如何使用url中的共享图像方法

Question

目前，我正在使用Picasso库下载图像并将其保存在设备中，并与外部用户共享，问题是当我按下共享按钮时，它不起作用，并将我发送到mainActivity。那么我该怎么修呢？这是我的代码

我用来共享图像的方法

public class PicassoDisplayImageAdapter extends AppCompatActivity {
Button share_image;
ImageView imageView ;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_display_image);
/* button to share image */
share_image = findViewById(R.id.button_share);
imageView = findViewById(R.id.image_display);
share_image.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onShareItem(imageView);
}
});
}
// Can be triggered by a view event such as a button press
public void onShareItem(View v) {
// Get access to bitmap image from view
ImageView ivImage = findViewById(R.id.image_display);
// Get access to the URI for the bitmap
Uri bmpUri = getLocalBitmapUri(ivImage);
if (bmpUri != null) {
// Construct a ShareIntent with link to image
Intent shareIntent = new Intent();
shareIntent.setAction(Intent.ACTION_SEND);
shareIntent.putExtra(Intent.EXTRA_STREAM, bmpUri);
shareIntent.setType("image/*");
// Launch sharing dialog for image
startActivity(Intent.createChooser(shareIntent, "Share Image"));
} else {
// ...sharing failed, handle error
}
}
// Returns the URI path to the Bitmap displayed in specified ImageView
public Uri getLocalBitmapUri(ImageView imageView) {
// Extract Bitmap from ImageView drawable
Drawable drawable = imageView.getDrawable();
Bitmap bmp = null;
if (drawable instanceof BitmapDrawable){
bmp = ((BitmapDrawable) imageView.getDrawable()).getBitmap();
} else {
return null;
}
// Store image to default external storage directory
Uri bmpUri = null;
try {
File file =  new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_DOWNLOADS), "share_image_" + System.currentTimeMillis() + ".png");
file.getParentFile().mkdirs();
FileOutputStream out = new FileOutputStream(file);
bmp.compress(Bitmap.CompressFormat.PNG, 90, out);
out.close();
bmpUri = Uri.fromFile(file);
} catch (IOException e) {
e.printStackTrace();
}
return bmpUri;
}
}

所有活动PicassoDisplayImageAdapter

/*
* This class for display the image when click on it
* It is get the data from the class have the images "Images in ArrayList"
*/
public class PicassoDisplayImageAdapter extends AppCompatActivity {
public static final int PERMISSION_WRITE = 0;
Button download_image,back_icon,share_image;
ImageView imageView ;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_display_image);
/* make the app support only arabic "Right to left" */
// even if the language of the device on english or others
ViewCompat.setLayoutDirection(getWindow().getDecorView(),ViewCompat.LAYOUT_DIRECTION_RTL);
/* Display the data in the ImageView with Picasso "ImageView that insert in he activity" */
imageView = findViewById(R.id.image_display);
final Intent intent = getIntent();
if (intent.hasExtra("imageUrl")){
String url = intent.getStringExtra("imageUrl");
Picasso
.with(this)
.load(url)
.error(R.drawable.error)
.into(imageView);
}
/* to zoom in image like Instagram */
Zoomy.Builder builder = new Zoomy.Builder(this).target(imageView);
builder.register();
/* button to download the image */
download_image = findViewById(R.id.button_download);
checkPermission();
download_image.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (checkPermission()) {
String URL = intent.getStringExtra("imageUrl");
/* to get image name from url */
URI uri = null;
try {
uri = new URI(URL );
} catch (URISyntaxException e) {
e.printStackTrace();
}
URL videoUrl = null;
try {
videoUrl = uri.toURL();
} catch (MalformedURLException e) {
e.printStackTrace();
}
File tempFile = new File(videoUrl.getFile());
String fileName = tempFile.getName();
saveMyImage ("تطبيق المؤمن",URL,fileName);
}
}
});
/* button to share image */
share_image = findViewById(R.id.button_share);
share_image.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onShareItem(imageView);
}
});
/* button to back to last activity*/
back_icon = findViewById(R.id.button_back);
back_icon.setOnClickListener(new View.OnClickListener() {
// The code in this method will be executed when the family category is clicked on.
@Override
public void onClick(View view) {
finish();
}
});
}
// load Bitmap to method save image
private static Bitmap loadBitmap(String url) {
try {
InputStream in = new java.net.URL(url).openStream();
return BitmapFactory.decodeStream(in);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
// Can be triggered by a view event such as a button press
public void onShareItem(View v) {
// Get access to bitmap image from view
ImageView ivImage = findViewById(R.id.image_display);
// Get access to the URI for the bitmap
Uri bmpUri = getLocalBitmapUri(ivImage);
if (bmpUri != null) {
// Construct a ShareIntent with link to image
Intent shareIntent = new Intent();
shareIntent.setAction(Intent.ACTION_SEND);
shareIntent.putExtra(Intent.EXTRA_STREAM, bmpUri);
shareIntent.setType("image/*");
// Launch sharing dialog for image
startActivity(Intent.createChooser(shareIntent, "Share Image"));
} else {
// ...sharing failed, handle error
}
}
// Returns the URI path to the Bitmap displayed in specified ImageView
public Uri getLocalBitmapUri(ImageView imageView) {
// Extract Bitmap from ImageView drawable
Drawable drawable = imageView.getDrawable();
Bitmap bmp = null;
if (drawable instanceof BitmapDrawable){
bmp = ((BitmapDrawable) imageView.getDrawable()).getBitmap();
} else {
return null;
}
// Store image to default external storage directory
Uri bmpUri = null;
try {
File file =  new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_DOWNLOADS), "share_image_" + System.currentTimeMillis() + ".png");
file.getParentFile().mkdirs();
FileOutputStream out = new FileOutputStream(file);
bmp.compress(Bitmap.CompressFormat.PNG, 90, out);
out.close();
bmpUri = Uri.fromFile(file);
} catch (IOException e) {
e.printStackTrace();
}
return bmpUri;
}
/* method to save image*/
void saveMyImage (String appName, String imageUrl, String imageName) {
Bitmap bmImg = loadBitmap(imageUrl);
File filename;
try {
String path1 = Environment.getExternalStorageDirectory()
.toString();
File file = new File(path1 + "/" + appName);
if (!file.exists())
file.mkdirs();
filename = new File(file.getAbsolutePath() + "/" + imageName
+ ".jpg");
FileOutputStream out = new FileOutputStream(filename);
bmImg.compress(Bitmap.CompressFormat.JPEG, 100, out);
out.flush();
out.close();
ContentValues image = new ContentValues();
image.put(Images.Media.TITLE, appName);
image.put(Images.Media.DISPLAY_NAME, imageName);
image.put(Images.Media.DESCRIPTION, "App Image");
image.put(Images.Media.DATE_ADDED, System.currentTimeMillis());
image.put(Images.Media.MIME_TYPE, "image/jpg");
image.put(Images.Media.ORIENTATION, 0);
File parent = filename.getParentFile();
image.put(Images.ImageColumns.BUCKET_ID, parent.toString()
.toLowerCase().hashCode());
image.put(Images.ImageColumns.BUCKET_DISPLAY_NAME, parent.getName()
.toLowerCase());
image.put(Images.Media.SIZE, filename.length());
image.put(Images.Media.DATA, filename.getAbsolutePath());
Uri result = getContentResolver().insert(
Images.Media.EXTERNAL_CONTENT_URI, image);
Toasty.normal(getApplicationContext(), "تم حفظ الصورة في مجلد تطبيق المؤمن", Toast.LENGTH_LONG).show();
} catch (Exception e) {
e.printStackTrace();
}
}
/* runtime storage permission */
public boolean checkPermission() {
int READ_EXTERNAL_PERMISSION = ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE);
if((READ_EXTERNAL_PERMISSION != PackageManager.PERMISSION_GRANTED)) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, PERMISSION_WRITE);
return false;
}
return true;
}
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode==PERMISSION_WRITE && grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
//do somethings
}
}
}

Answer 1

试试这个

/* button to share image */
share_image = findViewById(R.id.button_share);
share_image.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
BitmapDrawable bitmapDrawable = ((BitmapDrawable) imageView.getDrawable());
Bitmap bitmap = bitmapDrawable .getBitmap();
String bitmapPath = Images.Media.insertImage(getContentResolver(),bitmap,"hello bro",null);
Uri bitmapUri = Uri.parse(bitmapPath);
Intent shareIntent=new Intent(Intent.ACTION_SEND);
shareIntent.setType("image/jpeg");
shareIntent.putExtra(Intent.EXTRA_STREAM, bitmapUri);
startActivity(Intent.createChooser(shareIntent,"Share Image"));
}
});