java - 启动画面后加载 SecondActivity 时出错

Question

我遇到了关于我的 SecondActivity Intent 的问题，主要 Activity 是带有进度条的初始屏幕。进度条间隔加载正常，当涉及到切换到下一部分并继续进行第二个 Activity 时，我收到一些无法追踪的错误并且非常忙。这是我的第二个 Activity 的代码:

package com.example.waleedmalik.computerparts;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.ToggleButton;

public class SecondActivity extends AppCompatActivity {


ToggleButton tb;
Button btn;
public static boolean tbflag;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_second);
    tb = (ToggleButton)findViewById(R.id.toggleButton1);
    btn = (Button)findViewById(android.R.id.button1);

    btn.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            tbflag = tb.isChecked();
            Intent in = new Intent(getApplicationContext(),
       GameActivity.class);

     startActivity(in);

    }

    });

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_second, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
   }
}

Answer 1

像这样更改按钮初始化:

作为

btn = (Button)findViewById(android.R.id.button1);

线到

btn = (Button)findViewById(R.id.button1);