我只是在这里学习android,老实说Java。我只是想通过单击按钮切换到不同的活动,但是,它一直在崩溃。当我单击按钮并进行切换时,它会崩溃。有人可以帮我弄清楚我哪里出错了吗?
第一个活动:
package com.example.killacatoe;
import android.os.Bundle;
import android.app.Activity;
import android.view.*;
import android.widget.*;
import android.content.*;
public class TicTacToe extends Activity {//Start TicTactToe Class
//CONSTANTS
//Variables
Button mainButton;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tic_tac_toe);
mainButton = (Button) findViewById(R.id.bPlayNow);
mainButton.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
// TODO Auto-generated method stub
Intent i = new Intent(getApplicationContext(), playerMenu.class);
startActivity(i);
}
});
}
}//End TicTacToe Class
我要跳的活动:
package com.example.killacatoe;
import android.os.Bundle;
import android.app.Activity;
import android.view.*;
import android.widget.*;
public class playerMenu extends Activity {
Button bOnePlayer, bTwoPlayer;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.player);
bOnePlayer = (Button) findViewById(R.id.bOnePlayer);
bOnePlayer.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
// TODO Auto-generated method stub
}
});
bTwoPlayer = (Button) findViewById(R.id.bTwoPlayer);
bTwoPlayer.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
// TODO Auto-generated method stub
}
});
}
}
这是第一个活动的 XML:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#000000"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".TicTacToe" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="30dp"
android:textSize="50dp"
android:text="Welcome to \nTic-Tac-Toe"
android:textColor="#FFFFFF" />
<Button
android:id="@+id/bPlayNow"
android:layout_width="150dp"
android:layout_height="100dp"
android:layout_below="@+id/textView1"
android:layout_centerHorizontal="true"
android:layout_marginTop="137dp"
android:textSize="34dp"
android:text="Play now!" />
</RelativeLayout>
第二个活动的 XML:
<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#000000"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin" >
/>
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:layout_x="78dp"
android:layout_y="30dp"
android:text="GAME MODE"
android:textColor="#FFFFFF"
android:textSize="50dp" />
<Button
android:id="@+id/bOnePlayer"
android:layout_width="250dp"
android:layout_height="wrap_content"
android:layout_x="25dp"
android:layout_y="160dp"
android:text="Single Player"
android:textSize="25dp" />
<Button
android:id="@+id/bTwoPlayer"
android:layout_width="250dp"
android:layout_height="wrap_content"
android:layout_x="25dp"
android:layout_y="220dp"
android:text="Two Player"
android:textSize="25dp" />
</AbsoluteLayout>