安卓;对观点感到困惑？
我创建了一个类（InputControl），它扩展了我的主类（Main）的视图，并占据了屏幕的焦点。我在主 xml 布局上有一个按钮，它调用 control() 并设置我的 InputControl 视图，从那里我捕获用户输入。
如何从 InputControl 视图类返回到 xml 布局？
public class Main extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
InputControl = new InputControl(this);
}
//......SNIP!
public void control(){
setContentView(InputControl);
InputControl.requestFocus();
}
}
public class InputControl extends View implements OnTouchListener {
public InputControl(Context context) {
super(context);
setFocusable(true);
setFocusableInTouchMode(true);
this.setOnTouchListener(this);
}
public boolean onTouch(View view, MotionEvent event) {
//...I AM CAPTURING USER TOUCH EVENTS HERE
}
}
I have created a class (InputControl) which extends the view of my main class (Main), and takes focus of the screen. I have a button on the main xml layout which calls control() and sets up my InputControl view, from there I capture user input.
How can I return back to the xml layout from the InputControl view class?
public class Main extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
InputControl = new InputControl(this);
}
//......SNIP!
public void control(){
setContentView(InputControl);
InputControl.requestFocus();
}
}
public class InputControl extends View implements OnTouchListener {
public InputControl(Context context) {
super(context);
setFocusable(true);
setFocusableInTouchMode(true);
this.setOnTouchListener(this);
}
public boolean onTouch(View view, MotionEvent event) {
//...I AM CAPTURING USER TOUCH EVENTS HERE
}
}
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除非您有特定的原因这样做，否则更好的方法可能是让第二个活动（例如 InputControlActivity）拥有自己的布局文件，并将您的 InputControl 类嵌入其中。
然后，您将启动第二个活动的实例（使用 startActivity()） - 一旦您完成了 InputControlActivity，只需按手机的“后退”按钮即可关闭该活动并返回到主活动。
Unless you have have a specific reason for doing things this way, a better way might be to have a second activity (InputControlActivity for example) with its own layout file and embed your InputControl class into that.
You would then start an instance of the second activity (with startActivity()) - once you're finished in the InputControlActivity, simply pressing the phone's BACK button will close that activity and return to the main one.