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8种android 对话框(Dialog)使用方法详解

程序员文章站 2024-02-26 23:15:46
本文汇总了android 8种对话框(dialog)使用方法,分享给大家供大家参考,具体内容如下 1.写在前面 android提供了丰富的dialog函数,本文介绍最常...

本文汇总了android 8种对话框(dialog)使用方法,分享给大家供大家参考,具体内容如下

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与图2)

2个按钮

public class mainactivity extends activity {
 
  @override
  protected 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() {
      @override
      public 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() {
      @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();
  }
}

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() {
    @override
    public void onclick(dialoginterface dialog, int which) {
      // ...to-do
    }
  });
  normaldialog.setneutralbutton("按钮2", 
    new dialoginterface.onclicklistener() {
    @override
    public void onclick(dialoginterface dialog, int which) {
      // ...to-do
    }
  });
  normaldialog.setnegativebutton("按钮3", new dialoginterface.onclicklistener() {
    @override
    public 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() {
    @override
    public void onclick(dialoginterface dialog, int which) {
      // which 下标从0开始
      // ...to-do
      toast.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(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() {
    @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(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() {
    @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();
}

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() {
    @override
    public 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">
  <edittext
    android: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() {
    @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(mainactivity.this,
        edit_text.gettext().tostring(),
        toast.length_short).show();
    }
  });
  customizedialog.show();
}

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){
     
    @override
    public alertdialog create() {
      items[0] = "我是no.1";
      return super.create();
    }
 
    @override
    public 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() {
    @override
    public 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();
}

以上就是本文的全部内容,希望对大家的学习有所帮助。