半期考试 质数计算

Posted 梦想家哈儿和他的bug

tags:

篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了半期考试 质数计算相关的知识,希望对你有一定的参考价值。

效果:


权限声明:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.exam02_2">

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity
            android:name=".HistoryActivity"
            android:label="计算结果">
        </activity>
        <activity android:name=".MainActivity"
            android:label="质数计算">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

布局文件

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_margin="10dp"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="开始 : " />

        <EditText
            android:id="@+id/editText_start"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Please input start"
            android:inputType="number" />

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="结束 : " />

        <EditText
            android:id="@+id/editText_end"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Please input end"
            android:inputType="number" />

    </LinearLayout>

    <TextView
        android:id="@+id/num_result"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="10dp"
        android:layout_marginTop="10dp"
        android:text="已经计算出了0个质数" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:orientation="horizontal">

            <Button
                android:id="@+id/start"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginRight="10dp"
                android:onClick="start"
                android:text="开始计算" />

            <Button
                android:id="@+id/end"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:onClick="end"
                android:text="结束计算" />

        </LinearLayout>

    </LinearLayout>

</LinearLayout>

activity_history.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".HistoryActivity">

    <ListView
        android:id="@+id/listview"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginStart="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginRight="8dp"
        android:layout_marginBottom="8dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>

notification_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="60dp"
    android:orientation="horizontal">

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@mipmap/ic_launcher_round" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="计算完成"
                android:textSize="20sp" />

            <TextView
                android:id="@+id/time"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="11:23" />

        </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">

            <TextView
                android:id="@+id/count"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="end"
                android:text="共有10个质数" />

        </LinearLayout>

    </LinearLayout>

</LinearLayout>

.java

mainActivity.java

public class MainActivity extends AppCompatActivity 

    private EditText editText_start;
    private EditText editText_end;
    private TextView textView_result;
    private boolean flag;
    ArrayList<Integer> history = new ArrayList<Integer>();

    private final static String myChannel = "lys";
    public final static String filename = "historyList";
    @Override
    protected void onCreate(Bundle savedInstanceState) 
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        init();
        if(ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)!= PackageManager.PERMISSION_GRANTED)
            ActivityCompat.requestPermissions(this,new String[]Manifest.permission.WRITE_EXTERNAL_STORAGE,0);
        
    

    public void init()
        editText_end = findViewById(R.id.editText_end);
        editText_start = findViewById(R.id.editText_start);
        textView_result = findViewById(R.id.num_result);
        flag = true;
    

    public void start(View v)
        int begin = Integer.parseInt(editText_start.getText().toString());
        int end = Integer.parseInt(editText_end.getText().toString());
        flag = true;
        new MyAsyncTask().doInBackground(begin,end);
    

    public void end(View v)
        flag =false;
    

    public void save()
        try
            File path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
            File file = new File(path,filename);
            FileOutputStream out = new FileOutputStream(file,true);
            OutputStreamWriter writer = new OutputStreamWriter(out);

            for(int i=0;i<history.size();i++)
                writer.write("第"+(i+1)+"个质数是:"+history.get(i)+"\\r\\n");
            
            writer.close();
            out.close();
            //BufferedOutputStream writer=new BufferedOutputStream(new OutputStream(out));
        catch (Exception e)
            e.printStackTrace();
        
    

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) 
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if(requestCode == 0)
            if(grantResults[0]==PackageManager.PERMISSION_GRANTED)

            else
                ActivityCompat.requestPermissions(this,new String[]Manifest.permission.WRITE_EXTERNAL_STORAGE,0);
            
        
    

    //显示History菜单
    @Override
    public boolean onCreateOptionsMenu(Menu menu) 
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.main_menu,menu);
        return super.onCreateOptionsMenu(menu);
    

    @Override
    public boolean onOptionsItemSelected(MenuItem item) 
        switch (item.getItemId())
            case R.id.action_history:
               // saveHistory();
                save();
                Intent intent = new Intent(MainActivity.this, HistoryActivity.class);
                //intent.putStringArrayListExtra("history",res_list);
                startActivity(intent);
                return true;
        
        return super.onOptionsItemSelected(item);
    

    public void sendNotification(Integer integer)
        //NotificationManager管理通知
        NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        if (android.os.Build半期考试 质数计算

半期考试 质数计算

半期考试 之 多线程2

半期考试 之 多线程2

半期考试 之 多线程2

半期考试 之 文件存储