在 Android 的默认图库图像查看器中使用 URI 打开图像

发布于 2024-10-24 20:23:41 字数 102 浏览 1 评论 0 原文

我已经提取了图像 uri,现在我想使用 Android 的默认图像查看器打开图像。或者更好的是,用户可以选择使用什么程序来打开图像。如果您尝试打开文件,则会提供诸如文件资源管理器之类的功能。

I have extracted image uri, now I would like to open image with Android's default image viewer. Or even better, user could choose what program to use to open the image. Something like File Explorers offer you if you try to open a file.

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评论(14

漫雪独思 2024-10-31 20:23:42

对这个问题的一个更清晰、更安全的答案(你真的不应该对字符串进行硬编码):

public void openInGallery(String imageId) {
  Uri uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI.buildUpon().appendPath(imageId).build();
  Intent intent = new Intent(Intent.ACTION_VIEW, uri);
  startActivity(intent);
}

你所要做的就是将图像 id 附加到 EXTERNAL_CONTENT_URI。然后使用 View 操作和 Uri 启动 Intent。

图像 ID 来自查询内容解析器。

A much cleaner, safer answer to this problem (you really shouldn't hard code Strings):

public void openInGallery(String imageId) {
  Uri uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI.buildUpon().appendPath(imageId).build();
  Intent intent = new Intent(Intent.ACTION_VIEW, uri);
  startActivity(intent);
}

All you have to do is append the image id to the end of the path for the EXTERNAL_CONTENT_URI. Then launch an Intent with the View action, and the Uri.

The image id comes from querying the content resolver.

々眼睛长脚气 2024-10-31 20:23:42

以上所有答案均未打开图像。当我第二次尝试打开它时,显示的是图库而不是图像。

我从各种答案的混合中得到了解决方案..

Intent galleryIntent = new Intent(Intent.ACTION_VIEW, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
galleryIntent.setDataAndType(Uri.fromFile(mImsgeFileName), "image/*");
galleryIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(galleryIntent);

这个只对我有用..

All the above answers not opening image.. when second time I try to open it show the gallery not image.

I got solution from mix of various SO answers..

Intent galleryIntent = new Intent(Intent.ACTION_VIEW, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
galleryIntent.setDataAndType(Uri.fromFile(mImsgeFileName), "image/*");
galleryIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(galleryIntent);

This one only worked for me..

原谅过去的我 2024-10-31 20:23:42

使用 Intent.ACTION_VIEW 显示文件的问题是,如果您传递解析路径的 Uri 。并非在所有情况下都有效。要解决该问题,您需要使用:

Uri.fromFile(new File(filePath));

而不是:

Uri.parse(filePath);

Edit

这是我的完整代码:

Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(new File(mediaFile.filePath)), mediaFile.getExtension());
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);

Info

MediaFile 是我用于包装文件的域类来自对象中的数据库。
MediaFile.getExtension() 返回一个 String,其中 Mimetype 作为文件扩展名。示例:"image/png"


其他代码:显示任何文件(扩展名)所需的代码,

import android.webkit.MimeTypeMap;

public String getExtension () {
    MimeTypeMap myMime = MimeTypeMap.getSingleton();
    return myMime.getMimeTypeFromExtension(MediaFile.fileExtension(filePath));
}

public static String fileExtension(String path) {
    if (path.indexOf("?") > -1) {
        path = path.substring(0, path.indexOf("?"));
    }
    if (path.lastIndexOf(".") == -1) {
        return null;
    } else {
        String ext = path.substring(path.lastIndexOf(".") + 1);
        if (ext.indexOf("%") > -1) {
            ext = ext.substring(0, ext.indexOf("%"));
        }
        if (ext.indexOf("/") > -1) {
            ext = ext.substring(0, ext.indexOf("/"));
        }
        return ext.toLowerCase();
    }
}

如果您需要更多代码,请告诉我。

The problem with showing a file using Intent.ACTION_VIEW, is that if you pass the Uri parsing the path. Doesn't work in all cases. To fix that problem, you need to use:

Uri.fromFile(new File(filePath));

Instead of:

Uri.parse(filePath);

Edit

Here is my complete code:

Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(new File(mediaFile.filePath)), mediaFile.getExtension());
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);

Info

MediaFile is my domain class to wrap files from database in objects.
MediaFile.getExtension() returns a String with Mimetype for the file extension. Example: "image/png"


Aditional code: needed for showing any file (extension)

import android.webkit.MimeTypeMap;

public String getExtension () {
    MimeTypeMap myMime = MimeTypeMap.getSingleton();
    return myMime.getMimeTypeFromExtension(MediaFile.fileExtension(filePath));
}

public static String fileExtension(String path) {
    if (path.indexOf("?") > -1) {
        path = path.substring(0, path.indexOf("?"));
    }
    if (path.lastIndexOf(".") == -1) {
        return null;
    } else {
        String ext = path.substring(path.lastIndexOf(".") + 1);
        if (ext.indexOf("%") > -1) {
            ext = ext.substring(0, ext.indexOf("%"));
        }
        if (ext.indexOf("/") > -1) {
            ext = ext.substring(0, ext.indexOf("/"));
        }
        return ext.toLowerCase();
    }
}

Let me know if you need more code.

诗酒趁年少 2024-10-31 20:23:42

我用这个它对我有用

Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent,
"Select Picture"), 1);

I use this it works for me

Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent,
"Select Picture"), 1);
┾廆蒐ゝ 2024-10-31 20:23:42

我使用文件提供程序的解决方案

    private void viewGallery(File file) {

 Uri mImageCaptureUri = FileProvider.getUriForFile(
  mContext,
  mContext.getApplicationContext()
  .getPackageName() + ".provider", file);

 Intent view = new Intent();
 view.setAction(Intent.ACTION_VIEW);
 view.setData(mImageCaptureUri);
 List < ResolveInfo > resInfoList =
  mContext.getPackageManager()
  .queryIntentActivities(view, PackageManager.MATCH_DEFAULT_ONLY);
 for (ResolveInfo resolveInfo: resInfoList) {
  String packageName = resolveInfo.activityInfo.packageName;
  mContext.grantUriPermission(packageName, mImageCaptureUri, Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION);
 }
 view.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
 Intent intent = new Intent();
 intent.setAction(Intent.ACTION_VIEW);
 intent.setDataAndType(mImageCaptureUri, "image/*");
 mContext.startActivity(intent);
}

My solution using File Provider

    private void viewGallery(File file) {

 Uri mImageCaptureUri = FileProvider.getUriForFile(
  mContext,
  mContext.getApplicationContext()
  .getPackageName() + ".provider", file);

 Intent view = new Intent();
 view.setAction(Intent.ACTION_VIEW);
 view.setData(mImageCaptureUri);
 List < ResolveInfo > resInfoList =
  mContext.getPackageManager()
  .queryIntentActivities(view, PackageManager.MATCH_DEFAULT_ONLY);
 for (ResolveInfo resolveInfo: resInfoList) {
  String packageName = resolveInfo.activityInfo.packageName;
  mContext.grantUriPermission(packageName, mImageCaptureUri, Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION);
 }
 view.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
 Intent intent = new Intent();
 intent.setAction(Intent.ACTION_VIEW);
 intent.setDataAndType(mImageCaptureUri, "image/*");
 mContext.startActivity(intent);
}
夜无邪 2024-10-31 20:23:42

几乎没有机会使用照片或图库应用程序(可能存在),但您可以尝试内容查看器。

请在此处查看类似问题的另一个答案

Almost NO chance to use photo or gallery application(might exist one), but you can try the content-viewer.

Please checkout another answer to similar question here

看透却不说透 2024-10-31 20:23:42

我的解决方案

Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(new File(Environment.getExternalStorageDirectory().getPath()+"/your_app_folder/"+"your_picture_saved_name"+".png")), "image/*");
context.startActivity(intent);

My solution

Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(new File(Environment.getExternalStorageDirectory().getPath()+"/your_app_folder/"+"your_picture_saved_name"+".png")), "image/*");
context.startActivity(intent);
绿阴红影里的.如风往事 2024-10-31 20:23:42

uri 必须是内容 uri 而不是文件 uri,
您可以通过 FileProvider 获取 contentUri,因为

Uri contentUri = FileProvider.getUriForFile(getContext(),"com.github.myApp",curFile);

不要忘记在 Manifest 文件中添加提供程序。

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

The uri must be content uri not file uri,
You can get contentUri by FileProvider as

Uri contentUri = FileProvider.getUriForFile(getContext(),"com.github.myApp",curFile);

Don't forget adding provider in Manifest file.

<provider
        android:name="androidx.core.content.FileProvider"
        android:authorities="com.github.myApp"
        android:exported="false"
        android:grantUriPermissions="true">
        <meta-data
            android:name="android.support.FILE_PROVIDER_PATHS"
            android:resource="@xml/provider_paths" />
</provider>
相权↑美人 2024-10-31 20:23:41

接受的答案对我不起作用,

什么有效:

Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.parse("file://" + "/sdcard/test.jpg"), "image/*");
startActivity(intent);

Accepted answer was not working for me,

What had worked:

Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.parse("file://" + "/sdcard/test.jpg"), "image/*");
startActivity(intent);
望她远 2024-10-31 20:23:41

如果您的应用程序面向 Android N (7.0) 及更高版本,则不应使用上面的答案(“Uri.fromFile”方法),因为它不适合您。

相反,您应该使用 ContentProvider。

例如,如果您的图像文件位于外部文件夹中,您可以使用它(类似于我在此处< /strong>) :

File file = ...;
final Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(VERSION.SDK_INT >= VERSION_CODES.N ? FileProvider.getUriForFile(this,getPackageName() + ".provider", file) : Uri.fromFile(file), "image/*");
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
startActivity(intent);

ma​​nifest:

<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>

res/xml/provider_paths.xml :

<?xml version="1.0" encoding="utf-8"?>
<paths>
    <!--<external-path name="external_files" path="."/>-->
    <external-path
        name="files_root"
        path="Android/data/${applicationId}"/>
    <external-path
        name="external_storage_root"
        path="."/>
</paths>

如果您的图像位于应用程序的私有路径中,您应该创建自己的 ContentProvider,就像我创建的那样链接上的“OpenFileProvider”。

If your app targets Android N (7.0) and above, you should not use the answers above (of the "Uri.fromFile" method), because it won't work for you.

Instead, you should use a ContentProvider.

For example, if your image file is in external folder, you can use this (similar to the code I've made here) :

File file = ...;
final Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(VERSION.SDK_INT >= VERSION_CODES.N ? FileProvider.getUriForFile(this,getPackageName() + ".provider", file) : Uri.fromFile(file), "image/*");
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
startActivity(intent);

manifest:

<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>

res/xml/provider_paths.xml :

<?xml version="1.0" encoding="utf-8"?>
<paths>
    <!--<external-path name="external_files" path="."/>-->
    <external-path
        name="files_root"
        path="Android/data/${applicationId}"/>
    <external-path
        name="external_storage_root"
        path="."/>
</paths>

If your image is in the private path of the app, you should create your own ContentProvider, as I've created "OpenFileProvider" on the link.

無心 2024-10-31 20:23:41

问我自己,也回答我自己:

startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("content://media/external/images/media/16"))); /** replace with your own uri */

它还会询问使用什么程序来查看该文件。

Ask myself, answer myself also:

startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("content://media/external/images/media/16"))); /** replace with your own uri */

It will also ask what program to use to view the file.

So尛奶瓶 2024-10-31 20:23:41

尝试使用它:

Uri uri =  Uri.fromFile(entry);
Intent intent = new Intent(android.content.Intent.ACTION_VIEW);
String mime = "*/*";
MimeTypeMap mimeTypeMap = MimeTypeMap.getSingleton();
if (mimeTypeMap.hasExtension(
    mimeTypeMap.getFileExtensionFromUrl(uri.toString())))
    mime = mimeTypeMap.getMimeTypeFromExtension(
        mimeTypeMap.getFileExtensionFromUrl(uri.toString()));
intent.setDataAndType(uri,mime);
startActivity(intent);

Try use it:

Uri uri =  Uri.fromFile(entry);
Intent intent = new Intent(android.content.Intent.ACTION_VIEW);
String mime = "*/*";
MimeTypeMap mimeTypeMap = MimeTypeMap.getSingleton();
if (mimeTypeMap.hasExtension(
    mimeTypeMap.getFileExtensionFromUrl(uri.toString())))
    mime = mimeTypeMap.getMimeTypeFromExtension(
        mimeTypeMap.getFileExtensionFromUrl(uri.toString()));
intent.setDataAndType(uri,mime);
startActivity(intent);
携君以终年 2024-10-31 20:23:41

基于 Vikas 答案,但略有修改: Uri 通过参数接收:

private void showPhoto(Uri photoUri){
    Intent intent = new Intent();
    intent.setAction(Intent.ACTION_VIEW);
    intent.setDataAndType(photoUri, "image/*");
    startActivity(intent);
}

Based on Vikas answer but with a slight modification: The Uri is received by parameter:

private void showPhoto(Uri photoUri){
    Intent intent = new Intent();
    intent.setAction(Intent.ACTION_VIEW);
    intent.setDataAndType(photoUri, "image/*");
    startActivity(intent);
}
相守太难 2024-10-31 20:23:41

如果您使用 Android N 及以下版本,这可能会有所帮助

 File file=new File(Environment.getExternalStorageDirectory()+"/directoryname/"+filename);
        Uri path= FileProvider.getUriForFile(MainActivity.this,BuildConfig.APPLICATION_ID + ".provider",file);

        Intent intent=new Intent(Intent.ACTION_VIEW);
        intent.setDataAndType(path,"image/*");
        intent.setFlags(FLAG_GRANT_READ_URI_PERMISSION | FLAG_GRANT_WRITE_URI_PERMISSION); //must for reading data from directory

This thing might help if your working with android N and below

 File file=new File(Environment.getExternalStorageDirectory()+"/directoryname/"+filename);
        Uri path= FileProvider.getUriForFile(MainActivity.this,BuildConfig.APPLICATION_ID + ".provider",file);

        Intent intent=new Intent(Intent.ACTION_VIEW);
        intent.setDataAndType(path,"image/*");
        intent.setFlags(FLAG_GRANT_READ_URI_PERMISSION | FLAG_GRANT_WRITE_URI_PERMISSION); //must for reading data from directory
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