数据展示+传值+存数据库
用到的依赖
大build
classpath 'org.greenrobot:greendao-gradle-plugin:3.0.0'
implementation 'com.facebook.fresco:fresco:1.2.0'
implementation 'com.google.code.gson:gson:2.8.5'
implementation 'com.squareup.okhttp3:okhttp:3.11.0'
implementation 'com.android.support:recyclerview-v7:28.0.0-beta01'
implementation 'de.greenrobot:eventbus:3.0.0-beta1'
apply plugin: 'org.greenrobot.greendao'
greendao {
schemaVersion 1
daoPackage 'com.bwei.greendao.gen'
targetGenDir 'src/main/java'
}
implementation'org.greenrobot:greendao:3.0.1'
implementation'org.greenrobot:greendao-generator:3.0.0'
第一个页面
1.xml
2.activity
public class MainActivity extends AppCompatActivity {
TextView textView;
SimpleDraweeView simpleDraweeView;
String path="https://img2.woyaogexing.com/2018/07/30/b2773d0e982efa66!400x400_big.jpg";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//注册
EventBus.getDefault().register(this);
textView=findViewById(R.id.textview);
simpleDraweeView=findViewById(R.id.sdv);
Uri uri=Uri.parse(path);
simpleDraweeView.setImageURI(uri);
simpleDraweeView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent it=new Intent(MainActivity.this,ShowActivity.class);
startActivity(it);
}
});
}
@Subscribe(threadMode = ThreadMode.MainThread)
public void getMsg(Chuan bean) {
textView.setText(bean.title);
simpleDraweeView.setImageURI(bean.url);
}
}
数据展示
1.model层
1》
public class User {
/**
* _id : 5b63cd4e9d21225e0d3f58c9
* createdAt : 2018-08-03T11:34:38.672Z
* desc : 2018-08-03
* publishedAt : 2018-08-03T00:00:00.0Z
* source : api
* type : 福利
* url : https://ww1.sinaimg.cn/large/0065oQSqgy1ftwcw4f4a5j30sg10j1g9.jpg
* used : true
* who : lijinshan
*/
public String _id;
public String createdAt;
public String desc;
public String publishedAt;
public String source;
public String type;
public String url;
public boolean used;
public String who;
}
2》
public class UserData {
public List results;
}
3.ITask
public interface ITask {
public void getUserList(String url, OkCallback callback);
}
4》Task
public class Task implements ITask {
@Override
public void getUserList(String url, OkCallback callback) {
OK.getOk().doGet(url,callback);
}
}
2.Presenter
1>基类
public interface BasePre {
void onDestroy();
}
2》Ipre
public interface IPresenter extends BasePre{
public void getData();
}
3>MyPresenter
public class MyPresenter implements IPresenter {
Task task;
IView view;
public MyPresenter(ShowActivity activity){
task = new Task();
view=activity;
}
@Override
public void getData() {
task.getUserList("http://gank.io/api/data/%E7%A6%8F%E5%88%A9/10/1", new OkCallback() {
@Override
public void onUI(String json) {
Log.i("TAG",json);
Gson gson=new Gson();
UserData userData = gson.fromJson(json, UserData.class);
view.getUser(userData.results);
}
@Override
public void onFailed(String json) {
}
});
}
@Override
public void onDestroy() {
view=null;
}
}
3.View
1>.IView
public interface IView {
public void getUser(List users);
}
2>.适配器
public class MyAdapter extends RecyclerView.Adapter{ private Context context; private List list; private OnItemClickListener onItemClickListener; public void setOnItemClickListener(OnItemClickListener onItemClickListener) { this.onItemClickListener = onItemClickListener; } public MyAdapter(Context context) { this.context = context; this.list=new ArrayList<>(); } public void addData(List users){ list.addAll(users); notifyDataSetChanged(); } @NonNull @Override public TextHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) { View view= LayoutInflater.from(context).inflate(R.layout.item_user,viewGroup,false); return new TextHolder(view); } @Override public void onBindViewHolder(@NonNull TextHolder textHolder, int i) { final User user=list.get(i); Uri uri=Uri.parse(user.url); textHolder.user_img.setImageURI(uri); textHolder.user_name.setText(user.who); textHolder.user_desc.setText(user.desc); textHolder.itemView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { if (onItemClickListener!=null){ onItemClickListener.getdata(user.url,user.who); } } }); } @Override public int getItemCount() { return list.size(); } class TextHolder extends RecyclerView.ViewHolder{ ImageView user_img; TextView user_name,user_desc; public TextHolder(@NonNull View itemView) { super(itemView); user_img=itemView.findViewById(R.id.user_img); user_name=itemView.findViewById(R.id.user_name); user_desc=itemView.findViewById(R.id.user_desc); } } public interface OnItemClickListener{ void getdata(String url,String title); } }
4.xml
2>.展示条目的数据
5.展示数据的activity
public class ShowActivity extends AppCompatActivity implements IView{
RecyclerView recyclerView;
MyPresenter presenter;
MyAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_show);
recyclerView=findViewById(R.id.recyclerview);
presenter=new MyPresenter(this);
presenter.getData();
recyclerView.setLayoutManager(new LinearLayoutManager(this));
recyclerView.addItemDecoration(new DividerItemDecoration(this, OrientationHelper.VERTICAL));
adapter=new MyAdapter(this);
recyclerView.setAdapter(adapter);
adapter.setOnItemClickListener(new MyAdapter.OnItemClickListener() {
@Override
public void getdata(String url, String title) {
EventBus.getDefault().post(new Chuan(url,title));
finish();
}
});
}
@Override
public void getUser(List users) {
adapter.addData(users);
}
}
6.传值
1.要传的属性类
@Entity
public class Chuan {
@Id(autoincrement = true)
public Long id;
public String url;
public String title;
public Chuan(String url, String title) {
this.title = title;
this.url = url;
}
public Chuan() {
}
@Generated(hash = 95212819)
public Chuan(Long id, String url, String title) {
this.id = id;
this.url = url;
this.title = title;
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public Long getId() {
return this.id;
}
public void setId(Long id) {
this.id = id;
}
}
2.接收值
public class MainActivity extends AppCompatActivity {
TextView textView;
SimpleDraweeView simpleDraweeView;
String path="https://img2.woyaogexing.com/2018/07/30/b2773d0e982efa66!400x400_big.jpg";
private ChuanDao chuanDao;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//注册
EventBus.getDefault().register(this);
textView=findViewById(R.id.textview);
simpleDraweeView=findViewById(R.id.sdv);
Uri uri=Uri.parse(path);
simpleDraweeView.setImageURI(uri);
simpleDraweeView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent it=new Intent(MainActivity.this,ShowActivity.class);
startActivity(it);
}
});
DaoSession daoSession= MyApp.getSession();
chuanDao=daoSession.getChuanDao();
}
@Subscribe(threadMode = ThreadMode.MainThread)
public void getMsg(Chuan bean) {
textView.setText(bean.title);
simpleDraweeView.setImageURI(bean.url);
Long id= bean.id;
String title=bean.title;
String url=bean.url;
Chuan chuan=new Chuan(id,title,url);
chuanDao.insert(chuan);
List chuans=chuanDao.loadAll();
for (int i=0;i
7.app
public class MyApp extends Application {
private static MyApp app;
private static DaoSession session;
@Override
public void onCreate() {
super.onCreate();
Fresco.initialize(this);
app=this;
setDB();
}
private void setDB() {
DaoMaster.DevOpenHelper devOpenHelper = new DaoMaster.DevOpenHelper(this, "user.db", null);
SQLiteDatabase database = devOpenHelper.getWritableDatabase();
DaoMaster daoMaster = new DaoMaster(database);
session=daoMaster.newSession();
}
public static DaoSession getSession(){
return session;
}
}