问题描述
我试图推出其写入我的应用程序目录中内置的Android的图像浏览器的图像。这个图像已经写在该应用该应用目录的不同部分。当得到以下文件:
I'm trying to launch an image which is written to my application directory with the builtin Android image viewer. This image has been written in a different part of the app to the app directory. When getting the following file:
super.getFilesDir()+/current.png
File.exists()返回true。
File.exists() returns true.
我如何可以启动内置的Android的图像查看器来查看此文件?目前我在做什么:
How can i launch the builtin Android image viewer to view this file?Currently i'm doing:
File f = new File(super.getFilesDir()+"/current.png");
uri = Uri.parse("file://"+super.getFilesDir()+"/current.png");
startActivity(new Intent(Intent.ACTION_VIEW, uri));
和它不断搅动了:
10-11 13:09:24.367: 信息/ ActivityManager(564):启动 活动:意向{ ACT = android.intent.action.VIEW DAT =文件:///data/data/com.davidgoemans.myapp/files/current.png 10月11日} 13:09:24.367: 错误/ MyApp的(2166):异常 occuredandroid.content.ActivityNotFoundException: 无活动来处理意向{ ACT = android.intent.action.VIEW DAT =文件:///data/data/com.davidgoemans.myapp/files/current.png }
无论什么我更改URI架构。(如:内容://,文件://,媒体://,图像://)
irrespective of what i change the uri schema to ( eg, content://, file://, media://, image:// ).
推荐答案
一种方法是实现一个上下文提供给其他应用程序访问您的数据。
One way is to implement a context provider to give other applications access to your data.
创建包含一个新的类:
public class FileContentProvider extends ContentProvider {
private static final String URI_PREFIX = "content://uk.co.ashtonbrsc.examplefilecontentprovider";
public static String constructUri(String url) {
Uri uri = Uri.parse(url);
return uri.isAbsolute() ? url : URI_PREFIX + url;
}
@Override
public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException {
File file = new File(uri.getPath());
ParcelFileDescriptor parcel = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY);
return parcel;
}
@Override
public boolean onCreate() {
return true;
}
@Override
public int delete(Uri uri, String s, String[] as) {
throw new UnsupportedOperationException("Not supported by this provider");
}
@Override
public String getType(Uri uri) {
throw new UnsupportedOperationException("Not supported by this provider");
}
@Override
public Uri insert(Uri uri, ContentValues contentvalues) {
throw new UnsupportedOperationException("Not supported by this provider");
}
@Override
public Cursor query(Uri uri, String[] as, String s, String[] as1, String s1) {
throw new UnsupportedOperationException("Not supported by this provider");
}
@Override
public int update(Uri uri, ContentValues contentvalues, String s, String[] as) {
throw new UnsupportedOperationException("Not supported by this provider");
}
}
添加内容提供商到您的AndroidManifest.xml:
Add the content provider to your AndroidManifest.xml:
<provider android:name=".FileContentProvider" android:authorities="uk.co.ashtonbrsc.examplefilecontentprovider" />
您应该然后就可以使用内容://uk.co.ashtonbrsc.examplefilecontentprovider/+的完整路径图像
在ACTION_VIEW意图
You should then be able to use "content://uk.co.ashtonbrsc.examplefilecontentprovider/" + the full path to the image
in your ACTION_VIEW intent.
这篇关于从应用程序的Android图像浏览器的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!