Android中的击球游戏
Android 是一个开源操作系统,基于 Linux 内核,用于智能手机、平板电脑等移动设备。此外,它是为智能手表和 Android TV 开发的。他们每个人都有一个专门的接口。 Android 一直是最畅销的智能手机操作系统之一。 Android OS 由 Google 于 2005 年收购的 Android Inc. 开发。
我们将在本文中构建什么?
在这个游戏中,将运行一个 10 秒的计时器,如果我们不能点击它,我们必须点击球图像来增加我们的分数,那么我们的分数保持为零。这是该游戏的示例视频。请注意,我们将使用Java语言构建此应用程序。
分步实施
步骤 1. 创建一个新项目
- 打开一个新项目。
- 我们将使用Java语言开发 Empty Activity。保持所有其他选项不变。
- 将应用程序命名为 user_application。
- 将有两个名为 activity_main.xml 和 MainActivity 的默认文件。Java
如果您不知道如何在 Android Studio 中创建新项目,可以参考如何在 Android Studio 中创建/启动新项目?
步骤 2. 添加所需的依赖项
导航到 Gradle scripts > build.gradle(module) 并在其中使用以下依赖项-
implementation 'com.google.android.material:material:1.3.0'
implementation 'androidx.gridlayout:gridlayout:1.0.0'
步骤 3. 处理 activity_main.xml 文件-
导航到app > res > layout > activity_main.xml并将以下代码添加到该文件。下面是activity_main.xml文件的代码。
XML
Java
package com.example.coronavirusgame;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import android.content.DialogInterface;
import android.content.Intent;
import android.media.Image;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.os.Handler;
import android.os.Looper;
import android.view.View;
import android.view.Window;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import java.util.Random;
public class MainActivity extends AppCompatActivity {
// initialize variables
ImageView[] imageList;
Handler handler;
TextView scoring,killno;
int score;
ImageView imageView,imageView2,imageView3,imageView4,imageView5,imageView6,imageView7,imageView8,imageView9;
Runnable runnable;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// hiding Action bar
requestWindowFeature(Window.FEATURE_NO_TITLE);
getSupportActionBar().hide();
setContentView(R.layout.activity_main);
// assigning variables
scoring=findViewById(R.id.score);
killno=findViewById(R.id.time);
imageView=findViewById(R.id.image_view1);
imageView2=findViewById(R.id.image_view2);
imageView3=findViewById(R.id.image_view3);
imageView4=findViewById(R.id.image_view4);
imageView5=findViewById(R.id.image_view5);
imageView6=findViewById(R.id.image_view6);
imageView7=findViewById(R.id.image_view7);
imageView8=findViewById(R.id.image_view8);
imageView9=findViewById(R.id.image_view9);
imageList=new ImageView[]{imageView,imageView2,imageView3,imageView4,imageView5,imageView6,imageView7,imageView8,imageView9};
makeitgone();
// setting timer to play game
new CountDownTimer(10000,1000)
{
// increasing time
@Override
public void onTick(long l) {
killno.setText("Time : "+l/1000);
}
// When time is finished
@Override
public void onFinish() {
killno.setText("Time Over");
handler.removeCallbacks(runnable);
// using for loop
for (ImageView image:imageList)
{
image.setVisibility(View.INVISIBLE);
}
// dialog box to ask user's input
AlertDialog.Builder alert=new AlertDialog.Builder(MainActivity.this);
alert.setTitle("Try Again!");
alert.setMessage("Do you want to restart?");
// if user want to restart game
alert.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
Intent intent=getIntent();
finish();
startActivity(intent);
}
});
// When user not want to play again
alert.setNegativeButton("No", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
Toast.makeText(MainActivity.this, "Game Over!!!", Toast.LENGTH_SHORT).show();
}
});
alert.show();
}
}.start();
}
private void makeitgone() {
handler=new Handler();
runnable=new Runnable() {
@Override
public void run() {
for(ImageView image:imageList)
{
image.setImageResource(R.drawable.ball);
final Handler handler=new Handler(Looper.getMainLooper());
handler.postDelayed(new Runnable() {
@Override
public void run() {
image.setImageResource(R.drawable.ball);
}
},900);
image.setVisibility(View.INVISIBLE);
}
// making image visible at random positions
Random random=new Random();
int i=random.nextInt(9);
imageList[i].setVisibility(View.VISIBLE);
handler.postDelayed(this,600);
}
};
handler.post(runnable);
}
// increasing score
public void increaseScore(View view) {
score=score+1;
scoring.setText("Score : "+score);
}
}
执行上述代码后,activity_main.xml 文件的 UI 将如下所示——
第 4 步。在 Mainactivity 上工作。Java
转到MainActivity。 Java文件并参考以下代码。下面是MainActivity 的代码。 Java文件。代码中添加了注释以更详细地理解代码。
Java
package com.example.coronavirusgame;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import android.content.DialogInterface;
import android.content.Intent;
import android.media.Image;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.os.Handler;
import android.os.Looper;
import android.view.View;
import android.view.Window;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import java.util.Random;
public class MainActivity extends AppCompatActivity {
// initialize variables
ImageView[] imageList;
Handler handler;
TextView scoring,killno;
int score;
ImageView imageView,imageView2,imageView3,imageView4,imageView5,imageView6,imageView7,imageView8,imageView9;
Runnable runnable;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// hiding Action bar
requestWindowFeature(Window.FEATURE_NO_TITLE);
getSupportActionBar().hide();
setContentView(R.layout.activity_main);
// assigning variables
scoring=findViewById(R.id.score);
killno=findViewById(R.id.time);
imageView=findViewById(R.id.image_view1);
imageView2=findViewById(R.id.image_view2);
imageView3=findViewById(R.id.image_view3);
imageView4=findViewById(R.id.image_view4);
imageView5=findViewById(R.id.image_view5);
imageView6=findViewById(R.id.image_view6);
imageView7=findViewById(R.id.image_view7);
imageView8=findViewById(R.id.image_view8);
imageView9=findViewById(R.id.image_view9);
imageList=new ImageView[]{imageView,imageView2,imageView3,imageView4,imageView5,imageView6,imageView7,imageView8,imageView9};
makeitgone();
// setting timer to play game
new CountDownTimer(10000,1000)
{
// increasing time
@Override
public void onTick(long l) {
killno.setText("Time : "+l/1000);
}
// When time is finished
@Override
public void onFinish() {
killno.setText("Time Over");
handler.removeCallbacks(runnable);
// using for loop
for (ImageView image:imageList)
{
image.setVisibility(View.INVISIBLE);
}
// dialog box to ask user's input
AlertDialog.Builder alert=new AlertDialog.Builder(MainActivity.this);
alert.setTitle("Try Again!");
alert.setMessage("Do you want to restart?");
// if user want to restart game
alert.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
Intent intent=getIntent();
finish();
startActivity(intent);
}
});
// When user not want to play again
alert.setNegativeButton("No", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
Toast.makeText(MainActivity.this, "Game Over!!!", Toast.LENGTH_SHORT).show();
}
});
alert.show();
}
}.start();
}
private void makeitgone() {
handler=new Handler();
runnable=new Runnable() {
@Override
public void run() {
for(ImageView image:imageList)
{
image.setImageResource(R.drawable.ball);
final Handler handler=new Handler(Looper.getMainLooper());
handler.postDelayed(new Runnable() {
@Override
public void run() {
image.setImageResource(R.drawable.ball);
}
},900);
image.setVisibility(View.INVISIBLE);
}
// making image visible at random positions
Random random=new Random();
int i=random.nextInt(9);
imageList[i].setVisibility(View.VISIBLE);
handler.postDelayed(this,600);
}
};
handler.post(runnable);
}
// increasing score
public void increaseScore(View view) {
score=score+1;
scoring.setText("Score : "+score);
}
}
我们的游戏已经准备就绪,这是我们应用程序的最终输出。
输出: