共享preferences code无功能，使按钮可见 [英] The SharedPreferences code was no function to make button Visible

问题描述

我第一次做了没有$ P $编码pferences的按钮就可以看到，但是当我把preferences code中的按钮不可见。

First time i had done coding without preferences the button can visible but when i put preferences code the button not visible

我有3类是menu.class，levelone.class，leveltwo.class

i have 3 class it is menu.class, levelone.class, leveltwo.class

这是 menu.class 以下code这样的

this is the following code of menu.class like this

public class menu extends Activity {

Button f1, f2;
ImageView f2lock;
boolean levelTwoUnlocked;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    this.requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
    WindowManager.LayoutParams.FLAG_FULLSCREEN);
    setContentView(R.layout.famouslevel);

    f1 =(Button)findViewById(R.id.f1);      
    f1.setOnClickListener(new View.OnClickListener() {

      @Override
      public void onClick(View v){
           // TODO Auto-generated method stub
        Intent level1 = new Intent ();
        level1.setClassName ("com.example.game", "com.example.game.levelone");
        startActivityForResult (level1, 0);              
            }             
      });       
}                 
    public void onActivityResult (int requestCode, int resultCode, Intent level1) {
        super.onActivityResult (requestCode, resultCode, level1); 

        f2=(Button)findViewById(R.id.f2);      
        f2lock=(ImageView)findViewById(R.id.f2lock);

        switch (resultCode) {
        case 2:   SharedPreferences preferences = getSharedPreferences("preferences", MODE_PRIVATE);        
                   SharedPreferences.Editor editor = preferences.edit();
                   editor.putBoolean("f2", levelTwoUnlocked);
                   editor.commit();

    if(levelTwoUnlocked){
        f2.setVisibility(View.VISIBLE);
        f2lock.setVisibility(View.GONE);            
        }
        else {
        f2.setVisibility(View.GONE);
        f2lock.setVisibility(View.VISIBLE);
        }      
      }
    f2.setOnClickListener(new View.OnClickListener() {

         @Override
         public void onClick(View v){
           // TODO Auto-generated method stub
            Intent level2 = new Intent ();
            level2.setClassName ("com.example.game", "com.example.game.leveltwo");
            startActivityForResult (level2, 0);              
            }             
      });       
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.splashscreen, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}

}

和 levelone.class 我已经把这个code

and in levelone.class i have put this code

 public void onClick(View v){
                  setResult (2);
                  finish();          
                  }
                }); 

这就是code是使按钮可见 menu.class 但是当 levelone.class 完成（ ）;在没有发生与按钮，它仍然GONE

thats code is to make button visible in menu.class but when levelone.class finish(); is nothing happen with the button, it's still GONE

F2按键的功能是打开 leveltwo.class 和 leveltwo.class 有相同的code到设置F3按钮可见

f2 button function is to open leveltwo.class and in leveltwo.class had same code to set f3 button visible

public void onClick(View v){
                      setResult (3);
                      finish();          
                      }
                    }); 

等都与下一级有一个相同的code键使按键可见
难道我的code的setResult是错误或preferences code，使其无法正常工作？

and so on with the next level had a same code to make button visible Did my code setResult is wrong or the preferences code make it not function?

推荐答案

一个布尔值分配给 leveTwoUnloacked
 要么
做出改变。

Assign a boolean value to leveTwoUnloacked or make changes in

editor.putBoolean（F2，真正的）;

和检查

if(prefernces.getBoolean("f2",false))
{
//your code
}

这篇关于共享preferences code无功能，使按钮可见的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！