Android项目中的对话框

    在一般的Android项目中我们经常会遇到对话框，比如提示对话框、列表对话框、选择对话框、自定义对话框等。在实现方面，Android起始已经提供了相应的接口DialogBuilder。下面我将对常见的几种对话框进行描述。

    首先是提示信息对话框：

AlertDialog.Builder builder = new AlertDialog.Builder(this);// 设置标题builder.setTitle("删除");builder.setMessage("确认要删除吗？");builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {Toast.makeText(MainActivity.this, "你已删除", Toast.LENGTH_LONG).show();}});builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {Toast.makeText(MainActivity.this, "你已取消", Toast.LENGTH_LONG).show();}});// 设置是否按任意键退出builder.setCancelable(false);builder.show();

   

    普通列表选择对话框：

AlertDialog.Builder builder = new AlertDialog.Builder(this);builder.setTitle("请选择");final String[] fluit = { "香蕉", "苹果", "橘子", "西瓜", "柠檬", "荔枝" };builder.setItems(fluit, new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {Toast.makeText(MainActivity.this, fluit[which],Toast.LENGTH_LONG).show();}});builder.show();

    单选选择对话框：

AlertDialog.Builder builder = new AlertDialog.Builder(this);builder.setTitle("请选择");final String[] fluit = { "香蕉", "苹果", "橘子", "西瓜", "柠檬", "荔枝" };// 设置单选项目builder.setSingleChoiceItems(fluit, -1,new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {Toast.makeText(MainActivity.this, fluit[which],Toast.LENGTH_LONG).show();dialog.cancel();}});builder.show();

   多选选择对话框：

final AlertDialog.Builder builder = new AlertDialog.Builder(this);builder.setTitle("请选择");final String[] fluit = { "香蕉", "苹果", "橘子", "西瓜", "柠檬", "荔枝" };// 设置多选项目builder.setMultiChoiceItems(fluit, null,new DialogInterface.OnMultiChoiceClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which,boolean isChecked) {Toast.makeText(MainActivity.this, fluit[which],Toast.LENGTH_LONG).show();}});builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {dialog.cancel();}

 

    自定义对话框：

    首先要设置一个自定义的布局：

<?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" >    <EditText        android:id="@+id/editText1"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:hint="@string/user_name"        android:ems="10" >    </EditText>    <EditText        android:id="@+id/editText2"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:hint="@string/password"        android:ems="10"        android:inputType="textPassword" /></LinearLayout>

   然后在MainActivity类里面实现如下代码：

AlertDialog.Builder builder = new AlertDialog.Builder(this);// 设置标题builder.setTitle("自定义对话框");LayoutInflater inflater = this.getLayoutInflater();// 设置自定义布局View view = inflater.inflate(R.layout.view, null);builder.setView(view);final EditText username = (EditText) view.findViewById(R.id.editText1);final EditText password = (EditText) view.findViewById(R.id.editText2);// 单击确定按钮显示EditText文本内容builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {Toast.makeText(MainActivity.this,username.getText().toString() + "\n"+ password.getText().toString(),Toast.LENGTH_LONG).show();}

 

    布局文件完整代码如下：

<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/button1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentLeft="true"        android:layout_alignParentRight="true"        android:layout_alignParentTop="true"        android:layout_marginTop="14dp"        android:text="@string/btn1" >    </Button>    <Button        android:id="@+id/button2"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignLeft="@+id/button1"        android:layout_alignRight="@+id/button1"        android:layout_below="@+id/button1"        android:text="@string/btn2" />    <Button        android:id="@+id/button3"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignLeft="@+id/button2"        android:layout_alignRight="@+id/button2"        android:layout_below="@+id/button2"        android:text="@string/btn3" />    <Button        android:id="@+id/button4"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignLeft="@+id/button3"        android:layout_alignRight="@+id/button3"        android:layout_below="@+id/button3"        android:text="@string/btn4" />    <Button        android:id="@+id/button5"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignLeft="@+id/button4"        android:layout_alignRight="@+id/button4"        android:layout_below="@+id/button4"        android:text="@string/btn5" /></RelativeLayout>

 

    MainActivity类里面的完整代码如下：

package com.demo13_alterdialog;import android.os.Bundle;import android.app.Activity;import android.app.AlertDialog;import android.content.DialogInterface;import android.view.LayoutInflater;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;import android.widget.Toast;/** * 对话框测试类 *  * @author 刘永浪 *  */public class MainActivity extends Activity implements OnClickListener {private Button btn1;private Button btn2;private Button btn3;private Button btn4;private Button btn5;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);btn1 = (Button) findViewById(R.id.button1);btn2 = (Button) findViewById(R.id.button2);btn3 = (Button) findViewById(R.id.button3);btn4 = (Button) findViewById(R.id.button4);btn5 = (Button) findViewById(R.id.button5);btn1.setOnClickListener(this);btn2.setOnClickListener(this);btn3.setOnClickListener(this);btn4.setOnClickListener(this);btn5.setOnClickListener(this);}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {getMenuInflater().inflate(R.menu.main, menu);return true;}@Overridepublic void onClick(View v) {switch (v.getId()) {case R.id.button1:btn1Click();break;case R.id.button2:btn2Click();break;case R.id.button3:btn3Click();break;case R.id.button4:btn4Click();break;case R.id.button5:btn5Click();break;}}// 自定义对话框测试private void btn5Click() {AlertDialog.Builder builder = new AlertDialog.Builder(this);// 设置标题builder.setTitle("自定义对话框");LayoutInflater inflater = this.getLayoutInflater();// 设置自定义布局View view = inflater.inflate(R.layout.view, null);builder.setView(view);final EditText username = (EditText) view.findViewById(R.id.editText1);final EditText password = (EditText) view.findViewById(R.id.editText2);// 单击确定按钮显示EditText文本内容builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {Toast.makeText(MainActivity.this,username.getText().toString() + "\n"+ password.getText().toString(),Toast.LENGTH_LONG).show();}});// 单击取消按钮取消操作builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {dialog.cancel();}});builder.show();}// 带多选的选择对话框private void btn4Click() {final AlertDialog.Builder builder = new AlertDialog.Builder(this);builder.setTitle("请选择");final String[] fluit = { "香蕉", "苹果", "橘子", "西瓜", "柠檬", "荔枝" };// 设置多选项目builder.setMultiChoiceItems(fluit, null,new DialogInterface.OnMultiChoiceClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which,boolean isChecked) {Toast.makeText(MainActivity.this, fluit[which],Toast.LENGTH_LONG).show();}});builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {dialog.cancel();}});builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {dialog.cancel();}});builder.show();}// 带单选的选择对话框private void btn3Click() {AlertDialog.Builder builder = new AlertDialog.Builder(this);builder.setTitle("请选择");final String[] fluit = { "香蕉", "苹果", "橘子", "西瓜", "柠檬", "荔枝" };// 设置单选项目builder.setSingleChoiceItems(fluit, -1,new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {Toast.makeText(MainActivity.this, fluit[which],Toast.LENGTH_LONG).show();dialog.cancel();}});builder.show();}// 普通列表选择对话框private void btn2Click() {AlertDialog.Builder builder = new AlertDialog.Builder(this);builder.setTitle("请选择");final String[] fluit = { "香蕉", "苹果", "橘子", "西瓜", "柠檬", "荔枝" };builder.setItems(fluit, new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {Toast.makeText(MainActivity.this, fluit[which],Toast.LENGTH_LONG).show();}});builder.show();}// 提示信息对话框private void btn1Click() {AlertDialog.Builder builder = new AlertDialog.Builder(this);// 设置标题builder.setTitle("删除");builder.setMessage("确认要删除吗？");builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {Toast.makeText(MainActivity.this, "你已删除", Toast.LENGTH_LONG).show();}});builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {Toast.makeText(MainActivity.this, "你已取消", Toast.LENGTH_LONG).show();}});// 设置是否按任意键退出builder.setCancelable(false);builder.show();}}

    strings.xml文件完整代码：

<?xml version="1.0" encoding="utf-8"?><resources>    <string name="app_name">Demo13_AlterDialog</string>    <string name="action_settings">Settings</string>    <string name="hello_world">Hello world!</string>    <string name="btn1">提示信息对话框</string>    <string name="btn2">普通列表选择对话框</string>    <string name="btn3">单选选择对话框</string>    <string name="btn4">多选选择对话框</string>    <string name="btn5">自定义对话框</string>    <string name="user_name">username</string>    <string name="password">password</string></resources>