安卓读取短信验证码的java代码怎么写

在Android中读取短信验证码通常涉及到权限管理、SMS接收权限的请求以及使用Content Provider来访问短信数据库。以下是一个简单的示例，展示了如何获取短信列表并找到包含验证码的短信：

// 首先，需要添加读取短信的权限到AndroidManifest.xml文件
<uses-permission android:name="android.permission.READ_SMS" />

public class SmsReaderActivity extends AppCompatActivity {

    private static final int SMS_PERMISSION_REQUEST_CODE = 100;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestPermissions(new String[]{Manifest.permission.READ_SMS}, SMS_PERMISSION_REQUEST_CODE);
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        if (requestCode == SMS_PERMISSION_REQUEST_CODE && grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            readSmsForVerificationCode();
        } else {
            // 权限被拒绝，处理错误
            Toast.makeText(this, "缺少读取短信权限", Toast.LENGTH_SHORT).show();
        }
    }

    private void readSmsForVerificationCode() {
        ContentResolver resolver = getContentResolver();
        Cursor cursor = resolver.query(Uri.parse("content://sms/inbox"), null, null, null, null);

        try {
            if (cursor != null && cursor.moveToFirst()) {
                do {
                    String smsBody = cursor.getString(cursor.getColumnIndex(SmsColumns.BODY));
                    if (smsBody.matches("\\d{6}") { // 假设验证码是6位数字
                        String verificationCode = smsBody;
                        // 在这里处理验证码
                        // e.g. send it to server or use in your app logic
                        Log.d("SmsReader", "Found verification code: " + verificationCode);
                    }
                } while (cursor.moveToNext());
            }
        } finally {
            if (cursor != null) {
                cursor.close();
            }
        }
    }
}