[英]Errors in Mainactivity.java
I have the following code and I can't find a way to get rid of these errors: 我有以下代码,但找不到消除这些错误的方法:
The method setOnClickListener(View.OnClickListener) in the type View is not applicable for the arguments (MainActivity)
视图类型中的方法setOnClickListener(View.OnClickListener)不适用于参数(MainActivity)
This applies to the lines 17, 18, 19, 20, 21, 22, 23, 24, 25 containing: 这适用于第17、18、19、20、21、22、23、24、25行,其中包含:
findViewById(R.id.imageButton9).setOnClickListener(this);
In line 31 (the line where the new class is created), I get: 在第31行(创建新类的行)中,我得到:
The nested type MainActivity cannot hide an enclosing type
嵌套类型MainActivity无法隐藏封闭类型
This is the code I'm working with: 这是我正在使用的代码:
package com.example.rome;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.EditText;
import android.widget.Button;
import android.view.View;
import android.widget.Toast;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
findViewById(R.id.imageButton1).setOnClickListener(this);
findViewById(R.id.imageButton2).setOnClickListener(this);
findViewById(R.id.imageButton3).setOnClickListener(this);
findViewById(R.id.imageButton4).setOnClickListener(this);
findViewById(R.id.imageButton5).setOnClickListener(this);
findViewById(R.id.imageButton6).setOnClickListener(this);
findViewById(R.id.imageButton7).setOnClickListener(this);
findViewById(R.id.imageButton8).setOnClickListener(this);
findViewById(R.id.imageButton9).setOnClickListener(this);
}
class MainActivity extends Activity implements View.OnClickListener {
@Override
public void onClick(View v){
switch(v.getId()){
case R.id.R.id.imagebutton1:
startActivity(new Intent(telefoonnummers.class));
break;
case R.id.R.id.imagebutton2:
startActivity(new Intent(telefoonnummers.class));
break;
//-- more cases --
case R.id.R.id.imagebutton9:
startActivity(new Intent(telefoonnummers.class));
break;
}
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
Remove the errant class definition: 删除错误的类定义:
class MainActivity extends Activity implements View.OnClickListener {
And add implements View.OnClickListener
to the real class definition: 并将
implements View.OnClickListener
添加到真实的类定义中:
public class MainActivity extends Activity implements View.OnClickListener {
// Add this to the "real" MainActivity ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Take a moment to make sure you have properly closed every brace ( {}
). 请花一点时间确保已正确合上每个大括号(
{}
)。
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