Question

我构建了一个程序，其主页面现在包含两个按钮。第二个按钮不起作用。但是第一个按钮启动活动。第二个是＆＃34; btninfo＆＃34;。（InfoActivity在manifest.xml中定义）我已经在下面写了MainActivity的代码：

package com.hesamapps.build;

import android.app.*;
import android.os.*;
import android.view.*;
import android.widget.*;
import android.view.View.*;
import android.content.*;

public class MainActivity extends Activity
{
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        Button btn = (Button) findViewById(R.id.btnmain);
        btn.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v)
            {
                Intent i = new Intent(MainActivity.this, AmazingActivity.class);
                startActivity(i);
            }
        });
        Button btn2 = (Button) findViewById(R.id.btninfo);
        btn2.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v)
            {
                Intent a = new Intent(MainActivity.this,InfoActivity.class);
                  startActivity(a);
            }
            });
}

和下面的InfoActivity：

package com.hesamapps.build;

import android.app.*;
import android.os.*;
import android.widget.*;
import android.view.*;

public class InfoActivity extends Activity
{
    @Override
    public void onStart()
    {
        // TODO: Implement this method
        super.onStart();
        setContentView(R.layout.info);
    }
}

按钮必须启动InfoActivity，但它会强制关闭错误。（按钮是＆＃34; btninfo＆＃34;）

启动另一个Activity时出错

0 个答案: