Android 11/12图片上传报错java.lang.NullPointerException: uriString求助

问题现象 #

仅在Android 11、12系统中使用Matisse库实现图片上传时出现java.lang.NullPointerException: uriString错误，其他Android版本可正常上传。

错误日志 #

2022-11-15 12:27:13.220 25887-24114/com.app.zeis E/sqlite3_android: [IKR-38846] ONEPLUS_NAME_PARTS_MATCH SQLITE_OK
2022-11-15 12:27:15.951 25887-25887/com.app.zeis E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.app.zeis, PID: 25887
    java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=22, result=-1, data=Intent { act=inline-data (has extras) }} to activity {com.app.zeis/com.app.zeis.UploadPanActivity}: java.lang.NullPointerException: uriString
        at android.app.ActivityThread.deliverResults(ActivityThread.java:5220)
        at android.app.ActivityThread.handleSendResult(ActivityThread.java:5261)
        at android.app.servertransaction.ActivityResultItem.execute(ActivityResultItem.java:51)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2253)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:245)
        at android.app.ActivityThread.main(ActivityThread.java:8024)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:631)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:978)
     Caused by: java.lang.NullPointerException: uriString
        at android.net.Uri$StringUri.<init>(Uri.java:496)
        at android.net.Uri$StringUri.<init>(Uri.java:486)
        at android.net.Uri.parse(Uri.java:458)
        at com.app.zeis.UploadPanActivity.getImageUri(UploadPanActivity.java:314)
        at com.app.zeis.UploadPanActivity.onActivityResult(UploadPanActivity.java:233)
        at android.app.Activity.dispatchActivityResult(Activity.java:8316)
        at android.app.ActivityThread.deliverResults(ActivityThread.java:5213)
        at android.app.ActivityThread.handleSendResult(ActivityThread.java:5261) 
        at android.app.servertransaction.ActivityResultItem.execute(ActivityResultItem.java:51) 
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135) 
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2253) 
        at android.os.Handler.dispatchMessage(Handler.java:106) 
        at android.os.Looper.loop(Looper.java:245) 
        at android.app.ActivityThread.main(ActivityThread.java:8024) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:631) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:978) 
2022-11-15 12:27:16.086 25887-24114/com.app.zeis E/sqlite3_android: [IKR-38846] ONEPLUS_NAME_PARTS_MATCH SQLITE_OK

问题代码 #

图片选择代码 #

Matisse.from(UploadPanActivity.this)
        .choose(MimeType.ofImage())
        .countable(true).capture(false)
        .maxSelectable(1)
        .gridExpectedSize(300)
        .restrictOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED)
        .thumbnailScale(0.85f)
        .imageEngine(new GlideEngine())
        .showPreview(false) // Default is `true`
        .forResult(21);

结果回调代码 #

@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    System.out.println("AAkash " + requestCode);
    Bitmap photo = (Bitmap) data.getExtras().get("data");
    Uri tempUri = getImageUri(getApplicationContext(), photo);

    // CALL THIS METHOD TO GET THE ACTUAL PATH
    File finalFile = new File(getRealPathFromURI(tempUri));
    if (requestCode == 21 && resultCode == RESULT_OK) {
        sendPan(userDetails.getuserid(), "8", Matisse.obtainPathResult(data).get(0), "pan_photo");
    }
    
}

获取图片URI方法 #

public Uri getImageUri(Context inContext, Bitmap inImage) {
    Bitmap OutImage = Bitmap.createScaledBitmap(inImage, 1000, 1000, true);
    String path = MediaStore.Images.Media.insertImage(inContext.getContentResolver(), OutImage, "easy_loan_profile_pic", null);
    return Uri.parse(path);
}

通过URI获取真实路径方法 #

public String getRealPathFromURI(Uri uri) {
    String path = "";
    if (getContentResolver() != null) {
        Cursor cursor = getContentResolver().query(uri, null, null, null, null);
        if (cursor != null) {
            cursor.moveToFirst();
            int idx = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
            path = cursor.getString(idx);
            cursor.close();
        }
    }
    return path;
}

问题原因 #

1. MediaStore.Images.Media.insertImage()高版本失效：该方法在Android 10及以上版本（尤其是11/12）因存储权限模型变更，会返回null，导致Uri.parse(path)触发空指针异常。
2. 冗余代码引发崩溃：你在onActivityResult中额外处理的Bitmap获取、MediaStore插入逻辑完全多余——Matisse已经直接返回了选中图片的路径（Matisse.obtainPathResult(data).get(0)），这部分代码反而触发了高版本兼容性问题。
3. data.getExtras().get("data")不可靠：该方法返回的是缩略图Bitmap，并非原图，且在高版本系统中大概率返回null，进一步导致后续逻辑崩溃。

修复方案 #

直接移除冗余的Bitmap、Uri转换逻辑，使用Matisse提供的路径直接上传，同时适配Android 11+存储规则：

修正后的onActivityResult代码 #

@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    System.out.println("AAkash " + requestCode);
    // 仅在请求码匹配、结果成功且data不为空时处理
    if (requestCode == 21 && resultCode == RESULT_OK && data != null) {
        // 直接使用Matisse返回的图片路径
        String imagePath = Matisse.obtainPathResult(data).get(0);
        sendPan(userDetails.getuserid(), "8", imagePath, "pan_photo");
    }
}

额外注意事项 #

• 权限适配：AndroidManifest.xml中需声明必要权限，Android 11+如需访问公共存储，需添加android.permission.MANAGE_EXTERNAL_STORAGE权限并引导用户手动授权；若使用拍照功能，配合Matisse的capture()方法并通过MediaStore存储即可。
• 避免依赖DATA列：Android 10+中MediaStore.Images.ImageColumns.DATA列可能无法获取真实路径，推荐使用ContentResolver直接读取文件流上传：

// 示例：通过ContentResolver获取输入流上传
Uri imageUri = Matisse.obtainResult(data).get(0);
InputStream inputStream = getContentResolver().openInputStream(imageUri);
// 使用inputStream执行上传操作

内容的提问来源于stack exchange，提问作者MARSH