Android从照片库获取图片-某些设备上出现错误 [英] Android getting pictures from photo's gallery - error on some devices

问题描述

我的应用程序上有一个功能，可以打开照片库并选择要在ImageView中显示的图像.奇怪的是，在我的Samsung Galaxy S5上，代码可以正常工作，但是当我尝试使用ASUS Zenphone或Motorola Moto X时，代码将无法正常工作，并且应用程序崩溃.
所有设备都具有相同的Android版本(5.0)

I have a function on my app which I open the photo's gallery and select an image to show in a ImageView. The weird thing is, on my Samsung Galaxy S5, the code work perfectly, but when I try on an ASUS Zenphone, or Motorola Moto X the code just doesn't work and the application crashes.
All the devices has the same Android version (5.0)

这是我的代码示例:

打算打开照片库:

Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("image/*");
startActivityForResult(intent, IMG_SDCARD);

活动结果:

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {

    File file = null;

    if(data != null && requestCode == IMG_SDCARD && resultCode == getActivity().RESULT_OK){
        Uri img = data.getData();

        String[] cols = { MediaStore.Images.Media.DATA };
        Cursor cursor = getActivity().getContentResolver().query(img, cols, null, null, null);
        cursor.moveToFirst();

        int indexCol = cursor.getColumnIndex(cols[0]);
        String imgString = cursor.getString(indexCol);
        cursor.close();

        file = new File(imgString);

        if(file != null){
            wd.getImage().setResizedBitmap(file, 1200, 700);
            wd.getImage().setMimeFromImgPath(file.getPath());
        }
    }

    if(wd.getImage().getBitmap() != null){
        imageView.setImageBitmap(wd.getImage().getBitmap());
    }
}

你们会见过这样的东西吗?
在不同设备之间从照片库获取图像会有所不同吗?

Would you guys have ever seen something like this?
Could have differences on getting images from the photo's gallery between the different devices?

编辑
这是日志错误:

EDIT
This is the log error:

01-21 10:34:01.066  30243-30243/com.inthecheesefactory.lab.designlibrary E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.inthecheesefactory.lab.designlibrary, PID: 30243
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=65539, result=-1, data=Intent { dat=content://com.android.providers.media.documents/document/image:4904 flg=0x1 }} to activity {com.inthecheesefactory.lab.designlibrary/br.com.amais.viumeupet.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'char[] java.lang.String.toCharArray()' on a null object reference
        at android.app.ActivityThread.deliverResults(ActivityThread.java:3559)
        at android.app.ActivityThread.handleSendResult(ActivityThread.java:3602)
        at android.app.ActivityThread.access$1300(ActivityThread.java:151)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1334)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:135)
        at android.app.ActivityThread.main(ActivityThread.java:5289)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
 Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'char[] java.lang.String.toCharArray()' on a null object reference
        at java.io.File.fixSlashes(File.java:179)
        at java.io.File.<init>(File.java:128)
        at br.com.amais.viumeupet.Fragment1.onActivityResult(Fragment1.java:285)
        at android.support.v4.app.FragmentActivity.onActivityResult(FragmentActivity.java:153)
        at br.com.amais.viumeupet.MainActivity.onActivityResult(MainActivity.java:231)
        at android.app.Activity.dispatchActivityResult(Activity.java:6220)
        at android.app.ActivityThread.deliverResults(ActivityThread.java:3555)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3602)
            at android.app.ActivityThread.access$1300(ActivityThread.java:151)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1334)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5289)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)

推荐答案

public static final int GALLERY_INTENT_REQUEST_CODE = 0x000005;

要打开Gallery&使用以下代码获取所选图像的路径:

To open Gallery & get path of selected image use following code :

Intent photoPickerIntent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
 photoPickerIntent.setType("image/*");
 photoPickerIntent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());        
 mActPanelFragment.startActivityForResult(photoPickerIntent, ActivityConstantUtils.GALLERY_INTENT_REQUEST_CODE);

此后，您将在onActivityResult()方法中获取路径

After that you get path in onActivityResult() method

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
(requestCode == ActivityConstantUtils.GALLERY_INTENT_REQUEST_CODE && resultCode == Activity.RESULT_OK) {
try {
            String imagePath = getFilePath(data);
            // TODO: Here you set data to preview screen
    }catch(Exception e){}
}
}

private String getFilePath(Intent data) {
    String imagePath;
    Uri selectedImage = data.getData();
    String[] filePathColumn = {MediaStore.Images.Media.DATA};

    Cursor cursor = getActivity().getContentResolver().query(selectedImage, filePathColumn, null, null, null);
    cursor.moveToFirst();

    int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
    imagePath = cursor.getString(columnIndex);
    cursor.close();

    return imagePath;

}

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