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在 Activity 中显示对话框或弹出浮层时，尽量使用 DialogFragment，而非Dialog/AlertDialog，这样便于随Activity生命周期管理对话框/弹出浮层的生命周期。
AskDialogFragment.java
public class AskDialogFragment extends DialogFragment { public Context mContext; public LayoutInflater mInflater; private View tipsView; public TextView tipsTextView; private TextView textTitle; private Button buttonYes; private Button buttonNo; private AskFragmentInterface askFragmentInterface = null; public static AskDialogFragment newInstance() { Bundle args = new Bundle(); AskDialogFragment fragment = new AskDialogFragment(); fragment.setArguments(args); return fragment; } public enum FOCUS_DIR { FOCUS_YES, FOCUS_NO } @Override public void onCreate(Bundle savedInstanceState) { setStyle(AskDialogFragment.STYLE_NO_FRAME,R.style.Theme_No_Frame); super.onCreate(savedInstanceState); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { System.out.println("tag = "+getTag()); // tag which is from acitivity which started this fragment getDialog().requestWindowFeature(Window.FEATURE_NO_TITLE); this.mContext = getActivity(); this.mInflater = LayoutInflater.from(mContext); initView(); initPopup(); setFocusDir(FOCUS_DIR.FOCUS_YES); setButtonNoStatus(View.VISIBLE); setTitle(R.string.warning); setMessage(R.string.really_delete_all); setPositiveButton(getString(R.string.yes), new View.OnClickListener() { @Override public void onClick(View view) { askFragmentInterface.setAskPositiveClick(); dismiss(); } }); setNegativeButton(getString(R.string.no), new View.OnClickListener() { @Override public void onClick(View view) { dismiss(); } }); buttonNo.setOnKeyListener(new View.OnKeyListener() { @Override public boolean onKey(View v, int keyCode, KeyEvent event) { // TODO Auto-generated method stub if (event.getAction() == KeyEvent.ACTION_DOWN) { switch (keyCode) { case KeyEvent.KEYCODE_DPAD_LEFT: case KeyEvent.KEYCODE_DPAD_RIGHT: buttonNo.clearFocus(); buttonYes.requestFocus(); buttonYes.setFocusable(true); return true; } } return false; } }); buttonYes.setOnKeyListener(new View.OnKeyListener() { @Override public boolean onKey(View v, int keyCode, KeyEvent event) { // TODO Auto-generated method stub if (event.getAction() == KeyEvent.ACTION_DOWN) { switch (keyCode) { case KeyEvent.KEYCODE_DPAD_LEFT: case KeyEvent.KEYCODE_DPAD_RIGHT: buttonYes.clearFocus(); buttonNo.requestFocus(); buttonNo.setFocusable(true); return true; } } return false; } }); return tipsView; } @Override public void onResume() { super.onResume(); } public void setAskDialogListener(AskFragmentInterface listener){ askFragmentInterface = listener; } public interface AskFragmentInterface { void setAskPositiveClick(); } private void initView() { // requestWindowFeature(Window.FEATURE_NO_TITLE); tipsView = mInflater.inflate(R.layout.ask_tips_dialog, null); WindowManager.LayoutParams params = new WindowManager.LayoutParams(); params.type = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY; getActivity().getWindow().setWindowAnimations(R.style.popwin_anim_bottom_style); textTitle = (TextView) tipsView.findViewById(R.id.asktipsTitleText); tipsTextView = (TextView) tipsView.findViewById(R.id.asktips_dialog_tips_text); buttonNo = (Button) tipsView.findViewById(R.id.asktips_dialog_butNo); buttonYes = (Button) tipsView.findViewById(R.id.asktips_dialog_butYes); } public void setFocusDir(FOCUS_DIR dir) { if (dir == FOCUS_DIR.FOCUS_NO) { buttonYes.clearFocus(); buttonNo.requestFocus(); buttonNo.setFocusable(true); } else { buttonNo.clearFocus(); buttonYes.requestFocus(); buttonYes.setFocusable(true); } } private void initPopup() { // TODO Auto-generated method stub WindowManager.LayoutParams lp = getActivity().getWindow().getAttributes(); lp.gravity = Gravity.CENTER; lp.type = WindowManager.LayoutParams.TYPE_PHONE | WindowManager.LayoutParams.TYPE_SYSTEM_ERROR; lp.width = WindowManager.LayoutParams.MATCH_PARENT; lp.height = WindowManager.LayoutParams.MATCH_PARENT; getActivity().getWindow().setAttributes(lp); } public void setMessage(CharSequence message) { tipsTextView.setText(message); } public void setMessage(int messageId) { tipsTextView.setText(messageId); } public void setTitle(CharSequence message) { textTitle.setText(message); } public void setTitle(int messageId) { textTitle.setText(messageId); } public void setPositiveButton(CharSequence text, Button.OnClickListener listener) { buttonYes.setText(text); buttonYes.setOnClickListener(listener); } public void setPositiveButton(int id, Button.OnClickListener listener) { buttonYes.setText(id); buttonYes.setOnClickListener(listener); } public void setNegativeButton(CharSequence text, Button.OnClickListener listener) { buttonNo.setText(text); buttonNo.setOnClickListener(listener); } public void setNegativeButton(int id, Button.OnClickListener listener) { buttonNo.setText(id); buttonNo.setOnClickListener(listener); } public void setButtonNoStatus(int visibility) { buttonNo.setVisibility(visibility); buttonYes.setFocusable(true); buttonYes.requestFocus(); }}使用方法：
1.实现接口AskFragmentInterface
2.
final AskDialogFragment askTipsDialog = AskDialogFragment.newInstance(); askTipsDialog.setAskDialogListener(this); askTipsDialog.show(getFragmentManager(), "dialog_fragment");XML:
1.style
<style name="Theme_No_Frame" parent="@android:style/Theme.Dialog"> <item name="android:windowFrame">@null</item> <item name="android:windowIsFloating">false</item> <item name="android:windowIsTranslucent">false</item> <item name="android:windowNoTitle">true</item> <item name="android:windowBackground">@color/transparent</item> <item name="android:backgroundDimEnabled">false</item> <item name="android:backgroundDimAmount">1</item> </style>2.layout
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@color/transparent" > <LinearLayout android:layout_width="460dp" android:layout_height="260dp" android:layout_centerHorizontal="true" android:layout_centerVertical="true" android:layout_gravity="center" android:background="@mipmap/add_panel" android:gravity="center" android:orientation="vertical" > <LinearLayout android:id="@+id/askTitle" android:layout_width="match_parent" android:layout_height="70dip" android:gravity="center" > <TextView android:id="@+id/asktipsTitleText" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_gravity="center" android:layout_marginLeft="20dip" android:layout_marginTop="15dip" android:gravity="center" android:singleLine="true" android:ellipsize="marquee" android:textColor="@color/text_color_black" android:textSize="32sp" /> </LinearLayout> <TextView android:id="@+id/asktips_dialog_tips_text" android:layout_width="wrap_content" android:layout_height="80dip" android:layout_gravity="center" android:layout_marginLeft="40dip" android:layout_marginRight="40dip" android:layout_weight="1" android:gravity="center" android:textColor="@color/text_color_black" android:textSize="26sp" /> <LinearLayout android:layout_width="match_parent" android:layout_height="56dip" android:layout_marginLeft="30dip" android:layout_marginRight="30dip" android:layout_marginBottom="8dip" android:gravity="center_horizontal" android:orientation="horizontal" > <Button android:id="@+id/asktips_dialog_butYes" android:layout_width="200dip" android:layout_height="match_parent" android:layout_marginLeft="12dip" android:paddingBottom="15dip" android:background="@drawable/dialog_button_style" android:textColor="@color/text_color_black" android:textSize="24sp" /> <Button android:id="@+id/asktips_dialog_butNo" android:layout_width="200dip" android:layout_height="match_parent" android:background="@drawable/dialog_button_style" android:textColor="@color/text_color_black" android:paddingBottom="15dip" android:layout_marginRight="12dip" android:textSize="24sp" /> </LinearLayout> </LinearLayout></RelativeLayout>转载地址：http://xbbzz.baihongyu.com/