
}

我

有一个卡片视图，我正在尝试将其创建为位图，并将位图转换为图像文件并使用共享意图进行共享。

我哪里出错了？视图无法转换为图像吗？

请帮忙。谢谢。

首先添加权限

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

使用 res 中的位图

Bitmap b =BitmapFactory.decodeResource(getResources(),R.drawable.userimage);
Intent share = new Intent(Intent.ACTION_SEND);
share.setType("image/jpeg");
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
b.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
String path = MediaStore.Images.Media.insertImage(getContentResolver(),
                b, "Title", null);
Uri imageUri =  Uri.parse(path);
share.putExtra(Intent.EXTRA_STREAM, imageUri);
startActivity(Intent.createChooser(share, "Select"));

这是一种没有必要权限的简单方法：

在您的 res 文件夹中创建 XML 文件夹(右键单击 res -> 新建 -> android 资源目录 ->资源类型：XML(。
创建名为 file_paths.xml 的新 XML 文件
将此代码粘贴在里面

file_paths.xml：

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <cache-path name="Download" path="." />
</paths>

在清单中，将以下行粘贴到应用程序下：

    <provider
        android:name="android.support.v4.content.FileProvider"
        android:authorities="${applicationId}.my.package.name.provider"
        android:exported="false"
        android:grantUriPermissions="true">
        <meta-data
            android:name="android.support.FILE_PROVIDER_PATHS"
            android:resource="@xml/file_paths" />
    </provider>

在您的班级中：

public void sendViewViaMail(final View view, final Context baseContext, final Context activityContextOnly, final String textToMail) {
    view.post(new Runnable() {
        @Override
        public void run() {
            int heightG = view.getHeight();
            int widthG = view.getWidth();
            sendViewViaMail(view, baseContext, activityContextOnly, widthG, heightG, textToMail);
        }
    });
}

private void sendViewViaMail(View view, final Context baseContext, Context activityContextOnly, int widthG, int heightG, String textToMail) {
    Bitmap bitmap = MyBitmapUtils.createViewBitmap(view, widthG, heightG);
    Uri imageUri = null;
        File file = null;
        FileOutputStream fos1 = null;
        try {
            File folder = new File(activityContextOnly.getCacheDir() + File.separator + "My Temp Files");
            boolean success = true;
            if (!folder.exists()) {
                success = folder.mkdir();
            }
            String filename = "img.jpg";
            file = new File(folder.getPath(), filename);
            fos1 = new FileOutputStream(file);
            bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos1);
            imageUri = FileProvider.getUriForFile(activityContextOnly, activityContextOnly.getPackageName() + ".my.package.name.provider", file);
        } catch (Exception ex) {
        } finally {
            try {
                fos1.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    final Intent emailIntent1 = new Intent(Intent.ACTION_SEND);
    emailIntent1.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    emailIntent1.putExtra(Intent.EXTRA_EMAIL, new String[]{});
    emailIntent1.putExtra(Intent.EXTRA_STREAM, imageUri);
    emailIntent1.putExtra(Intent.EXTRA_SUBJECT, "[" + "COMPANY_HEADER" + "]");
    emailIntent1.putExtra(Intent.EXTRA_TEXT, textToMail);
    emailIntent1.setData(Uri.parse("mailto:" + "mail@gmail.com")); // or just "mailto:" for blank
    emailIntent1.setType("image/jpg");
    activityContextOnly.startActivity(Intent.createChooser(emailIntent1, "Send email using"));
}
public static Bitmap createViewBitmap(View view, int widthG, int heightG) {
    Bitmap viewBitmap = Bitmap.createBitmap(widthG, heightG, Bitmap.Config.RGB_565);
    Canvas viewCanvas = new Canvas(viewBitmap);
    Drawable backgroundDrawable = view.getBackground();
    if(backgroundDrawable!=null){
        backgroundDrawable.draw(viewCanvas);
    }
    else{
        viewCanvas.drawColor(Color.WHITE);
        view.draw(viewCanvas);
    }
    return viewBitmap;
}

如何称呼它：

CardView myCard = (CardView) findViewById(R.id.myCard);
sendViewViaMail(myCard, getApplicationContext(), Activity_Cabinet.this, report);

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