1.写在前面

    Android提供了丰富的Dialog函数，本文介绍最常用的8种对话框的使用方法，包括普通（包含提示消息和按钮）、列表、单选、多选、等待、进度条、编辑、自定义等多种形式，将在第2部分介绍。
    有时，我们希望在对话框创建或关闭时完成一些特定的功能，这需要复写Dialog的create()、show()、dismiss()等方法，将在第3部分介绍。

2.代码示例

2.1 普通Dialog(图1和图2)

2个按钮

public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);Button buttonNormal = (Button) findViewById(R.id.button_normal);buttonNormal.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {showNormalDialog();}});}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(MainActivity.this);normalDialog.setIcon(R.drawable.icon_dialog);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() {@Overridepublic void onClick(DialogInterface dialog, int which) {//...To-do }});normalDialog.setNegativeButton("关闭", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {//...To-do }});// 显示 normalDialog.show();} }

3个按钮

/* @setNeutralButton 设置中间的按钮* 若只需一个按钮，仅设置 setPositiveButton 即可*/ private void showMultiBtnDialog(){AlertDialog.Builder normalDialog = new AlertDialog.Builder(MainActivity.this);normalDialog.setIcon(R.drawable.icon_dialog);normalDialog.setTitle("我是一个普通Dialog").setMessage("你要点击哪一个按钮呢?");normalDialog.setPositiveButton("按钮1", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// ...To-do }});normalDialog.setNeutralButton("按钮2", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// ...To-do }});normalDialog.setNegativeButton("按钮3", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// ...To-do }});// 创建实例并显示 normalDialog.show(); }

2.2 列表Dialog(图3)

private void showListDialog() {final String[] items = { "我是1","我是2","我是3","我是4" };AlertDialog.Builder listDialog = new AlertDialog.Builder(MainActivity.this);listDialog.setTitle("我是一个列表Dialog");listDialog.setItems(items, new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// which 下标从0开始// ...To-doToast.makeText(MainActivity.this, "你点击了" + items[which], Toast.LENGTH_SHORT).show();}});listDialog.show(); }

2.3 单选Dialog(图4)

int yourChoice; 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(MainActivity.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0singleChoiceDialog.setSingleChoiceItems(items, 0, new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {yourChoice = which;}});singleChoiceDialog.setPositiveButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {if (yourChoice != -1) {Toast.makeText(MainActivity.this, "你选择了" + items[yourChoice], Toast.LENGTH_SHORT).show();}}});singleChoiceDialog.show(); }

2.4 多选Dialog(图5)

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(MainActivity.this);multiChoiceDialog.setTitle("我是一个多选Dialog");multiChoiceDialog.setMultiChoiceItems(items, initChoiceSets,new DialogInterface.OnMultiChoiceClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which,boolean isChecked) {if (isChecked) {yourChoices.add(which);} else {yourChoices.remove(which);}}});multiChoiceDialog.setPositiveButton("确定", new DialogInterface.OnClickListener() {@Overridepublic 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(MainActivity.this, "你选中了" + str, Toast.LENGTH_SHORT).show();}});multiChoiceDialog.show(); }

2.5 等待Dialog(图6)

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(MainActivity.this);waitingDialog.setTitle("我是一个等待Dialog");waitingDialog.setMessage("等待中...");waitingDialog.setIndeterminate(true);waitingDialog.setCancelable(false);waitingDialog.show(); }

2.6 进度条Dialog(图7)

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(MainActivity.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() {@Overridepublic 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(); }

2.7 编辑Dialog(图8)

private void showInputDialog() {/*@setView 装入一个EditView*/final EditText editText = new EditText(MainActivity.this);AlertDialog.Builder inputDialog = new AlertDialog.Builder(MainActivity.this);inputDialog.setTitle("我是一个输入Dialog").setView(editText);inputDialog.setPositiveButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {Toast.makeText(MainActivity.this,editText.getText().toString(), Toast.LENGTH_SHORT).show();}}).show(); }

2.8 自定义Dialog(图9)

<!-- res/layout/dialog_customize.xml--> <!-- 自定义View --> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical"android:layout_width="match_parent"android:layout_height="match_parent"><EditTextandroid:id="@+id/edit_text"android:layout_width="match_parent"android:layout_height="wrap_content" /> </LinearLayout>

 

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(MainActivity.this);final View dialogView = LayoutInflater.from(MainActivity.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() {@Overridepublic 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(MainActivity.this,edit_text.getText().toString(),Toast.LENGTH_SHORT).show();}});customizeDialog.show(); }

我们经常需要进行自定义Dialog，使用上面的AlertDialog.Builder类在处理背景的时候，灵活性不强。笔者推荐使用Dialog类进行窗口定义：

Dialog dialog = new Dialog(getActivity()); dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);//无标题 View dialogView = LayoutInflater.from(MainActivity.this).inflate(R.layout.dialog_customize,null); dialog.setContentView(dialogView); dialog.getWindow().setBackgroundDrawableResource(android.R.color.transparent);//设置背景透明 mDialog.show();

上面使用了setBackgroundDrawableResource设置透明背景，如果是通过AlertDialog.Builder实例的getWindow().setBackgroundDrawableResource()设置的话是没有效果的。

3 复写回调函数

/* 复写Builder的create和show函数，可以在Dialog显示前实现必要设置* 例如初始化列表、默认选项等* @create 第一次创建时调用* @show 每次显示时调用*/ private void showListDialog() {final String[] items = { "我是1","我是2","我是3","我是4" };AlertDialog.Builder listDialog = new AlertDialog.Builder(MainActivity.this){@Overridepublic AlertDialog create() {items[0] = "我是No.1";return super.create();}@Overridepublic AlertDialog show() {items[1] = "我是No.2";return super.show();}};listDialog.setTitle("我是一个列表Dialog");listDialog.setItems(items, new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// ...To-do }});/* @setOnDismissListener Dialog销毁时调用* @setOnCancelListener Dialog关闭时调用*/listDialog.setOnDismissListener(new DialogInterface.OnDismissListener() {public void onDismiss(DialogInterface dialog) {Toast.makeText(getApplicationContext(),"Dialog被销毁了", Toast.LENGTH_SHORT).show();}});listDialog.show(); }

 4 方法介绍

dismiss()

　　AlertDialog.Builder对话框没有类似finish()或者dismiss()这样的关闭窗口方法,，但是他的父类具有这样的方法。可以通过他的父类，关闭对话框

AlertDialog.Builder builder = new AlertDialog.Builder(this); AlertDialog dialog = builder.show(); dialog.dismiss();

 

 

原文连接：Android的8种对话框

 

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