通过Android Intent共享位图_Android_Android Intent_Bitmap_Intentfilter

通过Android Intent共享位图

android

通过Android Intent共享位图,android,android-intent,bitmap,intentfilter,Android,Android Intent,Bitmap,Intentfilter,在我的android应用程序中，我有一个位图（比如b）和一个按钮。现在，当我点击按钮，我想分享位图。我正在使用我的onClick（）中的以下代码来实现这一点：- Intent intent = new Intent(Intent.ACTION_SEND); intent.setType("image/png"); intent.putExtra(Intent.EXTRA_STREAM, b); startActivity(Intent.createChooser(intent , "Share"

在我的android应用程序中，我有一个位图（比如b）和一个按钮。现在，当我点击按钮，我想分享位图。我正在使用我的

onClick（）

中的以下代码来实现这一点：-

Intent intent = new Intent(Intent.ACTION_SEND);
intent.setType("image/png");
intent.putExtra(Intent.EXTRA_STREAM, b);
startActivity(Intent.createChooser(intent , "Share"));

我期待所有能够处理这个意图的应用程序的列表，但我什么也没有得到。android studio中没有应用程序列表，也没有任何错误。我的申请被挂了一段时间，然后就退出了

我已经检查了位图，它很好（它不是空的）

我哪里出错了？

引用：

内容：一个URI，包含与意图相关联的数据流，与操作_SEND一起使用，以提供正在发送的数据

因此，

不应该是

位图

，而是指向

位图

的

Uri

，由

内容提供者提供服务。例如，您可以将位图
写入一个文件，然后使用文件提供程序
为其提供服务。
正如Commonware所述，您需要获取位图的URI，并将其作为额外的URI传递
String bitmapPath = Images.Media.insertImage(getContentResolver(), bitmap,"title", null);
Uri bitmapUri = Uri.parse(bitmapPath);
...
intent.putExtra(Intent.EXTRA_STREAM, bitmapUri );

**我终于找到了解决办法。**
第1步：
共享意图处理块。这将弹出窗口，显示手机中的应用程序列表
public void share_bitMap_to_Apps() {

    Intent i = new Intent(Intent.ACTION_SEND);

    i.setType("image/*");
    ByteArrayOutputStream stream = new ByteArrayOutputStream();
    /*compress(Bitmap.CompressFormat.PNG, 100, stream);
    byte[] bytes = stream.toByteArray();*/


    i.putExtra(Intent.EXTRA_STREAM, getImageUri(mContext, getBitmapFromView(relative_me_other)));
    try {
        startActivity(Intent.createChooser(i, "My Profile ..."));
    } catch (android.content.ActivityNotFoundException ex) {

        ex.printStackTrace();
    }


}

public Uri getImageUri(Context inContext, Bitmap inImage) {
    ByteArrayOutputStream bytes = new ByteArrayOutputStream();
    inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes);

    String path = MediaStore.Images.Media.insertImage(inContext.getContentResolver(), inImage, "Title", null);
    return Uri.parse(path);
}

第二步：
将视图转换为位图
public static Bitmap getBitmapFromView(View view) {
    //Define a bitmap with the same size as the view
    Bitmap returnedBitmap = Bitmap.createBitmap(view.getWidth(),      view.getHeight(), Bitmap.Config.ARGB_8888);
    //Bind a canvas to it
    Canvas canvas = new Canvas(returnedBitmap);
    //Get the view's background
    Drawable bgDrawable = view.getBackground();
    if (bgDrawable != null)
        //has background drawable, then draw it on the canvas
        bgDrawable.draw(canvas);
    else
        //does not have background drawable, then draw white background on the canvas
        canvas.drawColor(Color.WHITE);
    // draw the view on the canvas
    view.draw(canvas);
    //return the bitmap
    return returnedBitmap;
}

ImageView imageView = findViewById(R.id.image);
Bitmap bitmap = ((BitmapDrawable) imageView.getDrawable()).getBitmap();

//save the image now:
saveImage(bitmap);
//share it
send();

第三步：
private static void saveImage(Bitmap finalBitmap) {

    String root = Environment.getExternalStorageDirectory().getAbsolutePath();
    File myDir = new File(root + "/saved_images");
    Log.i("Directory", "==" + myDir);
    myDir.mkdirs();

    String fname = "Image-test" + ".jpg";
    File file = new File(myDir, fname);
    if (file.exists()) file.delete();
    try {
        FileOutputStream out = new FileOutputStream(file);
        finalBitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);
        out.flush();
        out.close();

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

public void send() {
    try {
        File myFile = new File("/storage/emulated/0/saved_images/Image-test.jpg");
        MimeTypeMap mime = MimeTypeMap.getSingleton();
        String ext = myFile.getName().substring(myFile.getName().lastIndexOf(".") + 1);
        String type = mime.getMimeTypeFromExtension(ext);
        Intent sharingIntent = new Intent("android.intent.action.SEND");
        sharingIntent.setType(type);
        sharingIntent.putExtra("android.intent.extra.STREAM", Uri.fromFile(myFile));
        startActivity(Intent.createChooser(sharingIntent, "Share using"));
    } catch (Exception e) {
        Toast.makeText(getBaseContext(), e.getMessage(), Toast.LENGTH_SHORT).show();
    }
}

从位图图像获取URI
public void share_bitMap_to_Apps() {

    Intent i = new Intent(Intent.ACTION_SEND);

    i.setType("image/*");
    ByteArrayOutputStream stream = new ByteArrayOutputStream();
    /*compress(Bitmap.CompressFormat.PNG, 100, stream);
    byte[] bytes = stream.toByteArray();*/


    i.putExtra(Intent.EXTRA_STREAM, getImageUri(mContext, getBitmapFromView(relative_me_other)));
    try {
        startActivity(Intent.createChooser(i, "My Profile ..."));
    } catch (android.content.ActivityNotFoundException ex) {

        ex.printStackTrace();
    }


}

public Uri getImageUri(Context inContext, Bitmap inImage) {
    ByteArrayOutputStream bytes = new ByteArrayOutputStream();
    inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes);

    String path = MediaStore.Images.Media.insertImage(inContext.getContentResolver(), inImage, "Title", null);
    return Uri.parse(path);
}

我发现了该解决方案的两种变体。两者都涉及将位图保存到存储器，但图像不会显示在库中
第一种变体：
保存到外部存储器

但要转到应用程序的私人文件夹
对于API，在花费大量时间之后：
检查是否已授予权限。然后：
private static void saveImage(Bitmap finalBitmap) {

    String root = Environment.getExternalStorageDirectory().getAbsolutePath();
    File myDir = new File(root + "/saved_images");
    Log.i("Directory", "==" + myDir);
    myDir.mkdirs();

    String fname = "Image-test" + ".jpg";
    File file = new File(myDir, fname);
    if (file.exists()) file.delete();
    try {
        FileOutputStream out = new FileOutputStream(file);
        finalBitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);
        out.flush();
        out.close();

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

public void send() {
    try {
        File myFile = new File("/storage/emulated/0/saved_images/Image-test.jpg");
        MimeTypeMap mime = MimeTypeMap.getSingleton();
        String ext = myFile.getName().substring(myFile.getName().lastIndexOf(".") + 1);
        String type = mime.getMimeTypeFromExtension(ext);
        Intent sharingIntent = new Intent("android.intent.action.SEND");
        sharingIntent.setType(type);
        sharingIntent.putExtra("android.intent.extra.STREAM", Uri.fromFile(myFile));
        startActivity(Intent.createChooser(sharingIntent, "Share using"));
    } catch (Exception e) {
        Toast.makeText(getBaseContext(), e.getMessage(), Toast.LENGTH_SHORT).show();
    }
}

步骤1：创建要在活动中显示的图像的ImageView，然后将其转换为无位图
public static Bitmap getBitmapFromView(View view) {
    //Define a bitmap with the same size as the view
    Bitmap returnedBitmap = Bitmap.createBitmap(view.getWidth(),      view.getHeight(), Bitmap.Config.ARGB_8888);
    //Bind a canvas to it
    Canvas canvas = new Canvas(returnedBitmap);
    //Get the view's background
    Drawable bgDrawable = view.getBackground();
    if (bgDrawable != null)
        //has background drawable, then draw it on the canvas
        bgDrawable.draw(canvas);
    else
        //does not have background drawable, then draw white background on the canvas
        canvas.drawColor(Color.WHITE);
    // draw the view on the canvas
    view.draw(canvas);
    //return the bitmap
    return returnedBitmap;
}

ImageView imageView = findViewById(R.id.image);
Bitmap bitmap = ((BitmapDrawable) imageView.getDrawable()).getBitmap();

//save the image now:
saveImage(bitmap);
//share it
send();

步骤2：将图像存储在内部文件夹中：
private static void saveImage(Bitmap finalBitmap) {

    String root = Environment.getExternalStorageDirectory().getAbsolutePath();
    File myDir = new File(root + "/saved_images");
    Log.i("Directory", "==" + myDir);
    myDir.mkdirs();

    String fname = "Image-test" + ".jpg";
    File file = new File(myDir, fname);
    if (file.exists()) file.delete();
    try {
        FileOutputStream out = new FileOutputStream(file);
        finalBitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);
        out.flush();
        out.close();

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

public void send() {
    try {
        File myFile = new File("/storage/emulated/0/saved_images/Image-test.jpg");
        MimeTypeMap mime = MimeTypeMap.getSingleton();
        String ext = myFile.getName().substring(myFile.getName().lastIndexOf(".") + 1);
        String type = mime.getMimeTypeFromExtension(ext);
        Intent sharingIntent = new Intent("android.intent.action.SEND");
        sharingIntent.setType(type);
        sharingIntent.putExtra("android.intent.extra.STREAM", Uri.fromFile(myFile));
        startActivity(Intent.createChooser(sharingIntent, "Share using"));
    } catch (Exception e) {
        Toast.makeText(getBaseContext(), e.getMessage(), Toast.LENGTH_SHORT).show();
    }
}

步骤3：发送保存的图像：
private static void saveImage(Bitmap finalBitmap) {

    String root = Environment.getExternalStorageDirectory().getAbsolutePath();
    File myDir = new File(root + "/saved_images");
    Log.i("Directory", "==" + myDir);
    myDir.mkdirs();

    String fname = "Image-test" + ".jpg";
    File file = new File(myDir, fname);
    if (file.exists()) file.delete();
    try {
        FileOutputStream out = new FileOutputStream(file);
        finalBitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);
        out.flush();
        out.close();

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

public void send() {
    try {
        File myFile = new File("/storage/emulated/0/saved_images/Image-test.jpg");
        MimeTypeMap mime = MimeTypeMap.getSingleton();
        String ext = myFile.getName().substring(myFile.getName().lastIndexOf(".") + 1);
        String type = mime.getMimeTypeFromExtension(ext);
        Intent sharingIntent = new Intent("android.intent.action.SEND");
        sharingIntent.setType(type);
        sharingIntent.putExtra("android.intent.extra.STREAM", Uri.fromFile(myFile));
        startActivity(Intent.createChooser(sharingIntent, "Share using"));
    } catch (Exception e) {
        Toast.makeText(getBaseContext(), e.getMessage(), Toast.LENGTH_SHORT).show();
    }
}

现在，在发送后，如果不想将保存的图像保存在存储器中，您可以删除该图像。检查其他链接以执行此操作。
Kotlin中的解决方案在图像文件名中带有时间戳：
private void sharePalette(Bitmap bitmap) {

 String bitmapPath = MediaStore.Images.Media.insertImage(getContentResolver(), bitmap, "palette", "share palette");
    Uri bitmapUri = Uri.parse(bitmapPath);

    Intent intent = new Intent(Intent.ACTION_SEND);
    intent.setType("image/png");
    intent.putExtra(Intent.EXTRA_STREAM, bitmapUri);
    startActivity(Intent.createChooser(intent, "Share"));
}

val timeStamp = SimpleDateFormat("yyyyMMdd_HHmmss").format(Date())
val imagePath = MediaStore.Images.Media.insertImage(
    context?.contentResolver,
    bitmap,
    "img_$timeStamp",
    null
)
val shareIntent = Intent(Intent.ACTION_SEND).apply {
    type = "image/*"
    putExtra(Intent.EXTRA_STREAM, Uri.parse(imagePath))
}
context?.startActivity(Intent.createChooser(shareIntent, null))

别忘了要求android.permission.WRITE_EXTERNAL_storage没有写外部存储的解决方案吗？添加一些描述以回答清楚的理解@lalit BaghelIt工作，但也存储图像。所以，这一形象在《勇敢》中也有所体现。我怎样才能避免保存图像或将其显示到gallary中。@JaydipKalkani我也需要这个，但也许我们不能。我认为这可能是最好的解决方案，一步一步详细解释。如果出于安全考虑，与缓存中存储的图像共享会更好。我错过了添加xml和provider的一步，所以它不起作用，但最终按照这些步骤进行操作，它现在可以工作了。通过internet通过电子邮件共享的最佳解决方案。自Android X以来，文件提供商的新包名为：androidx.core.content.FileProvider
。