Question

我正尝试从该活动的图库中获取图像后，将图像从另一个活动发送回主活动。应用程序在执行此操作时崩溃。我怎么解决这个问题？这是我的代码

第二项活动

Intent returnIntent = new Intent();

                        String str = filePath.toString();
                        returnIntent.putExtra("UPDATED_PIC", str);
                        setResult(RESULT_OK,returnIntent);

主要活动

    @Override
        protected void onActivityResult(int requestCode, int resultCode, Intent data) {
            super.onActivityResult(requestCode, resultCode, data);
            if (requestCode == PROFILE_PICTURE_REQUEST) {
                if (resultCode == RESULT_OK) {
                    if(data != null) {


                        String str = getIntent().getStringExtra("UPDATED_PIC");
                         //Getting Error here                       
                         filePath = Uri.parse(str);

                        try {
                            //Getting the Bitmap from Gallery
                            Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), filePath);
                            // Setting the Bitmap to ImageView
                            mNetworkImageView.setImageBitmap(bitmap);
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    }
                }
            }

        }

错误记录

E/AndroidRuntime: FATAL EXCEPTION: main
                  Process: com.example.admin.profilepicture, PID: 4975
                  java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=Intent { (has extras) }} to activity {com.example.admin.profilepicture/com.example.admin.profilepicture.MainActivity}: java.lang.NullPointerException: uriString
                      at android.app.ActivityThread.deliverResults(ActivityThread.java:4089)
                      at android.app.ActivityThread.handleSendResult(ActivityThread.java:4132)
                      at android.app.ActivityThread.-wrap20(ActivityThread.java)
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1533)
                      at android.os.Handler.dispatchMessage(Handler.java:102)
                      at android.os.Looper.loop(Looper.java:154)
                      at android.app.ActivityThread.main(ActivityThread.java:6119)
                      at java.lang.reflect.Method.invoke(Native Method)
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
                   Caused by: java.lang.NullPointerException: uriString
                      at android.net.Uri$StringUri.<init>(Uri.java:475)
                      at android.net.Uri$StringUri.<init>(Uri.java)
                      at android.net.Uri.parse(Uri.java:437)
                      at com.example.admin.profilepicture.MainActivity.onActivityResult(MainActivity.java:61)
                      at android.app.Activity.dispatchActivityResult(Activity.java:6932)
                      at android.app.ActivityThread.deliverResults(ActivityThread.java:4085)
                      at android.app.ActivityThread.handleSendResult(ActivityThread.java:4132) 
                      at android.app.ActivityThread.-wrap20(ActivityThread.java) 
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1533) 
                      at android.os.Handler.dispatchMessage(Handler.java:102) 
                      at android.os.Looper.loop(Looper.java:154) 
                      at android.app.ActivityThread.main(ActivityThread.java:6119) 
                      at java.lang.reflect.Method.invoke(Native Method) 
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886) 
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)

Answer 1

您需要在onActivityResult()

的MainActivity上编写此代码

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    String str = data.getStringExtra("UPDATED_PIC");
    filePath = Uri.parse(str);
}

使用data代替getIntent()

中的onActivityResult()

在调用SecondActivity时，您也应该传递请求代码

查看this参考问题

Answer 2

而不是getIntent()尝试使用data.getStringExtra()

中的onActivityResult()

Android：在两个活动之间传递图像

2 个答案: