冲刺八

今天是冲刺的第八天，主要实现了用户跳转笔记详细信息界面和收藏。

遇到的困难：intent传递数据问题出错，收藏存在重复的行为。

解决思路：方法调用出错，读取整型采用读取字符串的方法进行读取出错，收藏前先对数据库进行读取，如果用户已经收藏过，提示用户信息并拒绝插入数据。

明天计划完成的任务：实现用户收藏列表界面

附上编写代码：

package com.itheima.cloudnotes.Activity;

import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.os.StrictMode;
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 com.itheima.cloudnotes.R;
import com.itheima.cloudnotes.db.DBService;
import com.itheima.cloudnotes.enity.Note;

public class Detail extends AppCompatActivity {
    private ImageView icon;
    private  TextView writer_name;
    private TextView date;
    private ImageView collect;
    private  TextView title;
    private TextView content;


    private Handler handler=new Handler(){
        @Override
        public void handleMessage(@NonNull Message msg) {

            switch(msg.what){
                case 0x11:
                    Toast.makeText(Detail.this, "收藏成功", Toast.LENGTH_SHORT).show( );
                    break;
                case 0x12:
                    Toast.makeText(Detail.this, "收藏失败", Toast.LENGTH_SHORT).show( );
                    break;
                default:
                    Toast.makeText(Detail.this, "收藏失败", Toast.LENGTH_SHORT).show( );
                    break;
            }

        }
    };

    @Override
    protected void onCreate(final Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_detail);
        StrictMode.ThreadPolicy policy=new StrictMode.ThreadPolicy.Builder().permitAll().build();
        StrictMode.setThreadPolicy(policy);
        icon=findViewById(R.id.icon);
        writer_name=findViewById(R.id.writer_name);
        date=findViewById(R.id.note_date);
        collect=findViewById(R.id.collect);
        title=findViewById(R.id.title);
        content=findViewById(R.id.content);
        Intent intent=getIntent();
        int note_id=intent.getIntExtra("note_id",0);
        DBService dbService=DBService.getDbService();
        Note note=dbService.getDetailNote(note_id);
        icon.setImageBitmap(note.getIcon());
        writer_name.setText(note.getWriter_name());
        date.setText(note.getDate());
        title.setText(note.getTitle());
        content.setText(note.getContent());
        collectNote(note_id);
    }

    public void collectNote(final int note_id)
    {
        SharedPreferences pref=    getSharedPreferences("user_id",    MODE_PRIVATE);
        final int userId = pref.getInt("userId",0);
        final int[] falg = {-1};
        collect.setOnClickListener(new View.OnClickListener( ) {
            @Override
            public void onClick(View v)
            {
                new Thread(new Runnable( ) {
                    public void run()
                    {
                        Message message=new Message();
                        if (falg[0] == -1) {
                            DBService dbService = DBService.getDbService( );
                            int result = dbService.insertCollect(userId, note_id);
                            if (result == 1) {
                                   falg[0] = 1;
                                   message.what=0x11;
                            } else {
                                    message.what=0x12;
                            }
                        }
                        handler.sendMessage(message);
                    }
                }).start();
            }
        });

    }




}