Android下常见的四种对话框

摘要：在实际开发过程有时为了能够和用户进行很好的交互，需要使用到对话框，在Android中常用的对话框有四种：普通对话框、单选对话框、多选对话框、进度对话框。

一、普度对话框

  public void click(View view)
    {
        //this代表MainActivity是子类    getApplicationContext代表context是父类
        //对话框不能用getApplicationContext
        AlertDialog.Builder builder = new AlertDialog.Builder(this);//getApplicationContext());
        builder.setTitle("警告");
        builder.setMessage("世界上最遥远的距离是没有网络");
        builder.setPositiveButton("确定", new DialogInterface.OnClickListener()
        {
            @Override
            public void onClick(DialogInterface dialogInterface, int i)
            {
                Toast.makeText(mContext, "点击了确定了按钮", Toast.LENGTH_SHORT).show();
            }
        });
        builder.setNegativeButton("确定", new DialogInterface.OnClickListener()
        {
            @Override
            public void onClick(DialogInterface dialogInterface, int i)
            {
                Toast.makeText(mContext, "点击了取消了按钮", Toast.LENGTH_SHORT).show();
            }
        });
        builder.show();
    }

二、单选对话框

   public void click(View view)
    {
        final AlertDialog.Builder builder = new AlertDialog.Builder(this);//getApplicationContext());
        builder.setTitle("请选择你喜欢的课");
        final String item[] = {"android", "java", "c", "c++"};
        builder.setSingleChoiceItems(item, -1, new DialogInterface.OnClickListener()
        {
            @Override
            public void onClick(DialogInterface dialogInterface, int i)
            {
                String s = item[i];
                Toast.makeText(mContext, s, Toast.LENGTH_SHORT).show();
                dialogInterface.dismiss();
            }
        });
        builder.show();
    }

三、多选对话框

 public void click(View view)
    {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);//getApplicationContext());
        builder.setTitle("请选出你喜欢的水果");
        final String[] item = {"苹果", "榴莲", "荔枝", "黄瓜", "香蕉"};
        final boolean[] checkChoisce = {true, false, false, false, true};
        builder.setMultiChoiceItems(item, checkChoisce, new DialogInterface.OnMultiChoiceClickListener()
        {
            @Override
            public void onClick(DialogInterface dialogInterface, int i, boolean b)
            {
            }
        });
        builder.setPositiveButton("确定", new DialogInterface.OnClickListener()
        {
            @Override
            public void onClick(DialogInterface dialogInterface, int i)
            {
                Toast.makeText(mContext, "点击了确定了按钮", Toast.LENGTH_SHORT).show();
                StringBuffer sb = new StringBuffer();
                for (int j = 0; j < item.length; j ++)
                {
                    if (checkChoisce[j])
                    {
                        String s = item[j];
                        sb.append(s);
                    }
                }
                Toast.makeText(mContext, sb.toString(), Toast.LENGTH_SHORT).show();
                dialogInterface.dismiss();
            }
        });
        builder.setNegativeButton("取消", new DialogInterface.OnClickListener()
        {
            @Override
            public void onClick(DialogInterface dialogInterface, int i)
            {
                Toast.makeText(mContext, "点击了取消了按钮", Toast.LENGTH_SHORT).show();
            }
        });
        builder.show();
    }

四、进度对话框

   public void click(View view)
    {
        //与进度相关的UI都可以在子线程更新UI
        final ProgressDialog dialog = new ProgressDialog(this);
        dialog.setTitle("玩命加载中");
        dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
        dialog.show();
        new Thread(){public void run(){
            for (int i = 0; i < 100; i ++)
            {
                SystemClock.sleep(50);
                dialog.setProgress(i);
            }
            dialog.dismiss();
        }}.start();
    }