Question

我尝试创建带有布局的自定义对话框。我尚未向对话框添加任何功能。目前，我正在尝试通过MainActivity中的FAB单击来启动它。

这是我的自定义对话框：

public class GenerateDialog extends Fragment implements DialogInterface.OnCancelListener, DialogInterface.OnDismissListener {

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        return inflater.inflate(R.layout.dialog_layout, container, false);
    }

    ...
}

这是我的MainActivity。我不知道如何在onClick中启动对话框。我尝试使用一种意图，但是将对话框强制转换为活动时抛出了错误：

public class MainActivity extends AppCompatActivity {
    ...
    GenerateDialog generateDialog;

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

        ...

        generateDialog = new GenerateDialog();

        floatingActionButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // Show GenerateDialog

            }
        });
    }
}

Answer 1

做了类似的事情，您的对话框类应该扩展Dialog而不是Fragment。应该是：public class GenerateDialog extends Dialog

然后在构造函数上给它充气：

public class GenerateDialog extends Dialog {

public GenerateDialog(@NonNull Context context) {
        super(context, android.R.style.Theme_NoTitleBar_Fullscreen);
        setContentView(R.layout.dialog_layout);
    }
 … 
}

在FAB侦听器上，启动对象后，您可以调用show（）（如果对象名为generateDialog，则在实例化后执行generateDialog.show();，这是对话框所必需的）出现）。

F.i。：

public class MainActivity extends AppCompatActivity {
    ...
    GenerateDialog generateDialog;

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

        ...

        generateDialog = new GenerateDialog(this);

        floatingActionButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                generateDialog.show();
            }
        });
    }
}

Answer 2

您可以这样显示对话框

public class CustomDialog extends Activity {

    private static Context context;

    private static Dialog dialog;
    public static void dialog(final Context ctxt, final String calledBy,
                              String title, String message, String buttonText) {

        context = ctxt;

        if( dialog != null && dialog.isShowing() ) return;

        dialog = new Dialog(context);

        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
        dialog.getWindow().setBackgroundDrawableResource(R.color.transparent);
        dialog.setCancelable(false);
        dialog.setCanceledOnTouchOutside(false);
        dialog.setContentView(R.layout.custom_dialog_single_button);

        TextView txtTitle = dialog.findViewById(R.id.txtTitle);
        TextView txtMessage = dialog.findViewById(R.id.txtMessage);
        TextView tvOK = dialog.findViewById(R.id.tvOK);

        txtTitle.setText(title);
        txtMessage.setText(message);
        tvOK.setText(buttonText);



        dialog.show();

    }

并这样称呼

CustomDialogSingleButton.dialog(context,
                        Constants.SYNC_FILES
                        , context.getResources().getString(R.string.sync_files_title),
                        context.getResources().getString(R.string.sync_files_msg), "OK");

只需尝试此代码，您的对话框就会出现

Answer 3

对话框片段的代码

public class MyCustomDialog extends DialogFragment{

 @Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setStyle(android.app.DialogFragment.STYLE_NORMAL, android.R.style.Theme_Black_NoTitleBar);
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {

View v = inflater.inflate(R.layout.dialog_view, container, false);
return v;
}

}

并从如下所示的活动中调用此MyCustomDialog，

 MyCustomDialog dialog = new MyCustomDialog();
 Bundle args = new Bundle();
 FragmentTransaction ft = getFragmentManager().beginTransaction();
 dialog.show(ft, MyCustomDialog.TAG);

Answer 4

自定义视图

<!-- fragment_edit_name.xml -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/edit_name"
    android:layout_width="wrap_content" android:layout_height="wrap_content"
    android:layout_gravity="center" android:orientation="vertical"  >

    <TextView
        android:id="@+id/lbl_your_name" android:text="Your name" 
        android:layout_width="wrap_content" android:layout_height="wrap_content" />

    <EditText
        android:id="@+id/txt_your_name"
        android:layout_width="match_parent"  android:layout_height="wrap_content" 
        android:inputType="text"
        android:imeOptions="actionDone" />
</LinearLayout>

，并从对话框片段的支持版本开始定义片段本身：

import android.support.v4.app.DialogFragment;
// ...

public class EditNameDialogFragment extends DialogFragment {

    private EditText mEditText;

    public EditNameDialogFragment() {
        // Empty constructor is required for DialogFragment
                // Make sure not to add arguments to the constructor
                // Use `newInstance` instead as shown below
    }

    public static EditNameDialogFragment newInstance(String title) {
        EditNameDialogFragment frag = new EditNameDialogFragment();
        Bundle args = new Bundle();
        args.putString("title", title);
        frag.setArguments(args);
        return frag;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_edit_name, container);
    }

    @Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        // Get field from view
        mEditText = (EditText) view.findViewById(R.id.txt_your_name);
        // Fetch arguments from bundle and set title
        String title = getArguments().getString("title", "Enter Name");
        getDialog().setTitle(title);
        // Show soft keyboard automatically and request focus to field
        mEditText.requestFocus();
        getDialog().getWindow().setSoftInputMode(
            WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);
    }
}

，并在扩展AppCompatActivity的活动中显示对话框：

从 FAB

的onclick方法中

调用 showEditDialog() 方法

private void showEditDialog() {
      FragmentManager fm = getSupportFragmentManager();
      EditNameDialogFragment editNameDialogFragment = EditNameDialogFragment.newInstance("Some Title");
      editNameDialogFragment.show(fm, "fragment_edit_name");
  }

检查info

如何通过FAB单击显示自定义对话框？

4 个答案: