java - Android Studio 中的 "Expected resource of type layout/menu"

Question

    package com.example.nimehr.streaming;
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;
import com.example.videostream.VideoViewActivity;

public class MainActivity extends Activity {
    Button button;

public MainActivity() {
}

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    this.setContentView(2130903040);
    this.button = (Button)this.findViewById(R.id.myButton);
    this.button.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {
            Intent intent = new Intent(MainActivity.this, VideoViewActivity.class);
            MainActivity.this.startActivity(intent);
        }
    });
}

public boolean onCreateOptionsMenu(Menu menu) {
    this.getMenuInflater().inflate(2131165184, menu);
    return true;
}
}

我在 this.setContentView(2130903040); 和 2131165184 中的 2130903040 收到错误“类型布局/菜单的预期资源” >分别在 this.getMenuInflater().inflate(2131165184, menu); 中。我在此处修复了 this.button = (Button)this.findViewById(2131230720);，方法是将其更改为 R.id.MyButton

Answer 1

不要这样做:

this.setContentView(2130903040);

R 类的存在是为了避免像这样显式使用 id，并用更易读的更清晰的代码替换它:

this.setContentView(R.layout.layout_name_here);

来自文档:

When your application is compiled, aapt generates the R class, which contains resource IDs for all the resources in your res/ directory.