java如何显示对话框片段？

Question

嗨，我想知道当用户点击一个按钮时，我如何在屏幕上显示一个对话框

java文件

public class Example extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.example_layout);

        findViewById(R.id.exampleButton).setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {

                Log.i("Jomin","sdsd");
                ExampleDialogFragment CallUs = new ExampleDialogFragment();
                CallUs.getDialog();
            }
        });
    }
}

这是示例DialogFragment java文件

public class ExampleDialogFragment extends 安卓.support.v4.app.DialogFragment {

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {

        final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        builder.setCancelable(false);      builder.setTitle(R.string.LogOutTitle).setMessage(R.string.LogOutMessage).setPositiveButton(R.string.LogOutPositive,new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {

                Uri number = Uri.parse("tel:0845 3000 116");
                Intent callIntent = new Intent(Intent.ACTION_DIAL, number);
                startActivity(callIntent);
            }
        });

        AlertDialog dialog = builder.create();
        return dialog;
    }
}

那么，有人能告诉我，当用户单击ID为-exampleButton的按钮时，如何显示这个对话框吗

Answer 1

callUs.show(getFragmentManager(), "SOME_TAG");

我认为您必须将活动切换到FragmentActivity，并使用getSupportFragmentManager（）重新设置getFragmentManager（），因为您的DialogFragment从支持库扩展了版本

Answer 2

这是一个很好的指南：http://android-developers.blogspot.com/2012/05/using-dialogfragments.html

import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
// ...

public class FragmentDialogDemo extends FragmentActivity implements EditNameDialogListener {

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    showEditDialog();
}

private void showEditDialog() {
    FragmentManager fm = getSupportFragmentManager();
    EditNameDialog editNameDialog = new EditNameDialog();
    editNameDialog.show(fm, "fragment_edit_name");
}
}