MainActivity页面
import android.content.ContentValues; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.support.v7.widget.DefaultItemAnimator; import android.support.v7.widget.LinearLayoutManager; import android.widget.Toast; import com.example.yuelianxi.adapter.NewsAdapter; import com.example.yuelianxi.bean.News; import com.example.yuelianxi.common.Constants; import com.example.yuelianxi.db.DbHelper; import com.example.yuelianxi.presenter.NewsPresenter; import com.example.yuelianxi.utils.NetWorkUtil; import com.example.yuelianxi.view.INews; import com.google.gson.Gson; import com.jcodecraeer.xrecyclerview.XRecyclerView; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; public class MainActivity extends AppCompatActivity implements INews { private XRecyclerView rv; private NewsPresenter presenter; private int page = 5010; private List<News.Data> data; private boolean isRefresh = true;//判断是下啦刷新还是上啦加载 private NewsAdapter newsAdapter; private DbHelper dbHelper; @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")); } dbHelper = new DbHelper(this); presenter = new NewsPresenter(this); data = new ArrayList<>(); request(); } public void request() { if (NetWorkUtil.hasWifiConnection(this) || NetWorkUtil.hasGPRSConnection(this)) { Map<String, String> p = new HashMap<>(); p.put("type", page + ""); presenter.getData(Constants.GET_URL,p); } else { Toast.makeText(this, "网络不通畅，请稍后再试！", Toast.LENGTH_SHORT).show(); String json = null; // //获取数据库对象，可读 SQLiteDatabase db = dbHelper.getReadableDatabase(); //获取数据库的游标 Cursor cursor = db.rawQuery("select * from news", null); while (cursor.moveToNext()){ json = cursor.getString(cursor.getColumnIndex("json")); } //本地列表刷新 fillLocalData(json); } } /** * 本地列表刷新 * @param json */ private void fillLocalData(String json) { News news = new Gson().fromJson(json,News.class); newsAdapter = new NewsAdapter(news.data, this); rv.setAdapter(newsAdapter); } private void initView() { rv = findViewById(R.id.rv); //设置局部刷新动画 rv.setItemAnimator(new DefaultItemAnimator()); rv.setPullRefreshEnabled(true);//刷新配置 rv.setLoadingMoreEnabled(true);//上拉配置 rv.setLayoutManager(new LinearLayoutManager(this)); rv.setLoadingListener(new XRecyclerView.LoadingListener() { @Override public void onRefresh() { // rv.refreshComplete(); isRefresh = true; //下拉刷新 page = 5010; request(); } @Override public void onLoadMore() { isRefresh = false; page++; request(); // rv.loadMoreComplete(); } }); } @Override public void success(News news) { //转换json串 String json = new Gson().toJson(news); System.out.println("size:" + news.data.size()); data = news.data; if (isRefresh) { newsAdapter = new NewsAdapter(data, this); rv.setAdapter(newsAdapter); rv.refreshComplete(); //保存json串数据 SQLiteDatabase db = dbHelper.getWritableDatabase(); ContentValues contentValues = new ContentValues(); contentValues.put("json", json); db.insert(DbHelper.NEWS_TABLE_NAME, null, contentValues); } else { if (newsAdapter != null) { //上啦加载更多，刷新 newsAdapter.loadMore(news.data); } rv.loadMoreComplete(); } } @Override protected void onDestroy() { super.onDestroy(); presenter.detach(); } }
activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.example.yuelianxi.MainActivity"> <com.jcodecraeer.xrecyclerview.XRecyclerView android:id="@+id/rv" android:layout_width="match_parent" android:layout_height="wrap_content"> </com.jcodecraeer.xrecyclerview.XRecyclerView>
</LinearLayout>
view层 INews
public interface INews { void success(News news); }
bean层 News
public class News { public String stat; public List<Data> data; public class Data{ public String topic; public String source; public List<IMG> miniimg; public class IMG{ public String src; } } }LocalNews
public class LocalNews { public String title; public String imgurls; public String source; public String time; public boolean isDel; }
common层 Constants
public class Constants { public static final String GET_URL="http://ttpc.dftoutiao.com/jsonpc/refresh?type=5010"; public static final int TYPE1=3; public static final int TYPE2=1; }
utils层 OkhttpUtils
public class OkhttpUtils { private static OkhttpUtils okhttpUtils; private OkHttpClient okHttpClient; private Handler handler; private OkhttpUtils(){ okHttpClient=new OkHttpClient.Builder() .addInterceptor(new HttpLoggingInterceptor().setLevel(HttpLoggingInterceptor.Level.BODY)) .build(); handler=new Handler(); } public static OkhttpUtils getInstance(){ if (okhttpUtils==null){ okhttpUtils=new OkhttpUtils(); } return okhttpUtils; } public void getData(String url, final ICallback iCallback){ final Request request=new Request.Builder().url(url).build(); okHttpClient.newCall(request).enqueue(new Callback() { @Override public void onFailure(Call call, IOException e) { if (iCallback!=null){ handler.post(new Runnable() { @Override public void run() { iCallback.fail("请求失败"); } }); } } @Override public void onResponse(Call call, Response response) throws IOException { if (iCallback!=null){ if (response.isSuccessful()&&response.code()==200){ final String result = response.body().string(); handler.post(new Runnable() { @Override public void run() { iCallback.Success(result); } }); } } } }); } public void postData(String url, Map<String,String> params,final ICallback iCallback){ FormBody.Builder builder=new FormBody.Builder(); for (Map.Entry<String, String> bean : params.entrySet()){ builder.add(bean.getKey(),bean.getValue()); } Request request=new Request.Builder() .url(url).post(builder.build()).build(); okHttpClient.newCall(request).enqueue(new Callback() { @Override public void onFailure(Call call, IOException e) { if (iCallback!=null){ handler.post(new Runnable() { @Override public void run() { iCallback.fail("请求失败"); } }); } } @Override public void onResponse(Call call, Response response) throws IOException { if (iCallback!=null){ if (response.isSuccessful()&&response.code()==200){ final String result = response.body().string(); } } } }); } public interface ICallback{ void Success(String result); void fail(String msg); } }
utils层AppUtil
public class AppUtil { public static int screenWidth(Context context){ DisplayMetrics metrics = context.getResources().getDisplayMetrics(); return metrics.widthPixels; } }
utils层 NetWorkUtil
public class NetWorkUtil { public final static boolean hasNetWorkConnection(Context context){ //获取连接活动管理器 final ConnectivityManager connectivityManager= (ConnectivityManager) context. getSystemService(Context.CONNECTIVITY_SERVICE); //获取链接网络信息 final NetworkInfo networkInfo=connectivityManager.getActiveNetworkInfo(); return (networkInfo!= null && networkInfo.isAvailable()); } /** * @return 返回boolean ,是否为wifi网络 * */ public final static boolean hasWifiConnection(Context context) { final ConnectivityManager connectivityManager= (ConnectivityManager) context. getSystemService(Context.CONNECTIVITY_SERVICE); final NetworkInfo networkInfo=connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI); //是否有网络并且已经连接 return (networkInfo!=null&& networkInfo.isConnectedOrConnecting()); } /** * @return 返回boolean,判断网络是否可用,是否为移动网络 * */ public final static boolean hasGPRSConnection(Context context){ //获取活动连接管理器 final ConnectivityManager connectivityManager= (ConnectivityManager) context. getSystemService(Context.CONNECTIVITY_SERVICE); final NetworkInfo networkInfo=connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE); return (networkInfo!=null && networkInfo.isAvailable()); } /** * @return 判断网络是否可用，并返回网络类型，ConnectivityManager.TYPE_WIFI，ConnectivityManager.TYPE_MOBILE，不可用返回-1 */ public static final int getNetWorkConnectionType(Context context){ final ConnectivityManager connectivityManager=(ConnectivityManager) context. getSystemService(Context.CONNECTIVITY_SERVICE); final NetworkInfo wifiNetworkInfo=connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI); final NetworkInfo mobileNetworkInfo=connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE); if(wifiNetworkInfo!=null &&wifiNetworkInfo.isAvailable()) { return ConnectivityManager.TYPE_WIFI; } else if(mobileNetworkInfo!=null &&mobileNetworkInfo.isAvailable()) { return ConnectivityManager.TYPE_MOBILE; } else { return -1; } } }
presenter层 NewsPresenter
public class NewsPresenter { private INews iNews; private NewsModel model; public NewsPresenter(INews iNews){ model=new NewsModel(); this.iNews=iNews; } public void getData(String getUrl, Map<String, String> p){ model.getData(getUrl, new NewsModel.ResponseCallback() { @Override public void success(String result) { String s = result.replace("null(","") .replace(")",""); Gson gson = new Gson(); News news = gson.fromJson(s, News.class); iNews.success(news); } @Override public void fail(String msg) { } }); } public void detach(){ this.iNews = null; } }
adapter层 NewsAdapter
public class NewsAdapter extends XRecyclerView.Adapter<XRecyclerView.ViewHolder>{ private List<News.Data> list; private Context context; private News news; public NewsAdapter(List<News.Data> list,Context context){ this.list=list; this.context=context; this.news = news; } public void loadMore(List<News.Data> data) { if (list != null) { list.addAll(data); notifyDataSetChanged(); } } @NonNull @Override public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) { if (viewType== Constants.TYPE1){ View view = LayoutInflater.from(context).inflate(R.layout.news_item2_layout, parent, false); return new Type1ViewHolder(view); }else { View view2 = LayoutInflater.from(context).inflate(R.layout.news_item_layout, parent, false); return new Type2ViewHolder(view2); } } @Override public void onBindViewHolder(@NonNull final RecyclerView.ViewHolder holder, int position) { holder.itemView.setOnLongClickListener(new View.OnLongClickListener() { @Override public boolean onLongClick(View view) { AlertDialog.Builder builder = new AlertDialog.Builder(context); builder.setTitle("删除"); builder.setNegativeButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i) { int pos = holder.getLayoutPosition();//得到下标 System.out.println("pos----"+pos); list.remove(pos);//删除集合的数据 news.data = list; String json = new Gson().toJson(news); notifyItemRemoved(pos);//局部删除当前view并局部刷新 } }); builder.setNeutralButton("取消", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i) { } }); builder.show(); return true; } }); News.Data data=list.get(position); if (holder instanceof Type1ViewHolder){ ((Type1ViewHolder)holder).title.setText(data.topic); }else if (holder instanceof Type2ViewHolder){ ((Type2ViewHolder) holder).title.setText(data.topic); if (data.miniimg!=null&&data.miniimg.size()>0){ if (data.miniimg.size()==1){ Glide.with(context).load(data.miniimg.get(0).src).into(((Type2ViewHolder)holder).iv1); Glide.with(context).load(data.miniimg.get(0).src).into(((Type2ViewHolder)holder).iv2); Glide.with(context).load(data.miniimg.get(0).src).into(((Type2ViewHolder)holder).iv3); }else if (data.miniimg.size()==2){ Glide.with(context).load(data.miniimg.get(0).src).into(((Type2ViewHolder)holder).iv1); Glide.with(context).load(data.miniimg.get(1).src).into(((Type2ViewHolder)holder).iv2); Glide.with(context).load(data.miniimg.get(1).src).into(((Type2ViewHolder)holder).iv3); }else { Glide.with(context).load(data.miniimg.get(0).src).into(((Type2ViewHolder)holder).iv1); Glide.with(context).load(data.miniimg.get(1).src).into(((Type2ViewHolder)holder).iv2); Glide.with(context).load(data.miniimg.get(2).src).into(((Type2ViewHolder)holder).iv3); } } } } @Override public int getItemViewType(int position) { return position %2==0 ? Constants.TYPE1:Constants.TYPE2; } @Override public int getItemCount() { return list.size(); } 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); } } }
db层 DbHelper
public class DbHelper extends SQLiteOpenHelper { private static final String DB_NAME = "news.db"; public static final String NEWS_TABLE_NAME = "news"; private static final int VERSION = 1; public DbHelper(Context context) { super(context, DB_NAME, null, VERSION); } @Override public void onCreate(SQLiteDatabase sqLiteDatabase) { String sql = "create table " + NEWS_TABLE_NAME + " (_id Integer PRIMARY KEY ,json text)"; sqLiteDatabase.execSQL(sql); } @Override public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) { } }
model层 NewsModel
public class NewsModel { public void getData(String getUrl,final ResponseCallback responseCallback){ OkhttpUtils.getInstance().getData(getUrl, new OkhttpUtils.ICallback() { @Override public void Success(String result) { Log.e("----",""+result); responseCallback.success(result); } @Override public void fail(String msg) { responseCallback.fail(msg); } }); } public interface ResponseCallback{ void success(String result); void fail(String msg); } }
widget层 ThreeColorView
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); } /** * 把此view的最终的宽度和高度定下来 * * @param widthMeasureSpec * @param heightMeasureSpec */ @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); int totalHeight = 0;//此控件的高度 int totalWidth = 0;//此控件的宽度 //得到子view数量 int child = getChildCount(); if (child > 0) { for (int i = 0; i < child; i++) {//遍历子控件 View view = getChildAt(i);//得到此容器所有的子view totalHeight += view.getMeasuredHeight(); measureChild(view,widthMeasureSpec,heightMeasureSpec); // view.measure(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; } //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; } }); } } }
TreeColorActivity页面
public class ThreeColorActivity extends AppCompatActivity{ private ThreeColorView threeColorView; private int count = 0; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_threecolor); threeColorView = findViewById(R.id.threecolorview); } /** * 添加view * @param view */ public void add(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.white)); ObjectAnimator objectAnimator = ObjectAnimator.ofFloat(textView,"translationX",(width-width/3),0); objectAnimator.setDuration(3000); objectAnimator.start(); if (count==1||count==4||count==7){ textView.setBackgroundColor(getResources().getColor(R.color.colorAccent)); }else{ textView.setBackgroundColor(getResources().getColor(R.color.colorPrimaryDark)); } threeColorView.addView(textView); //得到view的属性参数 ViewGroup.LayoutParams params = textView.getLayoutParams(); params.width = width/3; params.height = 70; textView.setLayoutParams(params); } }
activity_threecolor.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" > <Button android:id="@+id/add" android:onClick="add" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="aaa" /> <com.example.yuelianxi.widget.ThreeColorView android:id="@+id/threecolorview" android:layout_height="wrap_content" android:layout_width="wrap_content"> </com.example.yuelianxi.widget.ThreeColorView> </LinearLayout>
news_item2_layout.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:padding="10dp" > <ImageView android:id="@+id/img1" android:src="@mipmap/ic_launcher" android:scaleType="centerCrop" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <LinearLayout android:layout_marginTop="10dp" android:orientation="vertical" android:layout_width="0dp" android:layout_weight="1" android:layout_height="wrap_content"> <TextView android:id="@+id/title1" android:layout_marginLeft="10dp" android:text="我是标题" android:layout_width="match_parent" android:layout_height="wrap_content" /> </LinearLayout> </LinearLayout>
news_item_layout.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" android:padding="10dp" > <TextView android:id="@+id/title3" android:text="我还标题" android:layout_width="match_parent" android:layout_height="wrap_content" /> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_marginTop="10dp" > <ImageView android:id="@+id/img1" android:src="@mipmap/ic_launcher" android:layout_width="0dp" android:layout_weight="1" android:layout_height="wrap_content" android:scaleType="centerCrop" /> <ImageView android:id="@+id/img2" android:layout_marginLeft="10dp" android:layout_marginRight="10dp" android:src="@mipmap/ic_launcher" android:layout_width="0dp" android:scaleType="centerCrop" android:layout_weight="1" android:layout_height="wrap_content"/> <ImageView android:id="@+id/img3" android:src="@mipmap/ic_launcher" android:layout_width="0dp" android:layout_weight="1" android:scaleType="centerCrop" android:layout_height="wrap_content"/> </LinearLayout> </LinearLayout>
依赖包
compile 'com.github.bumptech.glide:glide:3.7.0' annotationProcessor 'com.github.bumptech.glide:compiler:4.7.1' implementation 'com.jcodecraeer:xrecyclerview:1.5.9' implementation 'com.squareup.okhttp3:logging-interceptor:3.10.0' compile 'com.squareup.okhttp3:okhttp:3.3.0' implementation 'com.google.code.gson:gson:2.2.4' } configurations.all { resolutionStrategy.eachDependency { DependencyResolveDetails details -> def requested = details.requested if (requested.group == 'com.android.support') { if (!requested.name.startsWith("multidex")) { details.useVersion '27.1.1' } } } }
权限
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.yuelianxi"> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> <uses-permission android:name="android.permission.INTERNET"/> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".ThreeColorActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".MainActivity"/> </application> </manifest>