Android_ContentProvider

package com.example.administrator.myapplication;

import android.content.ContentProvider;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.Context;
import android.content.UriMatcher;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.net.Uri;
import android.util.Log;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;

import static android.content.ContentValues.TAG;

public class MyContentProvider extends ContentProvider {

    private SQLiteDatabase db;
    private UriMatcher matcher;

    //    Context context;
    public MyContentProvider() {
//        this.context = context;
    }


    @Override
    public int delete(Uri uri, String selection, String[] selectionArgs) {
        // Implement this to handle requests to delete one or more rows.
        return db.delete("info_stu", selection, selectionArgs);

    }

    @Override
    public String getType(Uri uri) {
        // TODO: Implement this to handle requests for the MIME type of the data
        // at the given URI.
        throw new UnsupportedOperationException("Not yet implemented");
    }

    @Override
    public Uri insert(Uri uri, ContentValues values) {
        // TODO: Implement this to handle requests to insert a new row.
        long id = 0;
        if (values.size()>0){
            id = db.insert("info_stu", null, values);
        }else {
            //获取主机名
            String Authority = uri.getAuthority();
            //获取路径名
            String path = uri.getPath();
            //获取整个参数 uri中 ? 后面的所有内容
            String qury = uri.getQuery();
            //分别获取对应的参数
            String name = uri.getQueryParameter("name");
            String age = uri.getQueryParameter("age");
            String sex = uri.getQueryParameter("sex");
            values.put("name",name);
            values.put("age",age);
            values.put("sex",sex);
            id = db.insert("info_stu",null,values);
        }

        //将id追加到uri
        return ContentUris.withAppendedId(uri, id);
    }

    //在ContentProvider创建时调用,数据初始化操作
    @Override
    public boolean onCreate() {
        // TODO: Implement this to initialize your content provider on startup.
        SQLiteOpenHelper helper = new SQLiteOpenHelper(getContext(), "content.db", null, 2) {
            @Override
            public void onCreate(SQLiteDatabase sqLiteDatabase) {
                String sql = "create table info_stu(_id integer primary key autoincrement, " +
                        "name text,age integer,sex varchar(2))";
                sqLiteDatabase.execSQL(sql);

            }

            @Override
            public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) {

            }
        };
        db = helper.getReadableDatabase();
        //URi解析  参数代表无法匹配
        matcher = new UriMatcher(UriMatcher.NO_MATCH);
        //参数1 主机名(配置文件中) 参数2 路径  参数3 匹配码
        matcher.addURI("com.hejun", "search", 9999);
        matcher.addURI("com.hejun","search/name",10010);
  /*      //匹配该路径下任意数字的路径
        matcher.addURI("com.hejun","search/name/#",10011);
        //匹配该路径下任意字符的路径
        matcher.addURI("com.hejun","search/name/*",10012);*/



        //记得返回true,才能被加载
        return true;
    }

    @Override
    public Cursor query(Uri uri, String[] projection, String selection,
                        String[] selectionArgs, String sortOrder) {
        Log.e(TAG, "query: "+"执行了" );
        //解析匹配码
        int code = matcher.match(uri);
        Cursor cursor;
        //升序 asc  降序 desc
        switch (code){
            case 9999:
                Log.e(TAG, "insert: " + "9999");
                cursor = db.query("info_stu", projection, selection, selectionArgs, null, null, sortOrder);
                break;
            case 10010:
                Log.e(TAG, "insert: " + "10010");
                cursor = db.query("info_stu", projection, selection, selectionArgs, null, null, sortOrder);
                break;
                default:
                    cursor = db.query("info_stu", null, null, null, null, null, null);
                    break;
        }


        return cursor;
    }

    @Override
    public int update(Uri uri, ContentValues values, String selection,
                      String[] selectionArgs) {
        // TODO: Implement this to handle requests to update one or more rows.
        return db.update("info_stu", values, selection, selectionArgs);
    }
}

 <provider
            android:name=".MyContentProvider"
            android:authorities="com.hejun"
            android:enabled="true"
            android:exported="true"></provider>

package com.example.content_provider;

import android.content.ContentResolver;
import android.content.ContentUris;
import android.content.ContentValues;
import android.database.Cursor;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.CursorAdapter;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.RadioGroup;
import android.widget.SimpleCursorAdapter;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private ContentResolver contentResolver;
    EditText name,age,id;
    RadioGroup radioGroup;
    String sex = "男";
    private ListView listView;
    private static final String TAG = "MainActivity";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        name = findViewById(R.id.et_name);
        age = findViewById(R.id.et_age);
        id = findViewById(R.id.et_id);
        listView = findViewById(R.id.listView);
        radioGroup = findViewById(R.id.rg_sex);
        radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup radioGroup, int i) {
                if (i == R.id.rb_woman){
                    sex = "女";
                }else{
                    sex = "男";
                }
            }
        });

        //获取ContentResolver对象
        contentResolver = this.getContentResolver();
    }

    public void onButtonClick(View view) {
        Uri uri = Uri.parse("content://com.hejun");
        Uri uriMatch = Uri.parse("content://com.hejun/search");
        Uri uriMatch2 = Uri.parse("content://com.hejun/search/name");
        String name1 = name.getText().toString();
        String age1 = age.getText().toString();
        String id1 = id.getText().toString();
        switch (view.getId()){
            case R.id.in_button:
                //参数1 URI 统一资源定位符  参数2 ContentValues
                ContentValues values = new ContentValues();
                values.put("name",name1);
                values.put("age",age1);
                values.put("sex",sex);

                //该方法返回的Uri是insert方法中返回的uri,在通过ContentUris.parseId(uri)将id解析出来
                // 就可以获得当前所添加数据的id
                Uri uri2 = contentResolver.insert(uri,values);
                Toast.makeText(this, "添加成功,新学生的学号:" + ContentUris.parseId(uri2),Toast.LENGTH_SHORT).show();
                break;
            case R.id.sea_button:
                Cursor cursor = contentResolver.query(uri,null,null,null,null);
                SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,R.layout.listview_item,cursor,
                        new String[]{"_id","name","age","sex"},
                        new int[]{R.id.id_item,R.id.name_item,R.id.age_item,R.id.sex_item},
                        CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);
                listView.setAdapter(adapter);
                break;
            case R.id.del_button:
                int i = contentResolver.delete(uri,"_id = ?",new String[]{id1});
                if (i > 0){
                    Toast.makeText(this, "删除成功,删除了" + i + "条数据" ,Toast.LENGTH_SHORT).show();

                }else {
                    Toast.makeText(this, "删除失败" ,Toast.LENGTH_SHORT).show();

                }
                break;
            case R.id.upl_button:
                ContentValues values1 = new ContentValues();
                values1.put("name",name1);
                values1.put("age",age1);
                values1.put("sex",sex);
                int i1 = contentResolver.update(uri,values1,"_id = ?",new String[]{id1});
                if (i1 > 0){
                    Toast.makeText(this, "修改成功,修改了" + i1+ "条数据" ,Toast.LENGTH_SHORT).show();
                }else {
                    Toast.makeText(this, "修改失败" ,Toast.LENGTH_SHORT).show();
                }
                break;
            case R.id.search:
                Cursor cursor1 = contentResolver.query(uriMatch,null,"_id = ?",new String[]{id1},null);
                SimpleCursorAdapter adapter1 = new SimpleCursorAdapter(this,R.layout.listview_item,cursor1,
                        new String[]{"_id","name","age","sex"},
                        new int[]{R.id.id_item,R.id.name_item,R.id.age_item,R.id.sex_item},
                        CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);
                Log.e(TAG, "onButtonClick: "+ adapter1.isEmpty());
                listView.setAdapter(adapter1);
                break;
            case R.id.search2:
                Cursor cursor2 = contentResolver.query(uriMatch2,null,"name = ?",new String[]{name1},null);
                SimpleCursorAdapter adapter2 = new SimpleCursorAdapter(this,R.layout.listview_item,cursor2,
                        new String[]{"_id","name","age","sex"},
                        new int[]{R.id.id_item,R.id.name_item,R.id.age_item,R.id.sex_item},
                        CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);
                Log.e(TAG, "onButtonClick: "+ adapter2.isEmpty());
                listView.setAdapter(adapter2);
                break;
            case R.id.uri_button:
                Uri uri1 = contentResolver.insert(Uri.parse("content://com.hejun?name=heyong&age=15&sex=男"),new ContentValues());
                Toast.makeText(this, "添加成功,新学生的学号:" + ContentUris.parseId(uri1),Toast.LENGTH_SHORT).show();


                break;

        }
    }
}

package com.example.content_provider_phone;

import android.content.ContentUris;
import android.content.ContentValues;
import android.database.Cursor;
import android.net.Uri;
import android.provider.ContactsContract;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private ListView listView;
    private static final String TAG = "MainActivity";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        listView = findViewById(R.id.listView);
        findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
//                getsms();
//                getContact();
                addContact();
            }
        });
    }
    //读取短信信息
    public void getsms(){
        /**
         * content://sms 全部短信息内容
         * content://sms/sent 发件箱
         * content://sms//inbox 收件箱
         * content://sms/draft  草稿箱
         *
         * 不同的路径会做出不同处理
         */
        Uri uri = Uri.parse("content://sms");
        //查询所有短信息
        Cursor cursor = getContentResolver().query(uri,null,null,null,"date desc");
        List<String> list = new ArrayList<>();
        //解析Cursor
        if (cursor!=null){
            while (cursor.moveToNext()){
                String address = cursor.getString(cursor.getColumnIndex("address"));//手机号码
                String body = cursor.getString(cursor.getColumnIndex("body"));//信息内容
                long data = cursor.getLong(cursor.getColumnIndex("date"));//日期
                String type = cursor.getString(cursor.getColumnIndex("type"));//状态 1 接收 2 发送 3 草稿
                SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
                String date = simpleDateFormat.format(new Date(data));
                list.add("手机号码:‘" + address + " " +
                        "内容:" + body + " "+
                        "日期:" + date + " " +
                        "状态:" + type + " ");
            }
        }

        Log.e(TAG, "getsms: " + list.size() );
        ArrayAdapter<String> arrayAdapter = new ArrayAdapter<>(this,R.layout.item,R.id.text1,list);
        listView.setAdapter(arrayAdapter);
    }
    //查询联系人
    public void getContact(){
        /**
         * 由于 联系人的 姓名 和 电话号码 存放在不同的表中
         * 通过主键_id 进行关联
         */
        Uri uri = ContactsContract.Contacts.CONTENT_URI;
        Cursor cursor = getContentResolver().query(uri,null,null,null,null);
        List<String> list = new ArrayList<>();
        if (cursor!=null){
            while (cursor.moveToNext()){
                String name = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
                String id = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts._ID));


                String selection = ContactsContract.CommonDataKinds.Phone.CONTACT_ID + "= ?";
                Cursor cursor1 = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI,null,selection,new String[]{id},null);
                if (cursor1!=null){
                    while (cursor1.moveToNext()){
                        String number = cursor1.getString(cursor1.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));

                        list.add("联系人姓名:" + name + "电话号码:" + number);
                    }

                }

            }
        }
        Log.e(TAG, "getContact: " + list.size() );
        ArrayAdapter<String> arrayAdapter = new ArrayAdapter<>(this,R.layout.item,R.id.text1,list);
        listView.setAdapter(arrayAdapter);
    }
    //添加联系人
    public void addContact(){
        /**
         * 先添加一个空联系人,获取对应的id
         */
        ContentValues values = new ContentValues();
        Uri uri = getContentResolver().insert(ContactsContract.RawContacts.CONTENT_URI,values);
        //通过ContentUris解析uri的id
        long id = ContentUris.parseId(uri);

        //插入姓名
        //指定姓名列的内容
        values.put(ContactsContract.CommonDataKinds.StructuredName.GIVEN_NAME,"王家园");
        //指定指定和姓名关联的编号列的内容
        values.put(ContactsContract.Data.RAW_CONTACT_ID,id);
        //指定改行数据类型
        values.put(ContactsContract.Data.MIMETYPE,
                ContactsContract.CommonDataKinds.StructuredName.CONTENT_ITEM_TYPE);
        getContentResolver().insert(ContactsContract.Data.CONTENT_URI,values);

        //插入电话号码
        //清空ContentValues对象
        values.clear();
        //指定电话号码列的内容
        values.put(ContactsContract.CommonDataKinds.Phone.NUMBER, "15573401421198");
        //指定和电话号码关联的编号列的内容
        values.put(ContactsContract.Data.RAW_CONTACT_ID,id);
        //指定该行数据的类型
        values.put(ContactsContract.Data.MIMETYPE,
                ContactsContract.CommonDataKinds.Phone.CONTENT_ITEM_TYPE);
        //指定联系方式的类型
        values.put(ContactsContract.CommonDataKinds.Phone.TYPE,
                ContactsContract.CommonDataKinds.Phone.TYPE_MOBILE);

        getContentResolver().insert(ContactsContract.Data.CONTENT_URI,values);
    }
}