如何更改动态创建视图的位置

Question

我有一个具有操作栏的MainActivity。点击“加号”，它会打开由EditText，“取消”按钮和“继续”按钮组成的DialogFragment。 通过点击“继续”，我创建了一个新的按钮，其中的字符串位于EditText中。默认按钮位于主要活动的左上角。我想要的是每次我创建一个位于右上角的按钮，一个在另一个下面。我能怎么做？

这里是我的代码：

MainActivity

public class MainActivity extends FragmentActivity implements IProjectDialFrag { 

    private ProjectDialogFragment projectDialFrag = new ProjectDialogFragment(); 

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

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     MenuInflater inflater = getMenuInflater(); 
      inflater.inflate(R.menu.main, menu); 
     return super.onCreateOptionsMenu(menu); 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     int id = item.getItemId(); 

     switch (id) { 
      case R.id.action_settings: 
       //TODO 
       return true; 
      case R.id.filters: 
       Intent intent1 = new Intent(MainActivity.this, FiltersActivity.class); 
       startActivity(intent1); 
       return true; 
      case R.id.action_new: 
       return true; 
      case R.id.add_button: 
       Intent intent2 = new Intent(MainActivity.this, ButtonsActivity.class); 
       startActivity(intent2); 
       return true; 
      case R.id.add_project: 
       projectDialFrag.show(getFragmentManager(), "projectDialog"); 
       return true; 
      default: 
       return super.onOptionsItemSelected(item); 
     } 

    } 

    @Override 
    public void onDialogNegativeClick(DialogFragment dialog) { 
     return; 
    } 

    @Override 
    public void onDialogPositiveClick(DialogFragment dialog) { 
     EditText editText = (EditText) dialog.getDialog().findViewById(R.id.project_name); 
     String projectName = editText.getText().toString(); 

     Button projectButton = new Button(this); 
      projectButton.setText(projectName); 

//  LinearLayout linearLayout = (LinearLayout) findViewById(R.id.main_layout); 
//   linearLayout.addView(projectButton); 

     RelativeLayout relativeLayout = (RelativeLayout) findViewById(R.id.main_layout); 
      relativeLayout.addView(projectButton); 


    } 

} 

DialogFragment

public class ProjectDialogFragment extends DialogFragment { 

    private IProjectDialFrag iProjDialFrag; 

    @SuppressLint("InflateParams") 
    @Override 
    public Dialog onCreateDialog(Bundle savedInstanceState) { 
     AlertDialog.Builder createProjectAlert = new AlertDialog.Builder(getActivity()); 

     createProjectAlert.setTitle("Create Project"); 

     LayoutInflater inflater = getActivity().getLayoutInflater(); 

     createProjectAlert.setView(inflater.inflate(R.layout.project_dialog_fragment, null)) 

      .setPositiveButton(R.string.conti_nue, new DialogInterface.OnClickListener() { 

       @Override 
       public void onClick(DialogInterface dialog, int id) { 
        iProjDialFrag.onDialogPositiveClick(ProjectDialogFragment.this); 
       } 
      }) 
      .setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() { 

       @Override 
       public void onClick(DialogInterface dialog, int id) { 
        iProjDialFrag.onDialogNegativeClick(ProjectDialogFragment.this); 

       } 
      }); 

     return createProjectAlert.create(); 

    } 

    @Override 
    public void onAttach(Activity activity) { 
     super.onAttach(activity); 
     iProjDialFrag = (IProjectDialFrag) activity; 
    } 

} 

接口

public interface IProjectDialFrag { 

    public void onDialogPositiveClick(DialogFragment dialog); 
    public void onDialogNegativeClick(DialogFragment dialog); 

} 

和XML布局：

MainActivity布局

<RelativeLayout 

    xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 

    android:id="@+id/main_layout" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="horizontal" > 

</RelativeLayout> 

DialogFragment布局

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

    <EditText 
     android:id="@+id/project_name" 
     android:inputType="text" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:layout_marginTop="16dp" 
     android:layout_marginLeft="4dp" 
     android:layout_marginRight="4dp" 
     android:layout_marginBottom="4dp" 
     android:hint="@string/hint_project_alert" /> 

</LinearLayout> 

Answer 1

试试这个...

更改您的MainActivity布局：

<?xml version="1.0" encoding="utf-8"?> 
    <RelativeLayout 

     xmlns:android="http://schemas.android.com/apk/res/android" 
     xmlns:tools="http://schemas.android.com/tools" 
     android:id="@+id/main_layout" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" > 

     <LinearLayout 
      android:id="@+id/buttons_painel" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:orientation="vertical" 
      android:layout_alignParentTop="true" 
      android:layout_alignParentRight="true"> 

     </LinearLayout> 

    </RelativeLayout> 

，改变你的onDialogPositiveClick

@Override 
public void onDialogPositiveClick(DialogFragment dialog) { 
    EditText editText = (EditText) dialog.getDialog().findViewById(R.id.project_name); 
    String projectName = editText.getText().toString(); 

    Button projectButton = new Button(this); 
     projectButton.setText(projectName); 

    LinearLayout linearLayout = (LinearLayout) findViewById(R.id.buttons_painel); 
    linearLayout.addView(projectButton); 


}