package com.music.zhangdaosen; import android.annotation.SuppressLint; import android.content.ContentResolver; import android.content.Context; import android.database.Cursor; import android.net.Uri; import android.provider.MediaStore; import android.util.Log; import android.widget.ArrayAdapter; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Date; import java.util.List; public class SongHelper { public static List<Song>musicList = new ArrayList<>(); // static List<Song>musicList; public static List<Song> getLocalMusic(Context context){ Uri uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI; ContentResolver resolver = context.getContentResolver(); Cursor cursor = resolver.query(uri,null,null,null,null); if(cursor !=null){ Song song; while (cursor.moveToNext()){ song =new Song(); int index = cursor.getColumnIndex(MediaStore.Audio.Media.DISPLAY_NAME); song.name = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DISPLAY_NAME)); song.singer = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.ARTIST)); song.path = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA)); song.duration = cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DURATION)); Log.d("SongHelper--keyar","get"+song.name+" "+song.duration); musicList.add(song); SimpleDateFormat sdf = new SimpleDateFormat("mm:ss"); String time = sdf.format(new Date(song.duration)); } Log.d("SongHelper--keyar","get musicList"+ musicList.size()); } cursor.close(); return musicList; } public static String changeTime(int duration){ int min = duration/1000/60; int sec = duration/1000%60; if(sec<10){ return min+":0"+sec; } return min+":"+sec; } }

SpringBoot整合EhCache2.x实现缓存详细教程

import org.springframework.context.annotation.Configuration; @Configuration @EnableCaching public class AppConfig { // ... } 4. 使用缓存：现在可以在服务层或者DAO层的方法上使用@Cacheable、@...

javax.servlet-api中英文API对照文档及依赖指南

描述中还提到，该文档包含了多个Java包，这些包是javax.servlet-api的一部分，比如"javax.servlet"，"javax.servlet.annotation"等。这些包涵盖了多种接口、类、枚举等，用于实现网络请求和响应的处理，如...

package com.example.login; import androidx.appcompat.app.AppCompatActivity; import android.annotation.SuppressLint; import android.content.ContentValues; import android.content.Context; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; import android.os.Bundle; import android.view.View; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.EditText; import android.widget.ListView; import android.widget.SimpleCursorAdapter; import android.app.AlertDialog; import android.content.DialogInterface; import android.widget.Spinner; import android.widget.Toast;

这是一个 Android 应用程序中的 Java 代码片段，用于实现一个登录功能。它包含了一些 Android 库的导入，如 AppCompatActivity，ListView 等等。这段代码还实现了与数据库的交互，通过 SQLiteDatabase、...

package com.example.photodiary; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.os.Environment; import android.provider.MediaStore; import android.view.View; import android.widget.Button; import androidx.annotation.Nullable; import androidx.appcompat.app.AppCompatActivity; import androidx.core.content.FileProvider; import androidx.recyclerview.widget.LinearLayoutManager; import androidx.recyclerview.widget.RecyclerView; import java.io.File; import java.io.IOException; import java.text.SimpleDateFormat; import java.util.Date; public class Diary extends AppCompatActivity { public static final int REQUEST_CODE_CAMERA = 1001; @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_diary); /* //设置 RecyclerView 的布局管理器和适配器 RecyclerView recyclerView = findViewById(R.id.recycler_view); recyclerView.setLayoutManager(new LinearLayoutManager(this)); recyclerView.setAdapter(new MyAdapter()); */ //点击按钮启动系统相机 Button button = findViewById(R.id.button_2); Intent intent = new Intent(this,CameraX.class); button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { startActivity(intent); } }); } }

这段代码是一个名为 "Diary" 的活动类，继承自 "AppCompatActivity" 类。在这个活动中，有一个常量 "REQUEST_CODE_CAMERA"，它的值为 1001，用于在启动相机时标识请求。在 "onCreate" 方法中，调用了父类的 ...

package com.oplus.utrace.sdk import android.annotation.SuppressLint import android.content.Context @SuppressLint("StaticFieldLeak") object UTraceApp { internal lateinit var mContext: Context private lateinit var mPkgName: String fun init(context: Context){ this.mContext = context this.mPkgName = context.packageName } fun getPkgName() = if (this::mPkgName.isInitialized) mPkgName else "" /** * 设置自定义log */ fun setLogger(logger: IULogger?, keepLogcat: Boolean = true) { ULog.mLogger = logger ULog.mKeepLogcat = keepLogcat } }如何进行代码保留全部代码

-keep class com.oplus.utrace.sdk.UTraceApp { *; } 其中，* 表示保留该类的所有成员和方法。完整的 proguard-rules.pro 文件示例如下： # 保留 UTraceApp 类的所有代码 -keep class ...

import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ImageView; import androidx.annotation.NonNull; import androidx.recyclerview.widget.RecyclerView;

这段代码是导入了一些 Android 常用的类，包括 LayoutInflater、View、ViewGroup、ImageView 等。其中，LayoutInflater 用于将布局文件解析成视图对象，View 和 ViewGroup 用于创建和操作视图对象，...

ackage com.example.noteapp281.adapter; import android.app.Dialog; import android.content.Context; import android.content.Intent; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; import androidx.annotation.NonNull; import androidx.recyclerview.widget.RecyclerView; import com.example.noteapp281.EditActivity; import com.example.noteapp281.NoteDbOpenHelper; import com.example.noteapp281.R; import com.example.noteapp281.bean.Note; import com.example.noteapp281.util.ToastUtil; import java.util.List; public class MyAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> { private List<Note> mBeanList; private LayoutInflater mLayoutInflater; private Context mContext; private NoteDbOpenHelper mNoteDbOpenHelper; private int viewType; public static int TYPE_LINEAR_LAYOUT = 0; public static int TYPE_GRID_LAYOUT = 1; public MyAdapter(Context context, List<Note> mBeanList) { this.mBeanList = mBeanList; this.mContext = context; mLayoutInflater = LayoutInflater.from(mContext); mNoteDbOpenHelper = new NoteDbOpenHelper(mContext); } public void setViewType(int viewType) { this.viewType = viewType; } @Override public int getItemViewType(int position) { return viewType; } @NonNull @Override public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) { View view = null; if (viewType == TYPE_LINEAR_LAYOUT) { view = mLayoutInflater.inflate(R.layout.list_item_layout, parent, false); MyViewHolder myViewHolder = new MyViewHolder(view); return myViewHolder; } else if (viewType == TYPE_GRID_LAYOUT) { view = mLayoutInflater.inflate(R.layout.list_item_grid_layout, parent, false); MyGridViewHolder myGridViewHolder = new MyGridViewHolder(view); return myGridViewHolder; }else { return null;

这段代码是关于一个 RecyclerView 的适配器的实现，其中定义了两种不同的布局类型，分别是线性布局和网格布局。根据不同的类型创建不同的 ViewHolder，并且重写了 getItemViewType() 方法来获取当前 item 的类型。...

package com.study.food.adaptor; import android.view.View; import androidx.annotation.NonNull; import com.chad.library.adapter.base.viewholder.BaseViewHolder; public class XBaseViewHolder extends BaseViewHolder { public XBaseViewHolder(@NonNull View view) { super(view); } public int getItemPosition() { return getItemPosition(); } }

这是一个基于BaseViewHolder的自定义ViewHolder，其中getItemPosition方法存在递归调用的问题，应该返回当前ViewHolder所在的位置，可以将其改为： java public int getItemPosition() { return ...

package com.blog; import android.content.Context; import android.content.Intent; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; import androidx.annotation.NonNull; import androidx.recyclerview.widget.RecyclerView; import java.util.ArrayList; public class SimpleAdapter extends RecyclerView.Adapter<SimpleAdapter.ViewHolder> { private final ArrayList<String> examples; private final ViewHolderListener viewHolderListener; private final Context context; public SimpleAdapter(Context context, ArrayList<String> examples, ViewHolderListener viewHolderListener) { this.context = context; this.examples = examples; this.viewHolderListener = viewHolderListener; } public void setViewHolderListener(ViewHolderListener viewHolderListener) { } public interface ViewHolderListener { void onItemClicked(View view, int adapterPosition); } @NonNull @Override public SimpleAdapter.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) { View view = LayoutInflater.from(parent.getContext()) .inflate(R.layout.list_item_layout, parent, false); return new SimpleAdapter.ViewHolder(view, viewHolderListener); } @Override public void onBindViewHolder(@NonNull SimpleAdapter.ViewHolder holder, int position) { holder.tvContent.setText(examples.get(position)); } @Override public int getItemCount() { return examples.size(); } static class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener { private final TextView tvContent; private final ViewHolderListener viewHolderListener; ViewHolder(View itemView, ViewHolderListener viewHolderListener) { super(itemView); tvContent = itemView.findViewById(R.id.tv_content); this.viewHolderListener = viewHolderListener; itemView.findViewById(R.id.all_layout).setOnClickListener(this); } @Override public void onClick(View view) { if (null != viewHolderListener) { viewHolderListener.onItemClicked(view, getAdapterPosition()); // 点击后跳转到新的 Activity Intent intent = new Intent(view.getContext(), BaseActivity.class); view.getContext().startActivity(intent); } } } }这段代码什么意思

这段代码实现了一个简单的RecyclerView适配器，用于在Android应用程序中显示一组字符串列表。具体来说，这个适配器包含了一个ViewHolderListener接口，用于处理列表项的点击事件。当用户点击列表项时，会触发...

解释代码package com.example.myapplication_7; import android.annotation.SuppressLint; import android.os.Handler; import android.os.Message; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.ImageView; import android.widget.TextView; import android.widget.Toast; import androidx.annotation.NonNull; import androidx.appcompat.app.AppCompatActivity; import java.util.Random; public class MainActivity extends AppCompatActivity { public static final int MSG_CODE = 87987987; public static final int MAX_NUMBER = 20; public static final int RANDOM_NUMBER = 500; private TextView result_View,cd_view; private Button start_Btn; private ImageView diglet_View; private int totalCount,hitCount,steps,delayTime; private int[][] position_Array; //将消息传给主线程 private Handler handler = new Handler(){ @SuppressLint("HandlerLeak") @Override public void handleMessage(@NonNull Message msg) { super.handleMessage(msg); switch (msg.what){ case MSG_CODE: //点击次数大于20时游戏结束 if (totalCount > MAX_NUMBER){ clear(); //游戏结束，Toast弹窗提示 Toast.makeText(MainActivity.this, "游戏结束", Toast.LENGTH_SHORT).show(); return; } int cc = MAX_NUMBER-totalCount; cd_view.setText("已出现了"+totalCount+"只地鼠，还剩"+cc+"只地鼠"); steps = msg.arg1; MainActivity.this.diglet_View.setX(MainActivity.this.position_Array[steps][0]); MainActivity.this.diglet_View.setY(MainActivity.this.position_Array[steps][1]); MainActivity.this.diglet_View.setVisibility(View.VISIBLE); int randomTime = new Random().nextInt(RANDOM_NUMBER) + RANDOM_NUMBER; MainActivity.this.code(randomTime); break; } } };

这段代码是一个 Android 应用的主活动类 MainActivity，其中包含了一些成员变量和方法。其中成员变量包括了一些常量，如 MSG_CODE、MAX_NUMBER 和 RANDOM_NUMBER，以及一些用于显示游戏结果的 TextView 和 ImageView...

package com.example.ksswj; import androidx.appcompat.app.AppCompatActivity; import android.annotation.SuppressLint; import android.os.Bundle; import android.os.Handler; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.net.Socket; import java.net.UnknownHostException; public class MainActivity extends AppCompatActivity { private EditText ipEditText; private EditText portEditText; private TextView messageTextView; private BufferedReader in; private Socket socket; private Handler handler = new Handler(); @SuppressLint("MissingInflatedId") @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ipEditText = findViewById(R.id.ipEditText); portEditText = findViewById(R.id.portEditText); messageTextView = findViewById(R.id.messageTextView); Button connectButton = findViewById(R.id.connectButton); connectButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { String ip = ipEditText.getText().toString(); int port = Integer.parseInt(portEditText.getText().toString()); new Thread(new Runnable() { @Override public void run() { try { socket = new Socket(ip, port); in = new BufferedReader(new InputStreamReader(socket.getInputStream())); // 在主页面中的窗口中实时显示消息 while (true) { String message = in.readLine(); if (message == null) { break; } handler.post(new Runnable() { @Override public void run() { messageTextView.append(message + "\n"); } }); } } catch (UnknownHostException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } }).start(); } }); } @Override protected void onDestroy() { super.onDestroy(); try { if (in != null) { in.close(); } if (socket != null) { socket.close(); } } catch (IOException e) { e.printStackTrace(); } } }我还需要在上面代码中加入一个对话框，能够向端口发送消息，能帮我加上代码吗

import android.annotation.SuppressLint; import android.content.DialogInterface; import android.os.Bundle; import android.os.Handler; import android.view.LayoutInflater; import android.view.View; ...

package com.example.ksswj; import androidx.appcompat.app.AppCompatActivity; import android.annotation.SuppressLint; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.net.Socket; import java.net.UnknownHostException; public class MainActivity extends AppCompatActivity { private EditText ipEditText; private EditText portEditText; private TextView messageTextView; private BufferedReader in; private Socket socket; @SuppressLint("MissingInflatedId") @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ipEditText = findViewById(R.id.ipEditText); portEditText = findViewById(R.id.portEditText); messageTextView = findViewById(R.id.messageTextView); Button connectButton = findViewById(R.id.connectButton); connectButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { String ip = ipEditText.getText().toString(); int port = Integer.parseInt(portEditText.getText().toString()); try { socket = new Socket(ip, port); in = new BufferedReader(new InputStreamReader(socket.getInputStream())); // 在主页面中的窗口中实时显示消息 new Thread(new Runnable() { @Override public void run() { try { while (true) { String message = in.readLine(); if (message == null) { break; } runOnUiThread(new Runnable() { @Override public void run() { messageTextView.append(message + "\n"); } }); } } catch (IOException e) { e.printStackTrace(); } } }).start(); } catch (UnknownHostException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } }); } @Override protected void onDestroy() { super.onDestroy(); try { if (in != null) { in.close(); } if (socket != null) { socket.close(); } } catch (IOException e) { e.printStackTrace(); } } }帮我将代码改成线程执行网络操作

import android.annotation.SuppressLint; import android.os.Bundle; import android.os.Handler; import android.view.View; import android.widget.Button; import android.widget.EditText; import android....

package com.blog.demo11; import android.annotation.SuppressLint; import android.os.Bundle; import android.view.MotionEvent; import android.view.View; import android.widget.ImageView; import androidx.annotation.Nullable; import com.blog.BaseActivity; import com.blog.R; import static android.view.MotionEvent.INVALID_POINTER_ID; /** * 可拖拽效果类。 */ public class ViewDragActivity extends BaseActivity { private ImageView backgroundImage; private ImageView image1; private ImageView image2; @SuppressLint("MissingInflatedId") @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); backgroundImage = findViewById(R.id.background_image); image1 = findViewById(R.id.image1); image2 = findViewById(R.id.image2); // Set touch listeners for each image image1.setOnTouchListener(new MultiTouchListener()); image2.setOnTouchListener(new MultiTouchListener()); } private class MultiTouchListener implements View.OnTouchListener { private float lastTouchX, lastTouchY; private int activePointerId = INVALID_POINTER_ID; @Override public boolean onTouch(View v, MotionEvent event) { switch (event.getActionMasked()) { case MotionEvent.ACTION_DOWN: { final int pointerIndex = event.getActionIndex(); final float x = event.getX(pointerIndex); final float y = event.getY(pointerIndex); lastTouchX = x; lastTouchY = y; activePointerId = event.getPointerId(pointerIndex); break; } case MotionEvent.ACTION_MOVE: { final int pointerIndex = event.findPointerIndex(activePointerId); final float x = event.getX(pointerIndex); final float y = event.getY(pointerIndex); final float dx = x - lastTouchX; final float dy = y - lastTouchY; v.setX(v.getX() + dx); v.setY(v.getY() + dy); lastTouchX = x; lastTouchY = y; break; } case MotionEvent.ACTION_UP: case MotionEvent.ACTION_CANCEL: { activePointerId = INVALID_POINTER_ID; break; } case MotionEvent.ACTION_POINTER_UP: { final int pointerIndex = event.getActionIndex(); final int pointerId = event.getPointerId(pointerIndex); if (pointerId == activePointerId) { final int newPointerIndex = pointerIndex == 0 ? 1 : 0; lastTouchX = event.getX(newPointerIndex); lastTouchY = event.getY(newPointerIndex); activePointerId = event.getPointerId(newPointerIndex); } break; } } return true; } } }

这是一段 Android 应用程序代码，实现了一个可拖拽效果类 ViewDragActivity。在该类中，通过监听 onTouch 事件来实现多指触摸拖拽图片的效果，其中 MultiTouchListener 类实现了 View.OnTouchListener 接口，重写了 ...

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