Question

尝试为Android制作简单的游戏应用程序，无法设置选项。

现在有一个非常基本的设置。

制作了一个全球课程，因为唯一一次真正改变的是选项菜单，唯一一次可以阅读的是游戏开始时。

Player.java

package com.example.gametest;

import android.app.Activity;

public class player extends Activity
{
    int pID;
    String PlayerName;

    public player()
    {

    }

    public void setpID( int ID){pID = ID;}
    public int getpID (int ID){return pID;}
    public void setPlayerName(String Name){PlayerName = Name;}
    public String getPlayerName (int ID){return PlayerName;}
}

MainActivity.java

public class MainActivity extends Activity {
player player1 = new player();
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    player1.pID = 1;
    player1.PlayerName = "NoName";
    setContentView(R.layout.activity_main);
    TextView textbox1 = (TextView) findViewById(R.id.textView1);
    textbox1.setText("Hello " + player1.PlayerName);
}
    public void optionsGame(View view) throws FileNotFoundException 
{
    // Do something in response to button
    Intent intent = new Intent(this, options.class);
    //EditText editText = (EditText) findViewById(R.id.editText1);
    //String message = editText.getText().toString();
    //intent.putExtra(EXTRA_MESSAGE, message);
    startActivity(intent);  
}
}

Options.java

import java.io.FileNotFoundException;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

public class options extends Activity{
    protected void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.optionpage);
        //Intent intent = getIntent();
    }

    public void backMain(View view) throws FileNotFoundException
    {
        super.onBackPressed();
    }

    public void saveOptions(View view) throws FileNotFoundException
    {
        TextView editText1 = (TextView) findViewById(R.id.editText1);
        Intent ActivityTwo = new Intent();

        Bundle bundle = new Bundle();

        bundle.putString("Player_Name", editText1.getText().toString());
        ActivityTwo.putExtras(bundle);
        setResult(RESULT_OK, ActivityTwo);
        finish();
    }
}

基本上，现在我只想拥有它，以便在options活动中，可以在那里设置名称。从我读过的内容应该很简单，但不能得到它。

我知道为什么它的错误，没有任何东西真的被设置为可以在Activity实例之间传递的值，但我不知道如何制作这样的值。

另外，如果你想要在我的xmls中使用android：onClick =“optionsGame”和android：onClick =“saveOptions”。

所以我看了这些，但仍然找不到一个简单的方法来做到这一点。

Sending data back to the Main Activity in android

how to pass values between activity

Answer 1

我明白了。 MainActivity.java

    public void optionsGame(View view) throws FileNotFoundException 
{
    // Do something in response to button
    Intent intent = new Intent(this, options.class);
    Intent i = new Intent(this, options.class);
    startActivityForResult(i, 1);
    String message = player1.PlayerName;
    intent.putExtra(EXTRA_MESSAGE, message);  
}

并且在 Options.java

    public void saveOptions(View view) throws FileNotFoundException
{
    TextView editText1 = (TextView) findViewById(R.id.editText1);
    Intent returnIntent = new Intent();
     returnIntent.putExtra("result" , editText1.getText().toString());
     setResult(RESULT_OK,returnIntent);     
     finish();
}

然后重新开始，创建一个新功能。 MainActivity.java

    protected void onActivityResult(int requestCode, int resultCode, Intent data) 
{

      if (requestCode == 1) 
      {

         if(resultCode == RESULT_OK)
         {      
             String result=data.getStringExtra("result");  
             player1.PlayerName = result;
             TextView textbox1 = (TextView) findViewById(R.id.textView1);
             textbox1.setText("Hello " + player1.PlayerName);
         }
         if (resultCode == RESULT_CANCELED) 
         {    
             //Write your code if there's no result
         }
      }
    }//onActivityResult

Java android，如何在Activities之间传递值。主菜单，选项菜单

1 个答案: