Question

我有两个布局table.xml（port）和table.xml（land），其中有一个是横向的，另一个是protrait。

我已将此布局包含在另一个名为fragment_test.xml的布局中，如下所示：

    <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
         >

   <include layout="@layout/table"/>

    </RelativeLayout>

这是我上面布局fragment_test的片段代码：

public class Fragment_test extends Fragment  implements View.OnTouchListener{
     @Override
        public void onActivityCreated(Bundle savedInstanceState) {
            super.onActivityCreated(savedInstanceState);



         mytable= (LinearLayout) getActivity().findViewById(R.id.mytableid);
        typeface = Typeface.createFromAsset(getActivity().getAssets(),   "fonts/font.ttf");

                  for (int i = 0; i < table1.getChildCount(); i++) {
                    LinearLayout mychild = (LinearLayout) mytable.getChildAt(i);
                    for (int j = 0; j < mychild.getChildCount(); j++) {
                        Button b = (Button) child.getChildAt(j);
                        b.setTypeface(typeface);
                         b.setOnTouchListener(this);
                   }

                }
            }

         }


        //this is called when a button is touched
        @Override
        public boolean onTouch(View view, MotionEvent motionEvent) {
    return true;
    }

}

所以基本上我在表格布局中有几个按钮，我正在为每个按钮循环到setontouchlistener。

所以我的问题是当我从protrait切换到横向或相反时按钮的touchlistener不再起作用，甚至在更改布局时字体不再起作用。

＆GT;修改：这是活动代码

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        getSupportActionBar().setTitle("Home");


       FragmentManager manager = getFragmentManager();
       manager.beginTransaction().add(R.id.container, new Fragment_test(), "mytag").commit();

    }

Answer 1

尝试在setRetainInstance(true)

之后致电super.onActivityCreated(savedInstanceState);

here is the documentation of setRetainInstance(boolean)

活动：

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main2);

    FragmentManager manager = getSupportFragmentManager();
    Fragment myFragment = manager.findFragmentByTag("myFragment");
    if (myFragment == null) {
        myFragment = new ParentFragment();
    }

    manager.beginTransaction().add(R.id.fragmentHolder, myFragment, "myFragment").commit();
}
}

片段：

public class ParentFragment extends Fragment{

@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    setRetainInstance(true);
}
}

Answer 2

我只是给你提供信息。

您可以通过这种方式查看设备Orientataion并设置布局。

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    if (newConfig.orientation==Configuration.ORIENTATION_LANDSCAPE){
        setContentView(R.layout.table_horizontal);
        button1 = (Button)findViewById(R.id.button1);
        button1.setOnClickListener(this);
    }else if (newConfig.orientation==Configuration.ORIENTATION_PORTRAIT){
        setContentView(R.layout.table_vertical);
        button1 = (Button)findViewById(R.id.button1);
        button1.setOnClickListener(this);
    }
}

在方向更改按钮touchlistener无法正常工作

2 个答案: