自定义View+xrecyclerview多条目+数据库

自定义View实现三色梯

package com.example.yue.zidingyi;

import android.content.Context;
import android.content.Intent;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;

import com.example.yue.utils.AppUtil;
import com.example.yue.view.MainActivity;

public class ThreeColorView extends ViewGroup {


    public ThreeColorView(Context context) {
        super(context);
    }

    public ThreeColorView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public ThreeColorView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }


    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        int totalHeight=0;
        int totalWidth = 0;
        //获取到子view的数量
        int child=getChildCount();
        for (int i = 0; i < child; i++) {
            //得到所有文件中的子view
            View view=getChildAt(i);

            totalHeight+=view.getMeasuredHeight();
            measureChild(view,widthMeasureSpec,heightMeasureSpec);

        }
        totalWidth = AppUtil.screenWidth(getContext());
        System.out.println("width:"+totalWidth);
        System.out.println("height:"+totalHeight);


        //设置宽度和高度给当前view，通过下面这个方法
        setMeasuredDimension(totalWidth, totalHeight);
    }
    @Override
    protected void onLayout(boolean bo, int left, int top, int right, int bottom) {
        {
            int l = 0;
            int t = 0;
            int r = 0;
            int b = 0;

            int childCount = getChildCount();
            for (int i = 0; i < childCount; i++) {

                View view = getChildAt(i);//得到每一个view的对象

                view.layout(l, t, l + view.getMeasuredWidth(), t + view.getMeasuredHeight());

                l += view.getMeasuredWidth();

                System.out.println("llll:" + l);

                t += view.getMeasuredHeight();

                if (l + view.getMeasuredWidth() > AppUtil.screenWidth(getContext())) {
                    l = 0;
                }


//            if (AppUtil.screenWidth(getContext()) - l < view.getMeasuredWidth()) {
//                l = 0;
//            }

                //点击事件
                final int finalI = i;
                view.setOnClickListener(new OnClickListener() {
                    @Override
                    public void onClick(View view) {

                        Toast.makeText(getContext(), finalI + "：点击位置", Toast.LENGTH_SHORT).show();

                        TextView textView = (TextView) view;

                        Toast.makeText(getContext(), textView.getText().toString() + "文本", Toast.LENGTH_SHORT).show();

                        Intent intent = new Intent(getContext(), MainActivity.class);
                        intent.putExtra("id", textView.getText().toString());
                        getContext().startActivity(intent);

                    }
                });
                view.setOnLongClickListener(new OnLongClickListener() {
                    @Override
                    public boolean onLongClick(View view) {
                        Toast.makeText(getContext(), finalI + "：长按位置", Toast.LENGTH_SHORT).show();

                        removeView(view);
                        return true;
                    }
                });


            }


        }


    }

}

三色梯的工具类

package com.example.yue.utils;

import android.content.Context;
import android.util.DisplayMetrics;

/**
 * Author:kson
 * E-mail:[email protected]
 * Time:2018/05/30
 * Description:
 */
public class AppUtil {
    /**
     *
     * @param context
     * @return 屏幕宽度
     */
    public static int screenWidth(Context context){
        DisplayMetrics metrics = context.getResources().getDisplayMetrics();
        return  metrics.widthPixels;
    }
}

自定义View的Mainactivity

package com.example.yue.view;

import android.animation.ObjectAnimator;
import android.graphics.Color;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import com.example.yue.R;
import com.example.yue.utils.AppUtil;
import com.example.yue.zidingyi.ThreeColorView;

public class DonghuaActivity extends AppCompatActivity {

    private ThreeColorView threeColorView;
    private int count=0;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_donghua);
        threeColorView= findViewById(R.id.three);
    }

    public void bt(View view){
        count++;
        int width= AppUtil.screenWidth(this);
        TextView textView=new TextView(this);
        textView.setText(count+"");
        textView.setGravity(Gravity.CENTER);
        textView.setTextColor(getResources().getColor(R.color.ssss));
        ObjectAnimator objectAnimator = ObjectAnimator.ofFloat(textView,"translationX",(width-width/3),0);

        objectAnimator.setDuration(3000);
        objectAnimator.start();
        if (count % 3 == 1) {
            textView.setBackgroundColor(Color.RED);
        } else if (count % 3 == 2) {
            textView.setBackgroundColor(Color.YELLOW);
        } else {
            textView.setBackgroundColor(Color.BLUE);
        }
        threeColorView.addView(textView);
        ViewGroup.LayoutParams params = textView.getLayoutParams();
        params.width = width/3;
        params.height = 70;
        textView.setLayoutParams(params);
    }

}

Xrecyclerview的MainActivity

package com.example.yue.view;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.util.Log;
import android.view.View;

import com.example.yue.MyAdapter.MyAdapter;
import com.example.yue.R;
import com.example.yue.bean.Bean;
import com.example.yue.model.NewsAdapter;
import com.example.yue.presenter.Presenter;
import com.example.yue.utils.Api;
import com.jcodecraeer.xrecyclerview.XRecyclerView;

import java.util.List;

public class MainActivity extends AppCompatActivity implements IMActivity{
    private int page = 5010;
    private XRecyclerView xRecyclerView;
    private boolean isRefresh = true;//判断是下啦刷新还是上啦加载
    private Presenter presenter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        initData();

    }

    private void initData() {
        if (getIntent().getExtras() != null) {
            page = 5010 + Integer.parseInt(getIntent().getExtras().getString("id"));
        }
        presenter = new Presenter(this);
        presenter.getUrl(Api.LEFT_URL,page);

    }

    private void initView() {
        xRecyclerView = findViewById(R.id.rv);
        xRecyclerView.setLayoutManager(new LinearLayoutManager(this));
        xRecyclerView.setLoadingListener(new XRecyclerView.LoadingListener() {
           @Override
           public void onRefresh() {
           isRefresh=true;
           page=5010;
           presenter.getUrl(Api.LEFT_URL,page);
           xRecyclerView.refreshComplete();
           }

           @Override
           public void onLoadMore() {
               isRefresh=true;
               page++;
               presenter.getUrl(Api.LEFT_URL,page);
               xRecyclerView.loadMoreComplete();
           }
       });
    }

    @Override
    public void onSucces(final Bean bean) {
          runOnUiThread(new Runnable() {
              @Override
              public void run() {
                  List data = bean.getData();
                  Log.d("zzz",data.get(0).getDate());
                  MyAdapter myAdapter = new MyAdapter(data, MainActivity.this);
                  xRecyclerView.setAdapter(myAdapter);



              }
          });


    }
}

XrecyclerView的Adapter

package com.example.yue.MyAdapter;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import com.bumptech.glide.Glide;
import com.example.yue.R;
import com.example.yue.bean.Bean;
import com.example.yue.utils.Api;
import com.jcodecraeer.xrecyclerview.XRecyclerView;

import java.util.List;

public class MyAdapter extends XRecyclerView.Adapter{
    private List data;
    private Context context;

    public MyAdapter(List data, Context context) {
        this.data = data;
        this.context = context;
    }


    @NonNull
    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {

        if(viewType==Api.TYPE2){
            View view=LayoutInflater.from(context).inflate(R.layout.news_item_layout,null);
            return new Type2ViewHolder(view);
        }else {
            View view=LayoutInflater.from(context).inflate(R.layout.news_item2_layout,null);
            return new Type1ViewHolder(view);
        }

    }

    @Override
    public void onBindViewHolder(@NonNull final RecyclerView.ViewHolder holder, int position) {
        holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View v) {
                AlertDialog.Builder builder = new AlertDialog.Builder(context);
                builder.setTitle("删除");
                builder.setNegativeButton("确定", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        int pos = holder.getLayoutPosition()-1;//得到下标
                        if(pos>=1) {
                            data.remove(pos);
                            notifyItemRemoved(pos);
                        }
                    }
                });
                builder.setNeutralButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {

                    }
                });
                builder.show();


                return true;
            }

        });
        Bean.DataBean dataBean = data.get(position);
        if(holder instanceof Type1ViewHolder){
            ((Type1ViewHolder) holder).title.setText(dataBean.getTopic());
        }else if(holder instanceof Type2ViewHolder){
            String miniimgBean = dataBean.getMiniimg().get(0).getSrc();
            ((Type2ViewHolder) holder).title.setText(dataBean.getTopic());
            Glide.with(context).load(miniimgBean).into(((Type2ViewHolder) holder).iv1);
            Glide.with(context).load(miniimgBean).into(((Type2ViewHolder) holder).iv2);
            Glide.with(context).load(miniimgBean).into(((Type2ViewHolder) holder).iv3);
        }
    }


    @Override
    public int getItemCount() {
        return data.size();
    }

    @Override
    public int getItemViewType(int position) {
        if(position%3==2){
            return Api.TYPE2;
        }else {
            return Api.TYPE1;
        }

    }

    class Type1ViewHolder extends XRecyclerView.ViewHolder {

        private TextView title;

        public Type1ViewHolder(View itemView) {
            super(itemView);
            title = itemView.findViewById(R.id.title1);
        }
    }

    class Type2ViewHolder extends XRecyclerView.ViewHolder {

        private TextView title;
        private ImageView iv1, iv2, iv3;

        public Type2ViewHolder(View itemView) {
            super(itemView);
            iv1 = itemView.findViewById(R.id.img1);
            iv2 = itemView.findViewById(R.id.img2);
            iv3 = itemView.findViewById(R.id.img3);
            title = itemView.findViewById(R.id.title3);
        }
    }
}

OkHttp工具类

package com.example.yue.utils;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Environment;
import android.util.Log;
import android.widget.Toast;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import okhttp3.Cache;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.FormBody;
import okhttp3.Interceptor;
import okhttp3.MediaType;
import okhttp3.MultipartBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
import okhttp3.logging.HttpLoggingInterceptor;

public class OkHttp3Util {
    private static OkHttpClient okHttpClient =  null;
    public static OkHttpClient getInstance() {
                if (okHttpClient == null) {
                    okHttpClient = new OkHttpClient.Builder()//构建器
                            .addInterceptor(new HttpLoggingInterceptor().setLevel(HttpLoggingInterceptor.Level.BODY))//添加的是应用拦截器
                            //.addNetworkInterceptor(new CacheInterceptor())//添加的网络拦截器
                            .build();
                }
                   return okHttpClient;
            }

    public static void doGet(String oldUrl, Callback callback) {
        OkHttpClient okHttpClient = getInstance();
        Request request = new Request.Builder().url(oldUrl).build();
        Call call = okHttpClient.newCall(request);
        call.enqueue(callback);

    }

    public static void doPost(String url, Map params, Callback callback) {
        OkHttpClient okHttpClient = getInstance();
        FormBody.Builder builder = new FormBody.Builder();
        Request request = new Request.Builder().url(url).post(builder.build()).build();
        Call call = okHttpClient.newCall(request);
        call.enqueue(callback);
    }
}

数据库

package com.example.yue.db;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

public class DbHelper extends SQLiteOpenHelper{
    public DbHelper(Context context) {
        super(context,"dbname",null,1);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
       String sql="create table datable(id,integer primary key,json,text)";
       db.execSQL(sql);
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

    }
}