android-基础编程-Dialog

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();
    }