不要去android的前一個屏幕？

Question

在我的應用程序中，我有兩個屏幕。 Screen1和Screen2。如果我在screen2時點擊後退按鈕，它將顯示screen1。我需要在點擊屏幕上的返回按鈕時關閉應用程序2。這個怎麼做？？？

Answer 1

也許你通過Intent從screen1開始screen2。

在您致電startActivity（screen2）後，您應該通過撥打finish()來關閉screen1。

喜歡的東西：

Intent screen2=new Intent(Screen1.this,Screen2.class); 
startActivity(screen2); 
finish(); 

Answer 2

從http://android-developers.blogspot.com/2009/12/back-and-other-hard-keys-three-stories.html：

@Override 
public boolean onKeyDown(int keyCode, KeyEvent event) { 
if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.ECLAIR 
     && keyCode == KeyEvent.KEYCODE_BACK 
     && event.getRepeatCount() == 0) { 
    // Take care of calling this method on earlier versions of 
    // the platform where it doesn't exist. 
    onBackPressed(); 
} 

return super.onKeyDown(keyCode, event); 
} 

@Override 
public void onBackPressed() { 
// This will be called either automatically for you on 2.0 
// or later, or by the code above on earlier versions of the 
// platform. 
return; 
}