获取/选择从Android的内置库的应用程序图像编程 [英] Get/pick an image from Android's built-in Gallery app programmatically
问题描述
我想打开图像/照片在内置的应用程序，从我的应用程序内的美术馆。
I am trying to open an image / picture in the Gallery built-in app from inside my application.
我有图片的URI（图片所在的SD卡上）。
I have a URI of the picture (the picture is located on the SD card).
你有什么建议吗？
推荐答案
这是一个完整的解决方案。我刚刚更新了这个例子code与@mad提供了答案下面的信息。另外从@Khobaib检查下面的解决方案，说明如何处理与Picasa图片。
This is a complete solution. I've just updated this example code with the information provided in the answer below by @mad. Also check the solution below from @Khobaib explaining how to deal with picasa images.
我只是回顾我原来的答复，并创建了一个简单的Android Studio项目，你可以从github上，并直接导入你的系统中检出。
I've just reviewed my original answer and created a simple Android Studio project you can checkout from github and import directly on your system.
https://github.com/hanscappelle/SO-2169649
（注意，多个文件选择仍需要工作）的
通过从文件探险得益于图像的支持用户的疯狂。
With support for images from file explorers thanks to user mad.
public class BrowsePictureActivity extends Activity {
// this is the action code we use in our intent,
// this way we know we're looking at the response from our own action
private static final int SELECT_PICTURE = 1;
private String selectedImagePath;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
findViewById(R.id.Button01)
.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
// in onCreate or any event where your want the user to
// select a file
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent,
"Select Picture"), SELECT_PICTURE);
}
});
}
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
if (requestCode == SELECT_PICTURE) {
Uri selectedImageUri = data.getData();
selectedImagePath = getPath(selectedImageUri);
}
}
}
/**
* helper to retrieve the path of an image URI
*/
public String getPath(Uri uri) {
// just some safety built in
if( uri == null ) {
// TODO perform some logging or show user feedback
return null;
}
// try to retrieve the image from the media store first
// this will only work for images selected from gallery
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
if( cursor != null ){
int column_index = cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
// this is our fallback here
return uri.getPath();
}
}
选择多张照片
由于有人要求在评论这些信息，并最好有收集的信息。
Selecting Multiple Pictures
Since someone requested that information in a comment and it's better to have information gathered.
设置上的意图的额外参数 EXTRA_ALLOW_MULTIPLE ：
Set an extra parameter EXTRA_ALLOW_MULTIPLE on the intent:
intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
而在处理结果检查该参数：
And in the Result handling check for that parameter:
if (Intent.ACTION_SEND_MULTIPLE.equals(data.getAction()))
&& Intent.hasExtra(Intent.EXTRA_STREAM)) {
// retrieve a collection of selected images
ArrayList<Parcelable> list = intent.getParcelableArrayListExtra(Intent.EXTRA_STREAM);
// iterate over these images
if( list != null ) {
for (Parcelable parcel : list) {
Uri uri = (Uri) parcel;
// TODO handle the images one by one here
}
}
}
请注意，这只是支持的API级别18 +。
Note that this is only supported by API level 18+.
这篇关于获取/选择从Android的内置库的应用程序图像编程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IT屋！
