android中的弹出框提示基本步骤如下：1、继承Activity2、在需要提示地方showDialog(id)3、重载Activity的onCr
android中的弹出框提示
基本步骤如下：
1、继承Activity
2、在需要提示地方showDialog(id);
3、重载Activity的onCreateDialog(id)的方法
如：
@Override protected Dialog onCreateDialog(int id) { return new AlertDialog.Builder(this) .setMessage("Please update your Settings.") .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { //updatePreferences(); } }) .setNegativeButton( android.R.string.cancel, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { // Noop. } }) .create(); }4、运行android即可
5、有时在一个Activity中有多个不同样式的showDialog(id)，则需要对onCreateDialog(id)方法重写成下面对方式：
@Override protected Dialog onCreateDialog(int id) { switch (id) { case CALL_ADDRESS: LayoutInflater factory = LayoutInflater.from(this); final View textBoxView = factory.inflate(R.layout.call_address_dialog, null); return new AlertDialog.Builder(this) .setTitle("title.") .setView(textBoxView) .setPositiveButton( android.R.string.ok, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { EditText textField = (EditText) (textBoxView.findViewById(R.id.calladdress_edit)); sipAddress = textField.getText().toString(); initiateCall(); } }) .setNegativeButton( android.R.string.cancel, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { // Noop. } }) .create(); case UPDATE_SETTINGS_DIALOG: return new AlertDialog.Builder(this) .setMessage("Please update your Settings.") .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { //updatePreferences(); } }) .setNegativeButton( android.R.string.cancel, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { // Noop. } }) .create(); } return null; }switch (id)是对showDialog(id)中不同的ID选择不同的AlertDialog
View则可以对Dialog进行一些样式的修改
以下是android自带的apidemos下的比较完整弹出框例子
/* * Copyright (C) 2007 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */package com.example.android.apis.app;import android.app.Activity;import android.app.AlertDialog;import android.app.Dialog;import android.app.ProgressDialog;import android.content.DialogInterface;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.LayoutInflater;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.Toast;import android.database.Cursor;import android.provider.Contacts;import com.example.android.apis.R;/** * Example of how to use an {@link android.app.AlertDialog}. * <h3>AlertDialogSamples</h3><p>This demonstrates the different ways the AlertDialog can be used.</p><h4>Demo</h4>App/Dialog/Alert Dialog <h4>Source files</h4> * <table + which + " , " + items[which]) .show(); } }) .create(); case DIALOG_PROGRESS: mProgressDialog = new ProgressDialog(AlertDialogSamples.this); mProgressDialog.setIcon(R.drawable.alert_dialog_icon); mProgressDialog.setTitle(R.string.select_dialog); mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); mProgressDialog.setMax(MAX_PROGRESS); mProgressDialog.setButton(getText(R.string.alert_dialog_hide), new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { /* User clicked Yes so do some stuff */ } }); mProgressDialog.setButton2(getText(R.string.alert_dialog_cancel), new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { /* User clicked No so do some stuff */ } }); return mProgressDialog; case DIALOG_SINGLE_CHOICE: return new AlertDialog.Builder(AlertDialogSamples.this) .setIcon(R.drawable.alert_dialog_icon) .setTitle(R.string.alert_dialog_single_choice) .setSingleChoiceItems(R.array.select_dialog_items2, 0, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { /* User clicked on a radio button do some stuff */ } }) .setPositiveButton(R.string.alert_dialog_ok, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { /* User clicked Yes so do some stuff */ } }) .setNegativeButton(R.string.alert_dialog_cancel, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { /* User clicked No so do some stuff */ } }) .create(); case DIALOG_MULTIPLE_CHOICE: return new AlertDialog.Builder(AlertDialogSamples.this) .setIcon(R.drawable.ic_popup_reminder) .setTitle(R.string.alert_dialog_multi_choice) .setMultiChoiceItems(R.array.select_dialog_items3, new boolean[]{false, true, false, true, false, false, false}, new DialogInterface.OnMultiChoiceClickListener() { public void onClick(DialogInterface dialog, int whichButton, boolean isChecked) { /* User clicked on a check box do some stuff */ } }) .setPositiveButton(R.string.alert_dialog_ok, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { /* User clicked Yes so do some stuff */ } }) .setNegativeButton(R.string.alert_dialog_cancel, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { /* User clicked No so do some stuff */ } }) .create(); case DIALOG_MULTIPLE_CHOICE_CURSOR: String[] projection = new String[] { Contacts.People._ID, Contacts.People.NAME, Contacts.People.SEND_TO_VOICEMAIL }; Cursor cursor = managedQuery(Contacts.People.CONTENT_URI, projection, null, null, null); return new AlertDialog.Builder(AlertDialogSamples.this) .setIcon(R.drawable.ic_popup_reminder) .setTitle(R.string.alert_dialog_multi_choice_cursor) .setMultiChoiceItems(cursor, Contacts.People.SEND_TO_VOICEMAIL, Contacts.People.NAME, new DialogInterface.OnMultiChoiceClickListener() { public void onClick(DialogInterface dialog, int whichButton, boolean isChecked) { Toast.makeText(AlertDialogSamples.this, "Readonly Demo Only - Data will not be updated", Toast.LENGTH_SHORT).show(); } }) .create(); case DIALOG_TEXT_ENTRY: // This example shows how to add a custom layout to an AlertDialog LayoutInflater factory = LayoutInflater.from(this); final View textEntryView = factory.inflate(R.layout.alert_dialog_text_entry, null); return new AlertDialog.Builder(AlertDialogSamples.this) .setIcon(R.drawable.alert_dialog_icon) .setTitle(R.string.alert_dialog_text_entry) .setView(textEntryView) .setPositiveButton(R.string.alert_dialog_ok, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { /* User clicked OK so do some stuff */ } }) .setNegativeButton(R.string.alert_dialog_cancel, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { /* User clicked cancel so do some stuff */ } }) .create(); } return null; } /** * Initialization of the Activity after it is first created. Must at least * call {@link android.app.Activity#setContentView(int)} to * describe what is to be displayed in the screen. */ @Overrideprotected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.alert_dialog); /* Display a text message with yes/no buttons and handle each message as well as the cancel action */ Button twoButtonsTitle = (Button) findViewById(R.id.two_buttons); twoButtonsTitle.setOnClickListener(new OnClickListener() { public void onClick(View v) { showDialog(DIALOG_YES_NO_MESSAGE); } }); /* Display a long text message with yes/no buttons and handle each message as well as the cancel action */ Button twoButtons2Title = (Button) findViewById(R.id.two_buttons2); twoButtons2Title.setOnClickListener(new OnClickListener() { public void onClick(View v) { showDialog(DIALOG_YES_NO_LONG_MESSAGE); } }); /* Display a list of items */ Button selectButton = (Button) findViewById(R.id.select_button); selectButton.setOnClickListener(new OnClickListener() { public void onClick(View v) { showDialog(DIALOG_LIST); } }); /* Display a custom progress bar */ Button progressButton = (Button) findViewById(R.id.progress_button); progressButton.setOnClickListener(new OnClickListener() { public void onClick(View v) { showDialog(DIALOG_PROGRESS); mProgress = 0; mProgressDialog.setProgress(0); mProgressHandler.sendEmptyMessage(0); } }); /* Display a radio button group */ Button radioButton = (Button) findViewById(R.id.radio_button); radioButton.setOnClickListener(new OnClickListener() { public void onClick(View v) { showDialog(DIALOG_SINGLE_CHOICE); } }); /* Display a list of checkboxes */ Button checkBox = (Button) findViewById(R.id.checkbox_button); checkBox.setOnClickListener(new OnClickListener() { public void onClick(View v) { showDialog(DIALOG_MULTIPLE_CHOICE); } }); /* Display a list of checkboxes, backed by a cursor */ Button checkBox2 = (Button) findViewById(R.id.checkbox_button2); checkBox2.setOnClickListener(new OnClickListener() { public void onClick(View v) { showDialog(DIALOG_MULTIPLE_CHOICE_CURSOR); } }); /* Display a text entry dialog */ Button textEntry = (Button) findViewById(R.id.text_entry_button); textEntry.setOnClickListener(new OnClickListener() { public void onClick(View v) { showDialog(DIALOG_TEXT_ENTRY); } }); mProgressHandler = new Handler() { @Override public void handleMessage(Message msg) { super.handleMessage(msg); if (mProgress >= MAX_PROGRESS) { mProgressDialog.dismiss(); } else { mProgress++; mProgressDialog.incrementProgressBy(1); mProgressHandler.sendEmptyMessageDelayed(0, 100); } } }; }}