Android Studio中的OnClickListener
我正在尝试使用新的Android Studio开发和应用,但是我的OnClickListener始终收到重大错误。主要是告诉我它无法解析符号“
setOnClickListener”,也无法解析“ View v”
package com.sigmachi.derbydays;import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
Button button= (Button) findViewById(R.id.standingsButton);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
startActivity(new Intent(MainActivity.this,StandingsActivity.class));
}
});
那是班上的代码
Information:Compilation completed with 11 errors and 0 warnings in 4 secInformation:11 errors
Information:0 warnings
/Users/angelo/AndroidStudioProjects/SigmaChiDerbyDaysProject/SigmaChiDerbyDays/src/main/java/com/sigmachi/derbydays/MainActivity.java
Error:Error:line (28)Gradle: <identifier> expected
Error:Error:line (28)Gradle: illegal start of type
Error:Error:line (28)Gradle: ')' expected
Error:Error:line (28)Gradle: ';' expected
Error:Error:line (28)Gradle: invalid method declaration; return type required
Error:Error:line (30)Gradle: illegal start of type
Error:Error:line (30)Gradle: ';' expected
Error:Error:line (30)Gradle: ')' expected
Error:Error:line (30)Gradle: not a statement
Error:Error:line (30)Gradle: ';' expected
Error:Error:line (33)Gradle: illegal start of type
这些是我收到的错误,绝对没有道理。28行开始于button.setOnClickListener
编辑:现在当我按下按钮时,我收到一个强制关闭
这是应该打开的类,仅有的类是唯一的变化是要打开的布局
package com.sigmachi.derbydays;import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
public class StandingsActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.standings_layout);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
回答:
Button button= (Button) findViewById(R.id.standingsButton);button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
startActivity(new Intent(MainActivity.this,StandingsActivity.class));
}
});
此代码不是任何方法。如果要使用它,它必须位于类似OnCreate()
protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button= (Button) findViewById(R.id.standingsButton);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
startActivity(new Intent(MainActivity.this,StandingsActivity.class));
}
});
}
以上是 Android Studio中的OnClickListener 的全部内容, 来源链接: utcz.com/qa/402635.html