Question

我的MainActivity最初为空，带有操作栏。点击＆＃34;加＆＃34;在操作栏中，我打开一个DialogFragment，其中包含EditText和两个按钮，＆＃34;取消＆＃34;和＆＃34;继续＆＃34;。我无法发布图片，因为我没有足够的声誉，但是当我点击＆＃34;继续＆＃34;我创建了两个按钮;一个位于MainActivity布局的右上角，另一个位于前一个布局的左下方。我想要的是每次点击＆＃34;继续＆＃34;，我可以根据我之前解释的相同模式创建两个按钮。

这是我编写的代码，但它不能按照我的意愿运作。

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);

        ImageButton playButton = new ImageButton(this);
            playButton.setImageResource(R.drawable.ic_action_play_over_video);

        LinearLayout linearLayout = (LinearLayout) findViewById(R.id.button_row);
            linearLayout.addView(projectButton);
            linearLayout.addView(playButton);
    }

}

界面

public interface IProjectDialFrag {

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

}

和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;
    }

}

MainActivity的布局

<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" > 

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


</RelativeLayout>

如果您需要截图，请给我一点声望，我会立即放置。比你

再次感谢你。这是我的截图：

enter image description here

这是我想要的结果：

enter image description here

对于每个按钮，我必须能够添加更多＆＃34;播放＆＃34;。

Answer 1

但请看你的布局。

您的线性布局在宽度上是“wrap_conent”。您的线性布局也粘贴在父级的右侧。所以这正是你将得到的......所有的线性布局内容都粘在右侧并且采用了它的内容的优秀尺寸......好吧按钮。你得到了你告诉Android的内容。

如果你想得到你画出的东西，那么首先你的按钮的线性布局应该是match_parent，你可以将它的重力设置为左边的播放按钮，右边是CIAO和LUCA按钮......

Answer 2

<LinearLayout
    ...
    android:layout_width="wrap_content"
    ... >

MainActivity布局中的

应更改为

<LinearLayout
    ...
    android:layout_width="fill_parent"
    ... >

并添加这些行

LayoutParams lp = new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT) <---
lp.gravity = Gravity.RIGHT; <---

Button projectButton = new Button(this);
    projectButton.setText(projectName);
    projectButton.setLayoutParams(lp); <---

lp.gravity = Gravity.LEFT; <---
ImageButton playButton = new ImageButton(this);
    playButton.setImageResource(R.drawable.ic_action_play_over_video);
    playButton.setLayoutParams(lp); <---

Answer 3

@ udiboy1209

我只是重构你的代码，如下所示：

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

    LinearLayout.LayoutParams lp1 = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,     LayoutParams.WRAP_CONTENT);
        lp1.gravity = Gravity.END;

    Button projectButton = new Button(this);
        projectButton.setText(projectName);
        projectButton.setLayoutParams(lp1);

    LinearLayout.LayoutParams lp2 = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
        lp2.gravity = Gravity.START;

    Button playButton = new Button(this);
        playButton.setBackgroundResource(R.drawable.play_button_green);
        playButton.setLayoutParams(lp2);

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

}

如何动态改变按钮的位置

3 个答案: