2021 5 27

云相册主界面activitr：

package com.michael.cloudphotos;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.drawerlayout.widget.DrawerLayout;
import androidx.navigation.NavController;
import androidx.navigation.Navigation;
import androidx.navigation.ui.AppBarConfiguration;
import androidx.navigation.ui.NavigationUI;

import com.google.android.material.navigation.NavigationView;
import com.luck.picture.lib.PictureSelector;
import com.luck.picture.lib.config.PictureConfig;
import com.luck.picture.lib.entity.LocalMedia;
import com.michael.cloudphotos.User_Page.user_click_later_page;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.regex.Pattern;

public class MainActivity extends AppCompatActivity {
    String count="0";
    private String id="未登录";
    private AppBarConfiguration mAppBarConfiguration;
    private ImageView mHead_portrait;
    public SQLhelper sqLhelper=new SQLhelper(MainActivity.this,"clouduser",null,1);
    helper p=new helper(sqLhelper);
    Handler handler=new Handler() {
        @Override
        public void handleMessage(@NonNull Message msg) {
            switch (msg.what) {
                case 1: {
                    Pattern pattern = Pattern.compile("^[-\+]?[\d]*$");
                    if(pattern.matcher(msg.obj.toString()).matches()){
                        count=msg.obj.toString();
                    }
                    break;
                }
            }
        }
    };
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //Home_Fragment
        Toolbar toolbar = findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        start();
        DrawerLayout drawer = findViewById(R.id.drawer_layout);
        NavigationView navigationView = findViewById(R.id.nav_view);//获取navigationView
        // Passing each menu ID as a set of Ids because each
        // menu should be considered as top level destinations.
        mAppBarConfiguration = new AppBarConfiguration.Builder(R.id.nav_home).setDrawerLayout(drawer).build();
        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
        NavigationUI.setupActionBarWithNavController(this, navController, mAppBarConfiguration);
        NavigationUI.setupWithNavController(navigationView, navController);

        //退出功能
        Menu menu=navigationView.getMenu();//获取NavigationView的子布局item对象
        navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
                switch (menuItem.getItemId()){
                    case R.id.nav_exit:
                        Exit.getInstance().exit();
                        break;
                }
                return false;
            }
        });


        //头像——跳转登录界面
        View headView=navigationView.getHeaderView(0);
        ImageView mHead_portrait= headView.findViewById(R.id.Head_portrait);//通过headView来获取头布局中的组件
        TextView userid=headView.findViewById(R.id.User_Name);
        userid.setText("用户名："+id);
        mHead_portrait.setOnClickListener(new View.OnClickListener() {      //如果有用户数据说明已经自动登录，没有则跳转到登录界面
            @Override
            public void onClick(View v) {
                if(!p.lastuser()) {
                    Intent intent = new Intent(MainActivity.this, HeadPortraitActivity.class);
                    startActivity(intent);
                }else {
                    //跳转到用户界面
                    Intent intent = new Intent(MainActivity.this, user_click_later_page.class);
                    intent.putExtra("id",id);
                    startActivity(intent);
                }
            }
        });
    }
    public void start()             //初始化
    {
        if(p.lastuser()) {
            id=p.lastid();          //获取已存在的用户信息
        }
        String time = new SimpleDateFormat("yyyy/MM/dd").format(new Date());
        p.getcount(id,time,handler);        //用于自动生成照片ID
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
    @Override
    public boolean onSupportNavigateUp() {
        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
        return NavigationUI.navigateUp(navController, mAppBarConfiguration) || super.onSupportNavigateUp();
    }
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {             //相册选择照片后调用的回调函数。保存照片ID+上传照片
        super.onActivityResult(requestCode, resultCode, data);
        String time = new SimpleDateFormat("yyyy/MM/dd").format(new Date());
        if (resultCode == RESULT_OK) {
            switch (requestCode) {
                case PictureConfig.CHOOSE_REQUEST:
                    List<LocalMedia> selectList = PictureSelector.obtainMultipleResult(data);
                    for(LocalMedia i:selectList)
                    {
                        count=String.valueOf(Integer.valueOf(count)+1);
                        p.updataphotoid(id+"-"+time+"-"+count,id,time,handler);
                        p.uploadImage(i.getPath(),id+"-"+time+"-"+count,MainActivity.this);
                        MainActivity.this.recreate();
                    }
                    break;
                case PictureConfig.CAMERA:
                    List<LocalMedia> a = PictureSelector.obtainMultipleResult(data);
                    Toast.makeText(MainActivity.this,a.get(0).getPath(),Toast.LENGTH_SHORT).show();
                    Log.i("??",a.get(0).getPath());
                    break;
            }
        }
    }

    @Override
    protected void onStart() {
        super.onStart();
    }
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (((keyCode == KeyEvent.KEYCODE_BACK) ||
                (keyCode == KeyEvent.KEYCODE_HOME))
                && event.getRepeatCount() == 0) {

            dialog_Exit(MainActivity.this);

        }
        return false;


    }
    private void dialog_Exit(Context context) {
        AlertDialog.Builder builder = new AlertDialog.Builder(context);
        builder.setMessage("确定要退出吗?");
        builder.setTitle("提示");
        builder.setIcon(android.R.drawable.ic_dialog_alert);
        builder.setPositiveButton("确认",
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.dismiss();
                        System.exit(0);
                        finish();
                    }
                });
        builder.setNegativeButton("取消",
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.dismiss();
                    }
                });

        builder.create().show();
    }
}