Android programming realizes reading, querying and adding functions of contacts in the address book

package com.example.write_person;

import android.content.ContentProviderOperation;
import android.content.ContentResolver;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private static final String TAG = "TestContact";
    private Button btn;
    private Button btn2;
    private Button btn3;

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

    //Query the name, phone, email of all contacts
    public void TestContact() throws Exception {
        Uri uri = Uri.parse("content://com.android.contacts/contacts");
        ContentResolver resolver = getApplicationContext().getContentResolver();
        Cursor cursor = resolver.query(uri, new String[]{"_id"}, null, null, null);
        while (cursor.moveToNext()) {
            int contractID = cursor.getInt(0);
            StringBuilder sb = new StringBuilder("contractID=");
            sb.append(contractID);
            uri = Uri.parse("content://com.android.contacts/contacts/" + contractID + "/data");
            Cursor cursor1 = resolver.query(uri, new String[]{"mimetype", "data1", "data2"}, null, null, null);
            while (cursor1.moveToNext()) {
                String data1 = cursor1.getString(cursor1.getColumnIndex("data1"));
                String mimeType = cursor1.getString(cursor1.getColumnIndex("mimetype"));
                if ("vnd.android.cursor.item/name".equals(mimeType)) { //is the name
                    sb.append(",name=" + data1);
                } else if ("vnd.android.cursor.item/email_v2".equals(mimeType)) { //邮箱
                    sb.append(",email=" + data1);
                } else if ("vnd.android.cursor.item/phone_v2".equals(mimeType)) { //手机
                    sb.append(",phone=" + data1);
                }
            }
            cursor1.close();
            Log.i(TAG, sb.toString());
        }
        cursor.close();
    }

    //Query the contact name and email address of the specified phone
    public void testContactNameByNumber() throws Exception {
        String number = "15600577833";
        Uri uri = Uri.parse("content://com.android.contacts/data/phones/filter/" + number);
        ContentResolver resolver = getApplicationContext().getContentResolver();
        Cursor cursor = resolver.query(uri, new String[]{"display_name"}, null, null, null);
        if (cursor.moveToFirst()) {
            String name = cursor.getString(0);
            Log.i(TAG, name);
        }
        cursor.close();
    }

    //Add contacts, use transactions
    public void testAddContact() throws Exception {
        Uri uri = Uri.parse("content://com.android.contacts/raw_contacts");
        ContentResolver resolver = getApplicationContext().getContentResolver();
        ArrayList<ContentProviderOperation> operations = new ArrayList<ContentProviderOperation>();
        ContentProviderOperation op1 = ContentProviderOperation.newInsert(uri)
                .withValue("account_name", null)
                .build();
        operations.add(op1);
        uri = Uri.parse("content://com.android.contacts/data");
        ContentProviderOperation op2 = ContentProviderOperation.newInsert(uri)
                .withValueBackReference("raw_contact_id", 0)
                .withValue("mimetype", "vnd.android.cursor.item/name")
                .withValue("data2", "张三三")
                .build();
        operations.add(op2);
        ContentProviderOperation op3 = ContentProviderOperation.newInsert(uri)
                .withValueBackReference("raw_contact_id", 0)
                .withValue("mimetype", "vnd.android.cursor.item/phone_v2")
                .withValue("data1", "13539777967")
                .withValue("data2", "2")
                .build();
        operations.add(op3);
        ContentProviderOperation op4 = ContentProviderOperation.newInsert(uri)
                .withValueBackReference("raw_contact_id", 0)
                .withValue("mimetype", "vnd.android.cursor.item/email_v2")
                .withValue("data1", "[email protected]")
                .withValue("data2", "2")
                .build();
        operations.add(op4);
        resolver.applyBatch("com.android.contacts", operations);
    }

    private void initView() {
        btn = (Button) findViewById(R.id.btn);

        btn.setOnClickListener(this);
        btn2 = (Button) findViewById(R.id.btn2);
        btn2.setOnClickListener(this);
        btn3 = (Button) findViewById(R.id.btn3);
        btn3.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.btn:

                try {
                    testAddContact();
                } catch (Exception e) {
                    e.printStackTrace ();
                }

                break;
            case R.id.btn2:

                try {
                    TestContact();
                } catch (Exception e) {
                    e.printStackTrace ();
                }

                break;
            case R.id.btn3:

                try {
                    testContactNameByNumber();
                } catch (Exception e) {
                    e.printStackTrace ();
                }

                break;
        }
    }
}

 

Add network permissions:

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_CONTACTS"/>
<uses-permission android:name="android.permission.WRITE_CONTACTS"/>

 

layout:

<?xml version="1.0" encoding="utf-8"?>
<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="com.example.write_person.MainActivity">

    <Button
        android:id="@+id/btn"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Click to add a contact!" />

    <Button
        android:id="@+id/btn2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Query the name, phone number, email address of all contacts" />

    <Button
        android:id="@+id/btn3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Query the contact name and email address of the specified phone" />

</LinearLayout>