Question

我正在使用supportRequestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS)并显示或隐藏ProgressBar，我正在使用setSupportProgressBarIndeterminateVisibility()。
动机是，一旦验证了电子邮件地址就会被发送到服务器，同时等待来自服务器的响应并显示ProgressBar。获得响应后，ProgressBar将被隐藏。
我的代码应该有效。请看下面。

public class LoginActivity extends ActionBarActivity {

String response = "";
String emailAddress, Password;
EditText email, password;
Button sign_in;
TextView register, forgotPassword;

@Override
protected void onCreate(Bundle savedInstanceState) {
    supportRequestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_login);
    sign_in = (Button) findViewById(R.id.sign_in);
    register = (TextView) findViewById(R.id.register);
    forgotPassword = (TextView) findViewById(R.id.forgotPassword);


    register.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Intent intent = new Intent(LoginActivity.this, RegisterActivity.class);
            startActivity(intent);
        }
    });

    sign_in.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            email = (EditText) findViewById(R.id.email);
            password = (EditText) findViewById(R.id.password);
            emailAddress = email.getText().toString();
            Password = password.getText().toString();

            if (!emailAddress.equals("") && !Password.equals("")){
                setSupportProgressBarIndeterminateVisibility(true);
                    try {
                        response = new Connection().execute().get().toString();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    } catch (ExecutionException e) {
                        e.printStackTrace();
                    }

                if (response.equals("Credentials Validated!")) {
                    setSupportProgressBarIndeterminateVisibility(false);
                    Toast.makeText(LoginActivity.this, response, Toast.LENGTH_SHORT).show();
                    Intent intent = new Intent(LoginActivity.this, Home.class);
                    intent.putExtra("emailAddress", emailAddress);
                    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
                    finish();
                    startActivity(intent);
                } else {
                    setSupportProgressBarIndeterminateVisibility(false);
                    final AlertDialog alertDialog = new AlertDialog.Builder(
                            LoginActivity.this).create();

                    // Setting Dialog Title
                    alertDialog.setTitle("We need your attention!");

                    // Setting Dialog Message
                    alertDialog.setMessage(response);

                    // Setting Icon to Dialog
                    alertDialog.setIcon(R.drawable.ic_launcher);

                    // Setting OK Button
                    alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int which) {
                            // Write your code here to execute after dialog closed
                            alertDialog.cancel();
                        }
                    });

                    // Showing Alert Message
                    alertDialog.show();
                }
            }
            else {
                if(emailAddress.equals("")) {
                    email.setError("Email Address Cannot Be Empty!");
                }
                else
                    if(Password.equals("")){
                        password.setError("Password Cannot Be Empty!");
                    }
            }
        }
    });


}


private class Connection extends AsyncTask {
    @Override
    protected String doInBackground(Object[] objects) {
        LoginJSONParser loginJsonParser = new LoginJSONParser();
        return loginJsonParser.getJson(emailAddress, Password);
    }
}

}

Answer 1

替换：

<Capabilities>
<Capability Name="internetClient" />
<DeviceCapability Name="proximity" />
<DeviceCapability Name="bluetooth.rfcomm">
  <Device Id="any">
    <Function Type="serviceId:A502CA9A-2BA5-413C-A4E0-13804E47B38F" />
    <Function Type="serviceId:C742E1A2-6320-5ABC-9643-D206C677E580" />
  </Device>
</DeviceCapability>

而不是

   setSupportProgressBarIndeterminateVisibility(true);

因为您扩展了ActionBarActivity。（因为您使用的是supportRequestWindowFeature而不是requestWindowFeature）

Android - setSupportProgressBarIndeterminateVisibility（true）不起作用

1 个答案: