Android的获取图像从画廊到的ImageView

问题描述

我真的试图从galery将照片添加到ImageView的，但我得到这个错误：

I`m trying to add a photo from galery to a ImageView but I get this error:

java.lang.RuntimeException的：不提供结果  ResultInfo {谁= NULL，请求= 1，结果= -1，数据=意向{  DAT =内容：//媒体/外部/图片/媒体/ 1}}到活动  {hotMetter.pack / hotMetter.pack.GetPhoto}：  显示java.lang.NullPointerException

这是我的code：

      Intent intent = new Intent();
      intent.setType("image/*");
      intent.setAction(Intent.ACTION_GET_CONTENT);

      startActivityForResult(Intent.createChooser(intent,"Select Picture"), SELECT_PICTURE);
}
Bitmap bitmap=null;
public void onActivityResult(int requestCode, int resultCode, Intent data)
{

    if (resultCode == Activity.RESULT_OK)
    {
        if (requestCode == SELECT_PICTURE)
        {
             Uri selectedImageUri = data.getData();
             selectedImagePath = getPath(selectedImageUri);
             tv.setText(selectedImagePath);
             img.setImageURI(selectedImageUri);
         }
    }


 public String getPath(Uri uri)
    {
        String[] projection = { MediaStore.Images.Media.DATA };
        Cursor cursor = managedQuery(uri, projection, null, null, null);
        if (cursor == null) return null;
        int column_index =             cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();
        String s=cursor.getString(column_index);
        cursor.close();
        return s;
    }

我得到的selectedImagePath =MNT / SD卡/ DCIM / MYIMAGE，但img.setImageURI（selectedImageUri）;我得到的错误。I`ve还使用位图，试图建立从SetImageBitmap的形象，但我得到了同样的错误。

I get the selectedImagePath="mnt/sdcard/DCIM/myimage" but on img.setImageURI(selectedImageUri); i get the error.I`ve also used a Bitmap and tried to set the image from SetImageBitmap but i get the same error.

LogCat中

05-06 19:41:34.191: E/AndroidRuntime(8466): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=Intent { dat=content://media/external/images/media/1 }} to activity {hotMetter.pack/hotMetter.pack.GetPhoto}: java.lang.NullPointerException
05-06 19:41:34.191: E/AndroidRuntime(8466):     at android.app.ActivityThread.deliverResults(ActivityThread.java:2532)
05-06 19:41:34.191: E/AndroidRuntime(8466):     at android.app.ActivityThread.handleSendResult(ActivityThread.java:2574)
05-06 19:41:34.191: E/AndroidRuntime(8466):     at android.app.ActivityThread.access$2000(ActivityThread.java:117)
05-06 19:41:34.191: E/AndroidRuntime(8466):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:961)
05-06 19:41:34.191: E/AndroidRuntime(8466):     at android.os.Handler.dispatchMessage(Handler.java:99)
05-06 19:41:34.191: E/AndroidRuntime(8466):     at android.os.Looper.loop(Looper.java:123)
05-06 19:41:34.191: E/AndroidRuntime(8466):     at android.app.ActivityThread.main(ActivityThread.java:3683)
05-06 19:41:34.191: E/AndroidRuntime(8466):     at java.lang.reflect.Method.invokeNative(Native Method)
05-06 19:41:34.191: E/AndroidRuntime(8466):     at java.lang.reflect.Method.invoke(Method.java:507)
05-06 19:41:34.191: E/AndroidRuntime(8466):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
05-06 19:41:34.191: E/AndroidRuntime(8466):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
05-06 19:41:34.191: E/AndroidRuntime(8466):     at dalvik.system.NativeStart.main(Native Method)
05-06 19:41:34.191: E/AndroidRuntime(8466): Caused by: java.lang.NullPointerException
05-06 19:41:34.191: E/AndroidRuntime(8466):     at hotMetter.pack.GetPhoto.onActivityResult(GetPhoto.java:55)
05-06 19:41:34.191: E/AndroidRuntime(8466):     at android.app.Activity.dispatchActivityResult(Activity.java:3908)
05-06 19:41:34.191: E/AndroidRuntime(8466):     at android.app.ActivityThread.deliverResults(ActivityThread.java:2528)

建议please.Thanks！

Advice please.Thanks!

推荐答案

以调试模式运行应用程序，并在当（请求code == SELECT_PICTURE）并检查变量作为您逐步完成，以确保它被设置为预期。如果您收到的 A NPE img.setImageURI（selectedImageUri）; 那么无论 IMG 或 selectedImageUri 未设置。

Run the app in debug mode and set a breakpoint on if (requestCode == SELECT_PICTURE) and inspect each variable as you step through to ensure it is being set as expected. If you are getting a NPE on img.setImageURI(selectedImageUri); then either img or selectedImageUri are not set.

这篇关于Android的获取图像从画廊到的ImageView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！