Android 实现弹球游戏

一，知识点。

1，如何自定义View，以及重写它的onDraw方法.

2，Intent实现界面跳转。

3，线程的使用。

4，弹出框框的使用。

二，具体实现代码。

MainLayout文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@drawable/bg1"
>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_marginTop="150dp"
android:layout_marginLeft="50dp"
>
<Button
android:id="@+id/start_btn"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="开始游戏" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/exit_btn"
android:text="退出游戏"
/>

</LinearLayout>

</LinearLayout>


MainActivity文件
package com.example.my.fivegame;

import android.app.Application;
import android.content.Context;
import android.content.Intent;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.Display;
import android.view.MotionEvent;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.Timer;
import java.util.TimerTask;
import java.util.Vector;

public class MainActivity extends AppCompatActivity implements View.OnClickListener{

private Button start_btn,exit_btn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

start_btn= (Button) findViewById(R.id.start_btn);
exit_btn= (Button) findViewById(R.id.exit_btn);
start_btn.setOnClickListener(this);
exit_btn.setOnClickListener(this);
}

@Override
protected void onRestart() {
super.onRestart();
Toast.makeText(this, "其实你无论选择什么都会回到这个界面，想不到吧", Toast.LENGTH_LONG).show();

}

@Override
public void onClick(View v) {
switch (v.getId())
{
case R.id.start_btn:
{
Intent i = new Intent();
i.setClass(MainActivity.this, Main2Activity.class);
this.startActivity(i);
break;
}
case R.id.exit_btn:
{
System.exit(0);
break;
}
}
}
}


Main2Activity文件

package com.example.my.fivegame;

import android.content.Context;
import android.content.DialogInterface;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.Display;
import android.view.MotionEvent;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.Timer;
import java.util.TimerTask;

public class Main2Activity extends AppCompatActivity {
private int tableWidth;
private int tableHeight;
private int racketY;
private final int RACKET_HEIGHT=30;
private final int RACKET_WIDTH=120;
private final int BALL_SIZE=16;
private int y_Speed=30;
private Random rand=new Random();
private double xyRate=rand.nextDouble()-0.5;
private int x_Speed=(int)(y_Speed*xyRate*2);
private int ballX=rand.nextInt(200)-20;
private int ballY=700;
private int racketX=rand.nextInt(200);
public boolean isLose=false;
private int nowRow=5;
private int nowRol=7;
private int[][] mp=new int[nowRow][nowRol];;
private int blocks_Wide=RACKET_WIDTH+40;
private int blocks_Height=RACKET_HEIGHT*2;
private int startX_block=25;
private int startY_block=100;
private int[] colormp={Color.RED,Color.GREEN,Color.BLUE,Color.YELLOW};
private int IntervalX=20;
private int IntervalY=30;
private int scores=0;
private AlertDialog.Builder builder;
private List<Main2Activity.mubiao> Anim=new ArrayList<Main2Activity.mubiao>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.activity_main2);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
final Main2Activity.GameView gameView=new Main2Activity.GameView(this);
setContentView(gameView);
gameView.setBackgroundResource(R.drawable.bg4);
WindowManager windowManager=getWindowManager();
Display display=windowManager.getDefaultDisplay();
DisplayMetrics metrics=new DisplayMetrics();
display.getMetrics(metrics);
tableHeight=metrics.heightPixels;
tableWidth=metrics.widthPixels;
racketY=tableHeight-300;
builder=new AlertDialog.Builder(this);
builder.setTitle("提示");
builder.setMessage("是否重开一局吗？");
builder.setPositiveButton("这次是意外，重开", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
Main2Activity.this.finish();
}
});
builder.setNegativeButton("认怂，就不重开", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
Main2Activity.this.finish();

}
});

Toast.makeText(this, racketY+"与"+tableHeight, Toast.LENGTH_SHORT).show();
initmp();
final Handler handler=new Handler()
{
@Override
public void handleMessage(Message msg) {
if(msg.what==0x123)
gameView.invalidate();
}
};
gameView.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
float x,y;
switch (event.getAction())
{
case MotionEvent.ACTION_DOWN: {
x = event.getX();
y = event.getY();
}
case MotionEvent.ACTION_MOVE:
{
racketX=(int)event.getX();
return true;
}

}
return false;
}
});

final Thread thread= new Thread()
{
boolean IsClick=false;
@Override
public void run() {
for(int i=0;i<Anim.size();i++)
{
int left=Anim.get(i).left;
int right=Anim.get(i).right;
int top=Anim.get(i).top;
int botton=Anim.get(i).botton;
if(ballY-5>=top&&ballY-5<=botton&&ballX-5>=left&&ballX+5<=right)
{
scores+=10;
if (ballY - 5 >= top && ballY - 5 <= botton) {
y_Speed = -y_Speed;
Anim.remove(i);
break;
}
if (ballX - 5 >= left && ballX + 5 <= right) {
x_Speed = -x_Speed;
Anim.remove(i);
break;
}
}
}
}
};
final Timer timer=new Timer();
timer.schedule(new TimerTask() {
@Override
public void run() {
if(ballX<=0||ballX>=tableWidth-BALL_SIZE)
{
x_Speed=-x_Speed;
}
if(ballY>=racketY-BALL_SIZE&&(ballX<=racketX||ballX>racketX+RACKET_WIDTH))
{
timer.cancel();
isLose=true;
}
else if(ballY<=0||(ballY>=racketY-BALL_SIZE&&ballX>racketX&&ballX<=racketX+RACKET_WIDTH))
{
y_Speed=-y_Speed;
}
ballX+=x_Speed;
ballY+=y_Speed;
thread.start();
handler.sendEmptyMessage(0x123);
if(Anim.size()==0)
{
Toast.makeText(Main2Activity.this, "恭喜你成功吃完所有球", Toast.LENGTH_SHORT).show();
Main2Activity.this.finish();
}
}
},0,60);
}
void initmp()
{
scores=0;
for(int i=0;i<nowRow;i++)
{
for(int j=0;j<nowRol;j++)
{
mp[i][j]=rand.nextInt(4);
}
}
int top,botton;
top=startY_block;
botton=blocks_Height+startY_block;
for(int i=0;i<nowRow;i++)
{
if(i!=0) {
top += blocks_Height + IntervalY;
botton+=blocks_Height + IntervalY;
}
int left,right;
left=startX_block;
right=startX_block+blocks_Wide;
for(int j=0;j<nowRol;j++)
{
if(j!=0)
{
left+=IntervalX+blocks_Wide;
right+=IntervalX+blocks_Wide;
}
Main2Activity.mubiao one=new Main2Activity.mubiao();
one.left=left;
one.right=right;
one.top=top;
one.botton=botton;
one.colorid=mp[i][j];
Anim.add(one);
}
}
}

class GameView extends View
{
Paint paint=new Paint();
public GameView(Context context) {
super(context);
setFocusable(true);
}

@Override
protected void onDraw(Canvas canvas) {
paint.setStyle(Paint.Style.FILL);
paint.setAntiAlias(true);
for(int i=0;i<Anim.size();i++)
{
int left=Anim.get(i).left;
int right=Anim.get(i).right;
int top=Anim.get(i).top;
int botton=Anim.get(i).botton;
paint.setColor(colormp[Anim.get(i).colorid]);
canvas.drawRect(left,top,right,botton,paint);
}

if (isLose) {
paint.setColor(Color.RED);
paint.setTextSize(40);
canvas.drawText("游戏结束,你的最终的分为："+scores, tableWidth/2-300, tableHeight/2+tableHeight/4, paint);
Toast.makeText(Main2Activity.this, "你可以按返回键重新开始游戏", Toast.LENGTH_SHORT).show();
builder.create().show();
}
else
{
paint.setColor(Color.GREEN);
paint.setTextSize(50);
canvas.drawText("得分:"+scores, tableWidth/2-100, 50, paint);
paint.setColor(Color.BLUE);
canvas.drawCircle(ballX,ballY,BALL_SIZE,paint);
paint.setColor(Color.BLACK);
canvas.drawRect(racketX,racketY,racketX+RACKET_WIDTH,RACKET_HEIGHT+racketY,paint);
}
super.onDraw(canvas);
}
}

class mubiao
{
public int left,right,top,botton;
public boolean IsClick=false;
public int colorid;
}
}


实现效果：