Android学习笔记（九） android提供的各种对话框
-----------------------------各式各样的对话框---------------------------------------------
首先把整体的代码贴在下面，然后是局部的讲解：
可以先把程序跑出来，对照分部的内容边演示边学习
package com.android.study;
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.ContactsContract;
public class MainActivity extends Activity {
private static final int DIALOG_YES_NO_MESSAGE = 1;
private static final int DIALOG_YES_NO_LONG_MESSAGE = 2;
private static final int DIALOG_LIST = 3;
private static final int DIALOG_PROGRESS = 4;
private static final int DIALOG_SINGLE_CHOICE = 5;
private static final int DIALOG_MULTIPLE_CHOICE = 6;
private static final int DIALOG_TEXT_ENTRY = 7;
private static final int DIALOG_MULTIPLE_CHOICE_CURSOR = 8;
private static final int DIALOG_YES_NO_ULTRA_LONG_MESSAGE = 9;
private static final int DIALOG_YES_NO_OLD_SCHOOL_MESSAGE = 10;
private static final int DIALOG_YES_NO_HOLO_LIGHT_MESSAGE = 11;
private static final int MAX_PROGRESS = 100;
private ProgressDialog mProgressDialog;
private int mProgress;
private Handler mProgressHandler;
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case DIALOG_YES_NO_MESSAGE:
return new AlertDialog.Builder(MainActivity.this)
.setIconAttribute(android.R.attr.alertDialogIcon)
.setTitle(R.string.alert_dialog_two_buttons_title)
.setPositiveButton(R.string.alert_dialog_ok, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
}
})
.setNegativeButton(R.string.alert_dialog_cancel, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
/* User clicked Cancel so do some stuff */
}
})
.create();
case DIALOG_YES_NO_OLD_SCHOOL_MESSAGE:
return new AlertDialog.Builder(MainActivity.this, AlertDialog.THEME_TRADITIONAL)
.setIconAttribute(android.R.attr.alertDialogIcon)
.setTitle(R.string.alert_dialog_two_buttons_title)
.setPositiveButton(R.string.alert_dialog_ok, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
}
})
.setNegativeButton(R.string.alert_dialog_cancel, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
}
})
.create();
case DIALOG_YES_NO_HOLO_LIGHT_MESSAGE:
return new AlertDialog.Builder(MainActivity.this, AlertDialog.THEME_HOLO_LIGHT)
.setIconAttribute(android.R.attr.alertDialogIcon)
.setTitle(R.string.alert_dialog_two_buttons_title)
.setPositiveButton(R.string.alert_dialog_ok, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
}
})
.setNegativeButton(R.string.alert_dialog_cancel, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
}
})
.create();
case DIALOG_YES_NO_LONG_MESSAGE:
return new AlertDialog.Builder(MainActivity.this)
.setIconAttribute(android.R.attr.alertDialogIcon)
.setTitle(R.string.alert_dialog_two_buttons_msg)
.setMessage(R.string.alert_dialog_two_buttons2_msg)
.setPositiveButton(R.string.alert_dialog_ok, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
/* User clicked OK so do some stuff */
}
})
.setNeutralButton(R.string.alert_dialog_something, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
/* User clicked Something 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();
case DIALOG_YES_NO_ULTRA_LONG_MESSAGE:
return new AlertDialog.Builder(MainActivity.this)
.setIconAttribute(android.R.attr.alertDialogIcon)
.setTitle(R.string.alert_dialog_two_buttons_msg)
.setMessage(R.string.alert_dialog_two_buttons2ultra_msg)
.setPositiveButton(R.string.alert_dialog_ok, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
/* User clicked OK so do some stuff */
}
})
.setNeutralButton(R.string.alert_dialog_something, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
/* User clicked Something 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();
case DIALOG_LIST:
return new AlertDialog.Builder(MainActivity.this)
.setTitle(R.string.select_dialog)
.setItems(R.array.select_dialog_items, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
/* User clicked so do some stuff */
String[] items = getResources().getStringArray(R.array.select_dialog_items);
new AlertDialog.Builder(MainActivity.this)
.setMessage("You selected: " + which + " , " + items[which])
.show();
}
})
.create();
case DIALOG_PROGRESS:
mProgressDialog = new ProgressDialog(MainActivity.this);
mProgressDialog.setIconAttribute(android.R.attr.alertDialogIcon);
mProgressDialog.setTitle(R.string.select_dialog);
mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
mProgressDialog.setMax(MAX_PROGRESS);
mProgressDialog.setButton(DialogInterface.BUTTON_POSITIVE,
getText(R.string.alert_dialog_hide), new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
/* User clicked Yes so do some stuff */
}
});
mProgressDialog.setButton(DialogInterface.BUTTON_NEGATIVE,
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(MainActivity.this)
.setIconAttribute(android.R.attr.alertDialogIcon)
.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(MainActivity.this)
.setIcon(R.drawable.ic_launcher )
.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[] {
ContactsContract.Contacts._ID,
ContactsContract.Contacts.DISPLAY_NAME,
ContactsContract.Contacts.SEND_TO_VOICEMAIL
};
Cursor cursor = managedQuery(ContactsContract.Contacts.CONTENT_URI,
projection, null, null, null);
return new AlertDialog.Builder(MainActivity.this)
.setIcon(R.drawable.ic_launcher )
.setTitle(R.string.alert_dialog_multi_choice_cursor)
.setMultiChoiceItems(cursor,
ContactsContract.Contacts.SEND_TO_VOICEMAIL,
ContactsContract.Contacts.DISPLAY_NAME,
new DialogInterface.OnMultiChoiceClickListener() {
public void onClick(DialogInterface dialog, int whichButton,
boolean isChecked) {
Toast.makeText(MainActivity.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.entry, null);
return new AlertDialog.Builder(MainActivity.this)
.setIconAttribute(android.R.attr.alertDialogIcon)
.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.
*/
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
/* 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 an ultra long text message with yes/no buttons and handle each message as well as the cancel action */
Button twoButtons2UltraTitle = (Button) findViewById(R.id.two_buttons2ultra);
twoButtons2UltraTitle.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
showDialog(DIALOG_YES_NO_ULTRA_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);
}
});
/* Two points, in the traditional theme */
Button twoButtonsOldSchoolTitle = (Button) findViewById(R.id.two_buttons_old_school);
twoButtonsOldSchoolTitle.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
showDialog(DIALOG_YES_NO_OLD_SCHOOL_MESSAGE);
}
});
/* Two points, in the light holographic theme */
Button twoButtonsHoloLightTitle = (Button) findViewById(R.id.two_buttons_holo_light);
twoButtonsHoloLightTitle.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
showDialog(DIALOG_YES_NO_HOLO_LIGHT_MESSAGE);
}
});
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);
}
}
};
}
}----------------------好长的代码，看不懂呢------------------------------------------------------------------
那么我来逐一的讲解：
首先是最开始的主界面：这个界面主要是通过布局文件来进行构建：
下面就是布局文件：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<Button
android:id="@+id/two_buttons"
android:text="two buttons"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
/>
<Button
android:id="@+id/two_buttons2"
android:text="two buttons2"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
/>
<Button
android:id="@+id/two_buttons2ultra"
android:text="button2ultra"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
/>
<Button
android:id="@+id/select_button"
android:text="select_button"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
/>
<Button
android:id="@+id/progress_button"
android:text="progress_button"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
/>
<Button
android:id="@+id/radio_button"
android:text="radio button"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
/>
<Button
android:id="@+id/checkbox_button"
android:text="check box"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
/>
<Button
android:id="@+id/checkbox_button2"
android:text="check box 2"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
/>
<Button
android:id="@+id/text_entry_button"
android:text="entry button"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
/>
<Button
android:id="@+id/two_buttons_old_school"
android:text="tow buttons old school"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
/>
<Button
android:id="@+id/two_buttons_holo_light"
android:text="buttons holo light"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
/>
</LinearLayout>
这些不需要解释的，就是把引出对话框的按钮排列在主界面上：
对话框主要是通过onCreateDialog和showDialog进行创建和执行的，他们区分对话框主要是通过id，所以我们要提前设定id
private static final int DIALOG_YES_NO_MESSAGE = 1;
private static final int DIALOG_YES_NO_LONG_MESSAGE = 2;
private static final int DIALOG_LIST = 3;
private static final int DIALOG_PROGRESS = 4;
private static final int DIALOG_SINGLE_CHOICE = 5;
private static final int DIALOG_MULTIPLE_CHOICE = 6;
private static final int DIALOG_TEXT_ENTRY = 7;
private static final int DIALOG_MULTIPLE_CHOICE_CURSOR = 8;
private static final int DIALOG_YES_NO_ULTRA_LONG_MESSAGE = 9;
private static final int DIALOG_YES_NO_OLD_SCHOOL_MESSAGE = 10;
private static final int DIALOG_YES_NO_HOLO_LIGHT_MESSAGE = 11;然后在onCreateDialog里
可以t通过switch结构捕获不同的id，然后创建对应的对话框
下面我们一种一种的来看：
-------------少量提示信息和两个按钮的对话框-------------------------------------------------
通过按钮进行转入，所以要给按钮设置监听器：
Button twoButtonsTitle = (Button) findViewById(R.id.two_buttons);
twoButtonsTitle.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
showDialog(DIALOG_YES_NO_MESSAGE);
}
});所有的按钮基本上都这样设置监听器，故下面不再讲解。
case DIALOG_YES_NO_MESSAGE:
//AlertDialog是Dialog的一个直接子类，可以设置标题和信息，可以添加两到三个按钮
//不能够直接创建，一般通过如下格式利用builder进行创建
//positiveButton是最左边的按钮，negativeButton是最右边的按钮
return new AlertDialog.Builder(MainActivity.this)
.setIconAttribute(android.R.attr.alertDialogIcon)
.setTitle(R.string.alert_dialog_two_buttons_title)
.setPositiveButton(R.string.alert_dialog_ok, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
//左键被点击触发的事件
}
})
.setNegativeButton(R.string.alert_dialog_cancel, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
//右键被点击触发的事件
}
})
.create();
--------------有提示信息和三个按钮的对话框---------------------------------------------------------------
多了一个setNeutralButton ，中键的设置
case DIALOG_YES_NO_OLD_SCHOOL_MESSAGE:
return new AlertDialog.Builder(MainActivity.this, AlertDialog.THEME_TRADITIONAL)
.setIconAttribute(android.R.attr.alertDialogIcon)
.setTitle(R.string.alert_dialog_two_buttons_title)
.setPositiveButton(R.string.alert_dialog_ok, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
}
})
.setNegativeButton(R.string.alert_dialog_cancel, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
}
})
.create();
-------------------------------列表项的对话框-------------------------------------------------------------------
case DIALOG_LIST:
return new AlertDialog.Builder(MainActivity.this)
.setTitle(R.string.select_dialog)
.setItems(R.array.select_dialog_items, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
/* User clicked so do some stuff */
//要在资源中设置一个文本数组
String[] items = getResources().getStringArray(R.array.select_dialog_items);
//在选择设置另一个弹出的对话框对选择做出应答
new AlertDialog.Builder(MainActivity.this)
.setMessage("You selected: " + which + " , " + items[which])
.show();
}
})
.create();设置文本数组可能有的人不太熟悉：
strings xml文件
<string-array name="select_dialog_items">
<item> select1 item1 </item>
<item> select1 item2 </item>
<item> select1 item3 </item>
<item> select1 item4 </item>
<item> select1 item5 </item>
</string-array>which代表被点击的按钮的标号
-------------------------单选项和按钮对话框--------------------------------------------------
case DIALOG_SINGLE_CHOICE:
return new AlertDialog.Builder(MainActivity.this)
.setIconAttribute(android.R.attr.alertDialogIcon)
.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 */
}
})
.setSingleChoice () 的第一个参数是资源文本数组的id ， 第二个参数是初始的默认选项，-1代表无默认，第三个参数是监听器；
-------------------------多选项和按钮对话框----------------------------------------------------------------------------
case DIALOG_MULTIPLE_CHOICE:
return new AlertDialog.Builder(MainActivity.this)
.setIcon(R.drawable.ic_launcher )
.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();
不多废话，和单选项的基本一样。。
-------------------------文本出入的对话框--------------------------------------------------
<pre name="code" class="javascript">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.entry, null);
return new AlertDialog.Builder(MainActivity.this)
.setIconAttribute(android.R.attr.alertDialogIcon)
.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();LayoutInflater是用来查找xml布局文件，且对其进行实例化的，findById是具体找某个Layout中的一个控件