做期货看资讯什么网站好,linux wordpress,南京做网站群的公司,网站建设规划书 简版前言#xff1a; 最近需要写个app方便工作#xff0c;第一次写app#xff0c;这里做个记录#xff0c;方便以后代码的粘贴复制。 首先编写activity_main.xml#xff0c;其中添加了四个按钮#xff0c;对应四个功能#xff0c;分别为添加服务#xff0c;关闭服务…前言 最近需要写个app方便工作第一次写app这里做个记录方便以后代码的粘贴复制。 首先编写activity_main.xml其中添加了四个按钮对应四个功能分别为添加服务关闭服务发送邮件和提权 ?xml version1.0 encodingutf-8? LinearLayout xmlns:androidhttp://schemas.android.com/apk/res/androidxmlns:apphttp://schemas.android.com/apk/res-autoxmlns:toolshttp://schemas.android.com/toolsandroid:layout_widthmatch_parentandroid:layout_heightmatch_parentandroid:orientationverticaltools:context.MainActivityButtonandroid:idid/btn_startandroid:layout_widthmatch_parentandroid:layout_heightwrap_contentandroid:text调用startService()方法开启服务/Buttonandroid:idid/btn_stopandroid:layout_widthmatch_parentandroid:layout_heightwrap_contentandroid:text关闭服务/Buttonandroid:idid/btn_emainandroid:layout_widthmatch_parentandroid:layout_heightwrap_contentandroid:text测试邮件/Buttonandroid:idid/btn_quanxianandroid:layout_widthmatch_parentandroid:layout_heightwrap_contentandroid:text提升权限//LinearLayout 主界面MainActivity: import android.annotation.SuppressLint; import android.app.Service; import android.content.Context; import android.content.Intent; import android.net.Uri; import android.os.AsyncTask; import android.os.Build; import android.os.Bundle; import android.os.Environment; import android.os.IBinder; import android.util.Log; import android.view.View; import android.widget.Button;import androidx.annotation.Nullable; import androidx.appcompat.app.AppCompatActivity;import java.io.BufferedReader; import java.io.DataOutputStream; import java.io.IOException; import java.io.InputStreamReader; import java.security.Provider;import javax.mail.MessagingException;public class MainActivity extends AppCompatActivity {public static Context mContext;SuppressLint(ResourceType)Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);mContext this;setContentView(R.xml.activity_main);inti();//调用init()方法}//inti()方法在该方法中获取界面控件并实现控件的点击事件。private void inti() {Button btn_start findViewById(R.id.btn_start);Button btn_stop findViewById(R.id.btn_stop);Button btn_emain findViewById(R.id.btn_emain);Button btn_quanxian findViewById(R.id.btn_quanxian);btn_start.setOnClickListener(new View.OnClickListener() {Overridepublic void onClick(View view) {//开启服务 // Intent intent new Intent(MainActivity.this, MyService.class); // startService(intent);Intent service new Intent(getApplicationContext(), MyService.class);if (Build.VERSION.SDK_INT Build.VERSION_CODES.O) {startService(service);}}});btn_stop.setOnClickListener(new View.OnClickListener() {Overridepublic void onClick(View view) {//关闭服务Intent intent new Intent(MainActivity.this, MyService.class);stopService(intent);}});btn_emain.setOnClickListener(new View.OnClickListener() {Overridepublic void onClick(View view) {//发送邮件测试SendEmail sendEmail new SendEmail();sendEmail.execute();}});btn_quanxian.setOnClickListener(new View.OnClickListener() {Overridepublic void onClick(View view) {// 在后台线程中执行获取root权限和执行shell命令的操作new Thread(new Runnable() {Overridepublic void run() {executeShellCommandWithRoot();}}).start();}});} }创建服务 添加服务并创建服务内容为定时执行 import android.app.Service; import android.content.Intent; import android.os.Handler; import android.os.IBinder; import android.util.Log;import java.io.BufferedReader; import java.io.DataOutputStream; import java.io.IOException; import java.io.InputStreamReader; import java.util.Calendar;public class MyService extends Service {private static final String TAG Servicelog;private static final long INTERVAL_MS 24 * 60 * 60 * 1000; // 每24小时执行一次任务private static final int MORNING_HOUR 12;private static final int EVENING_HOUR 20;private Handler handler;private Runnable runnable;//重写Service生命周期中的onCreate()方法Overridepublic void onCreate(){super.onCreate();handler new Handler();runnable new Runnable() {Overridepublic void run() {checkAndSendEmail();handler.postDelayed(this, INTERVAL_MS);}};}//重写Service生命周期中的onStartCommand()方法Overridepublic int onStartCommand(Intent intent, int flags, int startId) {// 获取当前时间Calendar calendar Calendar.getInstance();int currentHour calendar.get(Calendar.HOUR_OF_DAY);// 计算下一个执行任务的时间long delayMs;if (currentHour MORNING_HOUR) {// 计算时间差calendar.set(Calendar.HOUR_OF_DAY, MORNING_HOUR);delayMs calendar.getTimeInMillis() - System.currentTimeMillis();} else if (currentHour EVENING_HOUR) {// 计算时间差calendar.set(Calendar.HOUR_OF_DAY, EVENING_HOUR);delayMs calendar.getTimeInMillis() - System.currentTimeMillis();} else {// 计算时间差calendar.add(Calendar.DAY_OF_MONTH, 1);calendar.set(Calendar.HOUR_OF_DAY, MORNING_HOUR);delayMs calendar.getTimeInMillis() - System.currentTimeMillis();}// 启动定时任务handler.postDelayed(runnable, delayMs);return START_STICKY;}Overridepublic IBinder onBind(Intent intent) {return null;}//重写Service生命周期中的onStartCommand()方法Overridepublic void onDestroy() {Log.i(Myservice,关闭服务执行onDestroy()方法);super.onDestroy();}private void checkAndSendEmail() {//发送邮件测试SendEmail sendEmail new SendEmail();sendEmail.execute();}private void createScreenCapture(){String command1 input keyevent 224\n;String command2 input swipe 300 1000 300 500\n;try {// 执行Shell命令// 执行su命令获取root权限Process suProcess Runtime.getRuntime().exec(su);// 获取su进程的输出流DataOutputStream outputStream new DataOutputStream(suProcess.getOutputStream());Log.d(TAG,command1);// 执行id命令获取用户身份信息outputStream.writeBytes(command1);outputStream.writeBytes(command2);outputStream.flush();// 关闭输出流outputStream.writeBytes(exit\n);outputStream.flush();outputStream.close();// 等待命令执行完成suProcess.waitFor();} catch (IOException | InterruptedException e) {e.printStackTrace();}} }发送邮件 使用 QQ邮件发送邮件并在邮件中添加图片 import android.annotation.SuppressLint; import android.app.AlertDialog; import android.content.ContentResolver; import android.content.ContentUris; import android.content.Context; import android.content.DialogInterface; import android.database.Cursor; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.net.Uri; import android.os.AsyncTask; import android.os.Build; import android.os.Environment; import android.os.Handler; import android.provider.DocumentsContract; import android.provider.MediaStore; import android.util.Log; import android.view.View; import android.widget.Toast;import java.io.ByteArrayOutputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.util.ArrayList; import java.util.List; import java.util.Properties;import javax.mail.Message; import javax.mail.MessagingException; import javax.mail.PasswordAuthentication; import javax.mail.Session; import javax.mail.Transport; import javax.mail.internet.InternetAddress; import javax.mail.internet.MimeBodyPart; import javax.mail.internet.MimeMessage; import javax.mail.internet.MimeMultipart; import javax.mail.util.ByteArrayDataSource;public class SendEmail extends AsyncTaskVoid, Void, Boolean{private static final String SMTP_HOST smtp.qq.com;private static final int SMTP_PORT 465;private static final String USERNAME qqqq.com;private static final String PASSWORD password;private static final String SENDER_EMAIL qqqq.com;private static final String RECIPIENT_EMAIL RECIPIENToutlook.com;private static final String EMAIL_SUBJECT Test;private static final String EMAIL_BODY 邮件正文;private static final String IMAGE_PATH /sdcard/Pictures/01.png;;Overrideprotected void onPostExecute(Boolean success) {if (success) {SendEmail.show(MainActivity.mContext, 邮件发送成功);// 邮件发送成功的处理Log.d(MyTag, 邮件发送成功);} else {SendEmail.show(MainActivity.mContext, 邮件发送失败);// 邮件发送失败的处理Log.d(MyTag, 邮件发送失败);}}Overrideprotected Boolean doInBackground(Void... voids) {try {Log.d(MyTag, 邮件发送。。。。。);Properties props new Properties();props.put(mail.smtp.host, SMTP_HOST);props.put(mail.smtp.port, SMTP_PORT);props.put(mail.smtp.auth, true);props.put(mail.smtp.socketFactory.class, javax.net.ssl.SSLSocketFactory);Session session Session.getInstance(props, new javax.mail.Authenticator() {protected PasswordAuthentication getPasswordAuthentication() {return new PasswordAuthentication(USERNAME, PASSWORD);}});Message message new MimeMessage(session);message.setFrom(new InternetAddress(SENDER_EMAIL));message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(RECIPIENT_EMAIL));message.setSubject(EMAIL_SUBJECT);// 创建邮件内容MimeMultipart content new MimeMultipart();// 添加文本内容MimeBodyPart textPart new MimeBodyPart();textPart.setText(EMAIL_BODY);content.addBodyPart(textPart);// 添加图片MimeBodyPart imagePart new MimeBodyPart();Bitmap bitmap BitmapFactory.decodeFile(IMAGE_PATH);ByteArrayOutputStream stream new ByteArrayOutputStream();bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);byte[] byteArray stream.toByteArray();ByteArrayDataSource dataSource new ByteArrayDataSource(byteArray, image/png);imagePart.setDataHandler(new javax.activation.DataHandler(dataSource));imagePart.setFileName(image.png);content.addBodyPart(imagePart);// 设置邮件内容message.setContent(content);Transport.send(message);return true;} catch (MessagingException e) {e.printStackTrace();return false;}}private static final int DEFAULT_DURATION Toast.LENGTH_SHORT;public static void show(Context context, String message) {show(context, message, DEFAULT_DURATION);}public static void show(Context context, String message, int duration) {final Toast toast Toast.makeText(context, message, duration);// 显示Toasttoast.show();// 延迟一段时间后自动取消ToastHandler handler new Handler();handler.postDelayed(new Runnable() {Overridepublic void run() {toast.cancel();}}, duration Toast.LENGTH_LONG ? 3500 : 2000); // 使用不同的延迟时间来适应不同的Toast持续时间} } 提升权限代码 使用shell命令提升权限需要有root权限 private void executeShellCommandWithRoot() {try {Process process Runtime.getRuntime().exec(su);DataOutputStream outputStream new DataOutputStream(process.getOutputStream());// 在这里执行需要root权限的shell命令// 例如执行 ls 命令outputStream.writeBytes(id\n);outputStream.flush();// 读取命令执行的结果BufferedReader reader new BufferedReader(new InputStreamReader(process.getInputStream()));StringBuilder output new StringBuilder();output.append(reader.readLine()).append(\n);// 输出结果String outputStr output.toString();Log.d(Root, Output: outputStr);// 关闭流outputStream.writeBytes(exit\n);outputStream.flush();outputStream.close();process.waitFor();} catch (IOException | InterruptedException e) {e.printStackTrace();}} 最后AndroidManifest.xml中添加权限 ?xml version1.0 encodingutf-8? manifest xmlns:androidhttp://schemas.android.com/apk/res/androidxmlns:toolshttp://schemas.android.com/toolsapplicationandroid:allowBackuptrueandroid:dataExtractionRulesxml/data_extraction_rulesandroid:fullBackupContentxml/backup_rulesandroid:iconmipmap/ic_launcherandroid:labelstring/app_nameandroid:roundIconmipmap/ic_launcher_roundandroid:supportsRtltrueandroid:themestyle/Theme.MyTestandroid:requestLegacyExternalStoragetruetools:targetApi31activityandroid:name.MainActivityandroid:exportedtruetools:ignoreWrongManifestParentintent-filteraction android:nameandroid.intent.action.MAIN /category android:nameandroid.intent.category.LAUNCHER //intent-filter/activityserviceandroid:name.MyServiceandroid:foregroundServiceTypemediaProjectionandroid:enabledtrueandroid:exportedtruetools:ignoreForegroundServicePermission/service/applicationuses-permission android:nameandroid.permission.INTERNET /uses-permission android:nameandroid.permission.READ_EXTERNAL_STORAGE /uses-permission android:nameandroid.permission.WRITE_EXTERNAL_STORAGE /uses-permission android:nameandroid.permission.MANAGE_EXTERNAL_STORAGE /uses-permission android:nameandroid.permission.FOREGROUND_SERVICE//manifest 上述代码实现了发送邮件和创建服务并执行定时任务但是由于android回收机制一段时间后服务就会被kill不能长久在后台运行需要注意。