food_store_database helper;

helper = new food_store_database(food_store.this, "basket.db", null, 1);

Button create_basket = (Button) findViewById(R.id.button1);

create_basket.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

helper.getWritableDatabase();

}

});

public  static final String CREATE_basket="create table basket("

+"id integer primary key autoincrement,"

+ "name text,"

+ "date text,"

+ "price real,"

+ "time real,"

+ "timeunit text,"

+ "number real,"

+ "numberunit text,"

+ "classify text,"

+ "address text)";

db.execSQL(CREATE_basket);

<style name="Theme.Basket" parent="Theme.MaterialComponents.DayNight.NoActionBar">

image_uri=FileProvider.getUriForFile(food_add.this,"com.example.Basket.fileprovider",outputImage); Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");

intent.putExtra(MediaStore.EXTRA_OUTPUT, image_uri);

startActivityForResult(intent, 1);

check_classify[0] =classify[position];

//准备数据 在此查询数据库

String name;

String path;

//需要获取名称与图片路径

Cursor cursor_food = db.rawQuery("select * from Basket where classify =?", new String[]{check_classify[0]});

//准备菜篮食物列表listview_

ListView listView_ = (ListView) findViewById(R.id.food_list);

//准备food_list 适配器

FoodAdaper adapter_ = new FoodAdaper(basket_food_.this, R.layout.fooditem, foodList);

listView_.setAdapter(adapter_);

listView_.setOnItemClickListener(new AdapterView.OnItemClickListener() {

public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

int jcdun;

for(jcdun=0;jcdun<listView_classify.getChildCount();jcdun++){

View tv = listView_classify.getChildAt(jcdun);

tv.setBackgroundColor(Color.parseColor("#f7f7f7"));

//利用整数jcdun遍历整个listview

//将所有的背景色设置为默认的灰色

}

listView_classify.getChildAt(

position-listView_classify.getFirstVisiblePosition())

.setBackgroundColor(Color.parseColor("#fd8e0a"));

//将选中的方框背景色修改为橙色

RadioGroup radioGroup = (RadioGroup) findViewById(R.id.food_tap);

RadioButton radioButton = (RadioButton) findViewById(radioGroup.getCheckedRadioButtonId());

TextView textView = (TextView) findViewById(R.id.food_top_title);

radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {

@Override

public void onCheckedChanged(RadioGroup group, int checkedId) {

if (checkedId == R.id.food_tab_home) {

textView.setText("首页");

Intent it = new Intent(getApplicationContext(), home_.class);

startActivity(it);

} else if (checkedId == R.id.food_tab_book) {

textView.setText("食谱");

Intent it = new Intent(getApplicationContext(), book.class);

startActivity(it);

} else if (checkedId == R.id.food_tab_food) {

textView.setText("菜篮");

} else if (checkedId == R.id.food_tab_my) {

textView.setText("我的");

Intent it = new Intent(getApplicationContext(), mine.class);

startActivity(it);}}});

<style name="tab_menu_item">

<item name="android:layout_width">0dp</item>

<item name="android:layout_weight">1</item>

<item name="android:layout_height">match_parent</item>

<item name="android:button">@null</item>

<item name="android:gravity">center</item>

<item name="android:textColor">@drawable/home1_text</item>

<item name="android:textSize">18sp</item>

</style>

paintAxes = new Paint();     //画轴(横轴和竖轴)

paintAxes.setStyle(Paint.Style.STROKE);

paintAxes.setAntiAlias(true);

paintAxes.setDither(true);

paintAxes.setColor(ContextCompat.getColor(getContext(), colors.get(0)));

paintAxes.setStrokeWidth(1);

paintCoordinate = new Paint(Paint.ANTI_ALIAS_FLAG);    //画坐标（文字或数值）

paintCoordinate.setColor(ContextCompat.getColor(getContext(), colors.get(1)));

paintCoordinate.setTextSize(22f);

paintRectF = new Paint();       //画矩形

paintRectF.setColor(ContextCompat.getColor(getContext(), colors.get(2)));

paintRectF.setStyle(Paint.Style.FILL);

paintRectF.setDither(true);

paintRectF.setAntiAlias(true);

WebView items = (WebView)findViewById(R.id.good_health_item);

// 使用Intent对象得到传过来的参数

Intent intent = getIntent();

String list = intent.getStringExtra("name");

items.loadUrl(list);

public boolean onItemLongClick(AdapterView<?> parent, View view, final intposition, long id) {

AlertDialog dialog;

AlertDialog.Builder builder = new AlertDialog.Builder( onenote.this).setMessage("是否删除此事件？").setPositiveButton("确定", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

OnenoteBean notepadBean = list.get(position);

if(mSQLiteHelper.deleteData(notepadBean.getId())){

list.remove(position);

adapter.notifyDataSetChanged();

Toast.makeText(onenote.this,"删除成功",

Toast.LENGTH_SHORT).show();

}

}

})

Cursor cursor_food =

db.rawQuery("select * from Basket where name like '%"

+ home_search_food_name.getText().toString() + "%'", null);

if (cursor_food.moveToFirst()) {

do{

name = (cursor_food.getString(1));

path = (cursor_food.getString(9));

File file = new File(path);

if(file.exists()){

Bitmap bm = BitmapFactory.decodeFile(path);

foodList.add(new food(name, bm));  }}

while(cursor_food.moveToNext());}

cursor_food.close();

public void handleMessage(@NonNull Message msg) {

// 解析JSON数据 从中获得我需要的内容！

super.handleMessage(msg);

if (msg.what == 0) {

String strData = (String) msg.obj;

str=strData;

JSONObject jsonObject1;

try {

jsonObject1 =

new JSONObject(str);

// 整个JSON对象

JSONObject jsonObject2=jsonObject1.getJSONObject("result");

// 进入result部分

JSONArray arr = jsonObject2.getJSONArray("list");

// 进入result-list部分

for(int i=0;i<30;i++){

jsonObject1 = arr.getJSONObject(i);

foodList.add(new book_food(jsonObject1.opt("name").toString(),jsonObject1.opt("pic").toString()));

}

//读取三十个结果

} catch (JSONException e) {

e.printStackTrace();

}

public void start(View view) {

new Thread(new Runnable() {

public void run() {

String stringFromNet = getStringFromNet();

Message message = new Message();

message.what = 0;

message.obj = stringFromNet;

mHandler.sendMessage(message); }}).start();

ext(this,"开启子线程请求网络！",Toast.LENGTH_SHORT).show();

}

<uses-permission android:name="android.permission.INTERNET" />

public static void savefile(String file, String conent) {        BufferedWriter out = null;

try {

out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file, true)));

out.write(conent);

} catch (Exception e) {

e.printStackTrace();

} finally {

try {

if(out != null){

out.close();}

} catch (IOException e) {

e.printStackTrace();}}}

private String loadFromSDFile(String fname) {

String result=null;

try {

File f=new File(fname);

int length=(int)f.length();

byte[] buff=new byte[length];

FileInputStream fin=new FileInputStream(f);

fin.read(buff);

fin.close();

result=new String(buff,"UTF-8");

}catch (Exception e){

e.printStackTrace();

Toast.makeText(shoucang.this,"没有找到指定文件",Toast.LENGTH_SHORT).show();

}

return result;

}