Question

我想在我的Parse用户中检索图片存储以显示在我的imageview上，不知何故它只是崩溃了。基本上是我的个人资料页面上的代码。我的布局设置了一个imagview。我存储的图像位于名为“file”的字段中，文件名为uploaded_file.png。我希望它加载到图像视图，我设置一个监听器，以便它允许用户采取和上传新图片。

我的代码如下：非常感谢任何帮助。非常感谢。

public class ProfileActivity extends Activity {

    protected TextView mUsername;
    protected EditText mPassword;
    protected TextView mEmail;
    protected TextView mCreateAccountTextView;
    protected ParseUser mCurrentUser;
    protected List<ParseUser> mUsers;
    protected TextView chEmailbutton;
    protected TextView chPassbutton;
    protected ImageView profilePicture;
    protected Uri mMediaUri;
    protected String mFileType;
    protected ParseObject currentObject;


    protected TextView savePixButton;

     final int PIC_CROP = 1;
    //private static final String EMAIL_PATTERN = 
    //      "^[_A-Za-z0-9-\\+]+(\\.[_A-Za-z0-9-]+)*@"
    //      + "[A-Za-z0-9-]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$";

    private Uri mImageCaptureUri;
    private ImageView mImageView;

        private static final int PICK_FROM_CAMERA = 1;
        private static final int CROP_FROM_CAMERA = 2;
        private static final int PICK_FROM_FILE = 3;

    String username;
    String email;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
        setContentView(R.layout.profile);

        mUsername = (TextView) findViewById(R.id.usernameField);
        mEmail = (TextView)findViewById(R.id.emailField);
        mCurrentUser = ParseUser.getCurrentUser();
        username = mCurrentUser.getUsername();
        email = mCurrentUser.getEmail();
        mUsername.setText(username);
        mEmail.setText(email);  
        mMediaUri = getIntent().getData();

        currentObject = mCurrentUser.getParseObject("file");

        ParseFile image = currentObject.getParseFile("uploaded_file.png");
        final ParseImageView imageView = (ParseImageView) findViewById(R.id.profilepix);
        imageView.setParseFile(image);
        imageView.loadInBackground(new GetDataCallback() {
             public void done(byte[] data, ParseException e) {
             // The image is loaded and displayed!                    
             int oldHeight = imageView.getHeight();
             int oldWidth = imageView.getWidth();                 
             //Log.v("LOG!!!!!!", "imageView height = " + oldHeight);      // DISPLAYS 90 px
             //Log.v("LOG!!!!!!", "imageView width = " + oldWidth);        // DISPLAYS 90 px      
             }
        });

        profilePicture = (ImageView)findViewById(R.id.profilepix);
        profilePicture.setOnClickListener(new View.OnClickListener() {

LogCat错误

05-13 23:20:44.439: E/ViewRootImpl(31057): sendUserActionEvent() mView == null
05-13 23:20:47.969: E/AndroidRuntime(31057): FATAL EXCEPTION: main
05-13 23:20:47.969: E/AndroidRuntime(31057): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.fappbulously.sharemate/com.fappbulously.sharemate.ProfileActivity}: java.lang.NullPointerException
05-13 23:20:47.969: E/AndroidRuntime(31057):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2295)
05-13 23:20:47.969: E/AndroidRuntime(31057):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2349)
05-13 23:20:47.969: E/AndroidRuntime(31057):    at android.app.ActivityThread.access$700(ActivityThread.java:159)
05-13 23:20:47.969: E/AndroidRuntime(31057):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1316)
05-13 23:20:47.969: E/AndroidRuntime(31057):    at android.os.Handler.dispatchMessage(Handler.java:99)
05-13 23:20:47.969: E/AndroidRuntime(31057):    at android.os.Looper.loop(Looper.java:137)
05-13 23:20:47.969: E/AndroidRuntime(31057):    at android.app.ActivityThread.main(ActivityThread.java:5419)
05-13 23:20:47.969: E/AndroidRuntime(31057):    at java.lang.reflect.Method.invokeNative(Native Method)
05-13 23:20:47.969: E/AndroidRuntime(31057):    at java.lang.reflect.Method.invoke(Method.java:525)
05-13 23:20:47.969: E/AndroidRuntime(31057):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1209)
05-13 23:20:47.969: E/AndroidRuntime(31057):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1025)
05-13 23:20:47.969: E/AndroidRuntime(31057):    at dalvik.system.NativeStart.main(Native Method)
05-13 23:20:47.969: E/AndroidRuntime(31057): Caused by: java.lang.NullPointerException
05-13 23:20:47.969: E/AndroidRuntime(31057):    at com.fappbulously.sharemate.ProfileActivity.onCreate(ProfileActivity.java:95)
05-13 23:20:47.969: E/AndroidRuntime(31057):    at android.app.Activity.performCreate(Activity.java:5372)
05-13 23:20:47.969: E/AndroidRuntime(31057):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1104)
05-13 23:20:47.969: E/AndroidRuntime(31057):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2257)
05-13 23:20:47.969: E/AndroidRuntime(31057):    ... 11 more

Answer 1

我认为问题来自这一行：

mCurrentUser.getParseObject("file");

您正试图从ParseObject表格的“文件”列中获取Users，然后尝试从ParseFile获取可能不存在的ParseObject存在。

您想要的是从位于名为“file”的列中的ParseFile表中检索Users。由于ParseUser继承自ParseObject，您可以执行此操作：

ParseUser.getCurrentUser().getParseFile("file")

从Parse检索图像到ImageView - 没有工作

1 个答案: