我想使用代码分享一张图片：
Intent sharingIntent = new Intent(Intent.ACTION_SEND);
Uri imageUri = Uri.parse("http://stacktoheap.com/images/stackoverflow.png");
sharingIntent.setType("image/png");
sharingIntent.putExtra(Intent.EXTRA_STREAM, imageUri);
startActivity(sharingIntent);
我做了一个按钮来调用上面的代码。共享意图打开，但如果我单击“通过彩信共享”，我得到了：“无法将此图片添加到您的消息中”。如果 Facebook 我只有一个没有我的图片的文本区域。
【问题讨论】：
不需要使用 ImageView 的 @eclass 答案的改编版本：
使用Picasso 将网址加载到位图中
public void shareItem(String url) {
Picasso.with(getApplicationContext()).load(url).into(new Target() {
@Override public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
Intent i = new Intent(Intent.ACTION_SEND);
i.setType("image/*");
i.putExtra(Intent.EXTRA_STREAM, getLocalBitmapUri(bitmap));
startActivity(Intent.createChooser(i, "Share Image"));
}
@Override public void onBitmapFailed(Drawable errorDrawable) { }
@Override public void onPrepareLoad(Drawable placeHolderDrawable) { }
});
}
将位图转换为 Uri
public Uri getLocalBitmapUri(Bitmap bmp) {
Uri bmpUri = null;
try {
File file = new File(getExternalFilesDir(Environment.DIRECTORY_PICTURES), "share_image_" + System.currentTimeMillis() + ".png");
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;
}
【讨论】：
_context.getExternalFilesDir().. 谢谢。
bmpUri 应该是FileProvider.getUriForFile(context, context.getPackageName() + ".provider", file);
我使用来自this tutorial的这些代码
final ImageView imgview= (ImageView)findViewById(R.id.feedImage1);
Uri bmpUri = getLocalBitmapUri(imgview);
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
}
然后将其添加到您的活动中
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;
}
然后添加您的应用程序清单
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
【讨论】：
Context.getExternalFilesDir()，你不需要权限:)
您需要使用本地文件。像这样：
Uri imageUri = Uri.parse("android.resource://your.package/drawable/fileName");
Intent intent = new Intent(Intent.ACTION_SEND);
intent.setType("image/png");
intent.putExtra(Intent.EXTRA_STREAM, imageUri);
startActivity(Intent.createChooser(intent , "Share"));
如果您的图像在远程服务器上，请先将其下载到设备。
【讨论】：
试试这个：
new OmegaIntentBuilder(context)
.share()
.filesUrls("http://stacktoheap.com/images/stackoverflow.png")
.download(new DownloadCallback() {
@Override
public void onDownloaded(boolean success, @NotNull ContextIntentHandler contextIntentHandler) {
contextIntentHandler.startActivity();
}
});
【讨论】：
经过大量思考，这是我发现为我工作的代码！我认为这是使用毕加索完成给定任务的最简单的代码版本之一。无需创建 ImageView 对象。
Target target = new Target() {
@Override
public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
bmp = bitmap;
String path = MediaStore.Images.Media.insertImage(getContentResolver(), bmp, "SomeText", null);
Log.d("Path", path);
Intent intent = new Intent(Intent.ACTION_SEND);
intent.putExtra(Intent.EXTRA_TEXT, "Hey view/download this image");
Uri screenshotUri = Uri.parse(path);
intent.putExtra(Intent.EXTRA_STREAM, screenshotUri);
intent.setType("image/*");
startActivity(Intent.createChooser(intent, "Share image via..."));
}
@Override
public void onBitmapFailed(Drawable errorDrawable) {
}
@Override
public void onPrepareLoad(Drawable placeHolderDrawable) {
}
};
String url = "http://efdreams.com/data_images/dreams/face/face-03.jpg";
Picasso.with(getApplicationContext()).load(url).into(target);
在这里，bmp 是一个类级别的位图变量，而 url 将是用于共享的图像的动态 Internet url。此外，除了将要共享的代码保留在 onBitmapLoaded() 函数中，它还可以保留在另一个处理函数中，然后从 onBitmapLoaded() 函数中调用。希望这会有所帮助！
【讨论】：
首先您需要在滑行中加载图像。然后，您可以将其分享到任何地方。 从 glide 加载图像的代码（图像正在保存到存储中，您可以稍后将其删除）。
Glide.with(getApplicationContext())
.load(imagelink)\\ link of your image file(url)
.asBitmap().skipMemoryCache(true).diskCacheStrategy(DiskCacheStrategy.NONE)
.into(new SimpleTarget < Bitmap > (250, 250) {
@Override
public void onResourceReady(Bitmap resource, GlideAnimation glideAnimation) {
Intent intent = new Intent(Intent.ACTION_SEND);
intent.putExtra(Intent.EXTRA_TEXT, "Hey view/download this image");
String path = MediaStore.Images.Media.insertImage(getContentResolver(), resource, "", null);
Log.i("quoteswahttodo", "is onresoursereddy" + path);
Uri screenshotUri = Uri.parse(path);
Log.i("quoteswahttodo", "is onresoursereddy" + screenshotUri);
intent.putExtra(Intent.EXTRA_STREAM, screenshotUri);
intent.setType("image/*");
startActivity(Intent.createChooser(intent, "Share image via..."));
}
@Override
public void onLoadFailed(Exception e, Drawable errorDrawable) {
Toast.makeText(getApplicationContext(), "Something went wrong", Toast.LENGTH_SHORT).show();
super.onLoadFailed(e, errorDrawable);
}
@Override
public void onLoadStarted(Drawable placeholder) {
Toast.makeText(getApplicationContext(), "Starting", Toast.LENGTH_SHORT).show();
super.onLoadStarted(placeholder);
}
});
【讨论】：
share.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
int permissionCheck = ContextCompat.checkSelfPermission(SingleProduct.this,
Manifest.permission.READ_EXTERNAL_STORAGE);
if (permissionCheck == PackageManager.PERMISSION_GRANTED) {
Log.e("MainActivity ", "P granted");
bmpUri = getLocalBitmapUri(imageView);
} else {
ActivityCompat.requestPermissions(SingleProduct.this,
new String[]{Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
}
} else {
Log.e("MainActivity", "Lower Than MarshMallow");
bmpUri = getLocalBitmapUri(imageView);
}
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.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
shareIntent.setType("image/*");
startActivity(Intent.createChooser(shareIntent, "Share Image"));
} else {
Toast.makeText(SingleProduct.this, "Sharing Failed !!", Toast.LENGTH_SHORT).show();
}
}
});
public Uri getLocalBitmapUri(ImageView imageView) {
Drawable drawable = imageView.getDrawable();
Bitmap bmp = null;
if (drawable instanceof BitmapDrawable) {
bmp = ((BitmapDrawable) imageView.getDrawable()).getBitmap();
} else {
return null;
}
Uri bmpUri = null;
try {
File file = new File(getExternalFilesDir(Environment.DIRECTORY_PICTURES), "share_image_" + System.currentTimeMillis() + ".png");
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;
}
//for oreo add below code in manifest under application tag
<provider
android:name=".utility.GenericFileProvider"
android:authorities="${applicationId}.your package
name.utility.GenericFileProvider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/provider_paths" />
</provider>
create class that extends FileProvider
public class MyFileProvider extends FileProvider {
}
for oreo add this code
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
bmpUri = FileProvider.getUriForFile(this,
this.getApplicationContext().getPackageName() +
".your package name.GenericFileProvider", file);
} else {
bmpUri = Uri.fromFile(file);
}
finally add provider_paths.xml in res/xml
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="external_files" path="."/>
</paths>
就是这样
【讨论】：
在这里，我使用 asyncTask 将 url 转换为 imageView 并将其存储到位图中。
不要忘记在清单中添加互联网权限。
public class MainActivity extends AppCompatActivity {
@SuppressLint("WrongThread")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button iv1 = findViewById(R.id.shreimage);
final ImageView imgview= (ImageView)findViewById(R.id.content_image);
new DownloadImageTask(imgview).execute("https://sample-videos.com/img/Sample-jpg-image-50kb.jpg");
iv1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Drawable myDrawable = imgview.getDrawable();
Bitmap bitmap = ((BitmapDrawable)myDrawable).getBitmap();
try{
File file = new File(MainActivity.this.getExternalCacheDir(),"myImage.jpeg");
FileOutputStream fout = new FileOutputStream(file);
bitmap.compress(Bitmap.CompressFormat.JPEG,80,fout);
fout.flush();
fout.close();
file.setReadable(true,false);
Intent intent = new Intent(Intent.ACTION_SEND);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.putExtra(Intent.EXTRA_STREAM,Uri.fromFile(file));
intent.setType("image/*");
startActivity(Intent.createChooser(intent,"Share Image Via"));
}catch (FileNotFoundException e){
e.printStackTrace();
Toast.makeText(MainActivity.this,"File Nott Found",Toast.LENGTH_SHORT).show();
}catch (IOException e){
e.printStackTrace();
}catch (Exception e){
e.printStackTrace();
}
}
});
}
private class DownloadImageTask extends AsyncTask<String, Void, Bitmap> {
ImageView bmImage;
public DownloadImageTask(ImageView bmImage) {
this.bmImage = bmImage;
}
protected Bitmap doInBackground(String... urls) {
String urldisplay = urls[0];
Bitmap mIcon11 = null;
try {
InputStream in = new java.net.URL(urldisplay).openStream();
mIcon11 = BitmapFactory.decodeStream(in);
} catch (Exception e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return mIcon11;
}
protected void onPostExecute(Bitmap result) {
bmImage.setImageBitmap(result);
}
}
}
【讨论】：
Picasso.with(applicationContext).load(url).into(object : Target {
override fun onBitmapLoaded(bitmap: Bitmap, from: Picasso.LoadedFrom?) {
val bitmapPath: String =
MediaStore.Images.Media.insertImage(contentResolver, bitmap, "ayurved", null)
val bitmapUri = Uri.parse(bitmapPath)
val shareIntent = Intent(Intent.ACTION_SEND)
shareIntent.type = "image/jpeg";
shareIntent.putExtra(Intent.EXTRA_STREAM, bitmapUri);
startActivity(Intent.createChooser(shareIntent, "ayurved"))
}
override fun onBitmapFailed(errorDrawable: Drawable?) {}
override fun onPrepareLoad(placeHolderDrawable: Drawable?) {}
})
【讨论】：
通过使用 createchooser 你可以做到这一点，
Intent sharingIntent = new Intent(Intent.ACTION_SEND);
Uri screenshotUri = Uri.parse(path);
sharingIntent.setType("image/png");
sharingIntent.putExtra(Intent.EXTRA_STREAM, screenshotUri);
startActivity(Intent.createChooser(sharingIntent, "Share image using"));
注册 Intent
如果您希望在调用此 Intent 时列出您的应用，则必须在 manifest.xml 文件中添加一个 Intent 过滤器
<intent-filter>
<action android:name="android.intent.action.SEND" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="image/*" />
</intent-filter>
【讨论】：