Question

我在此代码的末尾收到上述错误：

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);


    button= (ImageButton)findViewById(R.id.imgButton);
    button.setOnClickListener(imgButtonHandler);

    button1= (ImageButton)findViewById(R.id.imgButton1);
    button1.setOnClickListener(imgButtonHandler1);

    button2= (ImageButton)findViewById(R.id.imgButton2);
    button2.setOnClickListener(imgButtonHandler2);

    button3= (ImageButton)findViewById(R.id.imgButton3);
    button3.setOnClickListener(imgButtonHandler3);


    }

这是其后的代码：

View.OnClickListener imgButtonHandler = new View.OnClickListener() {

        public void onClick(View v) {
            button.setImageResource(R.drawable.whiteon);
            button1.setImageResource(R.drawable.redoff);
            button2.setImageResource(R.drawable.yellowoff);
            button3.setImageResource(R.drawable.greenoff);

            TextView text = (TextView) findViewById(R.id.textViewcategory);
            text.setText("WHITE (Hi-Po)");

        }
    };

    View.OnClickListener imgButtonHandler1 = new View.OnClickListener() {

        public void onClick(View v) {
            button1.setImageResource(R.drawable.redon);
            button.setImageResource(R.drawable.whiteoff);
            button2.setImageResource(R.drawable.yellowoff);
            button3.setImageResource(R.drawable.greenoff);

            TextView text = (TextView) findViewById(R.id.textViewcategory);
            text.setText("RED (Significant)");

        }
    };

    View.OnClickListener imgButtonHandler2 = new View.OnClickListener() {

        public void onClick(View v) {
            button2.setImageResource(R.drawable.yellowon);
            button.setImageResource(R.drawable.whiteoff);
            button1.setImageResource(R.drawable.redoff);
            button3.setImageResource(R.drawable.greenoff);

            TextView text = (TextView) findViewById(R.id.textViewcategory);
            text.setText("YELLOW (Serious)");

        }
    };
    View.OnClickListener imgButtonHandler3 = new View.OnClickListener() {

        public void onClick(View v) {
            button3.setImageResource(R.drawable.greenon);
            button.setImageResource(R.drawable.whiteoff);
            button1.setImageResource(R.drawable.redoff);
            button2.setImageResource(R.drawable.yellowoff);

            TextView text = (TextView) findViewById(R.id.textViewcategory);
            text.setText("GREEN (Important)");


        }
    };

我已尝试按要求删除令牌，但是当我这样做时，它会说所有＆＃34; imgButtonHandler＆＃34; s无法解析为变量。

非常感谢任何帮助。

非常感谢

Answer 1

请尝试这种方式，希望这有助于您解决问题。

public class MainActivity extends Activity {

    private TextView text;
    private ImageButton button;
    private ImageButton button1;
    private ImageButton button2;
    private ImageButton button3;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        text = (TextView) findViewById(R.id.textViewcategory);

        button= (ImageButton)findViewById(R.id.imgButton);
        button.setOnClickListener(imgButtonHandler);

        button1= (ImageButton)findViewById(R.id.imgButton1);
        button1.setOnClickListener(imgButtonHandler1);

        button2= (ImageButton)findViewById(R.id.imgButton2);
        button2.setOnClickListener(imgButtonHandler2);

        button3= (ImageButton)findViewById(R.id.imgButton3);
        button3.setOnClickListener(imgButtonHandler3);


    }

    View.OnClickListener imgButtonHandler = new View.OnClickListener() {

        public void onClick(View v) {
            button.setImageResource(R.drawable.whiteon);
            button1.setImageResource(R.drawable.redoff);
            button2.setImageResource(R.drawable.yellowoff);
            button3.setImageResource(R.drawable.greenoff);

            text.setText("WHITE (Hi-Po)");

        }
    };

    View.OnClickListener imgButtonHandler1 = new View.OnClickListener() {

        public void onClick(View v) {
            button1.setImageResource(R.drawable.redon);
            button.setImageResource(R.drawable.whiteoff);
            button2.setImageResource(R.drawable.yellowoff);
            button3.setImageResource(R.drawable.greenoff);

            text.setText("RED (Significant)");

        }
    };

    View.OnClickListener imgButtonHandler2 = new View.OnClickListener() {

        public void onClick(View v) {
            button2.setImageResource(R.drawable.yellowon);
            button.setImageResource(R.drawable.whiteoff);
            button1.setImageResource(R.drawable.redoff);
            button3.setImageResource(R.drawable.greenoff);

            text.setText("YELLOW (Serious)");

        }
    };
    View.OnClickListener imgButtonHandler3 = new View.OnClickListener() {

        public void onClick(View v) {
            button3.setImageResource(R.drawable.greenon);
            button.setImageResource(R.drawable.whiteoff);
            button1.setImageResource(R.drawable.redoff);
            button2.setImageResource(R.drawable.yellowoff);

            text.setText("GREEN (Important)");

        }
    };
}

Answer 2

更改后面的代码，使其看起来像：

@Override
    public void onClick(View v) {
        switch (v.getId()) {
case R.id.R.id.imgButton3:
button3.setImageResource(R.drawable.greenon);
            button.setImageResource(R.drawable.whiteoff);
            button1.setImageResource(R.drawable.redoff);
            button2.setImageResource(R.drawable.yellowoff);

            TextView text = (TextView) findViewById(R.id.textViewcategory);
            text.setText("GREEN (Important)");
break;
case R.id.R.id.imgButton2:
 button2.setImageResource(R.drawable.yellowon);
            button.setImageResource(R.drawable.whiteoff);
            button1.setImageResource(R.drawable.redoff);
            button3.setImageResource(R.drawable.greenoff);

            TextView text = (TextView) findViewById(R.id.textViewcategory);
            text.setText("YELLOW (Serious)");
break;
case R.id.R.id.imgButton1:
  button1.setImageResource(R.drawable.redon);
            button.setImageResource(R.drawable.whiteoff);
            button2.setImageResource(R.drawable.yellowoff);
            button3.setImageResource(R.drawable.greenoff);

            TextView text = (TextView) findViewById(R.id.textViewcategory);
            text.setText("RED (Significant)");
break;
case R.id.R.id.imgButton:
 button.setImageResource(R.drawable.whiteon);
            button1.setImageResource(R.drawable.redoff);
            button2.setImageResource(R.drawable.yellowoff);
            button3.setImageResource(R.drawable.greenoff);

            TextView text = (TextView) findViewById(R.id.textViewcategory);
            text.setText("WHITE (Hi-Po)");
break;

}
}

令牌“}”上的语法错误，删除此令牌

2 个答案: