Android：ProgressDialog 然后吐司 [重复]

Question

可能重复：
Android: ProgressDialog.show() crashes with getApplicationContext

我想先显示一个进度对话框，然后是 toast。我希望加载进度对话框，只要用户选择的时间延迟（如 15、30、60 秒）并且没有延迟，然后吐司指示消息已发送。我该如何实施？我在哪里以及如何在我的代码上执行此操作？

这是我的代码：

btnSend.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                String phoneNo = editTextRecipient.getText().toString();
                String message = editTextNewMessage.getText().toString(); 
                boolean split = false;

                final Toast toast = Toast.makeText(getBaseContext(), 
                         "Your message " + "\"" + message + "\"" + " is sent to " +"\""+ phoneNo+"\"", 
                          Toast.LENGTH_SHORT);

                Runnable showToastRunnable = new Runnable() {
                  public void run() {
                      toast.show();
        // Send button Listener

                  }
              };

                if (phoneNo.length()>0 && message.length()>0)  {
                    if (count == 0) {
                          handler.postDelayed(showToastRunnable, 0);
                      }
                      else if (count == 1) {
                          handler.postDelayed(showToastRunnable, 15000);
                      }
                      else if (count == 2) {
                          handler.postDelayed(showToastRunnable, 30000);
                      }
                      else if (count == 3) {
                          handler.postDelayed(showToastRunnable, 60000);
                      }
                }
                   // sendSMS(phoneNo, message, split); */
                else
                    Toast.makeText(getBaseContext(), 
                        "Please enter both phone number and message.", 
                        Toast.LENGTH_SHORT).show();
            }
        });        
    }

Answer 1

您可以使用以下代码显示进度对话框

private ProgressDialog dialog;
public  void showProgress () {
    dialogSet = true;
    // prepare the dialog box
    //ProgressDialog 
    dialog = new ProgressDialog(this);
    // make the progress bar cancelable
    dialog.setCancelable(true);
    // set a message text
    dialog.setMessage("Please wait..");
    // show it
    dialog.show();

}

要取消对话框，您应该使用dialog.cancel()。取消对话框后，可以显示Toast

像这样更改你的代码

Runnable showToastRunnable = new Runnable() {
              public void run() {
                  dialog.cancel();
                  toast.show();
              // Send button Listener
              }
             };
            if (phoneNo.length()>0 && message.length()>0)  {                                    
                showProgress ();    
                if (count == 0) {
                      handler.postDelayed(showToastRunnable, 0);

                  }
                  else if (count == 1) {
                      handler.postDelayed(showToastRunnable, 3000);

                  }
                  else if (count == 2) {
                      handler.postDelayed(showToastRunnable, 30000);
                  }
                  else if (count == 3) {
                      handler.postDelayed(showToastRunnable, 60000);
                  }
            }
               // sendSMS(phoneNo, message, split); */
            else
                Toast.makeText(getBaseContext(), 
                    "Please enter both phone number and message.", 
                    Toast.LENGTH_SHORT).show();
        }