Android 常用dialog提示对话框

在android应用程序中，经常需要用到dialog对话框让用户知道现在所在进行的操作(比如耗时的操作)，或者提示某些信息和状态等，算是比较常用的一个知识点；

1、简单对话框

    protected void dialog1(AlertDialog.Builder builder) {

        builder.setTitle("标题");

        builder.setPositiveButton("确定", null);

        builder.setIcon(R.drawable.ic_launcher);

        builder.setMessage("简单消息框");

        builder.show();

    }

2、带自定义内容对话框

    protected void study2(AlertDialog.Builder builder) {

        builder.setTitle("标题");

        builder.setView(new EditText(this));

        builder.setPositiveButton("确定", null);

        builder.setIcon(android.R.drawable.ic_dialog_info);

        builder.setMessage("简单消息框");

        builder.show();

    }

3、带单选按钮对话框

    protected void study3(AlertDialog.Builder builder) {

        builder.setTitle("请选择")

                .setIcon(android.R.drawable.ic_dialog_info)

                .setSingleChoiceItems(

                        new String[] { "item1", "item2", "item3", "item4" }, 0,

                        new DialogInterface.OnClickListener() {

                            public void onClick(DialogInterface dialog,

                                    int which) {

                                Log.e("选择", "" + which);

                                dialog.dismiss();

                            }

                        }).setNegativeButton("取消", null).show();

    }

在选择了某一项之后，onClick回调事件会把选择的项的索引返回给用户；

4、带多选组合框对话框

    protected void study4(AlertDialog.Builder builder) {

        builder.setTitle("请选择")

                .setIcon(android.R.drawable.ic_dialog_info)

                .setMultiChoiceItems(

                        new String[] { "item1", "item2", "item3", "item4" },

                        new boolean[] { true, true, false, true },

                        new OnMultiChoiceClickListener() {

                            @Override

                            public void onClick(DialogInterface dialog,

                                    int which, boolean isChecked) {

                                ListView lv = ((AlertDialog) dialog).getListView();

                                Log.e("项" + which, "选择" + lv.getCheckedItemPositions().get(which));

                            }

                        }).setNegativeButton("取消", null).show();

    }

在多选对话框中，选择了某一项并不会导致对话框隐藏，同样android也通过回调接口返回用户所选择的项；

5、进度条对话框

    public void study5() {

        ProgressDialog dialog = new ProgressDialog(MainActivity.this);

        dialog.setCancelable(true);

        dialog.setMessage("加载中...");

        // dialog.setTitle("进度条框窗口");

        // dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);

        // dialog.setMax(100);

        dialog.show();

    }

 

6、除了上述的添加用户界面友好提示的方法，还可以通过WindowManager添加一个View到界面上向用户反馈信息，此种方法也更灵活

    protected void study6() {

        ViewGroup vg = (ViewGroup) getLayoutInflater().inflate(R.layout.dia,null);

        pb = (ProgressBar) vg.findViewById(R.id.pb);

        vg.removeAllViews();

        WindowManager.LayoutParams lp = new WindowManager.LayoutParams(160,

                160, WindowManager.LayoutParams.TYPE_APPLICATION,

                WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,

                PixelFormat.TRANSLUCENT);

        WindowManager windowManager = (WindowManager)getSystemService(Context.WINDOW_SERVICE);

        windowManager.addView(pb, lp);

    }

重要的步骤即是从lp开始，设置LayoutParams参数，然后添加到窗口；