public void uploadpicture(View view)
{
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);
Toast.makeText(this,selectedImagePath,Toast.LENGTH_SHORT).show();
Log.i("selectedImagePath",selectedImagePath.trim());
}
}
}
我从日志猫那里得到了这个:
05-24 15:57:51.054: E/AndroidRuntime(18016): FATAL EXCEPTION: main
05-24 15:57:51.054: E/AndroidRuntime(18016): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=Intent { dat=content://com.android.sec.gallery3d.provider/picasa/item/5147009501910019474 }} to activity {ncpl.talentapp/ncpl.talentapp.SignUp}: java.lang.NullPointerException
05-24 15:57:51.054: E/AndroidRuntime(18016): at android.app.ActivityThread.deliverResults(ActivityThread.java:2821)
05-24 15:57:51.054: E/AndroidRuntime(18016): at android.app.ActivityThread.handleSendResult(ActivityThread.java:2864)
05-24 15:57:51.054: E/AndroidRuntime(18016): at android.app.ActivityThread.access$1000(ActivityThread.java:122)
05-24 15:57:51.054: E/AndroidRuntime(18016): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1057)
05-24 15:57:51.054: E/AndroidRuntime(18016): at android.os.Handler.dispatchMessage(Handler.java:99)
05-24 15:57:51.054: E/AndroidRuntime(18016): at android.os.Looper.loop(Looper.java:132)
05-24 15:57:51.054: E/AndroidRuntime(18016): at android.app.ActivityThread.main(ActivityThread.java:4126)
05-24 15:57:51.054: E/AndroidRuntime(18016): at java.lang.reflect.Method.invokeNative(Native Method)
05-24 15:57:51.054: E/AndroidRuntime(18016): at java.lang.reflect.Method.invoke(Method.java:491)
05-24 15:57:51.054: E/AndroidRuntime(18016): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:844)
05-24 15:57:51.054: E/AndroidRuntime(18016): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)
05-24 15:57:51.054: E/AndroidRuntime(18016): at dalvik.system.NativeStart.main(Native Method)
05-24 15:57:51.054: E/AndroidRuntime(18016): Caused by: java.lang.NullPointerException
从您的日志来看,您似乎正在尝试从 Picasa 文件夹中选取图像 dat=content://com.android.sec.gallery3d.provider/picasa/item/5147009501910019474
,并且必须以不同的方式处理这些图像,因为MediaStore.Images.Media.DATA
列中的数据对它们来说将为空。您可以在此链接中了解如何正确处理从 Picasa 中挑选图像:
http://dimitar.me/how-to-get-picasa-images-using-the-image-picker-on-android-devices-running-any-os-version/
只有您还需要处理以"content://com.sec.android.gallery3d"开头的 URI(我在三星 S3 上看到这个),因此请更改
if (selectedImage.toString().startsWith("content://com.google.android.gallery3d"))
自
if (_selectedImage.toString().startsWith("content://com.google.android.gallery3d")
|| selectedImage.toString().startsWith("content://com.sec.android.gallery3d"))
我不确定是否还有其他特殊情况(可能是的)。
我遇到了同样的问题,并尝试根据网站 user1682516 推荐来实现它。我把头撞在墙上,因为我的Picasa内容URL不太匹配:我的看起来像"com.sec.android.gallery3d.provider"而不是"com.android.gallery3d.provider",但无论我是否更改URL,似乎都不起作用。
然后,当我最终意识到我用于在我的应用程序中为 ImageView 加载远程图像的库 https://github.com/nostra13/Android-Universal-Image-Loader 为我处理这个问题时,我感到很愚蠢。我可以使用适当的参数调用 ImageLoader.getInstance().loadImage(),并在回调中获取位图。我不需要担心它是本地图像、远程 Picasa 图像还是普通的远程图像——这对我来说是有问题的。希望我几个小时前就想通了!
三星SM-A520F上测试。如果您只想从图库中选择本地图像,则有效:
fun uploadpicture(view: View?) {
val intent = Intent()
intent.type = "image/*"
intent.action = Intent.ACTION_GET_CONTENT
intent.putExtra(Intent.EXTRA_LOCAL_ONLY, true) // Restrict choice
startActivityForResult(Intent.createChooser(intent,
"Select Picture"), SELECT_PICTURE)
}
在这里测试代码
public class SelectPhotoActivity extends Activity {
private static final int SELECT_PICTURE = 1;
private String selectedImagePath="";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivityForResult(intent, SELECT_PICTURE);
}
public String getPath(Uri uri) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
int column_index = cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data)
{
if (resultCode == RESULT_OK) {
if (requestCode == SELECT_PICTURE)
{
Uri selectedImageUri = data.getData();
selectedImagePath = getPath(selectedImageUri);
// here you can set the image
}
}
}
}