Dialog是一种常见的控件。
设置对话框一般步骤如下：
1.实例化dialog
由于AlertDialog的构造函数的关系，不能直接实例化，需要利用Builder来实例化，如
AlertDialog.Builder customizeDialog =new AlertDialog.Builder(this);
2.设置对话框
设置除了指基本设置如title，messages，icon外，还指设置对话框的按钮，单选框，列表，复选框，view等。
customizeDialog.setTitle("我是一个自定义Dialog");
customizeDialog.setView(dialogView);
customizeDialog.setPositiveButton("确定",new DialogInterface.OnClickListener() {}
3.show
显示对话框。
常见的dialog。
a. 正常的dialog
private void showNormalDialog(){ /* @setIcon 设置对话框图标 * @setTitle 设置对话框标题 * @setMessage 设置对话框消息提示 * setXXX方法返回Dialog对象，因此可以链式设置属性 */ final AlertDialog.Builder normalDialog = new AlertDialog.Builder(this); normalDialog.setIcon(R.drawable.icon); normalDialog.setTitle("我是一个普通Dialog"); normalDialog.setMessage("你要点击哪一个按钮呢?"); normalDialog.setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { //...To-do } }); normalDialog.setNegativeButton("关闭", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { //...To-do } }); // 显示 normalDialog.show(); }
2.List dialog
private void showListDialog() { final String[] items = { "我是1","我是2","我是3","我是4" }; AlertDialog.Builder listDialog = new AlertDialog.Builder(this); listDialog.setTitle("我是一个列表Dialog"); listDialog.setItems(items, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // which 下标从0开始 // ...To-do Toast.makeText(getApplicationContext(), "你点击了" + items[which], Toast.LENGTH_SHORT).show(); } }); listDialog.show(); }
3.单选
private void showSingleChoiceDialog(){ final String[] items = { "我是1","我是2","我是3","我是4" }; yourChoice = -1; AlertDialog.Builder singleChoiceDialog = new AlertDialog.Builder(this); singleChoiceDialog.setTitle("我是一个单选Dialog"); // 第二个参数是默认选项，此处设置为0 singleChoiceDialog.setSingleChoiceItems(items, 0, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { yourChoice = which; } }); singleChoiceDialog.setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { if (yourChoice != -1) { Toast.makeText(getApplicationContext(), "你选择了" + items[yourChoice], Toast.LENGTH_SHORT).show(); } } }); singleChoiceDialog.show(); }
4.多选
ArrayList<Integer> yourChoices = new ArrayList<>(); private void showMultiChoiceDialog() { final String[] items = { "我是1","我是2","我是3","我是4" }; // 设置默认选中的选项，全为false默认均未选中 final boolean initChoiceSets[]={false,false,false,false}; yourChoices.clear(); AlertDialog.Builder multiChoiceDialog = new AlertDialog.Builder(this); multiChoiceDialog.setTitle("我是一个多选Dialog"); multiChoiceDialog.setMultiChoiceItems(items, initChoiceSets, new DialogInterface.OnMultiChoiceClickListener() { @Override public void onClick(DialogInterface dialog, int which, boolean isChecked) { if (isChecked) { yourChoices.add(which); } else { yourChoices.remove(which); } } }); multiChoiceDialog.setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { int size = yourChoices.size(); String str = ""; for (int i = 0; i < size; i++) { str += items[yourChoices.get(i)] + " "; } Toast.makeText(getApplicationContext(), "你选中了" + str, Toast.LENGTH_SHORT).show(); } }); multiChoiceDialog.show(); }
5.等待中
private void showWaitingDialog() { /* 等待Dialog具有屏蔽其他控件的交互能力 * @setCancelable 为使屏幕不可点击，设置为不可取消(false) * 下载等事件完成后，主动调用函数关闭该Dialog */ ProgressDialog waitingDialog= new ProgressDialog(this); waitingDialog.setTitle("我是一个等待Dialog"); waitingDialog.setMessage("等待中..."); waitingDialog.setIndeterminate(true); waitingDialog.setCancelable(false); waitingDialog.show(); }
6.输入
private void showInputDialog() { /*@setView 装入一个EditView */ final EditText editText = new EditText(this); AlertDialog.Builder inputDialog = new AlertDialog.Builder(this); inputDialog.setTitle("我是一个输入Dialog").setView(editText); inputDialog.setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Toast.makeText(getApplicationContext(), editText.getText().toString(), Toast.LENGTH_SHORT).show(); } }).show(); }
7.进度条
private void showProgressDialog() { /* @setProgress 设置初始进度 * @setProgressStyle 设置样式（水平进度条） * @setMax 设置进度最大值 */ final int MAX_PROGRESS = 100; final ProgressDialog progressDialog = new ProgressDialog(this); progressDialog.setProgress(0); progressDialog.setTitle("我是一个进度条Dialog"); progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); progressDialog.setMax(MAX_PROGRESS); progressDialog.show(); /* 模拟进度增加的过程 * 新开一个线程，每个100ms，进度增加1 */ new Thread(new Runnable() { @Override public void run() { int progress= 0; while (progress < MAX_PROGRESS){ try { Thread.sleep(100); progress++; progressDialog.setProgress(progress); } catch (InterruptedException e){ e.printStackTrace(); } } // 进度达到最大值后，窗口消失 progressDialog.cancel(); } }).start(); }
8.自定义
private void showCustomizeDialog() { /* @setView 装入自定义View ==> R.layout.dialog_customize * 由于dialog_customize.xml只放置了一个EditView，因此和图8一样 * dialog_customize.xml可自定义更复杂的View */ AlertDialog.Builder customizeDialog = new AlertDialog.Builder(this); final View dialogView = LayoutInflater.from(this) .inflate(R.layout.dialog_customize,null); customizeDialog.setTitle("我是一个自定义Dialog"); customizeDialog.setView(dialogView); customizeDialog.setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // 获取EditView中的输入内容 EditText edit_text = (EditText) dialogView.findViewById(R.id.edit_text); Toast.makeText(getApplicationContext(), edit_text.getText().toString(), Toast.LENGTH_SHORT).show(); } }); customizeDialog.show(); }
