Android开发之基于DialogFragment创建对话框的方法示例

/**
 * 使用DialogFragment创建对话框
 * @description：
 * @author ldm
 * @date 2016-5-12 下午2:00:01
 */
public class FragmentAlertDialog extends Activity {
  private Button button;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.fragment_dialog);
    // 初始化Button及设置监听
    button = (Button) findViewById(R.id.show);
    button.setOnClickListener(new OnClickListener() {
      public void onClick(View v) {
        // 弹出对话框
        showDialog();
      }
    });
  }
  void showDialog() {
    // DialogFragment 创建对话框
    DialogFragment newFragment = MyAlertDialogFragment
        .newInstance(R.string.alert_dialog_two_buttons_title);
    newFragment.show(getFragmentManager(), "dialog");
  }
  public void doPositiveClick() {
    Log.i("FragmentAlertDialog", "Positive click!");
  }
  public void doNegativeClick() {
    Log.i("FragmentAlertDialog", "Negative click!");
  }
  /**
   * 自定义弹出对话框DialogFragmet
   *
   * @description：
   * @author ldm
   * @date 2016-5-12 下午1:54:31
   */
  public static class MyAlertDialogFragment extends DialogFragment {
    public static MyAlertDialogFragment newInstance(int title) {
      MyAlertDialogFragment frag = new MyAlertDialogFragment();
      Bundle args = new Bundle();
      args.putInt("title", title);
      frag.setArguments(args);
      return frag;
    }
    /**
     * DialogFragment需要实现onCreateView或者onCreateDIalog方法。
     * onCreateView():使用定义的xml布局文件展示Dialog。
     * onCreateDialog():利用AlertDialog或者Dialog创建出Dialog。
     */
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
      int title = getArguments().getInt("title");
      return new AlertDialog.Builder(getActivity())//创建一个Dialog
     .setIcon(R.drawable.alert_dialog_icon)//设置图标
     .setTitle(title)//设置标题
     .setPositiveButton(R.string.alert_dialog_ok,
       new DialogInterface.OnClickListener() {//确认（OK）按钮
        public void onClick(DialogInterface dialog,
          int whichButton) {
         ((FragmentAlertDialog) getActivity())
           .doPositiveClick();
        }
       })
     .setNegativeButton(R.string.alert_dialog_cancel,//取消（Cancel）按钮
       new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog,
          int whichButton) {
         ((FragmentAlertDialog) getActivity())
           .doNegativeClick();
        }
       }).create();
    }
  }
}

<?xml version="1.0" encoding="utf-8"? 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:gravity="center_horizontal"
  android:orientation="vertical"
  android:padding="4dip"  
  <TextView
    android:id="@+id/text"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center_vertical|center_horizontal"
    android:layout_weight="1"
    android:gravity="top|center_horizontal"
    android:text="Example of displaying an alert dialog with a DialogFragment"
    android:textAppearance="?android:attr/textAppearanceMedium" / 
  <Button
    android:id="@+id/show"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_weight="0"
    android:text="@string/show"  
  </Button 
</LinearLayout