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創(chuàng)建AlertDialog的步驟： 1、創(chuàng)建AlertDialog.Builder對象 2、調(diào)用Builder對象的setTitle方法設(shè)置標(biāo)題，setIcon方法設(shè)置圖標(biāo) 3、調(diào)用Builder相關(guān)方法如setMessage方法、setItems方法、setSingleChoiceItems方法、setMultiChoiceItems方法、setAdapter方法、setView方法設(shè)置不同類型的對話框內(nèi)容。 4、調(diào)用setPositiveButton、setNegativeButton、setNeutralButton設(shè)置多個按鈕 5、調(diào)用Builder對象的create()方法創(chuàng)建AlertDialog對象 6、調(diào)用AlertDialog對象的show()方法將對話框顯示出來 一、setMessage：設(shè)置對話框內(nèi)容為簡單文本內(nèi)容  // 創(chuàng)建構(gòu)建器 AlertDialog.Builder builder = new AlertDialog.Builder(this); // 設(shè)置參數(shù) builder.setTitle("請做出選擇").setIcon(R.drawable.ic_launcher) .setMessage("我美不美") .setPositiveButton("美", new OnClickListener() {// 積極 @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub Toast.makeText(MainActivity.this, "恭喜你答對了", 0) .show(); } }).setNegativeButton("不美", new OnClickListener() {// 消極 @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub Toast.makeText(MainActivity.this, "一點(diǎn)也不老實", 0) .show(); } }).setNeutralButton("不知道", new OnClickListener() {// 中間級 @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub Toast.makeText(MainActivity.this, "快睜開眼瞅瞅", 0) .show(); } }); builder.create().show(); 運(yùn)行截圖： 二、setItem：設(shè)置文本框內(nèi)容為簡單列表項
// 創(chuàng)建數(shù)據(jù) final String[] items = new String[] { "北京", "上海", "廣州", "深圳" }; // 創(chuàng)建對話框構(gòu)建器 AlertDialog.Builder builder = new AlertDialog.Builder(this); // 設(shè)置參數(shù) builder.setIcon(R.drawable.ic_launcher).setTitle("提示") .setItems(items, new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Toast.makeText(MainActivity.this, items[which], Toast.LENGTH_SHORT).show(); } }); builder.create().show(); 運(yùn)行截圖：
三、setSingleChoiceItems()設(shè)置對話框內(nèi)容為單選列表項 // 創(chuàng)建數(shù)據(jù) final String[] items = new String[] { "北京", "上海", "廣州", "深圳" }; // 創(chuàng)建對話框構(gòu)建器 AlertDialog.Builder builder = new AlertDialog.Builder(this); // 設(shè)置參數(shù) builder.setIcon(R.drawable.ic_launcher).setTitle("提示") .setSingleChoiceItems(items, 0, new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub Toast.makeText(MainActivity.this, items[which], Toast.LENGTH_SHORT).show(); } }); builder.create().show(); 運(yùn)行截圖： 四、setMultiChoiceItems()設(shè)置對話框內(nèi)容為多選項列表 // 創(chuàng)建數(shù)據(jù) final String[] items = new String[] { "北京", "上海", "廣州", "深圳" }; // 創(chuàng)建對話框構(gòu)建器 AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setIcon(R.drawable.ic_launcher) .setTitle("提示") .setMultiChoiceItems(items, new boolean[] { true, true, false, false, false }, new OnMultiChoiceClickListener() { @Override public void onClick(DialogInterface dialog, int which, boolean isChecked) { // TODO Auto-generated method stub if (isChecked) { Toast.makeText(MainActivity.this, items[which], 0).show(); } } }); builder.create().show();  運(yùn)行截圖： 五、setAdapter()設(shè)置對話框內(nèi)容為自定義列表項（這里是一個布局） // 創(chuàng)建數(shù)據(jù) final String[] items = new String[] { "北京", "上海", "廣州", "深圳" }; // 創(chuàng)建對話框構(gòu)建器 AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle("提示") .setIcon(R.drawable.ic_launcher) .setAdapter( new ArrayAdapter<String>(MainActivity.this, R.layout.item, R.id.tv, items), new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub Toast.makeText(MainActivity.this, items[which], 0).show(); } }); builder.create().show(); 運(yùn)行截圖： 六、setView()設(shè)置對話框為自定義View // 創(chuàng)建對話框構(gòu)建器 AlertDialog.Builder builder = new AlertDialog.Builder(this); // 獲取布局 View view2 = View.inflate(MainActivity.this, R.layout.login, null); // 獲取布局中的控件 final EditText username = (EditText) view2.findViewById(R.id.username); final EditText password = (EditText) view2.findViewById(R.id.password); final Button button = (Button) view2.findViewById(R.id.btn_login); // 設(shè)置參數(shù) builder.setTitle("Login").setIcon(R.drawable.ic_launcher) .setView(view2); // 創(chuàng)建對話框 final AlertDialog alertDialog = builder.create(); button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub String uname = username.getText().toString().trim(); String psd = password.getText().toString().trim(); if (uname.equals("shenhua") && psd.equals("123456")) { Toast.makeText(MainActivity.this, "登錄成功", 0).show(); } Toast.makeText(MainActivity.this, "登錄失敗", 0).show(); alertDialog.dismiss();// 對話框消失 } }); alertDialog.show(); 運(yùn)行截圖：
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