8种android 对话框(Dialog)使用方法详解

2019-12-10 18:51:14王振洲

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();
}