Android AlertDialog六種創建方式案例詳解
創建AlertDialog的步驟:
- 創建AlertDialog.Builder對象
- 調用Builder對象的setTitle方法設置標題,setIcon方法設置圖標
- 調用Builder相關方法如setMessage方法、setItems方法、setSingleChoiceItems方法、setMultiChoiceItems方法、setAdapter方法、setView方法設置不同類型的對話框內容。
- 調用setPositiveButton、setNegativeButton、setNeutralButton設置多個按鈕
- 調用Builder對象的create()方法創建AlertDialog對象
- 調用AlertDialog對象的show()方法將對話框顯示出來
一、setMessage:設置對話框內容為簡單文本內容
// 創建構建器 AlertDialog.Builder builder = new AlertDialog.Builder(this); // 設置參數 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, "恭喜你答對瞭", 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();
運行截圖:
二、setItem:設置文本框內容為簡單列表項
// 創建數據 final String[] items = new String[] { "北京", "上海", "廣州", "深圳" }; // 創建對話框構建器 AlertDialog.Builder builder = new AlertDialog.Builder(this); // 設置參數 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();
運行截圖:
三、setSingleChoiceItems()設置對話框內容為單選列表項
// 創建數據 final String[] items = new String[] { "北京", "上海", "廣州", "深圳" }; // 創建對話框構建器 AlertDialog.Builder builder = new AlertDialog.Builder(this); // 設置參數 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();
運行截圖:
四、setMultiChoiceItems()設置對話框內容為多選項列表
// 創建數據 final String[] items = new String[] { "北京", "上海", "廣州", "深圳" }; // 創建對話框構建器 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();
運行截圖:
五、setAdapter()設置對話框內容為自定義列表項(這裡是一個佈局)
// 創建數據 final String[] items = new String[] { "北京", "上海", "廣州", "深圳" }; // 創建對話框構建器 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();
運行截圖:
六、setView()設置對話框為自定義View
// 創建對話框構建器 AlertDialog.Builder builder = new AlertDialog.Builder(this); // 獲取佈局 View view2 = View.inflate(MainActivity.this, R.layout.login, null); // 獲取佈局中的控件 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); // 設置參數 builder.setTitle("Login").setIcon(R.drawable.ic_launcher) .setView(view2); // 創建對話框 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();
運行截圖:
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