android - OnKeyListener 不工作

Question

我正在尝试在关键事件上实现动画。相同的代码在 OnClickListener 上运行良好，但在 OnKeyListener 上没有任何反应。甚至在 Logcat 上也没有错误消息。

请帮我解决这个问题。下面是我的代码。请告诉我哪里错了。

package com.example.SliderImage;

import android.app.Activity;

import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnKeyListener;
import android.view.animation.AccelerateInterpolator;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.Button;
import android.widget.ViewFlipper;

public class SliderImage extends Activity {
    ViewFlipper flipper;
    String value;
    int i;

     int menuArray[] = {R.id.gtmain, R.id.gtmini, R.id.gtmore};

     protected void showPrevious() {
            // TODO Auto-generated method stub

        }
        protected void setInAnimation(Animation inFromRightAnimation) {
            // TODO Auto-generated method stub

        }
        protected void setOutAnimation(Animation outToLeftAnimation) {
            // TODO Auto-generated method stub

        }
        protected void showNext() {
            // TODO Auto-generated method stub

        }
        private Animation inFromRightAnimation() {

            Animation inFromRight = new TranslateAnimation(
            Animation.RELATIVE_TO_PARENT,  +1.0f, Animation.RELATIVE_TO_PARENT,  0.0f,
            Animation.RELATIVE_TO_PARENT,  0.0f, Animation.RELATIVE_TO_PARENT,   0.0f
            );
            inFromRight.setDuration(500);
            inFromRight.setInterpolator(new AccelerateInterpolator());
            return inFromRight;
            }
        private Animation outToLeftAnimation() {

            Animation outtoLeft = new TranslateAnimation(
              Animation.RELATIVE_TO_PARENT,  0.0f, Animation.RELATIVE_TO_PARENT,  -1.0f,
              Animation.RELATIVE_TO_PARENT,  0.0f, Animation.RELATIVE_TO_PARENT,   0.0f
            );
            outtoLeft.setDuration(500);
            outtoLeft.setInterpolator(new AccelerateInterpolator());
            return outtoLeft;
            }



        private Animation inFromLeftAnimation() {

            Animation inFromLeft = new TranslateAnimation(
            Animation.RELATIVE_TO_PARENT,  -1.0f, Animation.RELATIVE_TO_PARENT,  0.0f,
            Animation.RELATIVE_TO_PARENT,  0.0f, Animation.RELATIVE_TO_PARENT,   0.0f
            );
            inFromLeft.setDuration(500);
            inFromLeft.setInterpolator(new AccelerateInterpolator());
            return inFromLeft;
            }
        private Animation outToRightAnimation() {

            Animation outtoRight = new TranslateAnimation(
              Animation.RELATIVE_TO_PARENT,  0.0f, Animation.RELATIVE_TO_PARENT,  +1.0f,
              Animation.RELATIVE_TO_PARENT,  0.0f, Animation.RELATIVE_TO_PARENT,   0.0f
            );
            outtoRight.setDuration(500);
            outtoRight.setInterpolator(new AccelerateInterpolator());
            return outtoRight;
            }
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     setContentView(R.layout.home);

     flipper = (ViewFlipper) findViewById(R.id.flipper);

     final  Button miniButton = (Button) findViewById(R.id.gtmini);
     final Button mainButton = (Button) findViewById(R.id.gtmain);
     final Button moreButton = (Button) findViewById(R.id.gtmore);

     miniButton.setOnClickListener(new View.OnClickListener() {
         public void onClick(View view) {
             flipper.setInAnimation(inFromRightAnimation());
             flipper.setOutAnimation(outToLeftAnimation());
             flipper.showNext();      
         }
     });

     mainButton.setOnClickListener(new View.OnClickListener() {
         public void onClick(View view) {
             flipper.setInAnimation(inFromLeftAnimation());
             flipper.setOutAnimation(outToRightAnimation());
             //flipper.showPrevious();
             flipper.showNext(); 
         }
     });
     moreButton.setOnClickListener(new View.OnClickListener() {
         public void onClick(View view) {
             flipper.setInAnimation(inFromLeftAnimation());
             flipper.setOutAnimation(outToRightAnimation());
            // flipper.showPrevious();
             flipper.showNext();
         }
     });

     mainButton.setOnKeyListener(new OnKeyListener() {

        public boolean onKey(View v, int keyCode, KeyEvent event) {
            // TODO Auto-generated method stub
            String a1=String.valueOf(keyCode);
            Log.i("listvalaaaaaaaaaa",a1);
            if (keyCode==66) {
                //String value=mainButton.getText().toString();
                if(value.equalsIgnoreCase("GO TO MAIN"))
                {
                    //startActivity(new Intent(Start.this,MainEpg.class));
                }
                if(value.equalsIgnoreCase("GO TO MINI"))
                {
                    //startActivity(new Intent(Start.this,MiniEpg.class));
                }
            }

             if (keyCode==22) {

                 Log.i("insideright","ghkhkjhk");
                 flipper.setInAnimation(inFromRightAnimation());
                 flipper.setOutAnimation(outToLeftAnimation());
                 flipper.showNext();      

             }
                 int c = moreButton.getId();
                 int b = mainButton.getId();
                 int a = moreButton.getId();

                 menuArray[0] = b;
                 menuArray[1] = c;
                 menuArray[2] = a;

                 moreButton.setId(menuArray[i]);
                 miniButton.setId(menuArray[++i]);
                 mainButton.setId(menuArray[++i]);

                 mainButton.requestFocus();
                 i = 0;
                //mainButton.requestFocus();
                 mainButton.setSelected(true);
                 flipper.setInAnimation(inFromRightAnimation());
                 flipper.setOutAnimation(outToLeftAnimation());
                 flipper.showNext();      

             if (keyCode==21) {

                 int a11 = moreButton.getId();
                 int b1 = mainButton.getId();
                 int c1 = moreButton.getId();

                 menuArray[0] = c1;
                 menuArray[1] = b1;
                 menuArray[2] = a11;

                 moreButton.setId(menuArray[i]);
                 miniButton.setId(menuArray[++i]);
                 mainButton.setId(menuArray[++i]);

                 mainButton.requestFocus();
                 i = 0;

                //mainButton.requestFocus();
                 mainButton.setSelected(true);
                /* flipper.setInAnimation(inFromRightAnimation());
                 flipper.setOutAnimation(outToLeftAnimation());
                 flipper.showPrevious();*/
             }
            return true;
            }
        });


    }



}

Answer 1

KeyCodes 取决于您使用的键盘。这意味着对于同一个键，您可能会从不同的键盘获得不同的 KeyCode。请记住，来自 documentation ,

View.OnKeyListener is only useful for hardware keyboards; a software input method has no obligation to trigger this listener.