在onActivityResult之后，屏幕旋转为横向

Question

I'm tring to open camera and take a picture and after that to store the image in a listView with image. the problem is, after i take the picture and return to my activity result the screen returns in landscape and a short while after rotates back to portrait and make me to lost the data. why this is happened? here is my code:

  if (requestCode == mActions.REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
        Bitmap imageCapturred = (Bitmap) data.getExtras().get("data");
        list.add(new ModelChat(null , false,null ,imageCapturred));
        mChatAdapter = new ChatRowAdapter(this , list);
        mChatList.setAdapter(mChatAdapter);
        System.out.println("Get Image from Camera");
    }

but the way.. I dont want using android:screenOrientation="portrait" Any idea how to slove it?

Answer 1

make a intent as class variable and set the value of this intent when onActivityResult called like this.camaraData =data; and also save this class variable in onsavedInstanceState() function and restore this value in onRestoreInstanceState() or in oncreate() eg.

            public class yourActivityName extends Activity
            {

            Intent camaraData ;boolean chkCalled;
            @Override
            protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);   
                // Check whether we're recreating a previously destroyed instance
                if (savedInstanceState != null) {
                    // Restore value of members from saved state
              camaraData =savedInstanceState.getParcelable("camaraData");   
             if(!chkCalled){
    onActivityResult(mActions.REQUEST_IMAGE_CAPTURE,Activity.Result_OK,camaraData); 
    chkCalled=true;
        }
    }  
            ...... /* your code goes here */  ...
    }


            @Override
            public void onSaveInstanceState(Bundle savedInstanceState) {
                // Save the user's current game state
                savedInstanceState..putParcelable("camaraData", camaraData);    
            // Always call the superclass so it can save the view hierarchy state
                super.onSaveInstanceState(savedInstanceState);
            }
            @Override
            public void onActivityResult(int requestCode,int resultCode,Intent data) 
            {
               camaraData=data;
            if (requestCode==mActions.REQUEST_IMAGE_CAPTURE&&resultCode==RESULT_OK){
                    Bitmap imageCapturred = (Bitmap) data.getExtras().get("data");
                    list.add(new ModelChat(null , false,null ,imageCapturred));
                    mChatAdapter = new ChatRowAdapter(this , list);
                    mChatList.setAdapter(mChatAdapter);
                    System.out.println("Get Image from Camera");
                }
            }

            public void onRestoreInstanceState(Bundle savedInstanceState) {
                // Always call the superclass so it can restore the view hierarchy
                super.onRestoreInstanceState(savedInstanceState);       
                // Restore state members from saved instance
                camaraData = savedInstanceState.getParcelable("camaraData");     
        if(!chkCalled){ 
               onActivityResult(mActions.REQUEST_IMAGE_CAPTURE,
Activity.Result_OK,camaraData); 
chkCalled=true;
        }
            }

        }

call only one way to handle this either in onCreate() or by using onRestoreInstanceState() function your problem will me solve as per your requirement or you can keep both but call of onActivityResult(...) function only from one place by checking whether its called or not by using boolean value as given in example

Answer 2

In general, what you need to do if you want your activity to survive screen rotation is save/restore your activites instance state. Have a look at Recreating an Activity