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Dialog Fragment的優點是當Activity重起的時候

Diaolog上面的值也會跟著重設

就和Fragmentㄧ樣

1. 首先到官網http://developer.android.com/guide/topics/ui/dialogs.html#DialogFragment

2. 接著創見ㄧ個class 繼承 DialogFragment

然後override它的onCreatDialog方法

範例如下

public class TestDialog extends DialogFragment{

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        return super onCreareDialog(saveInstanceState);
    }

}

3. 接著在裡面回傳AlertDialog就可以了

而用法可以參考前幾篇

[Android] 10-1 基礎Dialog

[Android] 10-2 List Dialog

[Android] 10-3 自定Dialog

範例如下

public class TestDialog extends DialogFragment{

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        builder.setMessage("內容")
                .setPositiveButton("確定", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {
                        // do what you want to do
                    }
                })
                .setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {
                        // User cancelled the dialog
                    }
                });
        // Create the AlertDialog object and return it
        return builder.create();
    }

}

4. 而在show dialog則直接new該class

然後用show(FragmentManager, TAG)就可以了

        TestDialog dialog = new TestDialog();
        dialog.show(getFragmentManager(), "TAG");

也可以參考官網http://developer.android.com/guide/topics/ui/dialogs.html#ShowingADialog

5. 最後就可以看到他和ㄧ般的Dialog一樣了