本文围绕以下两个部分展开：
一、一个案例
1、主界面
2、对话框
3、列表对话框
4、单选对话框
5、多选对话框
6、自定义对话框
附 代码补充
一、一个案例
1、主界面
activity_main.xml ：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".MainActivity"> <Button android:id="@+id/btnAlertDialog" android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="onClick" android:text="@string/btn_alert_dialog"/> <Button android:id="@+id/btnListAlertDialog" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/btnAlertDialog" android:onClick="onClick" android:text="@string/btn_list_alert_dialog"/> <Button android:id="@+id/btnSingleListAlertDialog" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/btnListAlertDialog" android:onClick="onClick" android:text="@string/btn_single_list_alert_dialog"/> <Button android:id="@+id/btnMultiListAlertDialog" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/btnSingleListAlertDialog" android:onClick="onClick" android:text="@string/btn_multi_list_alert_dialog"/> <Button android:id="@+id/btnCustomDialog" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/btnMultiListAlertDialog" android:onClick="onClick" android:text="@string/btn_custom_dialog"/> </RelativeLayout>
2、对话框
private void alertDialog() { // Builder 模式：建造者模式 // AlertDialog 的构造方法【受保护】，使用 Builder 创建对话框 AlertDialog.Builder builder = new AlertDialog.Builder(this); // 设置对话框的图标 / 标题 / 内容 builder.setIcon(R.mipmap.ic_launcher); builder.setTitle(getString(R.string.app_name)); builder.setMessage("夜深了~~~"); // 不可取消【默认 true】 builder.setCancelable(false); // 设置按钮：确定、取消、中立【显示的位置固定】 builder.setPositiveButton(R.string.button_ok, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { showToast("OK Button."); } }); builder.setNegativeButton(R.string.button_cancel, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { showToast("Cancel Button."); } }); builder.setNeutralButton(R.string.button_neutral, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { showToast("Neutral Button."); } }); // 创建对话框 AlertDialog dialog = builder.create(); dialog.show(); }3、列表对话框
private void listAlertDialog() { AlertDialog.Builder builder = new AlertDialog.Builder(this); // 设置对话框的图标 / 标题 builder.setIcon(R.mipmap.ic_launcher); builder.setTitle(getString(R.string.btn_list_alert_dialog)); // 参数一:数据 // 参数二:选项的事件 builder.setItems(items, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // 点击哪个选项就显示此选项 (which - 字符串数组的下标) showToast(items[which]); } }); // 设置 取消 按钮,无监听事件 builder.setNegativeButton(R.string.button_cancel, null); AlertDialog dialog = builder.create(); dialog.show(); }4、单选对话框
private void singleListAlertDialog() { AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setIcon(R.mipmap.ic_launcher); builder.setTitle(getString(R.string.btn_single_list_alert_dialog)); // 参数一：列表中的数据集 // 参数二：默认选中的位置，-1 无默认选中项 builder.setSingleChoiceItems(items, -1, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // 点击哪个选项就显示此选项 (which - 字符串数组的下标) showToast(items[which]); } }); builder.setNegativeButton(R.string.button_cancel, null); builder.setPositiveButton(R.string.button_ok, null); AlertDialog dialog = builder.create(); dialog.show(); }5、多选对话框
private void multiListAlertDialog() { AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setIcon(R.mipmap.ic_launcher); builder.setTitle(getString(R.string.btn_multi_list_alert_dialog)); builder.setCancelable(false); final boolean[] checkedItems = new boolean[items.length]; // 参数一：列表中的数据集 // 参数二：列表中各项的状态（true 为选中、false 为未选中） // 参数三：多选监听器 builder.setMultiChoiceItems(items, checkedItems, new DialogInterface.OnMultiChoiceClickListener() { @Override public void onClick(DialogInterface dialog, int which, boolean isChecked) { checkedItems[which] = isChecked; } }); builder.setPositiveButton(R.string.button_ok, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { String text = ""; for (int i = 0; i < items.length; i++) { if (checkedItems[i]) { text += items[i] + ","; } } if (text.length() > 0) { text = text.substring(0, text.length() - 1); } else { text = "你还没有选呢~"; } showToast(text + "\n" + Arrays.toString(checkedItems)); } }); AlertDialog dialog = builder.create(); dialog.show(); }6、自定义对话框
（1）dialog_custom.xml ：
<?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:orientation="vertical" android:padding="@dimen/activity_horizontal_margin"> <EditText android:id="@+id/txtName" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="@string/hint_name"/> <EditText android:id="@+id/txtPassword" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="@string/hint_password" android:inputType="textPassword"/> </LinearLayout>
（2）
private void customDialog() { AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setIcon(R.mipmap.ic_launcher); builder.setTitle(getString(R.string.btn_custom_dialog)); // 使用指定布局文件填充视图 View view = this.getLayoutInflater().inflate( R.layout.dialog_custom, null); txtName = (EditText) view.findViewById(R.id.txtName); txtPassword = (EditText) view.findViewById(R.id.txtPassword); // 设置对话框的视图 builder.setView(view); builder.setNegativeButton(R.string.button_cancel, null); builder.setPositiveButton(R.string.button_ok, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { String name = txtName.getText().toString(); String password = txtPassword.getText().toString(); showToast(name + "\n" + password); } }); AlertDialog dialog = builder.create(); dialog.show(); }附 代码补充
1. styles.xml(v21) ：
<?xml version="1.0" encoding="utf-8"?> <resources> <style name="AppTheme" parent="android:Theme.Material.Light"> <item name="android:colorPrimaryDark">@android:color/holo_blue_dark</item> <item name="android:colorPrimary">@android:color/holo_blue_light</item> <item name="android:navigationBarColor">@android:color/transparent</item> </style> </resources>
2. strings.xml ：
<resources> <string name="app_name">Dialog</string> <string name="action_settings">Settings</string> <string name="btn_alert_dialog">对话框</string> <string name="btn_list_alert_dialog">列表对话框</string> <string name="btn_single_list_alert_dialog">单选列表对话框</string> <string name="btn_multi_list_alert_dialog">多选列表对话框</string> <string name="btn_custom_dialog">自定义对话框</string> <string name="button_ok">确定</string> <string name="button_cancel">取消</string> <string name="button_neutral">了解更多</string> <string name="hint_name">网络名</string> <string name="hint_password">密码</string> <string-array name="skills"> <item>Android</item> <item>iOS</item> <item>Windows</item> <item>Web</item> <item>C/C++</item> </string-array> </resources>
3. MainActivity ：
package com.android.dialog; import android.app.Activity; import android.app.AlertDialog; import android.content.DialogInterface; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.EditText; import android.widget.Toast; import java.util.Arrays; public class MainActivity extends Activity { private String[] items; private EditText txtName; private EditText txtPassword; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // 通过读取资源文件 strings.xml 获得指定的字符串数组 items = this.getResources().getStringArray(R.array.skills); } public void onClick(View view) { switch (view.getId()) { case R.id.btnAlertDialog: alertDialog(); break; case R.id.btnListAlertDialog: listAlertDialog(); break; case R.id.btnSingleListAlertDialog: singleListAlertDialog(); break; case R.id.btnMultiListAlertDialog: multiListAlertDialog(); break; case R.id.btnCustomDialog: customDialog(); break; } } private void customDialog() { AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setIcon(R.mipmap.ic_launcher); builder.setTitle(getString(R.string.btn_custom_dialog)); // 使用指定布局文件填充视图 View view = this.getLayoutInflater().inflate( R.layout.dialog_custom, null); txtName = (EditText) view.findViewById(R.id.txtName); txtPassword = (EditText) view.findViewById(R.id.txtPassword); // 设置对话框的视图 builder.setView(view); builder.setNegativeButton(R.string.button_cancel, null); builder.setPositiveButton(R.string.button_ok, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { String name = txtName.getText().toString(); String password = txtPassword.getText().toString(); showToast(name + "\n" + password); } }); AlertDialog dialog = builder.create(); dialog.show(); } private void multiListAlertDialog() { AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setIcon(R.mipmap.ic_launcher); builder.setTitle(getString(R.string.btn_multi_list_alert_dialog)); builder.setCancelable(false); final boolean[] checkedItems = new boolean[items.length]; // 参数一：列表中的数据集 // 参数二：列表中各项的状态（true 为选中、false 为未选中） // 参数三：多选监听器 builder.setMultiChoiceItems(items, checkedItems, new DialogInterface.OnMultiChoiceClickListener() { @Override public void onClick(DialogInterface dialog, int which, boolean isChecked) { checkedItems[which] = isChecked; } }); builder.setPositiveButton(R.string.button_ok, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { String text = ""; for (int i = 0; i < items.length; i++) { if (checkedItems[i]) { text += items[i] + ","; } } if (text.length() > 0) { text = text.substring(0, text.length() - 1); } else { text = "你还没有选呢~"; } showToast(text + "\n" + Arrays.toString(checkedItems)); } }); AlertDialog dialog = builder.create(); dialog.show(); } private void singleListAlertDialog() { AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setIcon(R.mipmap.ic_launcher); builder.setTitle(getString(R.string.btn_single_list_alert_dialog)); // 参数一：列表中的数据集 // 参数二：默认选中的位置，-1 无默认选中项 builder.setSingleChoiceItems(items, -1, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // 点击哪个选项就显示此选项 (which - 字符串数组的下标) showToast(items[which]); } }); builder.setNegativeButton(R.string.button_cancel, null); builder.setPositiveButton(R.string.button_ok, null); AlertDialog dialog = builder.create(); dialog.show(); } private void listAlertDialog() { AlertDialog.Builder builder = new AlertDialog.Builder(this); // 设置对话框的图标 / 标题 / 内容 builder.setIcon(R.mipmap.ic_launcher); builder.setTitle(getString(R.string.btn_list_alert_dialog)); // 参数一:数据 // 参数二:选项的事件 builder.setItems(items, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // 点击哪个选项就显示此选项 (which - 字符串数组的下标) showToast(items[which]); } }); // 设置 取消 按钮,无监听事件 builder.setNegativeButton(R.string.button_cancel, null); AlertDialog dialog = builder.create(); dialog.show(); } private void alertDialog() { // Builder 模式：建造者模式 // AlertDialog 的构造方法【受保护】，使用 Builder 创建对话框 AlertDialog.Builder builder = new AlertDialog.Builder(this); // 设置对话框的图标 / 标题 / 内容 builder.setIcon(R.mipmap.ic_launcher); builder.setTitle(getString(R.string.app_name)); builder.setMessage("夜深了~~~"); // 不可取消【默认 true】 builder.setCancelable(false); // 设置按钮：确定、取消、中立【显示的位置固定】 builder.setPositiveButton(R.string.button_ok, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { showToast("OK Button."); } }); builder.setNegativeButton(R.string.button_cancel, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { showToast("Cancel Button."); } }); builder.setNeutralButton(R.string.button_neutral, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { showToast("Neutral Button."); } }); // 创建对话框 AlertDialog dialog = builder.create(); dialog.show(); } private void showToast(String text) { Toast.makeText(this, text, Toast.LENGTH_SHORT).show(); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.menu_main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); //noinspection SimplifiableIfStatement if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } }