轉載請註明出處:紅亮的專欄:http://blog.csdn.net/liang5630/article/details/44098899
Android中的對話框形式大致可分爲五種:分別是一般對話框形式,列表對話框形式,單選按鈕對話框,多選按鈕對話框,自定義對話框。
在實際開發中,用系統的對話框會很少,因爲太醜了,美工不願意,多是使用自定義對話框。當然學會系統的,自定義就簡單了,所以我們先來學習系統的,後面在寫一篇自定義對話框。
一般對話框:
不多說先上圖:
代碼:
- private void dialog1(){
- AlertDialog.Builder builder=new AlertDialog.Builder(this); //先得到構造器
- builder.setTitle("提示"); //設置標題
- builder.setMessage("是否確認退出?"); //設置內容
- builder.setIcon(R.mipmap.ic_launcher);//設置圖標,圖片id即可
- builder.setPositiveButton("確定", new DialogInterface.OnClickListener() { //設置確定按鈕
- @Override
- public void onClick(DialogInterface dialog, int which) {
- dialog.dismiss(); //關閉dialog
- Toast.makeText(MainActivity.this, "確認" + which, Toast.LENGTH_SHORT).show();
- }
- });
- builder.setNegativeButton("取消", new DialogInterface.OnClickListener() { //設置取消按鈕
- @Override
- public void onClick(DialogInterface dialog, int which) {
- dialog.dismiss();
- Toast.makeText(MainActivity.this, "取消" + which, Toast.LENGTH_SHORT).show();
- }
- });
- builder.setNeutralButton("忽略", new DialogInterface.OnClickListener() {//設置忽略按鈕
- @Override
- public void onClick(DialogInterface dialog, int which) {
- dialog.dismiss();
- Toast.makeText(MainActivity.this, "忽略" + which, Toast.LENGTH_SHORT).show();
- }
- });
- //參數都設置完成了,創建並顯示出來
- builder.create().show();
- }
是不是覺得三個按鈕寫了三遍響應事件,很繁瑣呢?注意:onClick的參數中有一個which,這個是什麼意思呢?這個which實際上代表的是一個唯一的int型數值。像上面的setPositiveButton中的which代表的是-1,setNegativeButton中的which代表的是-3,setNeutralButton中的which代表的是-2. 到了這裏相信大家已經想到怎麼簡潔的寫法了,只要寫一個響應事件,用which參數去區分是那個按鈕就可以了!
看簡潔的代碼2:和上面的效果是一樣的!
- private void dialog1_1(){
- //先new出一個監聽器,設置好監聽
- DialogInterface.OnClickListener dialogOnclicListener=new DialogInterface.OnClickListener(){
- @Override
- public void onClick(DialogInterface dialog, int which) {
- switch(which){
- case Dialog.BUTTON_POSITIVE:
- Toast.makeText(MainActivity.this, "確認" + which, Toast.LENGTH_SHORT).show();
- break;
- case Dialog.BUTTON_NEGATIVE:
- Toast.makeText(MainActivity.this, "取消" + which, Toast.LENGTH_SHORT).show();
- break;
- case Dialog.BUTTON_NEUTRAL:
- Toast.makeText(MainActivity.this, "忽略" + which, Toast.LENGTH_SHORT).show();
- break;
- }
- }
- };
- //dialog參數設置
- AlertDialog.Builder builder=new AlertDialog.Builder(this); //先得到構造器
- builder.setTitle("提示"); //設置標題
- builder.setMessage("是否確認退出?"); //設置內容
- builder.setIcon(R.mipmap.ic_launcher);//設置圖標,圖片id即可
- builder.setPositiveButton("確認",dialogOnclicListener);
- builder.setNegativeButton("取消", dialogOnclicListener);
- builder.setNeutralButton("忽略", dialogOnclicListener);
- builder.create().show();
- }
列表對話框:
代碼:
- private void dialog2() {
- final String items[]={"張三","李四","王五"};
- //dialog參數設置
- AlertDialog.Builder builder=new AlertDialog.Builder(this); //先得到構造器
- builder.setTitle("提示"); //設置標題
- //builder.setMessage("是否確認退出?"); //設置內容
- builder.setIcon(R.mipmap.ic_launcher);//設置圖標,圖片id即可
- //設置列表顯示,注意設置了列表顯示就不要設置builder.setMessage()了,否則列表不起作用。
- builder.setItems(items,new DialogInterface.OnClickListener() {
- @Override
- public void onClick(DialogInterface dialog, int which) {
- dialog.dismiss();
- Toast.makeText(MainActivity.this, items[which], Toast.LENGTH_SHORT).show();
- }
- });
- builder.setPositiveButton("確定",new DialogInterface.OnClickListener() {
- @Override
- public void onClick(DialogInterface dialog, int which) {
- dialog.dismiss();
- Toast.makeText(MainActivity.this, "確定", Toast.LENGTH_SHORT).show();
- }
- });
- builder.create().show();
- }
說明:列表對話框只需設置Items屬性即可,注意不能在設置Message屬性,否則只會顯示Message,不會顯示列表。這裏的setItems中的Onclick中的which屬性是items數組的下標!
單選按鈕對話框:
代碼:
- private void dialog3(){
- final String items[]={"男","女"};
- AlertDialog.Builder builder=new AlertDialog.Builder(this); //先得到構造器
- builder.setTitle("提示"); //設置標題
- builder.setIcon(R.mipmap.ic_launcher);//設置圖標,圖片id即可
- builder.setSingleChoiceItems(items,0,new DialogInterface.OnClickListener() {
- @Override
- public void onClick(DialogInterface dialog, int which) {
- //dialog.dismiss();
- Toast.makeText(MainActivity.this, items[which], Toast.LENGTH_SHORT).show();
- }
- });
- builder.setPositiveButton("確定",new DialogInterface.OnClickListener() {
- @Override
- public void onClick(DialogInterface dialog, int which) {
- dialog.dismiss();
- Toast.makeText(MainActivity.this, "確定", Toast.LENGTH_SHORT).show();
- }
- });
- builder.create().show();
- }
說明:其實也沒什麼好說的,和上面的差不多,只是設置單選用setSingleChoiceItems,注意這裏的參數:items是顯示的文本,0表示默認選中是第一個,如圖所示是默認選中“男”。
多選列表對話框:
代碼:
- private void dialog4(){
- final String items[]={"籃球","足球","排球"};
- final boolean selected[]={true,false,true};
- AlertDialog.Builder builder=new AlertDialog.Builder(this); //先得到構造器
- builder.setTitle("提示"); //設置標題
- builder.setIcon(R.mipmap.ic_launcher);//設置圖標,圖片id即可
- builder.setMultiChoiceItems(items,selected,new DialogInterface.OnMultiChoiceClickListener() {
- @Override
- public void onClick(DialogInterface dialog, int which, boolean isChecked) {
- // dialog.dismiss();
- Toast.makeText(MainActivity.this, items[which]+isChecked, Toast.LENGTH_SHORT).show();
- }
- });
- builder.setPositiveButton("確定",new DialogInterface.OnClickListener() {
- @Override
- public void onClick(DialogInterface dialog, int which) {
- dialog.dismiss();
- Toast.makeText(MainActivity.this, "確定", Toast.LENGTH_SHORT).show();
- //android會自動根據你選擇的改變selected數組的值。
- for (int i=0;i<selected.length;i++){
- Log.e("hongliang",""+selected[i]);
- }
- }
- });
- builder.create().show();
- }
說明:setMultiChoiceItems中的參數:selected是默認的對應的選中狀態。當你選擇時,系統會自動幫你把selected中的值做相應改變,所以在確定按鈕中可以得到所有的選擇狀態。其他和單選一樣。
總結:要想更好的使用對話框,自定義對話框是少不了的,當然啦,要和activity通信,回調也是少不了的,後面會詳細介紹。不多說了,完整代碼來一份:
MainActivity.Java
- package com.example.liang.dialogdemo;
- import android.app.AlertDialog;
- import android.app.Dialog;
- import android.content.DialogInterface;
- import android.os.Bundle;
- import android.support.v7.app.ActionBarActivity;
- import android.util.Log;
- import android.view.View;
- import android.widget.Button;
- import android.widget.Toast;
- public class MainActivity extends ActionBarActivity implements View.OnClickListener{
- private Button btn1;
- private Button btn2;
- private Button btn3;
- private Button btn4;
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
- btn1= (Button) findViewById(R.id.main_btn1);
- btn1.setOnClickListener(this);
- btn2= (Button) findViewById(R.id.main_btn2);
- btn2.setOnClickListener(this);
- btn3= (Button) findViewById(R.id.main_btn3);
- btn3.setOnClickListener(this);
- btn4= (Button) findViewById(R.id.main_btn4);
- btn4.setOnClickListener(this);
- }
- private void dialog1(){
- AlertDialog.Builder builder=new AlertDialog.Builder(this); //先得到構造器
- builder.setTitle("提示"); //設置標題
- builder.setMessage("是否確認退出?"); //設置內容
- builder.setIcon(R.mipmap.ic_launcher);//設置圖標,圖片id即可
- builder.setPositiveButton("確定", new DialogInterface.OnClickListener() { //設置確定按鈕
- @Override
- public void onClick(DialogInterface dialog, int which) {
- dialog.dismiss(); //關閉dialog
- Toast.makeText(MainActivity.this, "確認" + which, Toast.LENGTH_SHORT).show();
- }
- });
- builder.setNegativeButton("取消", new DialogInterface.OnClickListener() { //設置取消按鈕
- @Override
- public void onClick(DialogInterface dialog, int which) {
- dialog.dismiss();
- Toast.makeText(MainActivity.this, "取消" + which, Toast.LENGTH_SHORT).show();
- }
- });
- builder.setNeutralButton("忽略", new DialogInterface.OnClickListener() {//設置忽略按鈕
- @Override
- public void onClick(DialogInterface dialog, int which) {
- dialog.dismiss();
- Toast.makeText(MainActivity.this, "忽略" + which, Toast.LENGTH_SHORT).show();
- }
- });
- //參數都設置完成了,創建並顯示出來
- builder.create().show();
- }
- private void dialog1_1(){
- //先new出一個監聽器,設置好監聽
- DialogInterface.OnClickListener dialogOnclicListener=new DialogInterface.OnClickListener(){
- @Override
- public void onClick(DialogInterface dialog, int which) {
- switch(which){
- case Dialog.BUTTON_POSITIVE:
- Toast.makeText(MainActivity.this, "確認" + which, Toast.LENGTH_SHORT).show();
- break;
- case Dialog.BUTTON_NEGATIVE:
- Toast.makeText(MainActivity.this, "取消" + which, Toast.LENGTH_SHORT).show();
- break;
- case Dialog.BUTTON_NEUTRAL:
- Toast.makeText(MainActivity.this, "忽略" + which, Toast.LENGTH_SHORT).show();
- break;
- }
- }
- };
- //dialog參數設置
- AlertDialog.Builder builder=new AlertDialog.Builder(this); //先得到構造器
- builder.setTitle("提示"); //設置標題
- builder.setMessage("是否確認退出?"); //設置內容
- builder.setIcon(R.mipmap.ic_launcher);//設置圖標,圖片id即可
- builder.setPositiveButton("確認",dialogOnclicListener);
- builder.setNegativeButton("取消", dialogOnclicListener);
- builder.setNeutralButton("忽略", dialogOnclicListener);
- builder.create().show();
- }
- private void dialog2() {
- final String items[]={"張三","李四","王五"};
- //dialog參數設置
- AlertDialog.Builder builder=new AlertDialog.Builder(this); //先得到構造器
- builder.setTitle("提示"); //設置標題
- //builder.setMessage("是否確認退出?"); //設置內容
- builder.setIcon(R.mipmap.ic_launcher);//設置圖標,圖片id即可
- //設置列表顯示,注意設置了列表顯示就不要設置builder.setMessage()了,否則列表不起作用。
- builder.setItems(items,new DialogInterface.OnClickListener() {
- @Override
- public void onClick(DialogInterface dialog, int which) {
- dialog.dismiss();
- Toast.makeText(MainActivity.this, items[which], Toast.LENGTH_SHORT).show();
- }
- });
- builder.setPositiveButton("確定",new DialogInterface.OnClickListener() {
- @Override
- public void onClick(DialogInterface dialog, int which) {
- dialog.dismiss();
- Toast.makeText(MainActivity.this, "確定", Toast.LENGTH_SHORT).show();
- }
- });
- builder.create().show();
- }
- private void dialog3(){
- final String items[]={"男","女"};
- AlertDialog.Builder builder=new AlertDialog.Builder(this); //先得到構造器
- builder.setTitle("提示"); //設置標題
- builder.setIcon(R.mipmap.ic_launcher);//設置圖標,圖片id即可
- builder.setSingleChoiceItems(items,0,new DialogInterface.OnClickListener() {
- @Override
- public void onClick(DialogInterface dialog, int which) {
- //dialog.dismiss();
- Toast.makeText(MainActivity.this, items[which], Toast.LENGTH_SHORT).show();
- }
- });
- builder.setPositiveButton("確定",new DialogInterface.OnClickListener() {
- @Override
- public void onClick(DialogInterface dialog, int which) {
- dialog.dismiss();
- Toast.makeText(MainActivity.this, "確定", Toast.LENGTH_SHORT).show();
- }
- });
- builder.create().show();
- }
- private void dialog4(){
- final String items[]={"籃球","足球","排球"};
- final boolean selected[]={true,false,true};
- AlertDialog.Builder builder=new AlertDialog.Builder(this); //先得到構造器
- builder.setTitle("提示"); //設置標題
- builder.setIcon(R.mipmap.ic_launcher);//設置圖標,圖片id即可
- builder.setMultiChoiceItems(items,selected,new DialogInterface.OnMultiChoiceClickListener() {
- @Override
- public void onClick(DialogInterface dialog, int which, boolean isChecked) {
- // dialog.dismiss();
- Toast.makeText(MainActivity.this, items[which]+isChecked, Toast.LENGTH_SHORT).show();
- }
- });
- builder.setPositiveButton("確定",new DialogInterface.OnClickListener() {
- @Override
- public void onClick(DialogInterface dialog, int which) {
- dialog.dismiss();
- Toast.makeText(MainActivity.this, "確定", Toast.LENGTH_SHORT).show();
- //android會自動根據你選擇的改變selected數組的值。
- for (int i=0;i<selected.length;i++){
- Log.e("hongliang",""+selected[i]);
- }
- }
- });
- builder.create().show();
- }
- @Override
- public void onClick(View v) {
- switch (v.getId()){
- case R.id.main_btn1:
- // dialog1();
- dialog1_1();//等同與上面的dialog1(),比之更簡潔,推薦
- break;
- case R.id.main_btn2:
- dialog2();
- break;
- case R.id.main_btn3:
- dialog3();
- break;
- case R.id.main_btn4:
- dialog4();
- break;
- }
- }
- }
- <LinearLayout 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:orientation="vertical"
- 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/main_btn1"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="普通對話框" />
- <Button
- android:id="@+id/main_btn2"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="列表對話框" />
- <Button
- android:id="@+id/main_btn3"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="單選列表對話框" />
- <Button
- android:id="@+id/main_btn4"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="多選列表對話框" />
- </LinearLayout>