我终于想出了哪里可以找到大部分内容。
但现在我需要知道如何测试该程序的一部分用户名。
我的目标是，如果用户没有在程序中放置任何内容，则不允许任何内容继续。
这是一款很棒的应用。我有3个布局文件和3个java文件。 如果您需要我发送文件，任何帮助都会很好。
package edu.jones.demogamestartarrayadaptor;
import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
//import android.view.KeyEvent;
import android.view.View;
//import android.view.View.OnKeyListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
//import android.widget.Toast;
public class GameControlMainActivity extends ListActivity
{
//Class-wide variables for data passed/returned
private String userName = "";
//Use an int for gameLevel,naturally...but, this requires
//use of various methods to convert to String and back!
private int gameLevel = 1;
private EditText nameEntryET;
private TextView gameLevelAnnouncerTV;
private TextView gameLevelTV;
Button doneButton;
//This TV prompts user to enter name in the EditText
//Then, it is made invisible
private TextView namePromptTV;
//These two start out invisible and then show the name
private TextView nameSetTV;
private TextView nameEntTV;
//Array of choices for user
static final String[] CHOICES = new String[]
{
"Read directions",
"Play Game",
"Quit"
};
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//Set up View ids
nameEntryET = (EditText)findViewById(R.id.enter_nameET);
gameLevelAnnouncerTV = (TextView) findViewById(R.id.game_level_announcer_TV);
gameLevelTV = (TextView) findViewById(R.id.game_level_TV);
//Set the game level in the TextView
gameLevelTV.setText(Integer.toString(gameLevel));
namePromptTV = (TextView)findViewById(R.id.name_prompt_tv);
nameSetTV = (TextView)findViewById(R.id.name_set_tv);
nameEntTV = (TextView)findViewById(R.id.name_entered_tv);
//Set Done button listener to get user's name
doneButton = (Button) findViewById(R.id.doneBtn);
setDoneButtonListener();
//Set up ArrayAdaptor for the options
setListAdapter(new ArrayAdapter<String>
(this, android.R.layout.simple_list_item_1, CHOICES));
getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
getListView().setTextFilterEnabled(true);
//Set up the listener for user clicks on the list
setListClickListener();
//this toast is for when it opens
Toast.makeText(this, "yo whats up", Toast.LENGTH_SHORT).show();
}//END onCreate
private void setDoneButtonListener()
{
doneButton.setOnClickListener
(
new View.OnClickListener()
{
@Override
public void onClick(View v)
{
//Get user's name when button is clicked
//Call method to set text and hide button
setUserNameAndHideButton();
}
}
);//END setOnClickListener
}//END setDoneButtonListener
//Sets up username in its TextView, and game level Views,
//then hides the other Views & button
private void setUserNameAndHideButton()
{
userName = nameEntryET.getText().toString();
doneButton.setVisibility(View.GONE);
Toast.makeText(this, "Your name has been entered", Toast.LENGTH_SHORT).show();
//After getting the input, hide the EditText
//VISIBLE(0), INVISIBLE(4) or GONE(8)
nameEntryET.setVisibility(View.INVISIBLE);
namePromptTV.setVisibility(View.GONE);
nameEntTV.setText(userName);
nameSetTV.setVisibility(View.VISIBLE);
nameEntTV.setVisibility(View.VISIBLE);
gameLevelAnnouncerTV.setVisibility(View.VISIBLE);
gameLevelTV.setVisibility(View.VISIBLE);
}//END setUserNameAndHideButton
//Set up the listener for the ListView to interpret user clicks
private void setListClickListener()
{
//Set up the click listener for the options
getListView().setOnItemClickListener
(
new OnItemClickListener()
{
//@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3)
{
switch(arg2)
{
case 0: launchDirectionsPage();
break;
case 1: startGame();
break;
case 2: finish();
break;
default: break;
}
}
}//END OnItemClickListener
);//END setOnItemClickListener
}//END setListClickListener
//Launch a simple activity to show a scroll view of directions
protected void launchDirectionsPage()
{
//Set up Intent
Intent launchDirections = new Intent(this, DirectionsPageActivity.class);
startActivity(launchDirections);
}//END launchDirectionsPage
//Launch the activity that allows user to input new game value
//Upon return the onActivityResult method is called
protected void startGame()
{
//Set up Intent to launch other activity: PlayGame
Intent launchGame = new Intent(this, PlayGameActivity.class);
//Info added to the Intent's Bundle to pass to PlayGameActivity
launchGame.putExtra("bdl_username", userName);
launchGame.putExtra("bdl_gamelevel", gameLevel);
startActivityForResult(launchGame, 0);
}//END startGame
//This method will be called when the startGame activity terminates
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
if (requestCode == 0 && resultCode == RESULT_OK)
{
//Reset the views to possibly updated info returned in the Intent
//First, access the Bundle's values
userName = data.getExtras().getString("bdl_returnUserName");
gameLevel = data.getExtras().getInt("bdl_returnGameLevel");
//Update the user name & game level with values from other activity
nameEntTV.setText(userName);
gameLevelTV.setText(Integer.toString(gameLevel));
}
}//END onActivityResult
@Override
protected void onSaveInstanceState (Bundle outState)
{
super.onSaveInstanceState(outState);
//Add the username and game level to the Bundle
outState.putString("bdl_savedusername", userName);
outState.putInt("bdl_savedgamelevel", gameLevel);
}//END onSaveInstanceState
@Override
public void onRestoreInstanceState (Bundle savedInstanceState)
{
super.onRestoreInstanceState(savedInstanceState);
//Restore the username and game level from the Bundle
userName = savedInstanceState.getString("bdl_savedusername");
gameLevel = savedInstanceState.getInt("bdl_savedgamelevel");
}//END onRestoreInstanceState
}//END GameControlMainActivity
答案 0 :(得分：1)
如果您要求停止未输入用户名，请执行以下操作：
private void setDoneButtonListener()
{
doneButton.setOnClickListener
(
new View.OnClickListener()
{
@Override
public void onClick(View v)
{
if (nameEntryET.getText().toString().equals("")) {
Toast.makeText(this, "Enter a username", Toast.LENGTH_LONG).show();
} else {
//Get user's name when button is clicked
//Call method to set text and hide button
setUserNameAndHideButton();
}
}
}
);//END setOnClickListener
}//END setDoneButtonListener
如果nameEntryET没有输入值，nameEntryET.getText().toString()将返回一个空字符串。