xUtils相关应用

初始化类

注：元注解不可以删除

package com.example.acer.foremonthjob;

import android.app.Application;

import org.xutils.x;

public class App extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        //初始化xutils
        x.Ext.init(this);
    }
}

主类下载图片

布局文件

<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:orientation="vertical"
    android:layout_height="match_parent"
    tools:context=".Demo">

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="下载图片"
        android:id="@+id/downimg"
        />
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="下载json"
        android:id="@+id/downjson"
        />
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="数据库"
        android:id="@+id/database"
        />
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="下载apk"
        android:id="@+id/downapk"
        />
    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/img"
        />

</LinearLayout>

代码

@ContentView(R.layout.activity_demo)
public class Demo extends AppCompatActivity {

    @ViewInject(R.id.img)
    private ImageView img;
    //图片网址
    String url = "http://pic27.nipic.com/20130329/890845_115317964000_2.jpg";

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

        //绑定控件和activity
        x.view().inject(this);
    }

    //添加点击事件
    @Event(value = {R.id.downapk,R.id.downjson,R.id.database,R.id.downimg},type = View.OnClickListener.class)
    private void click(View v){
        //判断事件跳转界面
        switch (v.getId()){
            case R.id.downapk:
                Intent intent = new Intent(Demo.this, DownApk.class);
                startActivity(intent);
                break;
            case R.id.downjson:
                Intent intent1 = new Intent(Demo.this, DownJson.class);
                startActivity(intent1);
                break;
            case R.id.database:
                Intent intent2 = new Intent(Demo.this, DBActivity.class);
                startActivity(intent2);
                break;
            case R.id.downimg:
                x.image().bind(img,url);
                break;
        }
    }
}

效果图

下载json串

布局文件

<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"
    android:orientation="vertical"
    tools:context=".DownJson">

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="下载"
        android:id="@+id/down"
        />
    <ListView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/list"
        ></ListView>

</LinearLayout>

代码

@ContentView(R.layout.activity_down_json)
public class DownJson extends AppCompatActivity {

    String url = "http://www.qubaobei.com/ios/cf/dish_list.php?stage_id=1&limit=10&page=1";
    @ViewInject(R.id.list)
    private ListView list;
    ArrayList<JsonBean> lists = new ArrayList<>();
    MyAdapter adapter;

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

        //绑定
        x.view().inject(this);
        //初始化适配器
        initAdapter();
    }

    private void initAdapter() {
        adapter = new MyAdapter(this,lists);
        list.setAdapter(adapter);
    }

    //点击事件
    @Event(value = R.id.down,type = View.OnClickListener.class)
    private void click(View view){
        RequestParams params = new RequestParams();
        params.setUri(url);
        x.http().get(params, new Callback.CommonCallback<String>() {
            @Override
            public void onSuccess(String result) {
                //调用解析方法
                json(result);
            }

            @Override
            public void onError(Throwable ex, boolean isOnCallback) {

            }

            @Override
            public void onCancelled(CancelledException cex) {

            }

            @Override
            public void onFinished() {

            }
        });
    }

    private void json(String s) {
        try {
            JSONObject object = new JSONObject(s);
            JSONArray data = object.getJSONArray("data");
            for (int i = 0; i < data.length(); i++) {
                JSONObject oo = data.getJSONObject(i);
                String title = oo.getString("title");
                String pic = oo.getString("pic");
                JsonBean jsonBean = new JsonBean(title, pic);
                lists.add(jsonBean);
            }
            //刷新适配器
            adapter.notifyDataSetChanged();
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }
}

适配器

class MyAdapter extends BaseAdapter {

    Context context;
    ArrayList<JsonBean> lists;

    public MyAdapter(Context context, ArrayList<JsonBean> lists) {
        this.context = context;
        this.lists = lists;
    }

    @Override
    public int getCount() {
        return lists.size();
    }

    @Override
    public Object getItem(int position) {
        return lists.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        final MyHolder holder;
        if(convertView == null){
            holder = new MyHolder();
            convertView = View.inflate(context,R.layout.item,null);
            holder.img = convertView.findViewById(R.id.imgs);
            holder.name = convertView.findViewById(R.id.name);
            convertView.setTag(holder);
        }else{
            holder = (MyHolder) convertView.getTag();
        }

        holder.name.setText(lists.get(position).name);
        Picasso.with(context).load(lists.get(position).pic).into(holder.img);

        return convertView;
    }

    class MyHolder{
        ImageView img;
        TextView name;
    }
}

效果图

下载apk

布局

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<android.support.constraint.ConstraintLayout 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=".DownApk">

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="下载apk"
        android:id="@+id/down_apk"
        />

</android.support.constraint.ConstraintLayout>

代码

@ContentView(R.layout.activity_down_apk)
public class DownApk extends AppCompatActivity {

    Callback.Cancelable cancelable;
    ProgressDialog dialog;
    String url = "http://softfile.3g.qq.com:8080/msoft/179/24659/43549/qq_hd_mini_1.4.apk";
    String path = Environment.getExternalStorageDirectory()+"/day.apk";

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

        //绑定
        x.view().inject(this);
        //初始化dialog
        initProg();
    }

    private void initProg() {
        dialog = new ProgressDialog(this);
        dialog.setTitle("下载apk");
        dialog.setMessage("下载中");
        dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
        dialog.setCanceledOnTouchOutside(false);
        //设置暂停按钮
        dialog.setButton(ProgressDialog.BUTTON_NEGATIVE, "暂停", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                //关闭
                cancelable.cancel();
            }
        });
    }

    //点击事件
    @Event(value = R.id.down_apk,type = View.OnClickListener.class)
    private void click(View view){
        RequestParams params = new RequestParams();
        params.setUri(url);
        //设置存储路径
        params.setSaveFilePath(path);
        params.setCancelFast(true);
        params.setAutoRename(true);

        cancelable = x.http().get(params, new Callback.ProgressCallback<File>() {
            @Override
            public void onSuccess(File result) {
                Toast.makeText(DownApk.this, "下载成功" + path, Toast.LENGTH_SHORT).show();

                //自动安装
                Intent intent = new Intent();
                intent.setAction(Intent.ACTION_VIEW);
                intent.setDataAndType(Uri.fromFile(result),"application/vnd.android.package-archive");
                intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                DownApk.this.startActivity(intent);
            }

            @Override
            public void onError(Throwable ex, boolean isOnCallback) {

            }

            @Override
            public void onCancelled(CancelledException cex) {

            }

            @Override
            public void onFinished() {
                //下载完成关闭dialog
                dialog.cancel();
            }

            @Override
            public void onWaiting() {

            }

            @Override
            public void onStarted() {
                //开始下载
                dialog.show();
            }

            @Override
            public void onLoading(long total, long current, boolean isDownloading) {
                //设置进度
                dialog.setProgress((int) (current*100/total));
            }
        });
    }
}

效果图

数据库添加查询

布局

<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"
    android:orientation="vertical"
    tools:context=".DBActivity">

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="增加"
        android:id="@+id/add"
        />
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/select"
        android:text="查询"
        />

</LinearLayout>

代码

@ContentView(R.layout.activity_db)
public class DBActivity extends AppCompatActivity {

    DbManager.DaoConfig config;
    DbManager db;

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

        x.view().inject(this);
        initDB();
    }

    private void initDB() {
        config = new DbManager.DaoConfig();

        config.setDbName("user");
        db = x.getDb(config);
    }

    @Event(value = {R.id.add,R.id.select},type = View.OnClickListener.class)
    private void click(View view){
        switch (view.getId()){
            case R.id.add:
                addUser();
                break;
            case R.id.select:
                selectUser();
                break;
        }
    }

    private void selectUser() {
        try {
            UserBean first = db.selector(UserBean.class).findFirst();
            Toast.makeText(this, first.toString(), Toast.LENGTH_SHORT).show();
        } catch (DbException e) {
            e.printStackTrace();
        }
    }

    private void addUser() {
        UserBean bean = new UserBean();
        bean.setId(2);
        bean.setAge(19);
        bean.setName("蛋蛋");
        try {
            db.save(bean);
        } catch (DbException e) {
            e.printStackTrace();
        }
    }
}

效果图