Question

我想在TextView方法中更改onActivityResult的文字。它似乎设置正确，但我无法在view中看到它。

TextView位于Fragment的第三个ViewPager。

所以这是我的代码：

public class TabsFacturasActivity extends SherlockFragmentActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.fragment_pager);
        //...
        mAdapter = new MyAdapter(getSupportFragmentManager());

        mPager = (ViewPager)findViewById(R.id.pager);
        mPager.setAdapter(mAdapter);
       //...
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch (requestCode) {
            case FILE_SELECT_CODE:
            if (resultCode == RESULT_OK) {
                adjunto = true;
                // Get the Uri of the selected file 
                Uri uri = data.getData();
                // Get the path
                String path = "";
                try {
                    path = MyUtility.getPath(this, uri);
                } catch (URISyntaxException e) {
                    myApplication.throwException(this);
                    e.printStackTrace();
                }
                String imgName = path.split("/")[path.split("/").length-1];
                LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                View view = inflater.inflate(R.layout.activity_lectura, null, false);
                textViewImg = (TextView) view.findViewById(R.id.textViewUrlImgLectura);
                System.out.println("text view before: "+textViewImg.getText()); //It returns correct value "..."
                textViewImg.setText(imgName);
                textViewImg.invalidate(); //It does nothing
                System.out.println("text view after: "+textViewImg.getText()); //It returns correct value with image path
                filePath = path;
            }
            break;
        }
        super.onActivityResult(requestCode, resultCode, data);
    }

    private static class MyAdapter extends FragmentPagerAdapter {

        private String[] titles = { "VER FACTURAS", "VER CONSUMO", "INTRODUCIR LECTURA" };

        public MyAdapter(FragmentManager fragmentManager) {
            super(fragmentManager);
        }

        @Override
        public CharSequence getPageTitle(int position) {
            return titles[position];
        }

        @Override
        public Fragment getItem(int position) {
            switch (position) {
            case 0: // Fragment # 0
                return new FacturasActivity();
            case 1: // Fragment # 1
                return new ConsumoActivity();
            case 2:// Fragment # 2
                return new LecturaActivity(); //TextView is here
            }
            return null;
        }

        @Override
        public int getCount() {
            return titles.length;
        }

    }
}

正如您所看到的，我已尝试使用invalidate，但它什么也没做。我该如何解决这个问题？

Answer 1

尝试textViewImg.requestLayout();

Answer 2

你的碎片可能有问题。可能有另一个文本视图在您可能已加载的另一个片段中具有相同的ID，并且正在设置文本。尝试打印textview id的值。

Answer 3

我已经用这个答案解决了：https://stackoverflow.com/a/18487696/1088643

我在这里获得Fragment的实例和访问方法：

LecturaActivity lecturaFragment = (LecturaActivity) 
                        getSupportFragmentManager().findFragmentByTag(
                           "android:switcher:"+R.id.pager+":"+2);
lecturaFragment.changeImgText(imgName);

更改TextView的文本无效

3 个答案: