安卓：URI开放的用行动显示图像 [英] Android : URI for open an image with ACTION View

问题描述

这是在code

protected static final String DIR_IMAGE = "/data/data/it.android.myprogram/images/";
Intent intent = new Intent(); 
intent.setAction(android.content.Intent.ACTION_VIEW); 
Uri u = Uri.fromFile(destinationFile);
intent.setDataAndType(u, "image/*");
startActivity(intent); 

要打开该文件是为/data/data/it.android.myprogram/images如果我这样做：

the file to open is into /data/data/it.android.myprogram/images if I do :

File dir = new File(DIR_IMAGE);
String[] files = dir.list();

var这个文件中包含的所有文件，但是当我开始

The var files contain all files but when I start

intent.setDataAndType(u, "image/*");
startActivity(intent); 

据dispaly消息不可能找到/data/data/it.android.myprogram/images/img1.jpg

It dispaly the message Impossible to find /data/data/it.android.myprogram/images/img1.jpg

为什么？

推荐答案

文件只能由您的应用程序访问。如果你想通过他们的意图发送给其他人的应用程序，你必须使用你的活动 openFileOutput 方法复制的内容。

Files in /data/data/it.android.myprogram are only accessible by your application. If you want to send them via Intent to others applications, you must copy content in using openFileOutput method of your activity.

protected static final String DIR_IMAGE = "/data/data/it.android.myprogram/images/";
String filePath = DIR_IMAGE + "fileName";
FileInputStream fileInputStream = new FileInputStream(new File(filePath));
FileOutputStream fileOutputStream = openFileOutput("fileName", Activity.MODE_WORLD_READABLE);
ByteStreams.copy(fileInputStream, fileOutputStream);
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.parse("content://it.android.myprogram/fileName"), "image/*");

希望它可以帮助

Hope it helps

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