Question

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public class HomeActivity extends Activity {
    private static final String TAG = HomeActivity.class.getSimpleName();
    private ImageButton imageButton;
    private ImageButton imageButton2;
    public ImageButton imageButton4;
    public ImageButton imageButton5;
    private ImageView imageView;
    private ImageView imageView2;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_home);

        imageButton = (ImageButton) findViewById(R.id.imageButton);
        imageButton2 = (ImageButton) findViewById(R.id.imageButton2);
        imageButton4 = (ImageButton) findViewById(R.id.imageButton4);
        imageButton5 = (ImageButton) findViewById(R.id.imageButton5);
        imageView = (ImageView) findViewById(R.id.imageView);
        imageView2 = (ImageView) findViewById(R.id.imageView2);


    //Single player button click event
       imageButton4.setOnClickListener(new View.OnClickListener() {
           @Override
           public void onClick(View v) {
        Intent i = new Intent(getApplicationContext(),
                MainActivity.class);
                startActivity(i);
                 finish();
                };},


       //multi player game button event
    imageButton5.setOnClickListener(new View.OnClickListener()  {
        @Override
        public void onClick(View v) {
        Intent i = new Intent(getApplicationContext(),
                MultiPlayer.class);
        startActivity(i);
        finish();
            };}),

    //Settings button event
    imageButton.setOnClickListener(new View.OnClickListener()  {
        @Override
                public void onClick(View v) {
        Intent i = new Intent(getApplicationContext(),
                MusicActivity.class);
        startActivity(i);
        finish();
            }
        });


}}

此代码中存在一个问题，如此＆＃39;）＆＃39;在某个地方失踪了。光标在设置按钮事件中显示缺少的组件。它不是因为这个错误而构建的。缺少＆＃39;）＆＃39;它终止了编译器并且无法构建。

Answer 1

你永远不会在imagebutton4

关闭你的第一个onclicklistener

imageButton4.setOnClickListener**(**new View.OnClickListener() {
           @Override
           public void onClick(View v) {
        Intent i = new Intent(getApplicationContext(),
                MainActivity.class);
                startActivity(i);
                 finish();
                };},

结束行应该是这样的

 }}),

但我并没有真正理解那些背后的kommas

Answer 2

onClickListener出错：

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public class HomeActivity extends Activity {
 private static final String TAG = HomeActivity.class.getSimpleName();
 private ImageButton imageButton;
 private ImageButton imageButton2;
 public ImageButton imageButton4;
 public ImageButton imageButton5;
 private ImageView imageView;
 private ImageView imageView2;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_home);

    imageButton = (ImageButton) findViewById(R.id.imageButton);
    imageButton2 = (ImageButton) findViewById(R.id.imageButton2);
    imageButton4 = (ImageButton) findViewById(R.id.imageButton4);
    imageButton5 = (ImageButton) findViewById(R.id.imageButton5);
    imageView = (ImageView) findViewById(R.id.imageView);
    imageView2 = (ImageView) findViewById(R.id.imageView2);


    //Single player button click event
    imageButton4.setOnClickListener(new View.OnClickListener() {
                                        @Override
                                        public void onClick(View v) {
                                            Intent i = new Intent(getApplicationContext(),
                                                    MainActivity.class);
                                            startActivity(i);
                                            finish();
                                        }});


            //multi player game button event
            imageButton5.setOnClickListener(new View.OnClickListener()  {
                @Override
                public void onClick(View v) {
                    Intent i = new Intent(getApplicationContext(),
                            MultiPlayer.class);
                    startActivity(i);
                    finish();
                }});

            //Settings button event
            imageButton.setOnClickListener(new View.OnClickListener()  {
                @Override
                public void onClick(View v) {
                    Intent i = new Intent(getApplicationContext(),
                            MusicActivity.class);
                    startActivity(i);
                    finish();
                }
            });


}}

）预期或缺失

2 个答案: