编写Android代码，完成一个添加联系人信息的功能，通过ContentResolver向系统中添加联系人信息。

具体要求：

? ? ? ? （1）添加动态联系人的权限。

? ? ? ? （2）创建Activity和布局文件，添加输入框和按钮等控件。

? ? ? ? （3）完成添加联系人的功能。

activity_main.xml代码

<!-- activity_main.xml -->
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <EditText
        android:id="@+id/editTextName"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="姓名" />

    <EditText
        android:id="@+id/editTextPhone"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/editTextName"
        android:layout_marginTop="16dp"
        android:hint="电话" />

    <Button
        android:id="@+id/buttonAddContact"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/editTextPhone"
        android:layout_marginTop="16dp"
        android:text="添加" />

</RelativeLayout>

MainActivity.java代码

package com.qcxy.lesson6;

import android.content.ContentProviderOperation;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    private EditText editTextName, editTextPhone;
    private Button buttonAddContact;

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

        editTextName = findViewById(R.id.editTextName);
        editTextPhone = findViewById(R.id.editTextPhone);
        buttonAddContact = findViewById(R.id.buttonAddContact);

        buttonAddContact.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                addContact();
            }
        });
    }

    private void addContact() {
        String name = editTextName.getText().toString().trim();
        String phone = editTextPhone.getText().toString().trim();

        if (name.isEmpty() || phone.isEmpty()) {
            Toast.makeText(this, "Name and Phone cannot be empty", Toast.LENGTH_SHORT).show();
            return;
        }

        ContentResolver contentResolver = getContentResolver();
        ArrayList<ContentProviderOperation> operations = new ArrayList<>();

        // 添加姓名
        operations.add(ContentProviderOperation.newInsert(ContactsContract.RawContacts.CONTENT_URI)
                .withValue(ContactsContract.RawContacts.ACCOUNT_TYPE, null)
                .withValue(ContactsContract.RawContacts.ACCOUNT_NAME, null)
                .build());

        operations.add(ContentProviderOperation.newInsert(ContactsContract.Data.CONTENT_URI)
                .withValueBackReference(ContactsContract.Data.RAW_CONTACT_ID, 0)
                .withValue(ContactsContract.Data.MIMETYPE, ContactsContract.CommonDataKinds.StructuredName.CONTENT_ITEM_TYPE)
                .withValue(ContactsContract.CommonDataKinds.StructuredName.DISPLAY_NAME, name)
                .build());

        // 添加电话号码
        operations.add(ContentProviderOperation.newInsert(ContactsContract.Data.CONTENT_URI)
                .withValueBackReference(ContactsContract.Data.RAW_CONTACT_ID, 0)
                .withValue(ContactsContract.Data.MIMETYPE, ContactsContract.CommonDataKinds.Phone.CONTENT_ITEM_TYPE)
                .withValue(ContactsContract.CommonDataKinds.Phone.NUMBER, phone)
                .withValue(ContactsContract.CommonDataKinds.Phone.TYPE, ContactsContract.CommonDataKinds.Phone.TYPE_MOBILE)
                .build());

        try {
            contentResolver.applyBatch(ContactsContract.AUTHORITY, operations);
            Toast.makeText(this, "Contact added successfully", Toast.LENGTH_SHORT).show();
        } catch (Exception e) {
            e.printStackTrace();
            Toast.makeText(this, "Error adding contact", Toast.LENGTH_SHORT).show();
        }
    }
}

记得在mainfest.xml中添加下面的代码，负责会报错哦

<uses-permission android:name="android.permission.READ_SMS"/>
    <uses-permission android:name="android.permission.READ_CONTACTS"/>
    <uses-permission android:name="android.permission.WRITE_CONTACTS"/>
<activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>